Engine Controls - Tests W/codes - 3.3L: Diagnosis Dodge Caravan III

SYSTEM DIAGNOSTICS

Note. Self-diagnostic tests are written specifically for Chrysler's Diagnostic Readout Box (DRB-III) scan tool, which will be referred to as DRB during testing procedures. If using a generic scan tool, ensure scan tool is OBD certified. A generic scan tool may not be capable of performing all necessary test functions. Malfunction Indicator Light (MIL), also known as SERVICE ENGINE SOON light, located in the message center above instrument cluster on driver's side of dashboard, may also be used for system diagnostics, but has limited diagnostic capability.

Note. Some wiring circuits may contain a Positive Temperature Coefficient (PTC). The PTC is a specified amperage solid-state circuit breaker located in junction box behind driver's side of instrument panel, to the left of steering column. To reset PTC, all current must be removed from PTC for approximately 20 seconds.

DIAGNOSTIC PROCEDURE

If no faults were found while performing appropriate BASIC TESTING - 3.3L, proceed with self-diagnostics. Always perform a visual inspection before attempting to diagnose engine control system problems. See VISUAL INSPECTION under SELF-DIAGNOSTIC SYSTEM. Retrieve DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM.

VISUAL INSPECTION

Most driveability problems in the engine control system result from faulty wiring, poor electrical connections, improper wire routing or leaking air and vacuum hose connections. Inspect all engine control system components, hoses, connectors and wiring for damage before proceeding with system testing.

RETRIEVING DIAGNOSTIC TROUBLE CODES

Note. When using Chrysler's Diagnostic Readout Box (DRB-III) scan tool, the scan tool will be able to identify or display all DTCs for system diagnosis. When using generic scan tool, it will be necessary to use Malfunction Indicator Light (MIL) in message center and generic scan tool to retrieve Diagnostic Trouble Codes (DTCs). Not all DTCs can be retrieved using generic scan tool and MIL. When using MIL to retrieve DTCs, some DTCs have more than one meaning. The MIL is unable to distinguish between different failures for a specified component. For example, there are 4 different possible failures for the downstream oxygen sensor system, but the MIL can only identify a downstream oxygen sensor failure by flashing a DTC 21, but the scan tool will be able to distinguish between the different failures.

Note. When using generic scan tool, scan tool is not able to identify all possible DTCs. As an example, generic scan tool may not be able to identify or display a DTC for a malfunctioning A/C clutch relay circuit or A/C pressure sensor, but these DTCs will be displayed by the MIL.

CLEARING DIAGNOSTIC TROUBLE CODES

Ensure ignition is off. Turn ignition on. Using screen prompts on scan tool, erase DTC from PCM.

INACTIVE TROUBLE CODE CONDITION

This procedure applies if you have been sent here from diagnostic tests and have just attempted to simulate the condition that initially set the Diagnostic Trouble Code (DTC). The following additional checks may assist in identifying a possible intermittent problem

1. Visually inspect related wiring harness connectors for broken, bent, pushed out or corroded terminals.
2. Visually inspect related wiring harnesses for chafed, pierced or partially broken wires.
3. Check for pertinent Technical Service Bulletins (TSBs) relating to the problem.

SELF-DIAGNOSTIC SYSTEM

SELF-DIAGNOSTIC TESTS

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. In the following self-diagnostic tests the illustrations are courtesy of Chrysler Corp.

Note. Some wiring circuits may contain a Positive Temperature Coefficient (PTC). The PTC is a specified amperage solid-state circuit breaker located in junction box behind driver's side of instrument panel, to the left of steering column. To reset PTC, all current must be removed from PTC for approximately 20 seconds.

Note. Before diagnosing an engine performance problem, refer to diagnostic system functions, abilities and system diagnostic procedures.

DTC TEST - CHECKING SYSTEM FOR DIAGNOSTIC TROUBLE CODES

Note. Ensure battery is fully charged before proceeding with test.

1. Attempt to start engine. Crank engine for up to 10 seconds (if necessary). Diagnostic Trouble Codes (DTCs) may be retrieved using scan tool or Malfunction Indicator Light (MIL) in message center.
2. When using MIL in message center to check for DTCs, see RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM. Read DTCs flashed by the MIL.
3. When using scan tool to check for DTCs, connect scan tool to Data Link Connector (DLC). For Data Link Connector (DLC) location, see RETRIEVING DIAGNOSTIC TROUBLE CODES. Using scan tool manufacturer's instructions, read DTC message (DRB scan tool) or DTC code (generic scan tool).
4. On any scan tools, if scan tool displays NO RESPONSE, perform TEST NS-2A. If scan tool will not power up, check for loose cable connections or bad cable. If cable connections and cable are okay, check voltage at cavity No. 16 (Pink wire) on DLC. Voltage should be at least 11 volts. If voltage is not as specified, check wiring circuit and necessary fuses. See wiring diagram in appropriate WIRING DIAGRAMS - 3.3L article.
5. If scan tool displays an error message, (i.e., USER-REQUESTED COLD BOOT or USER-REQUESTED WARM BOOT), follow scan tool manufacturer's instructions. If scan tool displays a BUS failure (i.e., SHORT TO BATTERY), this indicates either a scan tool failure or BUS failure. To diagnose and correct BUS failures, see appropriate VEHICLE COMMUNICATIONS article in ACCESSORIES & EQUIPMENT section.
6. On all applications, if DTCs are displayed, see DTC MESSAGES & CODES table and perform appropriate test(s). If no DTCs are displayed, refer to one of the following: For Driveability problems, perform TEST NTC-1A. For No-Start problems, Perform TEST NS-1A. For speed control problems, perform TEST SC-1A in appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT section. For charging system problems, perform TEST CH-1A in appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS section.

Note. When using MIL to retrieve DTCs, some DTCs have more than one meaning. The MIL is unable to distinguish between different failures for a specified component. For example, there are 4 different possible failures for the downstream oxygen sensor system, but the MIL can only identify an downstream oxygen sensor failure by flashing a DTC 21. See DTC MESSAGES & CODES table.

Note. If using Chrysler's Diagnostic Readout Box (DRB-III) scan tool, scan tool has ability to display all Diagnostic Trouble Codes (DTCs). Generic scan tool and/or MIL can also be used, but has limited diagnostic capability. Generic scan tool is not be able to identify all possible DTCs. As an example, generic scan tool may not be able to identify or display a DTC for a malfunctioning A/C clutch relay circuit, A/C pressure sensor, Auto Shutdown (ASD) relay circuit, charging system voltage circuit or knock sensor circuit. See DTC MESSAGES & CODES table.

DTC MESSAGES & CODES

TEST TC-1A - NO CAM SIGNAL AT PCM

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Attempt to start engine. If engine does not start, ensure engine is cranked for at least 15 seconds.
2. Using scan tool, check for DTCs. If DTC for NO CAM SIGNAL AT PCM returns, go to next step. If DTC for NO CAM SIGNAL AT PCM does not return, perform TEST TC-1C.
3. Ensure ignition is off. Disconnect connector at camshaft position sensor. Camshaft position sensor is located on top of timing chain cover, just below thermostat housing.
4. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
5. Using ohmmeter, check resistance between ground and Black/Light Blue wire on connector for camshaft position sensor. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Black/Light Blue wire between PCM and camshaft position sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
6. Turn ignition on. Using voltmeter, check voltage at Orange wire on connector for camshaft position sensor. If voltage is more than 7 volts, go to next step. If voltage is 7 volts or less, repair open circuit in Orange wire between PCM and camshaft position sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
7. Turn ignition off. Connect one end of a jumper wire to Tan/Yellow wire on connector for camshaft position sensor. Turn ignition on.
8. Using scan tool, read camshaft position sensor signal status. While observing scan tool display, momentarily touch other end of jumper wire to Black/Light Blue wire on connector for camshaft position sensor. If scan tool does not detect a camshaft signal change, go to next step. If scan tool detects a camshaft signal change, perform TEST TC-1B.
9. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
10. Using ohmmeter, check resistance between Tan/Yellow wire on connector for camshaft position sensor and PCM connector terminal No. 33 (Tan/Yellow wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Tan/Yellow wire between PCM and camshaft position sensor. Perform TEST VER-2A.
11. Using ohmmeter, check resistance between Tan/Yellow wire and Black/Light Blue wire in connector for camshaft position sensor. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short between Tan/Yellow and Black/Light Blue wires from PCM to camshaft position sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
12. Using ohmmeter, check resistance between ground and Tan/Yellow wire on connector for camshaft position sensor. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on Tan/Yellow wire between PCM and camshaft position sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
13. Using ohmmeter, check resistance between Tan/Yellow wire and Orange wire on connector for camshaft position sensor. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A. If resistance is less than 5 ohms, repair short between Tan/Yellow and Orange wires from PCM to camshaft position sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.

TEST TC-1B - NO CAM SIGNAL AT PCM

Note. Perform TEST TC-1A before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off.
2. Remove camshaft position sensor. Camshaft position sensor is located on top of timing chain cover, just below thermostat housing. Inspect camshaft sprocket for damage.
3. Replace camshaft sprocket if damaged. Perform TEST VER-2A. If camshaft sprocket is not damaged, replace camshaft position sensor. Perform TEST VER-2A.

TEST TC-1C - NO CAM SIGNAL AT PCM

Note. Perform TEST TC-1A before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Attempt to start engine. If engine starts, go to next step. If engine does not start, perform TEST NS-SEL.
2. The PCM provides an 8-volt supply, sensor ground and a 5-volt pull-up voltage (sensor signal) to Camshaft Position (CMP) sensor. The CMP sensor provides an output signal which is ON for 180 degrees and then OFF for 180 degrees. Output signal determines position of the camshaft, as a rising signal edge indicates cylinder No. 1, and a falling signal indicates cylinder No. 4. Conditions required to set DTC are not present at this time. DTC may be stored in PCM if no signal is received from camshaft position sensor during cranking signal.
3. Possible causes are: open 8-volt camshaft position sensor supply circuit, open camshaft position sensor ground circuit, open or shorted camshaft position sensor signal circuit, defective connector terminals or wiring, defective camshaft position sensor or defective PCM. Go to next step.
4. Check for defective wiring or connections at camshaft position sensor and PCM. The PCM is located between driver's side front fender and power distribution center, near battery. Camshaft position sensor is located on top of timing chain cover, just below thermostat housing.
5. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no possible causes are found, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.

TEST TC-5A - CHARGING SYSTEM VOLTAGE TOO LOW

Note. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure battery is fully charged and generator belt is in good condition and properly adjusted before proceeding. Using scan tool, read target charging voltage. If target charging voltage is 15.1 volts or less, go to step 4). If target charging voltage is more than 15.1 volts, go to next step.
2. Using scan tool temperature probe, measure underhood temperature near the Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery. Using scan tool, read the battery temperature sensor temperature.
3. If battery temperature sensor temperature is not within 10 degrees of the underhood temperature, replace PCM. Perform TEST VER-2A. If battery temperature sensor temperature is within 10 degrees of the underhood temperature, go to next step.
4. Connect voltmeter between positive B+ lead (large single battery terminal) on rear of generator and positive battery terminal. Start engine and note voltage reading on voltmeter. If voltage is .4 volt or less, go to next step. If voltage is more than .4 volt, repair B+ circuit between battery and generator for high resistance. Perform TEST VER-2A.
5. Turn ignition off. Connect voltmeter between generator case and negative battery terminal. Start engine and note voltage reading on voltmeter. If voltage is .1 volt or less, go to next step. If voltage is more than .1 volt, repair generator ground circuit for high resistance. Perform TEST VER-2A.
6. Remove voltmeter. Maintain engine RPM at 1600 RPM. Using scan tool, read target charging voltage and charging voltage. Compare the 2 readings.
7. If difference between the 2 readings is one volt or less, go to next step. If difference between the 2 readings is more than one volt, go to step 9).
8. Allow engine to idle. Shut engine off. Turn ignition on. Using scan tool, clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Perform TEST CH-1A in GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS section.
9. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery. Disconnect round 2-wire connector from rear of generator.
10. Using ohmmeter, check resistance between PCM connector terminal No. 6 (Dark Green/Orange wire) and Dark Green/Orange wire in round 2-wire connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit on Dark Green/Orange wire between PCM and round 2-wire connector at generator. Perform TEST VER-2A.
11. Using ohmmeter, check resistance between PCM connector terminal No. 4 (Dark Green wire) and Dark Green wire in round 2-wire connector. If resistance is less than 5 ohms, repair or replace generator as necessary. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit on Dark Green wire between PCM and round 2-wire connector at generator. Perform TEST VER-2A.

TEST TC-6A - CHARGING SYSTEM VOLTAGE TOO HIGH

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure battery is fully charged and generator belt is in good condition and properly adjusted before proceeding. Turn ignition on.
2. Using scan tool, actuate generator field driver. Using voltmeter, check voltage by backprobing terminal No. 2 (Dark Green wire) in the round 2-wire connector on rear of generator.
3. If voltage cycles from low voltage to high voltage, perform TEST TC-6B. If voltage does not cycle from low voltage to high voltage, go to next step.
4. Using scan tool, stop actuation of generator field driver. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
5. Disconnect round 2-wire connector from rear of generator. Using ohmmeter, check resistance between ground and PCM connector terminal No. 4 (Dark Green wire).
6. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair generator field driver circuit for short to ground in Dark Green wire between PCM and generator. Perform TEST VER-2A.
7. Using ohmmeter, check resistance between ground and generator field driver terminal in the generator. This is the terminal on rear of generator that the Dark Green wire in the round 2-wire connector fits on.
8. If resistance is less than 5 ohms, short circuit exists in the generator. Repair or replace generator. Perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A.

TEST TC-6B - CHARGING SYSTEM VOLTAGE TOO HIGH

Note. Perform TEST TC-6A before proceeding.

1. Using scan tool, stop actuation of generator field driver. Note the target charging voltage. If target charging voltage is 13 volts or less, go to next step. If target charging voltage is more than 13 volts, go to step 4).
2. Using scan tool temperature probe, measure underhood temperature near the Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery. Using scan tool, read the battery temperature sensor temperature.
3. If battery temperature sensor temperature is not within 10 degrees of the underhood temperature, replace Powertrain Control Module (PCM). Perform TEST VER-2A. If battery temperature sensor temperature is within 10 degrees of the underhood temperature, go to next step.
4. Start engine and maintain engine at 1600 RPM. Using scan tool, read target charging voltage and charging voltage. Compare the 2 readings for 5 minutes.
5. If difference between the 2 readings is more than one volt, replace PCM. Perform TEST VER-2A. If difference between the 2 readings is one volt or less, allow engine to idle. Shut engine off. Turn ignition on. Using scan tool, clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Perform TEST CH-1A in appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS section.

TEST TC-10A - AUTO SHUTDOWN RELAY CONTROL CIRCUIT

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Note. On 3.3L Compressed Natural Gas (CNG), Auto Shutdown (ASD) relay is referred to as the low pressure shutoff relay.

Scheme 127

Scheme 128

1. Using scan tool, actuate Auto Shutdown (ASD) relay. Listen for clicking sound at ASD relay. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. (Scheme 127) (Scheme 127): Locating ASD Relay & Identifying Power Distribution Center Cavities
2. If no clicking sound is heard at ASD relay, go to step 7). If clicking sound is heard at ASD relay, conditions required to set DTC are not present at this time.
3. The ASD relay provides voltage to fuel injectors, ignition coils, oxygen sensors, generator and low pressure solenoid on CNG applications. DTC may be stored in Powertrain Control Module (PCM) if an open or shorted condition is detected in the ASD relay control circuit. Possible causes are: ASD relay coils open or shorted, open fused ignition circuit to ASD relay, ASD control circuit open or shorted, inoperative circuit driver in PCM, defective PCM, defective connector terminals or wiring. Go to next step.
4. Check for defective wiring or connections at ASD relay and PCM. The PCM is located between driver's side front fender and power distribution center, near battery. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A.
5. If no defective wiring or connections exist, start engine. Wiggle wiring harness from ASD relay to the PCM.
6. If engine stalls while wiggling the wiring harness, repair wiring as necessary. Perform TEST VER-2A. If engine does not stall while wiggling the wiring harness, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
7. Remove ASD relay from power distribution center. (Scheme 127) Using voltmeter, check voltage at cavity "A" B+ circuit (Red wire) in power distribution center. (Scheme 127)
8. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in B+ circuit (Red wire) to ASD relay. Perform TEST VER-2A.
9. Using ohmmeter, check resistance between terminals No. 85 and 86 on ASD relay. (Scheme 128) If resistance is less than 100 ohms, go to next step. If resistance is 100 ohms or more, replace ASD relay. Perform TEST VER-2A. (Scheme 128): Identifying ASD Relay Terminals
10. Ensure ignition is off. Disconnect Gray connector from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
11. Using ohmmeter, check resistance between ground and PCM connector terminal No. 67 (Dark Blue/Yellow wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair ASD relay control circuit for short to ground in Dark Blue/Yellow wire between PCM and ASD relay. Perform TEST VER-2A.
12. Using ohmmeter, check resistance between cavity "C" (Dark Blue/Yellow wire) for ASD relay on power distribution center and PCM connector terminal No. 67 (Dark Blue/Yellow wire). (Scheme 127)
13. If resistance is 5 ohms or more, repair open circuit in Dark Blue/Yellow wire between PCM and ASD relay. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-11A - GENERATOR FIELD NOT SWITCHING PROPERLY

1. Using scan tool, clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Turn ignition on. Using scan tool, actuate generator field driver. Using voltmeter, check voltage by backprobing terminal No. 1 (Dark Green/Orange wire) in the round 2-wire connector on rear of generator.
2. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in Dark Green/Orange wire from generator to the Auto Shutdown (ASD) relay. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. (Scheme 127) Perform TEST VER-3A.
3. Using voltmeter, check voltage by backprobing terminal No. 2 (Dark Green wire) in the round 2-wire connector on rear of generator. If voltage cycles from low voltage to high voltage, go to next step. If voltage does not cycle from low voltage to high voltage, go to step 10).
4. Conditions required to set DTC are not present at this time. The PCM regulates charging system voltage at 12.9-15.0 volts. Charging system voltage determined by PCM is referred to as the control voltage. Control voltage is determined from the battery temperature sensor input signal to PCM. Control voltage is compared to the sensed voltage so PCM may control the field circuit ground to obtain correct voltage.
5. DTC may be stored in Powertrain Control Module (PCM) when PCM tries to regulate the generator field with no result. Possible causes are: field driver circuit open or shorted, generator internally open or shorted, defective PCM, defective connector terminals or wiring. Go to next step.
6. Check for defective wiring or connections at rear of generator, PCM and ASD relay. The PCM is located between driver's side front fender and power distribution center, near battery. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. (Scheme 127)
7. If defective wiring or connections exist, repair as necessary. Perform TEST VER-3A. If no defective wiring or connections exist, go to next step.
8. Using scan tool, check for DTCs with generator field driver still actuated. Wiggle wiring harness from generator to the PCM and note if DTC is set to indicate generator field is not switching properly.
9. If DTC for generator field not switching is set, repair wiring harness as necessary. Perform TEST VER-3A. If DTC was not set, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-3A.
10. Using scan tool, stop actuation of generator field driver. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
11. Disconnect round 2-wire connector from rear of generator. Using ohmmeter, check resistance between terminal No. 2 (Dark Green wire) on round 2-wire connector and PCM connector terminal No. 4 (Dark Green wire).
12. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair generator field driver circuit for open circuit in Dark Green wire between PCM and generator. Perform TEST VER-3A.
13. Using ohmmeter, check resistance between both generator field driver terminals inside the generator. These are the terminals that the round 2-wire connector fits on at rear of generator.
14. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair or replace generator as necessary. Perform TEST VER-3A.
15. Using ohmmeter, check resistance between ground and terminal No. 2 (Dark Green wire) in the round 2-wire connector that was disconnected from rear of generator.
16. If resistance is less than 5 ohms, repair short to ground in Dark Green wire between generator and PCM. Perform TEST VER-3A. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-3A.

TEST TC-14A - RADIATOR FAN CONTROL RELAY CIRCUIT

Note. Radiator fan control relay may be referred to as radiator fan relay. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Scheme 129

1. Using scan tool, actuate radiator fan control relay. If both radiator fans are cycling on and off, go to next step. If both radiator fans do not cycle on and off, go to step 6).
2. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) if an open or short circuit exists in radiator fan control relay circuit. Possible causes are: defective radiator fan control relay, fused B+ circuit open, radiator fan control relay wiring circuit open or shorted, defective PCM, defective connector terminals or wiring. Go to next step.
3. Check for defective wiring or connections at radiator fan control relay, PCM and fused battery voltage wiring from fuse in power distribution center to radiator fan control relay. Radiator fan control relay is located near driver's side frame rail and air cleaner lower mount. (Scheme 129) The PCM is located between driver's side front fender and power distribution center, near battery. (Scheme 129): Locating Radiator Fan Control Relay
4. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, go to next step.
5. Wiggle wiring harness from radiator fan control relay to the PCM while radiator fan control relay is still actuated and radiator fans are cycling on and off. If radiator fan operation was interrupted while wiggling wiring harness, repair wiring harness as necessary. Perform TEST VER-2A. If radiator fans continue to cycle on and off while wiggling wiring harness, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
6. Using voltmeter, check voltage by backprobing terminal No. 3 (Dark Green wire) on connector at radiator fan control relay with radiator fan control relay still actuated. Radiator fan control relay is located near driver's side frame rail and air cleaner lower mount. (Scheme 130)
7. If voltage does not cycle from no voltage to battery voltage, go to next step. If voltage cycles from no voltage to battery voltage, repair or replace radiator cooling fans or wiring from radiator fan control relay to radiator cooling fans as necessary. Perform TEST VER-2A.
8. Disconnect connector from radiator fan control relay. Radiator fan control relay is located near driver's side frame rail and air cleaner lower mount. (Scheme 130)
9. Using voltmeter, check voltage at terminal No. 4 (Gray wire) on connector for radiator fan control relay. If voltage is more than 10 volts, go to step 11).
10. If voltage is 10 volts or less, repair open circuit in Gray wire to radiator fan control relay. Ensure radiator fan fuse No. 4 in power distribution center is okay. Power distribution center is located in engine compartment, near battery. Perform TEST VER-2A.
11. Ensure ignition is off. Using ohmmeter, check resistance between ground and terminal No. 1 (Black wire) on connector for radiator fan control relay. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in the Black wire between radiator fan control relay and ground. Perform TEST VER-2A.
12. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
13. Using ohmmeter, check resistance between ground and PCM connector terminal No. 73 (Light Green/Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in Light Green/Dark Blue wire between PCM and radiator fan control relay. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
14. Using ohmmeter, check resistance between terminal No. 2 (Light Green/Dark Blue wire) on connector for radiator fan control relay and PCM connector terminal No. 73 (Light Green/Dark Blue wire). If resistance is 5 ohms or more, repair open circuit in Light Green/Dark Blue wire between PCM and radiator fan control relay. Perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
15. Reinstall connector on radiator fan control relay. Connect jumper wire to PCM connector terminal No. 73 (Light Green/Dark Blue wire). Momentarily touch other end of jumper wire to ground and note if radiator cooling fans operate.
16. If radiator cooling fans operate, replace PCM. Perform TEST VER-2A. If radiator cooling fans do not operate, replace radiator fan control relay. Perform TEST VER-2A.

TEST TC-15A - SPEED CONTROL SOLENOID CIRCUITS

Note. DTC may be caused by an improperly adjusted brake switch. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. To check brake switch adjustment, depress brake pedal. Ensure brake lights come on. Release brake pedal. Ensure brake lights go off. If brake light operation is not as specified, go to next step. If brake switch is properly adjusted and brake light operation is correct, go to step 4).
2. To adjust brake switch, hold brake pedal downward. Rotate brake switch counterclockwise approximately 30 degrees and pull brake switch rearward from mounting bracket. Brake switch is mounted near top of brake pedal.
3. Pull plunger on brake switch outward to fully extended position. Depress brake pedal as far as possible. Install brake switch in mounting bracket. Ensure alignment tab on brake switch aligns with opening on mounting bracket. When brake switch is fully installed, rotate brake switch clockwise approximately 30 degrees. To ensure proper adjustment, gently pull brake pedal back toward brake switch as far as possible. DO NOT apply excessive pressure on brake pedal and brake switch. Once brake switch is properly adjusted, perform TEST VER-4A.
4. Disconnect connector from speed control servo. Speed control servo is bolted to rear of battery tray and contains a 4-pin connector.
5. Turn ignition on with engine off. Turn speed control switch to ON position. Using voltmeter, check voltage at terminal No. 3 (Dark Blue/Red wire) on connector for speed control servo. DO NOT depress brake pedal when checking voltage. If voltage is more than 10 volts, go to step 11). If voltage is 10 volts or less, go to next step.
6. Turn ignition off. Using ohmmeter, check resistance between ground and terminal No. 3 (Dark Blue/Red wire) on connector for speed control servo. DO NOT depress brake pedal when checking resistance.
7. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on Dark Blue/Red wire between speed control servo and brake switch. Perform TEST VER-4A.
8. Disconnect connector from brake switch located near top of brake pedal. Turn ignition on with engine off. Turn speed control switch to ON position. Using voltmeter, check voltage at terminal No. 3 (Yellow/Red wire) on connector for brake switch. If voltage is more than 10 volts, perform TEST TC-15B. If voltage is 10 volts or less, go to next step.
9. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
10. Using ohmmeter, check resistance between terminal No. 3 (Yellow/Red wire) on connector for brake switch and PCM connector terminal No. 5 (Yellow/Red wire). If resistance is 5 ohms or more, repair open circuit in Yellow/Red wire between PCM and brake switch. Perform TEST VER-4A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-4A.
11. Ensure ignition is off. Using ohmmeter, check resistance between ground and terminal No. 4 (Black wire) on connector for speed control servo. If resistance is 5 ohms or more, repair open circuit in Black wire and ground connection. Perform TEST VER-4A. If resistance is less than 5 ohms, go to next step.
12. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
13. Reinstall connector on speed control servo. Using ohmmeter, check resistance between PCM connector terminals No. 5 (Yellow/Red wire) and No. 80 (Light Green/Red wire). DO NOT depress brake pedal when checking resistance. If resistance is 35-55 ohms, go to next step. If resistance is not 35-55 ohms, go to step 15).
14. Using ohmmeter, check resistance between PCM connector terminals No. 5 (Yellow/Red wire) and No. 78 (Tan/Red wire). DO NOT depress brake pedal when checking resistance. If resistance is not 35-55 ohms, go to next step. If resistance is 35-55 ohms, replace PCM. Perform TEST VER-4A.
15. Disconnect connector from speed control servo. Using ohmmeter, check resistance between PCM connector terminal No. 78 (Tan/Red wire) and terminal No. 1 (Tan/Red wire) on connector for speed control servo.
16. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Tan/Red wire between PCM and speed control servo. Perform TEST VER-4A.
17. Using ohmmeter, check resistance between PCM connector terminal No. 80 (Light Green/Red wire) and terminal No. 2 (Light Green/Red wire) on connector for speed control servo.
18. If resistance is less than 5 ohms, replace speed control servo. Perform TEST VER-4A. If resistance is 5 ohms or more, repair open circuit in Light Green/Red wire between PCM and speed control servo. Perform TEST VER-4A.

TEST TC-15B - SPEED CONTROL SOLENOID CIRCUITS

Note. Perform TEST TC-15A before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using ohmmeter, check resistance between terminal No. 4 (Dark Blue/Red wire) on connector for brake switch and terminal No. 3 (Dark Blue/Red wire) on connector for speed control servo.
2. If resistance is less than 5 ohms, replace brake switch. Perform TEST VER-4A. If resistance is 5 ohms or more, repair open circuit in Dark Blue/Red wire between brake switch and speed control servo. Perform TEST VER-4A.

TEST TC-16A - A/C CLUTCH RELAY CIRCUIT

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Note. A/C clutch relay may also be referred to as A/C compressor clutch relay.

Scheme 130

Scheme 131

1. Using scan tool, actuate A/C clutch relay. Listen for clicking sound at A/C clutch relay located in power distribution center at driver's side front corner of engine compartment, near battery. (Scheme 130) (Scheme 130): Locating A/C Clutch Relay & Identifying Power Distribution Center Cavities
2. If no clicking sound is heard at A/C clutch relay, go to step 6). If clicking sound is heard at A/C clutch relay, conditions required to set DTC are not present at this time. A/C clutch relay controls 12-volt operating voltage for A/C compressor clutch. When A/C operation is requested, Powertrain Control Module (PCM) controls Idle Air Control (IAC) motor to increase engine idle speed.
3. DTC may be stored in PCM if an open or shorted condition is detected in A/C clutch relay control circuit. Possible causes are: A/C clutch relay coil open or shorted, fused ignition switch output circuit open, A/C clutch relay control circuit open or shorted, inoperative circuit driver in PCM, defective connector terminals or wiring.
4. Check for defective wiring or connections at PCM and A/C clutch relay. The PCM is located between driver's side front fender and power distribution center, near battery. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A.
5. If no defective wiring or connections exist, wiggle wiring harness from A/C clutch relay to PCM while A/C clutch relay is still actuated. If clicking sound at A/C clutch relay was interrupted while wiggling wiring harness, repair wiring harness as necessary. Perform TEST VER-2A. If clicking sound at A/C clutch relay was not interrupted while wiggling wiring harness, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
6. Remove A/C clutch relay from power distribution center. (Scheme 130) Using voltmeter, check voltage at cavity "A" (White/Black wire) for A/C clutch relay in power distribution center. (Scheme 130)
7. If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, repair open circuit in White/Black wire to A/C clutch relay. White/Black wire goes from A/C clutch relay in power distribution center to Positive Temperature Coefficient (PTC) No. 1 in junction block, located behind driver's side of instrument panel, to the left of steering column. The PTC receives voltage when ignition is on. Once open circuit is repaired, perform TEST VER-2A. NOTE: The PTC is a specified amperage solid-state circuit breaker located in junction box. The PTC may reset when all current is removed from PTC for approximately 20 seconds.
8. Using ohmmeter, check resistance between terminals No. 85 and 86 on A/C clutch relay. (Scheme 130) (Scheme 131): Identifying A/C Clutch Relay Terminals
9. If resistance is less than 100 ohms, go to next step. If resistance is 100 ohms or more, replace A/C clutch relay. Perform TEST VER-2A.
10. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
11. Using ohmmeter, check resistance between ground and PCM connector terminal No. 64 (Dark Blue/Orange wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Dark Blue/Orange wire between PCM and A/C clutch relay. Perform TEST VER-2A.
12. Using ohmmeter, check resistance between cavity "C" (Dark Blue/Orange wire) for A/C clutch relay in power distribution center and PCM connector terminal No. 64 (Dark Blue/Orange wire). (Scheme 130)
13. If resistance is 5 ohms or more, repair open circuit in Dark Blue/Orange wire between PCM and power distribution center. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-17A - EGR SOLENOID CIRCUIT

Note. Test applies only to 3.3L (gasoline). For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Using scan tool, actuate EGR solenoid.
2. Using scan tool, check for stored DTCs. If DTC is set to indicate EGR solenoid circuit, go to step 8). If no DTC is set to indicate EGR solenoid circuit, go to next step.
3. Conditions required to set DTC are not present at this time. EGR solenoid is actuated by PCM when engine is at normal operating temperature, throttle position sensor is in other than idle or full throttle position, and MAP sensor is at the center of the operating range. DTC may be stored in PCM if an open or shorted circuit exists in the EGR solenoid and EGR solenoid does not operate when activated by the PCM. Possible causes are: open or shorted solenoid control circuit, open fused ignition switch output circuit, open or shorted EGR solenoid, defective PCM, defective connector terminals or wiring. Go to next step.
4. Check for defective wiring or connections at EGR solenoid, PCM and fused ignition switch wiring to EGR solenoid. The EGR solenoid is located on top of EGR backpressure transducer and contains vacuum hose to EGR valve. The PCM is located between driver's side front fender and power distribution center, near battery. NOTE: Fused ignition switch output circuit supplies voltage to EGR solenoid from ignition switch, through Positive Temperature Coefficient (PTC) No. 1 to power distribution center, and then to EGR solenoid on the White/Black wire. The PTC is a specified amperage solid-state circuit breaker which may reset when all current is removed from PTC for approximately 20 seconds. The PTC No. 1 is located in junction block behind driver's side of instrument panel, to the left of steering column. PTC receives voltage when ignition is on.
5. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, go to next step.
6. Using scan tool, check for DTCs with EGR solenoid still actuated while wiggling wiring harness from EGR solenoid to PCM. Note if DTC for EGR solenoid circuit is set.
7. If DTC for EGR solenoid circuit is set while wiggling wiring harness, repair wiring harness as necessary. Perform TEST VER-2A. If no DTC for EGR solenoid circuit was set while wiggling wiring harness, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
8. Ensure ignition is off. Disconnect connector at EGR solenoid. The EGR solenoid contains a 2-pin connector and is located on top of EGR backpressure transducer and contains vacuum hose to EGR valve.
9. Turn ignition on. Using voltmeter, check voltage at terminal No. 2 (White/Black wire) on EGR solenoid connector.
10. If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, repair open circuit in the White/Black wire to EGR solenoid. White/Black wire supplies voltage to EGR solenoid from ignition switch, through Positive Temperature Coefficient (PTC) No. 1 to power distribution center, and then to EGR solenoid. The PTC is a specified amperage solid-state circuit breaker which may reset when all current is removed from PTC for approximately 20 seconds. The PTC No. 1 is located in junction block behind driver's side of instrument panel, to the left of steering column. The PTC receives voltage when ignition is on. Once open circuit is repaired, perform TEST VER-2A.
11. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
12. Using ohmmeter, check resistance between terminal No. 1 (Gray/Yellow wire) on connector for EGR solenoid and PCM connector terminal No. 40 (Gray/Yellow wire).
13. If resistance is 5 ohms or more, repair open circuit in Gray/Yellow wire between PCM and EGR solenoid. Perform TEST VER-2A. If resistance is less than 5 ohms, use ohmmeter to check resistance between ground and terminal No. 1 (Gray/Yellow wire) on connector for EGR solenoid.
14. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Gray/Yellow wire between PCM and EGR solenoid. Perform TEST VER-2A.
15. Reinstall connector on EGR solenoid. Turn ignition on. Using voltmeter, check voltage at PCM connector terminal No. 40 (Gray/Yellow wire).
16. If voltage is 10 volts or less, replace EGR solenoid. Perform TEST VER-2A. If voltage is more than 10 volts, replace PCM. Perform TEST VER-2A.

TEST TC-18A - EVAP PURGE SOLENOID CIRCUIT

Note. Test does not apply to 3.3L Compressed Natural Gas (CNG). EVAP purge solenoid may be referred to as EVAP solenoid. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Scheme 132

1. Using scan tool, clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Using scan tool, actuate EVAP purge solenoid.
2. Using scan tool, check for DTCs. If DTC is set to indicate EVAP purge solenoid circuit, go to step 8). If no DTC is set to indicate EVAP purge solenoid circuit, go to next step.
3. Conditions required to set DTC are not present at this time. DTC may be stored in PCM if the actual state of EVAP purge solenoid operation does not match the intended state. Possible causes are: open or shorted control circuit, open fused ignition switch output circuit, open or shorted EVAP purge solenoid control coil, defective PCM, defective connector terminals or wiring. Go to next step.
4. Check for defective wiring or connections at EVAP purge solenoid, PCM and fused ignition switch wiring to EVAP purge solenoid. The EVAP purge solenoid is located near passenger's side strut tower. (Scheme 130) The PCM is located between driver's side front fender and power distribution center, near battery. (Scheme 132): Locating EVAP Purge Solenoid NOTE: Fused ignition switch wiring supplies voltage to EVAP solenoid from ignition switch, through Positive Temperature Coefficient (PTC) No. 1 to power distribution center, and then to EGR solenoid on the White/Black wire. The PTC is a specified amperage solid-state circuit breaker which may reset when all current is removed from PTC for approximately 20 seconds. The PTC No. 1 is located in junction block behind driver's side of instrument panel, to the left of steering column. The PTC receives voltage when ignition is on.
5. If defective wiring or connections exist, repair as necessary. Perform TEST VER-5A. If no defective wiring or connections exist, go to next step.
6. Using scan tool, check for DTCs with EVAP purge solenoid still actuated while wiggling wiring harness from EVAP purge solenoid to PCM. Note if DTC for EVAP purge solenoid circuit is set.
7. If DTC for EVAP purge solenoid circuit is set while wiggling wiring harness, repair wiring harness as necessary. Perform TEST VER-5A. If no DTC was set for EVAP purge solenoid circuit while wiggling wiring harness, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-5A.
8. Ensure ignition is off. Disconnect connector at EVAP purge solenoid, located near passenger's side strut tower. (Scheme 132)
9. Turn ignition on. Using voltmeter, check voltage at terminal No. 2 (White/Black wire) on connector for EVAP purge solenoid.
10. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in White/Black wire. White/Black wire supplies voltage to EVAP purge solenoid from ignition switch, through Positive Temperature Coefficient (PTC) No. 1 to power distribution center, and then to EVAP purge solenoid. The PTC is a specified amperage solid-state circuit breaker which may reset when all current is removed from PTC for approximately 20 seconds. The PTC No. 1 is located in junction block behind driver's side of instrument panel, to the left of steering column. The PTC receives voltage when ignition is on. Once open circuit is repaired, perform TEST VER-5A.
11. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
12. Using ohmmeter, check resistance between terminal No. 1 (Pink/Black wire) on connector for EVAP purge solenoid and PCM connector terminal No. 68 (Pink/Black wire).
13. If resistance is 5 ohms or more, repair open circuit in Pink/Black wire between PCM and EVAP purge solenoid. Perform TEST VER-5A. If resistance is less than 5 ohms, go to next step.
14. Using ohmmeter, check resistance between ground and at terminal No. 1 (Pink/Black wire) on connector for EVAP purge solenoid.
15. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Pink/Black wire between PCM and EVAP purge solenoid. Perform TEST VER-5A.
16. Reinstall connector on EVAP purge solenoid. Turn ignition on. Using voltmeter, check voltage at PCM connector terminal No. 68 (Pink/Black wire).
17. If voltage is 10 volts or less, replace EVAP purge solenoid. Perform TEST VER-5A. If voltage is more than 10 volts, replace PCM. Perform TEST VER-5A.

TEST TC-19A - INJECTOR NO. 3 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. On 3.3L Compressed Natural Gas (CNG), perform TEST TC-19D. On 3.3L (gasoline), ensure ignition is off. Disconnect connector at injector No. 3. NOTE: Injector No. 3 is the second injector back from front (timing chain end) of engine on left side when viewed from flywheel end of engine. This injector is located above cylinder No. 4, but delivers fuel to cylinder No. 3, due to crossflow intake manifold.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 3. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, replace injector. Perform TEST VER-2A.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 3.
4. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire between injector No. 3 and ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
5. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
6. Using ohmmeter, check resistance between ground and PCM connector terminal No. 7 (Yellow/White wire). If resistance is less than 5 ohms, repair short to ground in Yellow/White wire between PCM and injector No. 3. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
7. Using ohmmeter, check resistance between terminal No. 2 (Yellow/White wire) on connector for injector No. 3 and PCM connector terminal No. 7 (Yellow/White wire). If resistance is 5 ohms or more, repair open circuit in Yellow/White wire between PCM and injector No. 3. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-19C - INJECTOR NO. 3 CONTROL CIRCUIT

Note. Perform TEST TC-19A before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector at injector No. 3. Injector No. 3 is second injector back from front (timing belt end) of engine on right side when viewed from flywheel end of engine. It may be necessary to remove air intake plenum for access to connector at injector No. 3.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 3. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, replace injector. Perform TEST VER-2A.
3. Using ohmmeter, check resistance between terminal No. 1 (Yellow/White wire) on connector for injector No. 3 and Yellow/White wire on injector side (female side) of injector wiring harness. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Yellow/White wire between connector for No. 3 injector and injector side of injector wiring harness. Perform TEST VER-2A.
4. Using ohmmeter, check resistance between ground and Yellow/White wire on injector side (female side) of injector wiring harness. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on Yellow/White wire. Perform TEST VER-2A.
5. Reconnect injector wiring harness connector. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 2 (Dark Green/Orange wire) on connector for injector No. 3.
6. If voltage cycles from high voltage to low voltage, replace Powertrain Control Module (PCM). Perform TEST VER-2A. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.

TEST TC-19D - INJECTOR NO. 3 CONTROL CIRCUIT

Note. Perform TEST TC-19A before proceeding. Test applies only to 3.3L Compressed Natural Gas (CNG). For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector at injector No. 3. Injector No. 3 is the second injector back from front (timing chain end) of engine on left side when viewed from flywheel end of engine. This injector is located above cylinder No. 4, but delivers fuel to cylinder No. 3, due to crossflow intake manifold.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 3. If resistance is 3-6 ohms, go to next step. If resistance is not 3-6 ohms, replace injector. Perform TEST VER-2A.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 3.
4. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire between injector No. 3 and ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. NOTE: On 3.3L Compressed Natural Gas (CNG), Auto Shutdown (ASD) relay may be referred to as the low pressure shutoff relay.
5. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
6. Using ohmmeter, check resistance between ground and PCM connector terminal No. 7 (Yellow/White wire). If resistance is less than 5 ohms, repair short to ground in Yellow/White wire between PCM and injector No. 3. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
7. Using ohmmeter, check resistance between terminal No. 2 (Yellow/White wire) on connector for injector No. 3 and PCM connector terminal No. 7 (Yellow/White wire). If resistance is 5 ohms or more, repair open circuit in Yellow/White wire between PCM and injector No. 3. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-20A - INJECTOR NO. 2 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Perform TEST TC-20B.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 2. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, replace injector. Perform TEST VER-2A.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 2 (Dark Green/Orange wire) on connector for injector No. 2.
4. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire between injector No. 2 and ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
5. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
6. Using ohmmeter, check resistance between ground and PCM connector terminal No. 17 (Tan wire). If resistance is less than 5 ohms, repair short to ground in Tan wire between PCM and injector No. 2. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
7. Using ohmmeter, check resistance between terminal No. 1 (Tan wire) on connector for injector No. 2 and PCM connector terminal No. 17 (Tan wire). If resistance is 5 ohms or more, repair open circuit in Tan wire between PCM and injector No. 2. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-20B - INJECTOR NO. 2 CONTROL CIRCUIT

Note. Perform TEST TC-20A before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. On 3.3L Compressed Natural Gas (CNG), perform TEST TC-20D. On 3.3L (gasoline), ensure ignition is off. Disconnect connectors at injector wiring harness. Injector wiring harness is located at end of valve cover, near transaxle oil dipstick tube. Note which side of injector wiring harness connector goes to the injectors and which side goes to the Powertrain Control Module (PCM). NOTE: Injector side of injector wiring harness is the male side of injector wiring harness. The PCM side of injector wiring harness side is the female side of the injector wiring harness. Injector side of injector wiring harness slides into the PCM side of injector wiring harness.
2. Using ohmmeter, check resistance between terminals No. 1 (Dark Green/Orange wire) and No. 4 (Tan wire) on injector side (male side) of injector wiring harness. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, perform TEST TC-20C.
3. Using ohmmeter, check resistance between ground and terminal No. 4 (Tan wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, repair short to ground on Tan wire to injector No. 2. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
4. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on PCM side (female side) of injector wiring harness.
5. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire between injector No. 2 and ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
6. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
7. Using ohmmeter, check resistance between ground and PCM connector terminal No. 17 (Tan wire). If resistance is less than 5 ohms, repair short to ground in Tan wire between PCM and injector No. 2. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
8. Using ohmmeter, check resistance between terminal No. 4 (Tan wire) on PCM side (female side) of injector wiring harness and PCM connector terminal No. 17 (Tan wire). If resistance is 5 ohms or more, repair open circuit in Tan wire between PCM and injector No. 2. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-20C - INJECTOR NO. 2 CONTROL CIRCUIT

Note. Perform TEST TC-20A before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector at injector No. 2. Injector No. 2 is first injector back from front (timing chain end) of engine on right side when viewed from flywheel end of engine. This injector is located above cylinder No. 1, but delivers fuel to cylinder No. 2, due to crossflow intake manifold. It may be necessary to remove air intake plenum for access to connector at injector No. 2.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 2. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, replace injector. Perform TEST VER-2A.
3. Using ohmmeter, check resistance between terminal No. 2 (Tan wire) on connector for injector No. 2 and terminal No. 4 (Tan wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Tan wire. Perform TEST VER-2A.
4. Using ohmmeter, check resistance between ground and terminal No. 4 (Tan Wire) on injector side (male side) of injector wiring harness. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on Tan wire to injector No. 2. Perform TEST VER-2A.
5. Reconnect injector wiring harness connectors. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay.
6. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 2. If voltage cycles from high voltage to low voltage, replace Powertrain Control Module (PCM). Perform TEST VER-2A. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire between injector No. 2 and Auto Shutdown (ASD) relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.

TEST TC-20D - INJECTOR NO. 2 CONTROL CIRCUIT

Note. Perform TEST TC-20A before proceeding. Test applies only to 3.3L Compressed Natural Gas (CNG). For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connectors at injector wiring harness. Injector wiring harness is located at end of valve cover, near transaxle oil dipstick tube. Note which side of injector wiring harness connector goes to the injectors and which side goes to the Powertrain Control Module (PCM). NOTE: Injector side of injector wiring harness is the male side of injector wiring harness. The PCM side of injector wiring harness side is the female side of the injector wiring harness. Injector side of injector wiring harness slides into the PCM side of injector wiring harness.
2. Using ohmmeter, check resistance between terminals No. 1 (Dark Green/Orange wire) and No. 4 (Tan wire) on injector side (male side) of injector wiring harness. If resistance is 3-6 ohms, go to next step. If resistance is not 3-6 ohms, perform TEST TC-20E.
3. Using ohmmeter, check resistance between ground and terminal No. 4 (Tan wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, repair short to ground on Tan wire to injector No. 2. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
4. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on PCM side (female side) of injector wiring harness.
5. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire between injector No. 2 and Auto Shutdown (ASD) relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
6. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
7. Using ohmmeter, check resistance between ground and PCM connector terminal No. 17 (Tan wire). If resistance is less than 5 ohms, repair short to ground in Tan wire between PCM and injector No. 2. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
8. Using ohmmeter, check resistance between terminal No. 4 (Tan wire) on PCM side (female side) of injector wiring harness and PCM connector terminal No. 17 (Tan wire). If resistance is 5 ohms or more, repair open circuit in Tan wire between PCM and injector No. 2. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-20E - INJECTOR NO. 2 CONTROL CIRCUIT

Note. Perform TEST TC-20A before proceeding. Test applies only to 3.3L Compressed Natural Gas (CNG). For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector at injector No. 2. Injector No. 2 is first injector back from front (timing chain end) of engine on right side when viewed from flywheel end of engine. This injector is located above cylinder No. 1, but delivers fuel to cylinder No. 2, due to crossflow intake manifold. It may be necessary to remove air intake plenum for access to connector at injector No. 2.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 2. If resistance is 3-6 ohms, go to next step. If resistance is not 3-6 ohms, replace injector. Perform TEST VER-2A.
3. Using ohmmeter, check resistance between terminal No. 2 (Tan wire) on connector for injector No. 2 and terminal No. 4 (Tan wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Tan wire. Perform TEST VER-2A.
4. Using ohmmeter, check resistance between ground and terminal No. 4 (Tan wire) on injector side (male side) of injector wiring harness. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on Tan wire to injector No. 2. Perform TEST VER-2A.
5. Reconnect injector wiring harness connectors. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 2.
6. If voltage cycles from high voltage to low voltage, replace Powertrain Control Module (PCM). Perform TEST VER-2A. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire between injector No. 2 and ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.

TEST TC-21A - INJECTOR CONTROL CIRCUIT

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Start engine and allow engine to idle for at least 20 seconds. Shut engine off. Turn ignition on. DO NOT start engine.
2. Using scan tool, read DTC message. If scan tool displays INJECTOR CONTROL CIRCUIT with a start run count of zero, go to step 7). If scan tool does not display INJECTOR CONTROL CIRCUIT with a start run count of zero, go to next step.
3. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) if no inductive activation is sensed after injector turns off, and with no other injectors on. Possible causes are: open or shorted injector driver circuit, open circuit in injector, open Auto Shutdown (ASD) relay supply circuit at injector, defective PCM, defective connector terminals or wiring. Go to next step.
4. Check for defective wiring or connections at injectors, ASD relay and PCM. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. The PCM is located between driver's side front fender and power distribution center, near battery.
5. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no possible causes are found, go to next step.
6. Start engine. Wiggle wiring harness from injectors to PCM. If engine misfires or stalls while wiggling wiring harness, repair wiring harness as necessary. Perform TEST VER-2A. If engine does not misfire or stall while wiggling wiring harness, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
7. Perform correct test by noting scan tool display. See INJECTOR CONTROL CIRCUIT TESTS table.

INJECTOR CONTROL CIRCUIT TESTS

TEST TC-21B - INJECTOR NO. 1 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. On 3.3L Compressed Natural Gas (CNG), perform TEST TC-21E. On 3.3L (gasoline), ensure ignition is off. Disconnect connector at injector No. 1. NOTE: Injector No. 1 is first injector back from front (timing chain end) of engine on left side when viewed from flywheel end of engine. This injector is located above cylinder No. 2, but delivers fuel to cylinder No. 1, due to crossflow intake manifold.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 1. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, replace injector. Perform TEST VER-2A.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 1.
4. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire between injector No. 1 and ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
5. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
6. Using ohmmeter, check resistance between ground and PCM connector terminal No. 13 (White/Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in White/Dark Blue wire between PCM and injector No. 1. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
7. Using ohmmeter, check resistance between terminal No. 2 (White/Dark Blue wire) on connector for injector No. 1 and PCM connector terminal No. 13 (White/Dark Blue wire). If resistance is 5 ohms or more, repair open circuit in White/Dark Blue wire between PCM and injector No. 1. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-21E - INJECTOR NO. 1 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding. Test applies only to 3.3L Compressed Natural Gas (CNG). For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector at injector No. 1. Injector No. 1 is first injector back from front (timing chain end) of engine on left side when viewed from flywheel end of engine. This injector is located above cylinder No. 2, but delivers fuel to cylinder No. 1, due to crossflow intake manifold.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 1. If resistance is 3-6 ohms, go to next step. If resistance is not 3-6 ohms, replace injector. Perform TEST VER-2A.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 1.
4. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire between injector No. 1 and ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
5. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
6. Using ohmmeter, check resistance between ground and PCM connector terminal No. 13 (White/Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in White/Dark Blue wire between PCM and injector No. 1. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
7. Using ohmmeter, check resistance between terminal No. 2 (White/Dark Blue wire) on connector for injector No. 1 and PCM connector terminal No. 13 (White/Dark Blue wire). If resistance is 5 ohms or more, repair open circuit in White/Dark Blue wire between PCM and injector No. 1. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-25A - IDLE AIR CONTROL MOTOR CIRCUITS

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Start engine and allow engine to warm to normal operating temperature. Turn ignition off. Ensure ignition is off for at least 10 seconds. Start engine and allow engine to idle. Ensure engine is at normal operating temperature.
2. Using scan tool, actuate idle air control motor to 1400 RPM. Note if engine speed is 1300-1500 RPM. If engine speed is not within specification, go to step 10). If engine speed is within specification, go to next step.
3. Using scan tool, actuate idle air control motor to 900 RPM. Note if engine speed is 800-1000 RPM. If engine speed is not within specification, go to step 10). If engine speed is within specification, go to next step.
4. Actuate STOP ALL TESTS in SYSTEM TESTS on scan tool. Perform IAC WIGGLE test. Idle speed should increase and then decrease in accordance with display on scan tool if idle air control motor is operating correctly. If idle air control motor is operates correctly, go to next step. If idle air control motor is not operating correctly, go to step 10).
5. Wiggle wiring harness from idle air control motor to the Powertrain Control Module (PCM) while observing operation of idle air control motor. Idle air control motor is mounted on the throttle body and contains a 4-pin connector. The PCM is located between driver's side front fender and power distribution center, near battery.
6. If idle air control motor does not stop operating while wiggling wiring harness, go to next step. If idle air control motor stops operating at any time while wiggling wiring harness, repair wiring harness and connectors as necessary. Perform TEST VER-2A.
7. Stop IAC WIGGLE test. Turn engine off. Check for defective wiring or connections at idle air control motor and PCM. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, go to next step.
8. Conditions required to set DTC are not present at this time. The PCM uses idle air control motor for controlling idle speed. Idle air control motor controls the amount of air by-passing the throttle blade. DTC may be stored in PCM if PCM senses a short to ground or battery voltage on any of the 4 idle air control motor circuits while idle air control motor is operating.
9. Possible causes are: driver circuit shorted to ground or battery voltage, driver circuits shorted together, defective PCM, shorted idle air control motor, defective connector terminals or wiring. Check for intermittent problem. See INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
10. Using scan tester, stop all tests. With engine idling, disconnector at connector at idle air control motor. Idle air control motor is mounted on the throttle body and contains a 4-pin connector.
11. Using voltmeter, check voltage at terminal No. 4 (Gray/Red wire) on connector for idle air control motor. If voltage is not more than 5 volts at anytime, perform TEST TC-25B. If voltage is more than 5 volts at anytime, go to next step.
12. Using voltmeter, check voltage at terminal No. 3 (Yellow/Black wire) on connector for idle air control motor. If voltage is not more than 5 volts at any time, perform TEST TC-25C. If voltage is more than 5 volts at any time, go to next step.
13. Using voltmeter, check voltage at terminal No. 2 (Brown/White wire) on connector for idle air control motor. If voltage is not more than 5 volts at any time, perform TEST TC-25D. If voltage is more than 5 volts at any time, go to next step.
14. Using voltmeter, check voltage at terminal No. 1 (Violet/Black wire) on connector for idle air control motor. If voltage is not more than 5 volts at any time, perform TEST TC-25E. If voltage is more than 5 volts at any time, go to next step.
15. Turn ignition off. Using ohmmeter, check resistance between ground and terminal No. 4 (Gray/Red wire) on connector for idle air control motor. If resistance is less than 5 ohms, repair short to ground in Gray/Red wire between PCM and idle air control motor. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
16. Using ohmmeter, check resistance between ground and terminal No. 3 (Yellow/Black wire) on connector for idle air control motor. If resistance is less than 5 ohms, repair short to ground in Yellow/Black wire between PCM and idle air control motor. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
17. Using ohmmeter, check resistance between ground and terminal No. 2 (Brown/White wire) on connector for idle air control motor connector. If resistance is less than 5 ohms, repair short to ground in Brown/White wire between PCM and idle air control motor. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
18. Using ohmmeter, check resistance between ground and terminal No. 1 (Violet/Black wire) on connector for idle air control motor. If resistance is less than 5 ohms, repair short to ground in Violet/Black wire between PCM and idle air control motor. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
19. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
20. Check connectors for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connectors as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
21. Using ohmmeter, check resistance between terminal No. 4 (Gray/Red wire) on connector for idle air control motor and each remaining terminal on the connector. This checks for a short between idle air control motor driver circuits.
22. If resistance is less than 5 ohms on any idle air control motor driver circuit, repair driver circuits that are shorted together. Perform TEST VER-2A. If resistance is 5 ohms or more on all idle air control motor driver circuits, go to next step.
23. Using ohmmeter, check resistance between terminal No. 3 (Yellow/Black wire) and terminals No. 2 (Brown/White wire) and No. 1 (Violet/Black wire) on connector for idle air control motor. If resistance is less than 5 ohms on any idle air control motor driver circuit, repair driver circuits that are shorted together. Perform TEST VER-2A. If resistance is 5 ohms or more on idle air control motor driver circuits, go to next step.
24. Using ohmmeter, check resistance between terminals No. 2 (Brown/White wire) and No. 1 (Violet/Black wire) on connector for idle air control motor. If resistance is less than 5 ohms on idle air control motor driver circuit, repair the shorted together idle air control motor driver circuit. Perform TEST VER-2A. If resistance is 5 ohms or more on idle air control motor driver circuit, replace idle air control motor. Perform TEST VER-2A.

TEST TC-25B - IDLE AIR CONTROL MOTOR CIRCUITS

Note. Perform TEST TC-25A before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
2. Check connectors for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connectors as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
3. Using ohmmeter, check resistance between terminal No. 4 (Gray/Red wire) on connector for idle air control motor and PCM connector terminal No. 57 (Gray/Red wire). If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Gray/Red wire between PCM and idle air control motor. Perform TEST VER-2A.

TEST TC-25C - IDLE AIR CONTROL MOTOR CIRCUITS

Note. Perform TEST TC-25A before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
2. Check connectors for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connectors as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
3. Using ohmmeter, check resistance between terminal No. 3 (Yellow/Black wire) on connector for idle air control motor and PCM connector terminal No. 49 (Yellow/Black wire). If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Yellow/Black wire between PCM and idle air control motor. Perform TEST VER-2A.

TEST TC-25D - IDLE AIR CONTROL MOTOR CIRCUITS

Note. Perform TEST TC-25A before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
2. Check connectors for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connectors as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
3. Using ohmmeter, check resistance between terminal No. 2 (Brown/White wire) on connector for idle air control motor and PCM connector terminal No. 48 (Brown/White wire). If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Brown/White wire between PCM and idle air control motor. Perform TEST VER-2A.

TEST TC-25E - IDLE AIR CONTROL MOTOR CIRCUITS

Note. Perform TEST TC-25A before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
2. Check connectors for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connectors as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
3. Using ohmmeter, check resistance between terminal No. 1 (Violet/Black wire) on connector for idle air control motor and PCM connector terminal No. 58 (Violet/Black wire). If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Violet/Black wire between PCM and idle air control motor. Perform TEST VER-2A.

TEST TC-26A - THROTTLE POSITION SENSOR VOLTAGE LOW

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Scheme 133

1. Turn ignition on with engine off. Using scan tool, read throttle position sensor voltage. If voltage is less than.2 volt, go to step 6). If voltage is.2 volt or more, go to next step.
2. While monitoring throttle position sensor voltage, slowly open and close the throttle. If voltage does not change smoothly, replace throttle position sensor. Perform TEST VER-2A. If voltage changes smoothly, go to next step.
3. With throttle at closed position, wiggle wiring harness and connector going to throttle position sensor on throttle body while monitoring the voltage. If voltage changes while wiggling wiring harness, repair wiring harness or connector as necessary. Perform TEST VER-2A. If voltage does not change while wiggling wiring harness, go to next step.
4. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) if throttle position sensor voltage at PCM terminal No. 35 is less than.15 volt. Possible causes are: sensor signal shorted to ground, defective throttle position sensor, loss of 5-volt supply, defective PCM, defective connector terminals or wiring. Go to next step.
5. Check for defective wiring or connections at throttle position sensor and PCM. The PCM is located between driver's side front fender and power distribution center, near battery. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
6. Disconnect connector at throttle position sensor on throttle body. Using voltmeter, check voltage at Violet/White wire on connector for throttle position sensor. If voltage is 4 volts or more, go to next step. If voltage is less than 4 volts, repair open circuit in Violet/White wire between PCM and throttle position sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
7. Using scan tool, read throttle position sensor voltage. If voltage is more than one volt, replace throttle position sensor. Perform TEST VER-2A. If voltage is one volt or less, go to next step.
8. On models with electronically controlled 4-speed AUTOMATIC TRANSMISSION, go to next step. On all other models, go to step 11).
9. On models with electronically controlled 4-speed AUTOMATIC TRANSMISSION, turn ignition off. Disconnect 60-pin connector from Transmission Control Module (TCM). The TCM is located on passenger's side front corner of engine compartment, on inner fender, near windshield washer reservoir. (Scheme 133) (Scheme 133): Locating Transmission Control Module (TCM)
10. Turn ignition on. Using scan tool, read throttle position sensor voltage. If voltage is more than one volt, replace TCM. Perform TEST VER-2A. If voltage is one volt or less, go to next step.
11. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
12. Using ohmmeter, check resistance between ground and Orange/Dark Blue wire on connector for throttle position sensor. If resistance is less than 5 ohms, repair short to ground in Orange/Dark Blue wire between PCM and throttle position sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
13. Using ohmmeter, check resistance between Orange/Dark Blue wire and Black/Light Blue wire on connector for throttle position sensor. If resistance is less than 5 ohms, repair Orange/Dark Blue wire and Black/Light Blue wire circuits, as they are shorted together. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A.

TEST TC-27A - THROTTLE POSITION SENSOR VOLTAGE HIGH

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Turn ignition on with engine off. Using scan tool, read throttle position sensor voltage. If voltage is more than 4.5 volts, go to step 6). If voltage is 4.5 volts or less, go to next step.
2. While monitoring throttle position sensor voltage, slowly open and close the throttle. If voltage does not change smoothly, replace throttle position sensor. Perform TEST VER-2A. If voltage changes smoothly, go to next step.
3. With throttle at closed position, wiggle wiring harness and connector going to throttle position sensor on throttle body while monitoring the voltage. If voltage changes while wiggling wiring harness, repair wiring harness or connector as necessary. Perform TEST VER-2A. If voltage does not change while wiggling wiring harness, go to next step.
4. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) if throttle position sensor voltage at PCM terminal No. 35 is more than 4.5 volts. Possible causes are: sensor signal circuit open, defective throttle position sensor, sensor ground circuit open, defective PCM, defective connector terminals or wiring. Go to next step.
5. Check for defective wiring or connections at throttle position sensor and PCM. The PCM is located between driver's side front fender and power distribution center, near battery. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
6. Disconnect connector at throttle position sensor on throttle body. Install jumper wire between Orange/Dark Blue wire and Black/Light Blue wire on connector for throttle position sensor. Using scan tool, read throttle position sensor voltage.
7. If scan tool displays a voltage of one volt or more, go to next step. If scan tool displays a voltage of less than one volt, replace throttle position sensor. Perform TEST VER-2A.
8. Remove jumper wire. Reconnect jumper wire between Orange/Dark Blue wire on connector for throttle position sensor and engine ground. Using scan tool, read throttle position sensor voltage.
9. If voltage is less than one volt, repair open circuit in Black/Light Blue wire (sensor ground). Perform TEST VER-2A. If voltage is one volt or more, go to next step.
10. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
11. Using ohmmeter, check resistance between Orange/Dark Blue on connector for throttle position sensor and PCM connector terminal No. 35 (Orange/Dark Blue wire). If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
12. Using ohmmeter, check resistance between Orange/Dark Blue wire and Violet/White wire on connector for throttle position sensor. If resistance is less than 5 ohms, repair Orange/Dark Blue wire and Violet/White wire circuits, as they are shorted together. If resistance is 5 ohms or more, repair open circuit on Orange/Dark Blue wire. Perform TEST VER-2A.

TEST TC-30A - ENGINE COOLANT TEMP. (ECT) SENSOR VOLTAGE TOO LOW

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, read ECT voltage. If ECT voltage is less than .5 volt, go to step 7). If ECT voltage is .5 volt or more, go to next step.
2. Wiggle wiring harness and connector going to engine coolant temperature sensor while monitoring ECT voltage. Engine coolant temperature sensor is located near thermostat housing and contains a Black/Light Blue wire and Tan/Black wire in the connector.
3. If ECT voltage changes while wiggling wiring harness, repair wiring harness or connector as necessary. Perform TEST VER-2A. If ECT voltage does not change while wiggling wiring harness, go to next step.
4. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) if ECT voltage at PCM terminal No. 26 is less than .5 volt for more than 3 seconds. Possible causes are: sensor signal shorted to ground, sensor internally grounded, defective PCM, defective connector terminals or wiring. Go to next step.
5. Check for defective wiring or connections at engine coolant temperature sensor and PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
6. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
7. Disconnect connector at engine coolant temperature sensor. Engine coolant temperature sensor is located near thermostat housing and contains a Black/Light Blue wire and Tan/Black wire in the connector.
8. Using scan tool, read ECT voltage. If ECT voltage is more than 4 volts, replace engine coolant temperature sensor. Perform TEST VER-2A. If ECT voltage is 4 volts or less, go to next step.
9. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
10. Using ohmmeter, check resistance between ground and Tan/Black wire on connector for engine coolant temperature sensor. If resistance is less than 5 ohms, repair short to ground in Tan/Black wire between PCM and engine coolant temperature sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
11. Using ohmmeter, check resistance between Tan/Black wire and Black/Light Blue wire on connector for engine coolant temperature sensor. If resistance is less than 5 ohms, repair short circuit between Tan/Black and Black/Light Blue wires between PCM and engine coolant temperature sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A.

TEST TC-31A - ENGINE COOLANT TEMP. (ECT) SENSOR VOLTAGE TOO HIGH

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, read ECT voltage. If ECT voltage is more than 4.9 volts, go to step 7). If ECT voltage is 4.9 volts or less, go to next step.
2. Wiggle wiring harness and connector going to engine coolant temperature sensor while monitoring ECT voltage. Engine coolant temperature sensor is located near thermostat housing and contains a Black/Light Blue wire and a Tan/Black wire in the connector.
3. If ECT voltage changes while wiggling wiring harness, repair wiring harness or connector as necessary. Perform TEST VER-2A. If ECT voltage does not change while wiggling wiring harness, go to next step.
4. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) if ECT voltage at PCM terminal No. 26 is more than 4.9 volts for more than 3 seconds. Possible causes are: sensor signal circuit open, sensor internally open, sensor ground circuit open, defective PCM, defective connector terminals or wiring. Go to next step.
5. Check for defective wiring or connections at engine coolant temperature sensor and PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
6. If defective wiring or connections exist, repair as necessary. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
7. Disconnect connector at engine coolant temperature sensor. Engine coolant temperature sensor is located near thermostat housing and contains a Black/Light Blue wire and a Tan/Black wire in the connector.
8. Connect jumper wire between Black/Light Blue wire and Tan/Black wire in the connector for engine coolant temperature sensor. Using scan tool, read ECT voltage.
9. If ECT voltage is less than one volt, replace engine coolant temperature sensor. Perform TEST VER-2A. If ECT voltage is one volt or more, go to next step.
10. Remove jumper wire from connector. Reconnect jumper wire between Tan/Black wire in the connector for engine coolant temperature sensor and engine ground. Using scan tool, read engine coolant temperature sensor (ECT) voltage.
11. If ECT voltage is less than one volt, repair open circuit in Black/Light Blue wire (sensor ground). Perform TEST VER-2A. If ECT voltage is one volt or more, go to next step.
12. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
13. Using ohmmeter, check resistance between Tan/Black wire on connector for engine coolant temperature sensor and PCM connector terminal No. 26 (Tan/Black wire). If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Tan/Black wire between PCM and engine coolant temperature sensor. Perform TEST VER-2A.

TEST TC-32A - UPSTREAM O2 SENSOR STAYS AT CENTER

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Start engine and warm engine to normal operating temperature. Using scan tool, set engine speed at 1500 RPM. Using scan tool, read upstream oxygen sensor state.
2. If upstream oxygen sensor state does not switch, go to step 7). If upstream oxygen sensor state switches, go to next step.
3. Wiggle wiring harness and connector at upstream oxygen sensor while monitoring upstream oxygen sensor state. Upstream oxygen sensor is mounted on exhaust manifold.
4. If upstream oxygen sensor state becomes locked at the center while wiggling wiring harness, repair open circuit in wiring harness or connector as necessary. Perform TEST VER-5A. If upstream oxygen sensor state does not become locked at center while wiggling wiring harness, go to next step.
5. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) if upstream oxygen sensor voltage is between .35 volt and .55 volt for 1.5 minutes. Possible causes are: sensor signal circuit open, defective upstream oxygen sensor, defective PCM, dirt/moisture or grease causing voltage tracking in connector, defective connector terminals or wiring. Go to next step.
6. Check for defective wiring or connections at upstream oxygen sensor and PCM. The PCM is located between driver's side front fender and power distribution center, near battery. If defective wiring or connections exist, repair as necessary. Perform TEST VER-5A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-5A.
7. Turn ignition on with engine off. Disconnect connector at upstream oxygen sensor mounted on exhaust manifold. Using ohmmeter, check resistance between ground and terminal No. 3 (Black/Light Blue wire) on wiring harness side of connector for upstream oxygen sensor.
8. If resistance is more than 5 ohms, repair open circuit in Black/Light Blue wire and ground. Perform TEST VER-5A. If resistance is 5 ohms or less, go to next step.
9. Connect jumper wire between terminal No. 4 (Black/Dark Green wire) on wiring harness side of connector for upstream oxygen sensor and positive battery terminal. Using scan tool, read upstream oxygen sensor voltage.
10. If upstream oxygen sensor voltage is more than one volt, replace upstream oxygen sensor. Perform TEST VER-5A. If upstream oxygen sensor voltage is one volt or less, go to next step.
11. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
12. Disconnect jumper wire from wiring harness side of connector for upstream oxygen sensor and positive battery terminal. Using ohmmeter, check resistance between terminal No. 4 (Black/Dark Green wire) on wiring harness side of connector for upstream oxygen sensor and PCM connector terminal No. 30 (Black/Dark Green wire).
13. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-5A. If resistance is 5 ohms or more, repair open circuit in Black/Dark Green wire between PCM and connector for upstream oxygen sensor. Perform TEST VER-5A.

TEST TC-35A - NO VEHICLE SPEED SENSOR (VSS) SIGNAL

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Scheme 134

Scheme 135

1. Raise and support vehicle so front wheels are free to rotate. Start engine. Using scan tool, read the vehicle speed sensor.
2. Place transaxle in any forward gear. If scan tool displays zero MPH, go to step 9). If scan tool displays more than zero MPH, go to next step.
3. Conditions required to set DTC are not present at this time. On models with electronically controlled 4-speed AUTOMATIC TRANSMISSION, go to step 4). On models with 3-speed AUTOMATIC TRANSMISSION, DTC may be stored in Powertrain Control Module (PCM) if no vehicle speed sensor signal is received from vehicle speed sensor for more than 6 seconds. Possible causes are: open or shorted signal circuit, vehicle speed sensor drive gear damaged, open 8-volt supply or sensor ground circuit, defective vehicle speed sensor, defective PCM, defective connector terminals or wiring. Go to step 5).
4. On models with electronically controlled 4-speed AUTOMATIC TRANSMISSION, DTC may be stored in Powertrain Control Module (PCM) if no vehicle speed sensor signal is received from Transmission Control Module (TCM) for more than 6 seconds. Possible causes are: open or shorted signal circuit from TCM, pinion factor not programmed, defective output speed sensor circuit, defective PCM or TCM. Go to step 7).
5. On models with 3-speed AUTOMATIC TRANSMISSION, check for defective wiring or connections at vehicle speed sensor and PCM. Vehicle speed sensor is mounted on extension housing for passenger's side axle shaft at firewall side of transaxle. (Scheme 134) The PCM is located between driver's side front fender and power distribution center, near battery. Go to next step.
6. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A. (Scheme 134): Locating Vehicle Speed Sensor
7. On models with electronically controlled 4-speed AUTOMATIC TRANSMISSION, check for defective wiring or connections at TCM and PCM. The TCM is located on passenger's side front corner of engine compartment, on inner fender, near windshield washer reservoir. (Scheme 133) The PCM is located between driver's side front fender and power distribution center, near battery. Go to next step.
8. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
9. On models with 3-speed AUTOMATIC TRANSMISSION, perform TEST TC-35B. On models with electronically controlled 4-speed AUTOMATIC TRANSMISSION, using scan tool, check for stored DTCs for AUTOMATIC TRANSMISSION. See appropriate AUTOMATIC TRANSAXLE article in the appropriate section. Go to next step.
10. If scan tool displays any DTCs 50 through 58 for AUTOMATIC TRANSMISSION are present, or pinion factor is not programmed, perform repair procedures as necessary. If no DTCs are present, or pinion factor is not programmed is not displayed, go to next step.
11. Ensure ignition is off. Disconnect 60-pin connector at Transmission Control Module (TCM). The TCM is located on passenger's side front corner of engine compartment, on inner fender, near windshield washer reservoir. (Scheme 133)
12. Connect jumper wire to TCM connector terminal No. 58 (White/Orange wire). This is the VSS signal circuit. Turn ignition on.
13. Using scan tool, read vehicle speed sensor signal. Momentarily touch remaining end of jumper wire to ground while monitoring vehicle speed sensor signal display on scan tool.
14. If scan tool displays zero MPH, go to next step. If scan tool displays more than zero MPH, go to step 18).
15. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
16. Using ohmmeter, check resistance between TCM connector terminal No. 58 (White/Orange wire) and PCM connector terminal No. 66 (White/Orange wire). If resistance is 5 ohms or more, repair open circuit in White/Orange wire between TCM and PCM. Perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
17. Using ohmmeter, check resistance between ground and PCM connector terminal No. 66 (White/Orange wire). If resistance is less than 5 ohms, repair short to ground in White/Orange wire between PCM and TCM. Perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A.
18. Using ohmmeter, check resistance between ground and TCM connector terminal No. 14 (Light Green/White wire). If resistance is 5 ohms or more, go to step 21). If resistance is less than 5 ohms, go to next step.
19. Disconnect connector at output speed sensor located on side of transaxle, just below shift cable. (Scheme 134) (Scheme 135): Locating Output Speed Sensor
20. Using ohmmeter, check resistance between ground and TCM connector terminal No. 14 (Light Green/White wire). If resistance is less than 5 ohms, repair short to ground in Light Green/White wire between TCM and output speed sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, replace output speed sensor. Perform TEST VER-2A.
21. Using ohmmeter, check resistance between TCM connector terminals No. 14 (Light Green/White wire) and No. 13 (Dark Blue/Black wire). If resistance is 300-1200 ohms, replace TCM. Reprogram pinion factor and perform shift quality quick learn procedure. See COMPUTER RELEARN PROCEDURES in GENERAL INFORMATION. Perform TEST VER-2A. If resistance is not 300-1200 ohms, go to next step.
22. Disconnect connector at output speed sensor located on side of transaxle, just below shift cable.
23. Using ohmmeter, check resistance between terminal No. 2 (Light Green/White wire) on connector for output speed sensor and TCM connector terminal No. 14 (Light Green/White wire). If resistance is 5 ohms or more, repair open circuit in Light Green/White wire between TCM and output speed sensor. Perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
24. Using ohmmeter, check resistance between terminal No. 1 (Dark Blue/Black wire) on connector for output speed sensor and TCM connector terminal No. 13 (Dark Blue/Black wire). If resistance is 5 ohms or more, repair open circuit in Dark Blue/Black wire between TCM and output speed sensor. Perform TEST VER-2A. If resistance is less than 5 ohms, replace output speed sensor. Perform TEST VER-2A.

TEST TC-35B - NO VEHICLE SPEED SENSOR (VSS) SIGNAL

Note. Perform TEST TC-35A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector from vehicle speed sensor. Vehicle speed sensor is mounted on extension housing for passenger's side axle shaft at firewall side of transaxle. (Scheme 134)
2. Turn ignition on. Using voltmeter, check voltage at terminal No. 3 (Orange wire) on connector for vehicle speed sensor.
3. If voltage is more than 7 volts, go to next step. If voltage is 7 volts or less, repair open circuit in Orange wire between Powertrain Control Module (PCM) and vehicle speed sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
4. Using voltmeter, check voltage at terminal No. 1 (White/Orange wire) on connector for vehicle speed sensor. If voltage is 4 volts or less, go to step 8). If voltage is more than 4 volts, go to next step.
5. Connect jumper wire to terminal No. 1 (White/Orange wire) on connector for vehicle speed sensor. Using scan tool, read vehicle speed sensor signal. Momentarily touch remaining end of jumper wire to terminal No. 2 (Black/Light Blue wire) on the connector while monitoring vehicle speed sensor signal.
6. If scan tool displays zero MPH, perform TEST TC-35C. If scan tool displays more than zero MPH, go to next step.
7. Remove vehicle speed sensor from transaxle. Inspect drive gear for damage. If drive gear is damaged, repair as necessary. Perform TEST VER-2A. If drive gear is okay, replace vehicle speed sensor. Perform TEST VER-2A.
8. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
9. Using ohmmeter, check resistance between terminal No. 1 (White/Orange wire) on connector for vehicle speed sensor and PCM connector terminal No. 66 (White/Orange wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in White/Orange wire between PCM and vehicle speed sensor. Perform TEST VER-2A.
10. Using ohmmeter, check resistance between ground and PCM connector terminal No. 66 (White/Orange wire). If resistance is less than 5 ohms, repair short to ground in White/Orange wire between PCM and vehicle speed sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A.

TEST TC-35C - NO VEHICLE SPEED SENSOR (VSS) SIGNAL

Note. Perform TEST TC-35A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Using ohmmeter, check resistance between ground and terminal No. 2 (Black/Light Blue wire) on connector for vehicle speed sensor.
2. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Black/Light Blue wire between Powertrain Control Module (PCM) and vehicle speed sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
3. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
4. Check connectors for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connectors necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, replace PCM. Perform TEST VER-2A.

TEST TC-36A - MAP SENSOR VOLTAGE TOO LOW

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Turn ignition on with engine off. Using scan tool, read MAP sensor voltage. If MAP sensor voltage is less than 1.2 volts, go to step 7). If MAP sensor voltage is 1.2 volts or more, go to next step.
2. Wiggle wiring harness and connector going to MAP sensor while monitoring MAP sensor voltage. See MAP SENSOR LOCATIONS table. MAP SENSOR LOCATIONS Application (1) Location 3.3L On End Of Intake Manifold, Near Throttle Body (1) MAP sensor contains a 3-pin connector.
3. If MAP sensor voltage changes while moving wiring harness, repair wiring harness or connector as necessary. Perform TEST VER-2A. If MAP sensor voltage does not change while moving wiring harness, go to next step.
4. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) when MAP sensor signal voltage is less than 1.2 volts at start, or less than .02 volt for 1.76 seconds with engine running. Possible causes are: open 5-volt supply circuit, signal circuit shorted to ground, defective MAP sensor, defective PCM, defective connector terminals or wiring. Go to next step.
5. Check for defective wiring or connections at MAP sensor and PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
6. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
7. Start engine and allow engine to idle. Disconnect connector at MAP sensor. See MAP SENSOR LOCATIONS table in this test.
8. Using scan tool, read MAP sensor voltage. If MAP sensor voltage is more than 4 volts, replace MAP sensor. Perform TEST VER-2A. If MAP sensor voltage is 4 volts or less, go to next step.
9. Turn ignition off. Using ohmmeter, check resistance between ground and Dark Green/Red wire on connector for MAP sensor. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on Dark Green/Red wire between MAP sensor and Powertrain Control Module (PCM). Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
10. Using ohmmeter, check resistance between Dark Green/Red wire and Black/Light Blue wire on connector for MAP sensor. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair Dark Green/Red wire and Black/Light Blue wire between MAP sensor and PCM, as they are shorted together. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
11. Using voltmeter, check voltage at Dark Green/Red wire on connector for MAP sensor. If voltage is one volt or less, repair open circuit in Dark Green/Red wire between MAP sensor and PCM. Perform TEST VER-2A. If voltage is more than one volt, replace PCM. Perform TEST VER-2A.

TEST TC-37A - MAP SENSOR VOLTAGE TOO HIGH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Start engine and allow engine to idle. Using scan tool, read MAP sensor voltage. If MAP sensor voltage is more than 4.6 volts, go to step 7). If MAP sensor voltage is 4.6 volts or less, go to next step.
2. Wiggle wiring harness and connector going to MAP sensor while monitoring MAP sensor voltage. See MAP SENSOR LOCATIONS table. MAP SENSOR LOCATIONS Application (1) Location 3.3L On End Of Intake Manifold, Near Throttle Body (1) MAP sensor contains a 3-pin connector.
3. If MAP sensor voltage changes while moving wiring harness, repair wiring harness or connector as necessary. Perform TEST VER-2A. If MAP sensor voltage does not change while moving wiring harness, go to next step.
4. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) when MAP sensor voltage is greater than 4.6 volts. Possible causes are: signal circuit open, defective MAP sensor, defective PCM, defective sensor ground circuit, sensor signal circuit shorted to voltage, defective connector terminals or wiring. Go to next step.
5. Check for defective wiring or connections at MAP sensor and PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
6. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
7. Shut engine off. Turn ignition on with engine off. Disconnect connector at MAP sensor. See MAP SENSOR LOCATIONS table in this test.
8. Connect jumper wire between Dark Green/Red wire and Black/Light Blue wire on connector for MAP sensor. Crank engine while using scan tool to monitor MAP sensor voltage.
9. If MAP sensor voltage is less than one volt, replace MAP sensor. Perform TEST VER-2A. If MAP sensor voltage is one volt or more, go to next step.
10. Remove jumper wire from Black/Light Blue wire on connector for MAP sensor and reconnect jumper wire on engine ground. Read MAP sensor voltage. If MAP sensor voltage is one volt or more, go to next step. If MAP sensor voltage is less than one volt, repair open circuit in Black/Light Blue wire between PCM and MAP sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
11. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
12. Using ohmmeter, check resistance between Dark Green/Red wire on connector for MAP sensor and PCM connector terminal No. 36 (Dark Green/Red wire). If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Dark Green/Red wire between PCM and MAP sensor. Perform TEST VER-2A.

TEST TC-39A - NO CHANGE IN MAP SENSOR FROM START TO RUN

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Turn ignition on with engine off. Using scan tool, check for stored Diagnostic Trouble Codes (DTCs). If DTC is set to indicate MAP SENSOR VOLTAGE IS TOO LOW, perform TEST TC-36A. If no DTC is set to indicate MAP SENSOR VOLTAGE IS TOO LOW, go to next step.
2. Using scan tool, clear DTCs from Powertrain Control Module (PCM). Start engine and allow engine to idle for 30 seconds. Using scan tool, check for stored DTCs. If DTC is set to indicate NO CHANGE IN MAP FROM START TO RUN, go to step 9). If no DTC is set to indicate NO CHANGE IN MAP FROM START TO RUN, go to next step.
3. With engine idling, use scan tool to increase engine speed to 1500 RPM. Note location of MAP sensor. See MAP SENSOR LOCATIONS table. MAP SENSOR LOCATIONS Application (1) Location 3.3L On End Of Intake Manifold, Near Throttle Body (1) MAP sensor contains a 3-pin connector.
4. Using scan tool, read MAP sensor voltage with engine at 1500 RPM while wiggling wiring harness and connector from PCM to the MAP sensor. The PCM is located between driver's side front fender and power distribution center, near battery.
5. If engine stalls or MAP sensor voltage becomes erratic while wiggling wiring harness, repair wiring harness and connector as necessary. Perform TEST VER-2A. If engine does not stall or MAP sensor voltage does not becomes erratic while wiggling wiring harness, go to next step.
6. While monitoring MAP sensor vacuum display on scan tool, open and close the throttle several times. If MAP sensor vacuum decreases rapidly to less than one in. Hg, go to next step. If MAP sensor vacuum does not decrease rapidly to less than one in. Hg, go to step 8).
7. Conditions required to set DTC are not present at this time. The MAP sensor measures manifold vacuum and ambient barometric pressure. MAP sensor provides a low voltage signal (.5-1.8 volts) to PCM at idle with high vacuum, and a high voltage signal (3.9-4.8 volts) to PCM at open throttle with low vacuum. DTC may be stored in PCM when too small a difference is seen between barometric pressure at ignition and manifold vacuum. Possible causes are: restricted or leaking vacuum supply to MAP sensor, ice in MAP sensor passages, defective MAP sensor, defective PCM, defective connector terminals or wiring.
8. Remove MAP sensor. Inspect intake manifold and MAP sensor vacuum ports for vacuum restriction. If restriction exists, repair as necessary. Perform TEST VER-2A. If no restriction exists, replace MAP sensor. Perform TEST VER-2A.
9. Turn ignition on with engine off. Note location of MAP sensor. See MAP SENSOR LOCATIONS table in this test. Remove MAP sensor and inspect for vacuum restrictions. If vacuum restriction exists, repair as necessary. Reinstall MAP sensor. Perform TEST VER-2A. If no restriction exists, go to next step.
10. Using voltmeter, check voltage at Violet/White wire on connector for MAP sensor. If voltage is more than 4 volts, replace MAP sensor. Perform TEST VER-2A. If voltage is 4 volts or less, repair open circuit in Violet/White wire between PCM and MAP sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.

TEST TC-40A - NO CRANK REFERENCE SIGNAL AT PCM

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Turn ignition off and back on again. Attempt to start engine while using scan tool to monitor Camshaft Position (CMP) sensor and Crankshaft Position (CKP) sensor signal state. If CMP or CKP sensor signal exists and state changes to present, go to next step. If no CMP or CKP signals exist and state does not change to present, go to step 7).
2. If only CMP signal state changes to present, go to step 7). If only CKP signal state changes to present, perform TEST TC-1A. If CMP and CKP signals exist and state changes to present, go to next step.
3. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) when no CKP sensor signal exists during engine cranking, or CMP sensor signal exists but no CKP sensor signal exists. Possible causes are: open or shorted 8-volt supply circuit, open sensor ground, open or shorted sensor signal circuit, excessive camshaft or crankshaft position sensor clearance, defective crankshaft or camshaft position sensor and components, defective PCM, damaged flywheel or crankshaft pulse ring. Go to next step.
4. Check for defective wiring or connections at camshaft position sensor, crankshaft position sensor and PCM. See COMPONENT LOCATION table. COMPONENT LOCATION Component Location Camshaft Position Sensor (CMP) Top Of Timing Chain Cover, Just Below Thermostat Housing Crankshaft Position Sensor (CKP) Top Of Transaxle Housing, Above Flywheel, Near Corner Of Rear Exhaust Manifold PCM Between Driver's Side Front Fender & Power Distribution Center, Near Battery
5. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, go to next step.
6. Start engine and allow engine to idle. Wiggle wiring harness from PCM to camshaft position sensor and crankshaft position sensor. If engine misfires or stalls while wiggling wiring harness, repair wiring harness as necessary. Perform TEST VER-2A. If engine does not misfire or stall while wiggling wiring harness, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
7. Ensure ignition is off. Disconnect connector at crankshaft position sensor. See COMPONENT LOCATION table in this test.
8. Turn ignition on. Using voltmeter, check voltage at terminal No. 1 (Orange wire) on connector for crankshaft position sensor. If voltage is 7 volts or less, perform TEST TC-40B. If voltage is more than 7 volts, go to next step.
9. Turn ignition off. Connect jumper wire to terminal No. 3 (Gray/Black wire) on connector for crankshaft position sensor. Turn ignition on.
10. Using scan tool, note crankshaft signal state. Momentarily touch remaining end of jumper wire to terminal No. 2 (Black/Light Blue wire) on connector for crankshaft position sensor several times while monitoring crankshaft signal state.
11. If CKP signal state changes to present, perform TEST TC-40C. If CKP signal state does not change to present, go to next step.
12. Turn ignition off. Remove jumper wire. Using ohmmeter, check resistance between ground and terminal No. 2 (Black/Light Blue wire) on connector for crankshaft position sensor. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Black/Light Blue wire between PCM and crankshaft position sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
13. Ensure ignition is off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
14. Using ohmmeter, check resistance between terminal No. 3 (Gray/Black wire) on connector for crankshaft position sensor and PCM connector terminal No. 32 (Gray/Black wire). If resistance is 5 ohms or more, repair open circuit in Gray/Black wire between PCM and crankshaft position sensor. Perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
15. Using ohmmeter, check resistance between ground and terminal No. 3 (Gray/Black wire) on connector for crankshaft position sensor. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A. If resistance is less than 5 ohms, repair short to ground in Gray/Black wire between PCM, crankshaft position sensor.

Note. On models with electronically controlled 4-speed automatic transaxle, also check for short to ground in Gray/Black wire between PCM and Transmission Control Module (TCM). The TCM is located on passenger's side front corner of engine compartment, on inner fender, near windshield washer reservoir. (Scheme 133)

TEST TC-40B - NO CRANK REFERENCE SIGNAL AT PCM

Note. Perform TEST TC-40A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector at camshaft position sensor. Camshaft position sensor is located on top of timing chain cover, just below thermostat housing.
2. Turn ignition on. Using voltmeter, check voltage at terminal No. 1 (Orange wire) on connector for crankshaft position sensor. If voltage is more than 7 volts, replace camshaft position sensor. Perform TEST VER-2A. If voltage is 7 volts or less, go to next step.
3. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
4. Using ohmmeter, check resistance between ground and terminal No. 1 (Orange wire) on connector for crankshaft position sensor. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Orange wire between PCM, camshaft position sensor and crankshaft position sensor. Perform TEST VER-2A. NOTE: On models with 3-speed AUTOMATIC TRANSMISSION, also check for short to ground on Orange wire between PCM and vehicle speed sensor. Vehicle speed sensor is mounted on extension housing for passenger's side axle shaft at firewall side of transaxle. (Scheme 134)
5. Using ohmmeter, check resistance between terminal No. 1 (Orange wire) on connector for crankshaft position sensor and PCM connector terminal No. 44 (Orange wire). If resistance is 5 ohms or more, repair open circuit in Orange wire between PCM and crankshaft position sensor. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-40C - NO CRANK REFERENCE SIGNAL AT PCM

Note. Perform TEST TC-40A before proceeding.

1. Remove crankshaft position sensor. Crankshaft position sensor is located on top of transaxle housing, above flywheel, near corner of rear exhaust manifold.
2. Inspect slot areas on flywheel, near starter ring for damage. There are 3 sets of slots areas which contain 4 slots in each set. If slot areas are okay, replace crankshaft position sensor. Perform TEST VER-2A. If slot areas are damaged, repair or replace flywheel as necessary. Perform TEST VER-2A.

TEST TC-41A - IGNITION COIL NO. 3 PRIMARY CIRCUIT

Note. Perform TEST TC-43A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Scheme 136

1. Ensure ignition is off. Disconnect connector at ignition coil located on front of engine, above timing chain cover. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
2. Turn ignition on. Using scan tool, actuate ignition coil No. 3. Using voltmeter, check voltage at terminal No. 4 (Dark Green/Orange wire) on connector for ignition coil.
3. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in Dark Green/Orange wire from Auto Shutdown (ASD) relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
4. Using ohmmeter, check ignition coil No. 3 primary resistance between B+ terminal and ignition coil No. 3 terminal on ignition coil. (Scheme 136) If primary resistance is 2 ohms or more, replace ignition coil. Perform TEST VER-2A. If primary resistance is less than 2 ohms, go to next step. (Scheme 136): Identifying Ignition Coil Terminals
5. Turn ignition off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
6. Using ohmmeter, check resistance between ground and PCM connector terminal No. 2 (Red/Yellow wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Red/Yellow wire between PCM and ignition coil. Perform TEST VER-2A.
7. Using ohmmeter, check resistance between terminal No. 1 (Red/Yellow wire) on connector for ignition coil and PCM connector terminal No. 2 (Red/Yellow wire). If resistance is 5 ohms or more, repair open circuit in Red/Yellow wire between PCM and ignition coil. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-42A - IGNITION COIL NO. 2 PRIMARY CIRCUIT

Note. Perform TEST TC-43A before proceeding. For connector terminal identification, see CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see SYSTEM WIRING DIAGRAMS article.

1. Ensure ignition is off. Disconnect connector at ignition coil. Connector is located on ignition coil at front of engine, above timing chain cover.
2. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
3. Turn ignition on. Using scan tool, actuate ignition coil No. 2. Using voltmeter, check voltage at Dark Green/Orange wire on connector for ignition coil.
4. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in Dark Green/Orange wire from Auto Shutdown (ASD) relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
5. Using ohmmeter, check ignition coil No. 2 primary resistance between B+ terminal and ignition coil No. 2 terminal on ignition coil. see scheme 48
6. If ignition coil primary resistance is 2 ohms or more, replace ignition coil. Perform TEST VER-2A. If ignition coil primary resistance is less than 2 ohms, go to next step.
7. Turn ignition off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
8. Using ohmmeter, check resistance between ground and PCM connector terminal No. 3 (Dark Blue/Tan wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Dark Blue/Tan wire between PCM and ignition coil. Perform TEST VER-2A.
9. Using ohmmeter, check resistance between Dark Blue/Tan wire on connector for ignition coil and PCM connector terminal No. 3 (Dark Blue/Tan wire). If resistance is 5 ohms or more, repair open circuit in Dark Blue/Tan wire between PCM and ignition coil. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A. see scheme 48: Identifying Ignition Coil Terminals

TEST TC-43A - IGNITION COIL PRIMARY CIRCUIT

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, check for stored Diagnostic Trouble Codes (DTCs) that pertain to the Auto Shutdown (ASD) relay. If any DTCs exist for the ASD relay, repair as necessary before continuing.
2. Using scan tool, clear DTCs from Powertrain Control Module (PCM). Attempt to start engine by cranking engine for at least 10 seconds if necessary.
3. Using scan tool, check for stored DTCs. If DTC is set to indicate IGNITION COIL PRIMARY CIRCUIT, go to step 9). If no DTC is set to indicate IGNITION COIL PRIMARY CIRCUIT, go to next step.
4. Conditions required to set DTC are not present at this time. Ignition coil is supplied 12 volts from the ASD relay. The PCM controls primary circuits for the ignition coils. Amount of dwell is based upon crankshaft and camshaft speed. DTC may be stored in PCM when peak current is not achieved within specified dwell. It takes 3 seconds during cranking or up to 6 seconds with engine running for the DTC to be set. Possible causes are: open or shorted ignition coil driver circuit, open ignition coil primary, open Auto Shutdown (ASD) relay output circuit, defective PCM, defective connector terminals or wiring. Go to next step.
5. Inspect connectors and wiring harness from PCM to ignition coil and connections at ASD relay. See COMPONENT LOCATION table. COMPONENT LOCATION Component Location ASD Relay In Rear Of Power Distribution Center At Driver's Side Front Fender, Near Battery Ignition Coil Front Of Engine, Above Timing Chain Cover PCM Between Driver's Side Front Fender Power Distribution Center, Near Battery
6. If wiring harness and connectors are damaged, repair as necessary. Perform TEST VER-2A. If wiring harness and connectors are not damaged, go to next step.
7. Start engine and allow engine to idle. Wiggle wiring harness from PCM to ignition coil.
8. If engine misfires or stalls while wiggling wiring harness, repair wiring harness as necessary. Perform TEST VER-2A. If engine does not misfire or stall while wiggling wiring harness, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
9. Perform correct test by noting DTC displayed on scan tool. See IGNITION COIL CIRCUIT TESTS table.

IGNITION COIL CIRCUIT TESTS

TEST TC-43B - IGNITION COIL NO. 1 PRIMARY CIRCUIT

Note. Perform TEST TC-43A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector at ignition coil. Connector is located on ignition coil at front of engine, above timing chain cover.
2. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
3. Turn ignition on. Using scan tool, actuate ignition coil No. 1. Using voltmeter, check voltage at Dark Green/Orange wire on connector for ignition coil.
4. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in Dark Green/Orange wire from Auto Shutdown (ASD) relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
5. Using ohmmeter, check ignition coil No. 1 primary resistance between B+ terminal and ignition coil No. 1 terminal on ignition coil. (Scheme 136)
6. If ignition coil primary resistance is 2 ohms or more, replace ignition coil. Perform TEST VER-2A. If ignition coil primary resistance is less than 2 ohms, go to next step.
7. Turn ignition off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
8. Use ohmmeter to check resistance between ground and PCM connector terminal No. 11 (Gray or Gray/Red wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Gray or Gray/Red wire between PCM and ignition coil. Perform TEST VER-2A.
9. Use ohmmeter to check resistance between Gray wire on connector for ignition coil and PCM connector terminal No. 11 (Gray or Gray/Red wire). If resistance is 5 ohms or more, repair open circuit in Gray or Gray/Red wire between PCM and ignition coil. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-44A - NO ASD RELAY OUTPUT VOLTAGE AT PCM

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Note. On 3.3L Compressed Natural Gas (CNG), Auto Shutdown (ASD) relay may be referred to as low pressure shutoff relay.

1. Using scan tool, check for stored Diagnostic Trouble Code (DTC) that indicates AUTO SHUTDOWN RELAY CONTROL CIRCUIT. If DTC is set for AUTO SHUTDOWN RELAY CONTROL CIRCUIT, perform TEST TC-10A. If no DTC is set for AUTO SHUTDOWN RELAY CONTROL CIRCUIT, go to next step.
2. Using scan tool, clear DTCs from Powertrain Control Module (PCM). Attempt to start engine and allow engine to idle.
3. Using scan tool, check for stored DTCs. If DTC is set to indicate NO ASD RELAY OUTPUT VOLTAGE AT PCM, go to step 10). If no DTC is set to indicate NO ASD RELAY OUTPUT VOLTAGE AT PCM, go to next step.
4. Conditions required to set DTC are not present at this time. The ASD relay receives voltage from ignition switch and engine fuse in power distribution center. The PCM grounds the ASD relay control circuit when ignition is on and engine RPM is detected.
5. When ASD relay control circuit is grounded, ASD relay is energized and provides voltage to injectors, ignition coil(s), oxygen sensor(s), generator and low pressure sensor on 3.3L CNG. The PCM monitors ASD relay output circuit to ensure voltage exists at ASD relay. DTC may be stored in PCM when no voltage is received on ASD relay output circuit at PCM when ASD relay is energized. Possible causes are: defective ASD relay, ASD relay wiring to PCM open or shorted, ignition switch power supply to ASD relay open, defective circuit driver in PCM, defective connector terminals. Go to next step.
6. Inspect wiring and connectors from PCM to ASD relay. The ASD relay is located in rear of power distribution center at driver's side front fender, near battery. see scheme 49 The PCM is located between driver's side front fender and power distribution center, near battery. see scheme 49: Locating ASD Relay & Identifying Power Distribution Center Cavities
7. If wiring or connectors are damaged, repair as necessary. Perform TEST VER-2A. If wiring and connectors are not damaged, go to next step.
8. With engine idling, wiggle wiring harness from PCM to ASD relay. Using scan tool, check for stored DTCs.
9. If DTC is set to indicate NO ASD RELAY OUTPUT VOLTAGE AT PCM while wiggling wiring harness, repair wiring harness and connectors as necessary. Perform TEST VER-2A. If DTC is not set to indicate NO ASD RELAY OUTPUT VOLTAGE AT PCM while wiggling wiring harness, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
10. If engine will start, go to step 18). If engine will not start, go to next step.
11. Remove ASD relay. The ASD relay is located in rear of power distribution center at driver's side front fender, near battery. see scheme 49
12. Using voltmeter, check voltage at cavity "B" (fused B+ circuit) in power distribution center. see scheme 49
13. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, check for defective fuse No. 12 in power distribution center or for open circuit in fused B+ circuit to ASD relay. Perform TEST VER-2A.
14. Install a substitute ASD relay. Attempt to start the engine. If engine starts, replace original ASD relay. Perform TEST VER-2A. If engine still fails to start, go to next step.
15. Ensure ignition is off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
16. Using ohmmeter, check resistance between cavity "D" (Dark Green/Orange wire) on power distribution center and PCM connector terminal No. 6 (Dark Green/Orange wire). see scheme 49
17. If resistance is more than 5 ohms, repair open circuit in Dark Green/Orange wire between PCM and ASD relay. Perform TEST VER-2A. If resistance is 5 ohms or less, replace PCM. Perform TEST VER-2A.
18. Ensure ignition is off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
19. Remove ASD relay. The ASD relay is located in rear of power distribution center at driver's side front fender, near battery. 20) Using ohmmeter, check resistance between cavity "D" (Dark Green/Orange wire) on power distribution center and PCM connector terminal No. 6 (Dark Green/Orange wire).
20. If resistance is more than 5 ohms, repair open circuit in Dark Green/Orange wire between PCM and ASD relay. Perform TEST VER-2A. If resistance is 5 ohms or less, replace PCM. Perform TEST VER-2A.

TEST TC-46A - EGR SYSTEM FAILURE

Note. Test applies only to 3.3L (gasoline).

1. Ensure all accessories are off. Start engine and warm engine to normal operating temperature.
2. Disconnect electrical connector from EGR solenoid. The EGR solenoid is located on top of EGR backpressure transducer which contains vacuum hose to EGR valve. NOTE: Electrical connector from EGR solenoid should be disconnected for the remaining portion of this test. When this test is completed, use scan tool to clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM).
3. Disconnect vacuum supply hose from EGR solenoid. Using vacuum gauge, check vacuum on vacuum supply hose for EGR solenoid. If vacuum is more than 10 in. Hg, go to next step. If vacuum is 10 in. Hg or less, repair vacuum supply to EGR solenoid. Perform TEST VER-2A.
4. Reconnect vacuum supply hose on EGR solenoid. Disconnect vacuum hose at top of EGR valve. This is the vacuum hose that fits between EGR solenoid and EGR valve.
5. Connect vacuum gauge on vacuum hose for EGR valve. If vacuum reading does not pulsate, go to step 9). If vacuum reading pulsates, go to next step.
6. Monitor vacuum reading while momentarily increasing engine speed to more than 2000 RPM. If vacuum reading stabilizes, go to next step. If vacuum reading does not stabilize, replace EGR valve assembly. Perform TEST VER-2A.
7. Remove EGR valve. Inspect EGR valve, intake manifold and signal tube for restrictions. Signal tube is located below EGR valve and contains a vacuum hose which fits between signal tube to the bottom of EGR backpressure transducer.
8. If restrictions exist, repair or replace components as necessary, Perform TEST VER-2A. If no restrictions exist, replace EGR valve assembly. Perform TEST VER-2A.
9. Reinstall vacuum hose on top of EGR valve. Disconnect backpressure vacuum hose from EGR backpressure transducer. This is the vacuum hose that goes from bottom of EGR backpressure transducer to signal tube (lower port) located below EGR valve.
10. Install vacuum gauge on backpressure vacuum hose. If vacuum reading does not pulsate, go to next step. If vacuum reading pulsates, replace EGR valve assembly. Perform TEST VER-2A.
11. Check for sizeable exhaust leaks. If sizeable exhaust leaks exist, repair as necessary. Perform TEST VER-2A. If no sizeable exhaust leaks exist, check for loose EGR valve mounting bolts or defective EGR valve mounting gasket.
12. If loose EGR valve mounting bolts or defective EGR valve mounting gasket exist, repair as necessary. Perform TEST VER-2A. If EGR valve mounting bolts and EGR valve mounting gasket are okay, replace EGR valve assembly. Perform TEST VER-2A.

TEST TC-48A - PCM FAILURE EEPROM WRITE DENIED & PCM FAILURE SRI MILE NOT STORED

1. Turn ignition on. Using scan tool, perform SRI MEMORY TEST. If scan tool does not display WRITE FAILURE, go to next step. If scan tool displays WRITE FAILURE, replace Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery. Perform TEST VER-2A.
2. If scan tool displays WRITE REFUSED, go to step 5). If scan tool does not display WRITE REFUSED, go to next step.
3. If scan tool displays SRI MILEAGE INVALID, update the mileage. Perform SRI MEMORY TEST again, and then perform TEST VER-2A. If scan tool does not display SRI MILEAGE INVALID, go to next step.
4. Compare SRI mileage stored with mileage on the odometer on instrument panel. If mileage is the same, perform SRI MEMORY TEST again, and then perform TEST VER-2A. If mileage is not the same, update the mileage. Perform SRI MEMORY TEST again, and then perform TEST VER-2A.
5. The PCM was busy. Using scan tool, perform SRI MEMORY TEST again. It may be necessary to perform SRI MEMORY TEST 2 or more times.
6. If scan tool still displays WRITE REFUSED again, replace PCM. The PCM is located between driver's side front fender and power distribution center, near battery. Perform TEST VER-2A. If scan tool does not display WRITE REFUSED again, test is complete. Perform TEST VER-2A.

TEST TC-59A - KNOCK SENSOR CIRCUIT

Note. Test applies only to 3.3L (gasoline). For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Disconnect connector at knock sensor. Knock sensor is located on cylinder block, just in front of the starter.
2. Turn ignition on with engine off. Using voltmeter, check voltage at terminal No. 2 (Dark Blue/Light Green wire) on connector for knock sensor.
3. If voltage is 2 volts or less, go to next step. If voltage is more than 2 volts, repair short to voltage in Dark Blue/Light Green wire between PCM and knock sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
4. Using ohmmeter, check resistance between ground and terminal No. 1 (Black/Light Blue wire) on connector for knock sensor. If resistance is 5 ohms or more, repair open circuit in Black/Light Blue wire between PCM and knock sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery. If resistance is less than 5 ohms, go to next step.
5. Turn ignition off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
6. Using ohmmeter, check resistance between ground and terminal No. 2 (Dark Blue/Light Green wire) on connector for knock sensor. If resistance is less than 5 ohms, repair short to ground in Dark Blue/Light Green wire between PCM and knock sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
7. Using ohmmeter, check resistance between terminal No. 2 (Dark Blue/Light Green wire) on connector for knock sensor and PCM connector terminal No. 24 (Dark Blue/Light Green wire). If resistance is less than 5 ohms, replace knock sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Dark Blue/Light Green wire between PCM and knock sensor. Perform TEST VER-2A.

TEST TC-60A - BAROMETRIC PRESSURE OUT OF RANGE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Turn ignition on. Using scan tool, read MAP sensor voltage. If MAP sensor voltage is less than 2.2 volts, go to step 6). If MAP sensor voltage is 2.2 volts or more, go to next step.
2. Conditions required to set DTC are not present at this time. The MAP sensor voltage is used by Powertrain Control Module (PCM) to determine barometric pressure in the intake manifold. DTC may be stored in PCM when PCM senses MAP sensor voltage is less than 2.196 volts, but greater than .019 volt for 300 milliseconds. Possible causes are: defective MAP sensor, defective PCM, defective connectors or wiring. Go to next step.
3. Check for defective wiring or connections at MAP sensor and PCM. The PCM is located between driver's side front fender and power distribution center, near battery. See MAP SENSOR LOCATIONS table. MAP SENSOR LOCATIONS Application (1) Location 3.3L On End Of Intake Manifold, Near Throttle Body (1) MAP sensor contains a 3-pin connector.
4. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, go to next step.
5. Wiggle wiring harness from MAP sensor to PCM while monitoring MAP sensor voltage. If MAP sensor voltage decreases to less than 2.2 volts while moving wiring harness, repair wiring harness or connector as necessary. Perform TEST VER-2A. If MAP sensor voltage does not decrease to less than 2.2 volts while moving wiring harness, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
6. Disconnect connector at MAP sensor. See MAP SENSOR LOCATIONS table in this test.
7. Using scan tool, read MAP sensor voltage. If MAP sensor voltage is more than 4.9 volts, replace MAP sensor. Perform TEST VER-2A. If MAP sensor voltage is 4.9 volts or less, go to next step.
8. If MAP sensor voltage is more than 2.2 volts, repair partial short to ground in Dark Green/Red wire between PCM and MAP sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery. If MAP sensor voltage is 2.2 volts or less, go to next step.
9. Using voltmeter, check voltage at Violet/White wire on connector for MAP sensor. If voltage is more than 4.5 volts, go to next step. If voltage is 4.5 volts or less, go to step 12).
10. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
11. Using ohmmeter, check resistance between Dark Green/Red wire on connector for MAP sensor and PCM connector terminal No. 36 (Dark Green/Red wire). If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Dark Green/Red wire between PCM and MAP sensor. Perform TEST VER-2A.
12. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
13. Using ohmmeter, check resistance between ground and PCM connector terminal No. 61 (Violet/White wire). If resistance is less than 5 ohms, repair short to ground in Violet/White wire between PCM and MAP sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
14. Using ohmmeter, check resistance between Violet/White wire on connector for MAP sensor and PCM connector terminal No. 61 (Violet/White wire). If resistance is 5 ohms or more, repair open circuit in Violet/White wire between PCM and MAP sensor. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-61A - INJECTOR NO. 4 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Perform TEST TC-61B.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 4. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, replace injector. Perform TEST VER-2A.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 2 (Dark Green/Orange wire) on connector for injector No. 4.
4. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
5. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
6. Using ohmmeter, check resistance between ground and PCM connector terminal No. 16 (Light Blue/Brown wire). If resistance is less than 5 ohms, repair short to ground in Light Blue/Brown wire between PCM and injector No. 4. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
7. Using ohmmeter, check resistance between terminal No. 1 (Light Blue/Brown wire) on connector for injector No. 4 and PCM connector terminal No. 16 (Light Blue/Brown wire). If resistance is 5 ohms or more, repair open circuit in Light Blue/Brown wire between PCM and injector No. 4. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-61B - INJECTOR NO. 4 CONTROL CIRCUIT

Note. Perform TEST TC-61A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. On 3.3L Compressed Natural Gas (CNG), perform TEST TC-61D. On 3.3L gasoline, ensure ignition is off. Disconnect connectors at injector wiring harness. Injector wiring harness is located at end of valve cover, near transaxle oil dipstick tube. Note which side of injector wiring harness connector goes to the injectors and which side goes to the Powertrain Control Module (PCM). NOTE: Injector side of injector wiring harness is the male side of injector wiring harness. The PCM side of injector wiring harness side is the female side of the injector wiring harness. Injector side of injector wiring harness slides into the PCM side of injector wiring harness.
2. Using ohmmeter, check resistance between terminals No. 6 (Light Blue/Brown wire) and No. 1 (Dark Green/Orange wire) on injector side (male side) of injector wiring harness. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, perform TEST TC-61C.
3. Using ohmmeter, check resistance between ground and terminal No. 6 (Light Blue/Brown wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, repair short to ground on Light/Blue wire to injector No. 4. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
4. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on PCM side (female side) of injector wiring harness.
5. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
6. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
7. Using ohmmeter, check resistance between ground and PCM connector terminal No. 16 (Light Blue/Brown wire). If resistance is less than 5 ohms, repair short to ground in Light Blue/Brown wire between PCM and injector No. 4. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
8. Using ohmmeter, check resistance between terminal No. 6 (Light Blue/Brown wire) on PCM side (female side) of injector wiring harness and PCM connector terminal No. 16 (Light Blue/Brown wire). If resistance is 5 ohms or more, repair open circuit in Light Blue/Brown wire between PCM and injector No. 4. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-61C - INJECTOR NO. 4 CONTROL CIRCUIT

Note. Perform TEST TC-61A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector at injector No. 4. Injector No. 4 is second injector back from front (timing chain end) of engine on right side when viewed from flywheel end of engine. This injector is located above cylinder No. 3, but delivers fuel to cylinder No. 4, due to crossflow intake manifold. It may be necessary to remove air intake plenum for access to connector at injector No. 4.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 4. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, replace injector. Perform TEST VER-2A.
3. Using ohmmeter, check resistance between terminal No. 2 (Light Blue/Brown wire) on connector for injector No. 4 and terminal No. 6 (Light Blue/Brown wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Light Blue/Brown. Perform TEST VER-2A.
4. Using ohmmeter, check resistance between ground and terminal No. 6 (Light Blue/Brown wire) on injector side (male side) of injector wiring harness. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on Light Blue/Brown wire to injector No. 4. Perform TEST VER-2A.
5. Reconnect injector wiring harness connectors. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 4.
6. If voltage cycles from high voltage to low voltage, replace Powertrain Control Module (PCM). Perform TEST VER-2A. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.

TEST TC-61D - INJECTOR NO. 4 CONTROL CIRCUIT

Note. Perform TEST TC-61A before proceeding. Test applies only to 3.3L Compressed Natural Gas (CNG). For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connectors at injector wiring harness. Injector wiring harness is located at end of valve cover, near transaxle oil dipstick tube. Note which side of injector wiring harness connector goes to the injectors and which side goes to the Powertrain Control Module (PCM). NOTE: Injector side of injector wiring harness is the male side of injector wiring harness. The PCM side of injector wiring harness side is the female side of the injector wiring harness. Injector side of injector wiring harness slides into the PCM side of injector wiring harness.
2. Using ohmmeter, check resistance between terminals No. 6 (Light Blue/Brown wire) and No. 1 (Dark Green/Orange wire) on injector side (male side) of injector wiring harness. If resistance is 3-6 ohms, go to next step. If resistance is not 3-6 ohms, perform TEST TC-61E.
3. Using ohmmeter, check resistance between ground and terminal No. 6 (Light Blue/Brown wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, repair short to ground on Light/Blue wire to injector No. 4. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
4. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on PCM side (female side) of injector wiring harness.
5. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
6. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
7. Using ohmmeter, check resistance between ground and PCM connector terminal No. 16 (Light Blue/Brown wire). If resistance is less than 5 ohms, repair short to ground in Light Blue/Brown wire between PCM and injector No. 4. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
8. Using ohmmeter, check resistance between terminal No. 6 (Light Blue/Brown wire) on PCM side (female side) of injector wiring harness and PCM connector terminal No. 16 (Light Blue/Brown wire). If resistance is 5 ohms or more, repair open circuit in Light Blue/Brown wire. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-61E - INJECTOR NO. 4 CONTROL CIRCUIT

Note. Perform TEST TC-61A before proceeding. Test applies only to 3.3L Compressed Natural Gas (CNG). For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector at injector No. 4. Injector No. 4 is second injector back from front (timing chain end) of engine on right side when viewed from flywheel end of engine. This injector is located above cylinder No. 3, but delivers fuel to cylinder No. 4, due to crossflow intake manifold. It may be necessary to remove air intake plenum for access to connector at injector No. 4.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 4. If resistance is 3-6 ohms, go to next step. If resistance is not 3-6 ohms, replace injector. Perform TEST VER-2A.
3. Using ohmmeter, check resistance between terminal No. 2 (Light Blue/Brown wire) on connector for injector No. 4 and terminal No. 6 (Light Blue/Brown wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Light Blue/Brown wire. Perform TEST VER-2A.
4. Using ohmmeter, check resistance between ground and terminal No. 6 (Light Blue/Brown wire) on injector side (male side) of injector wiring harness. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on Light Blue/Brown wire to injector No. 4. Perform TEST VER-2A.
5. Reconnect injector wiring harness connectors. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 4.
6. If voltage cycles from high voltage to low voltage, replace Powertrain Control Module (PCM). Perform TEST VER-2A. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.

TEST TC-62A - UPSTREAM O2 SENSOR SHORTED TO VOLTAGE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Turn ignition on. Using scan tool, read upstream oxygen sensor voltage. If upstream oxygen sensor voltage is more than 1.2 volts, go to next step. If upstream oxygen sensor voltage is not more than 1.2 volts, go to step 5).
2. Turn ignition off. Disconnect connector at upstream oxygen sensor, mounted on exhaust manifold. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-5A. If terminals are not pushed out, miswired or damaged, go to next step.
3. Turn ignition on. Using scan tool, read upstream oxygen sensor voltage with connector for upstream oxygen sensor disconnected.
4. If upstream oxygen sensor voltage is more than 1.2 volts, repair short to voltage in Black/Dark Green wire between PCM and upstream oxygen sensor. Perform TEST VER-5A. The PCM is located between driver's side front fender and power distribution center, near battery. If upstream oxygen sensor voltage is not more than 1.2 volts, replace upstream oxygen sensor. Perform TEST VER-5A.
5. Wiggle wiring harness and connector at upstream oxygen sensor, mounted on exhaust manifold, while monitoring upstream oxygen sensor voltage. If upstream oxygen sensor voltage increases to more than 1.2 volts at any time while moving wiring harness, repair wiring harness or connector for short to voltage as necessary. Perform TEST VER-5A. If upstream oxygen sensor voltage does not increase to more than 1.2 volts at any time while moving wiring harness, go to next step.
6. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) if upstream oxygen sensor voltage is more than 1.2 volts. Possible causes are: upstream oxygen sensor signal wire shorted to another circuit, dirt/moisture or grease causing voltage tracking in connector, defective upstream oxygen sensor, defective PCM, defective connector terminals or wiring. Go to next step.
7. Check for defective wiring or connections at upstream oxygen sensor and PCM. The PCM is located between driver's side front fender and power distribution center, near battery. If defective wiring or connections exist, repair as necessary. Perform TEST VER-5A. If no defective wiring or connections exist, go to next step.
8. Turn ignition off. Disconnect connector at upstream oxygen sensor. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-5A. If terminals are not pushed out, miswired or damaged, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-5A.

TEST TC-69A - INJECTOR NO. 5 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. On 3.3L Compressed Natural Gas (CNG), perform TEST TC-69D. On 3.3L gasoline, ensure ignition is off. Disconnect connector at injector No. 5. Injector No. 5 is third injector back from front (timing chain end) of engine on left side when viewed from flywheel end of engine. This injector is located above cylinder No. 6, but delivers fuel to cylinder No. 5, due to crossflow intake manifold.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 5. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, replace injector. Perform TEST VER-2A.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 5.
4. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
5. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
6. Using ohmmeter, check resistance between ground and PCM connector terminal No. 15 (Gray wire). If resistance is less than 5 ohms, repair short to ground in Gray wire between PCM and injector No. 5. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
7. Using ohmmeter, check resistance between terminal No. 2 (Gray wire) on connector for injector No. 5 and PCM connector terminal No. 15 (Gray wire). If resistance is 5 ohms or more, repair open circuit in Gray wire between PCM and injector No. 5. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-69D - INJECTOR NO. 5 CONTROL CIRCUIT

Note. Perform TEST TC-69A before proceeding. Test applies only to 3.3L Compressed Natural Gas (CNG). For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector at injector No. 5. Injector No. 5 is third injector back from front (timing chain end) of engine on left side when viewed from flywheel end of engine. This injector is located above cylinder No. 6, but delivers fuel to cylinder No. 5, due to crossflow intake manifold.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 5. If resistance is 3-6 ohms, go to next step. If resistance is not 3-6 ohms, replace injector. Perform TEST VER-2A.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 5.
4. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
5. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
6. Using ohmmeter, check resistance between ground and PCM connector terminal No. 15 (Gray wire). If resistance is less than 5 ohms, repair short to ground in Gray wire between PCM and injector No. 5. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
7. Using ohmmeter, check resistance between terminal No. 2 (Gray wire) on connector for injector No. 5 and PCM connector terminal No. 15 (Gray wire). If resistance is 5 ohms or more, repair open circuit in Gray wire between PCM and injector No. 5. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-70A - INJECTOR NO. 6 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Perform TEST TC-70B.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 6. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, replace injector. Perform TEST VER-2A.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 2 (Dark Green/Orange wire) on connector for injector No. 6.
4. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
5. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
6. Using ohmmeter, check resistance between ground and PCM connector terminal No. 14 (Brown/Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in Brown/Dark Blue wire between PCM and injector No. 6. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
7. Using ohmmeter, check resistance between terminal No. 1 (Brown/Dark Blue wire) on connector for injector No. 6 and PCM connector terminal No. 14 (Brown/Dark Blue wire). If resistance is 5 ohms or more, repair open circuit in Brown/Dark Blue wire between PCM and injector No. 6. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-70B - INJECTOR NO. 6 CONTROL CIRCUIT

Note. Perform TEST TC-70A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. On 3.3L Compressed Natural Gas (CNG), perform TEST TC-70D. On 3.3L gasoline, ensure ignition is off. Disconnect connectors at injector wiring harness. Injector wiring harness is located at end of valve cover, near transaxle oil dipstick tube. Note which side of injector wiring harness connector goes to the injectors and which side goes to the Powertrain Control Module (PCM). NOTE: Injector side of injector wiring harness is the male side of injector wiring harness. The PCM side of injector wiring harness side is the female side of the injector wiring harness. Injector side of injector wiring harness slides into the PCM side of injector wiring harness.
2. Using ohmmeter, check resistance between terminals No. 13 (Brown/Dark Blue wire) and No. 1 (Dark Green/Orange wire) on injector side (male side) of injector wiring harness. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, perform TEST TC-70C.
3. Using ohmmeter, check resistance between ground and terminal No. 13 (Brown/Dark Blue wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, repair short to ground on Brown/Dark Blue wire to injector No. 6. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
4. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on PCM side (female side) of injector wiring harness.
5. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
6. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
7. Using ohmmeter, check resistance between ground and PCM connector terminal No. 14 (Brown/Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in Brown/Dark Blue wire between PCM and injector No. 6. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
8. Using ohmmeter, check resistance between terminal No. 13 (Brown/Dark Blue wire) on PCM side (female side) of injector wiring harness and PCM connector terminal No. 14 (Brown/Dark Blue wire). If resistance is 5 ohms or more, repair open circuit in Brown/Dark Blue wire. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-70C - INJECTOR NO. 6 CONTROL CIRCUIT

Note. Perform TEST TC-70A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector at injector No. 6. Injector No. 6 is third injector back from front (timing chain end) of engine on right side when viewed from flywheel end of engine. This injector is located above cylinder No. 5, but delivers fuel to cylinder No. 6, due to crossflow intake manifold. It may be necessary to remove air intake plenum for access to connector at injector No. 6.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 6. If resistance is 10-16 ohms, go to next step. If resistance is not 10-16 ohms, replace injector. Perform TEST VER-2A.
3. Using ohmmeter, check resistance between terminal No. 2 (Brown/Dark Blue wire) on connector for injector No. 6 and terminal No. 13 (Brown/Dark Blue wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Brown/Dark Blue wire. Perform TEST VER-2A.
4. Using ohmmeter, check resistance between ground and terminal No. 13 (Brown/Dark Blue wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, repair short to ground on Brown/Dark Blue wire to injector No. 6. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
5. Reconnect injector wiring harness connectors. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 6.
6. If voltage cycles from high voltage to low voltage, replace Powertrain Control Module (PCM). Perform TEST VER-2A. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.

TEST TC-70D - INJECTOR NO. 6 CONTROL CIRCUIT

Note. Perform TEST TC-70A before proceeding. Test applies only to 3.3L Compressed Natural Gas (CNG). For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connectors at injector wiring harness. Injector wiring harness is located at end of valve cover, near transaxle oil dipstick tube. Note which side of injector wiring harness connector goes to the injectors and which side goes to the Powertrain Control Module (PCM). NOTE: Injector side of injector wiring harness is the male side of injector wiring harness. The PCM side of injector wiring harness side is the female side of the injector wiring harness. Injector side of injector wiring harness slides into the PCM side of injector wiring harness.
2. Using ohmmeter, check resistance between terminals No. 1 (Dark Green/Orange wire) and No. 13 (Brown/Dark Blue wire) on injector side (male side) of injector wiring harness. If resistance is 3-6 ohms, go to next step. If resistance is not 3-6 ohms, perform TEST TC-70E.
3. Using ohmmeter, check resistance between ground and terminal No. 13 (Brown/Dark Blue wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, repair short to ground on Brown/Dark Blue wire to injector No. 6. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
4. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on PCM side (female side) of injector wiring harness.
5. If voltage cycles from high voltage to low voltage, go to next step. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
6. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
7. Using ohmmeter, check resistance between ground and PCM connector terminal No. 14 (Brown/Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in Brown/Dark Blue wire between PCM and injector No. 6. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
8. Using ohmmeter, check resistance between terminal No. 13 (Brown/Dark Blue wire) on PCM side (female side) of injector wiring harness and PCM connector terminal No. 14 (Brown/Dark Blue wire). If resistance is 5 ohms or more, repair open circuit in Brown/Dark Blue wire. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-70E - INJECTOR NO. 6 CONTROL CIRCUIT

Note. Perform TEST TC-70A before proceeding. Test applies only to 3.3L Compressed Natural Gas (CNG). For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector at injector No. 6. Injector No. 6 is third injector back from front (timing chain end) of engine on right side when viewed from flywheel end of engine. This injector is located above cylinder No. 5, but delivers fuel to cylinder No. 6, due to crossflow intake manifold. It may be necessary to remove air intake plenum for access to connector at injector No. 6.
2. Using ohmmeter, check resistance between electrical terminals on injector No. 6. If resistance is 3-6 ohms, go to next step. If resistance is not 3-6 ohms, replace injector. Perform TEST VER-2A.
3. Using ohmmeter, check resistance between terminal No. 2 (Brown/Dark Blue wire) on connector for injector No. 6 and terminal No. 13 (Brown/Dark Blue wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Brown/Dark Blue wire. Perform TEST VER-2A.
4. Using ohmmeter, check resistance between ground and terminal No. 13 (Brown/Dark Blue wire) on injector side (male side) of injector wiring harness. If resistance is less than 5 ohms, repair short to ground on Brown/Dark Blue wire to injector No. 6. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
5. Reconnect injector wiring harness connectors. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 6.
6. If voltage cycles from high voltage to low voltage, replace Powertrain Control Module (PCM). Perform TEST VER-2A. If voltage does not cycle from high voltage to low voltage, repair open circuit in Dark Green/Orange wire from ASD relay. Perform TEST VER-2A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.

TEST TC-90A - A/C PRESSURE SENSOR VOLTS TOO HIGH

Note. A/C pressure sensor may also be referred to as A/C pressure switch or A/C pressure transducer. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, read A/C pressure sensor voltage. If A/C pressure sensor voltage is more than 4.6 volts, go to step 6). If A/C pressure sensor voltage is 4.6 volts or less, go to next step.
2. Wiggle wiring harness and connector from Powertrain Control Module (PCM) to A/C pressure sensor while monitoring A/C pressure sensor voltage. The PCM is located between driver's side front fender and power distribution center, near battery. The A/C pressure sensor is located on A/C refrigerant line on firewall, near front of generator and contains a Gray 4-pin connector.
3. If A/C pressure sensor voltage changes while wiggling wiring harness, repair wiring harness as necessary. Perform TEST VER-2A. If A/C pressure sensor voltage does not change while wiggling wiring harness, go to next step.
4. Conditions required to set DTC are not present at this time. The A/C pressure sensor informs PCM if A/C system pressure is too high or too low. DTC may be stored in PCM when A/C pressure sensor voltage at PCM terminal No. 42 is more than 4.9 volts. Possible causes are: sensor signal open, sensor internally open, defective PCM, open sensor ground, defective connector terminals or wiring. Go to next step.
5. Check for defective wiring or connections at PCM and A/C pressure sensor. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
6. Disconnect connector at A/C pressure sensor. The A/C pressure sensor is located on A/C refrigerant line on firewall, near front of generator and contains a Gray 4-pin connector.
7. Using voltmeter, check voltage at terminal No. 4 (Dark Blue wire) on connector for A/C pressure sensor. If voltage is one volt or less, go to next step. If voltage is more than one volt, repair short to voltage on Dark Blue wire. Perform TEST VER-2A.
8. Connect jumper wire between terminals No. 4 (Dark Blue wire) and No. 2 (Black/Light Blue wire) on connector for A/C pressure sensor. Using scan tool, read A/C pressure sensor voltage.
9. If A/C pressure sensor voltage is less than one volt, replace A/C pressure sensor. Perform TEST VER-2A. If A/C pressure sensor voltage is one volt or more, go to next step.
10. Disconnect jumper wire from terminal No. 2 (Black/Light Blue wire) on connector for A/C pressure sensor. Reconnect jumper wire on engine ground with other end still connected to terminal No. 4 (Dark Blue wire) on connector for A/C pressure sensor. Using scan tool, read A/C pressure sensor voltage.
11. If A/C pressure sensor voltage is one volt or more, go to next step. If A/C pressure sensor voltage is less than one volt, repair open circuit in Black/Light Blue wire between PCM and A/C pressure sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
12. Ensure ignition is off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
13. Using ohmmeter, check resistance between terminal No. 4 (Dark Blue) wire on connector for A/C pressure sensor and PCM connector terminal No. 42 (Dark Blue wire). If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Dark Blue wire between PCM and A/C pressure sensor. Perform TEST VER-2A.

TEST TC-91A - A/C PRESSURE SENSOR VOLTS TOO LOW

Note. A/C pressure sensor may also be referred to as A/C pressure switch or A/C pressure transducer. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, read A/C pressure sensor voltage. If A/C pressure sensor voltage is less than .2 volt, go to step 6). If A/C pressure sensor voltage is .2 volt or more, go to next step.
2. Wiggle wiring harness and connector from Powertrain Control Module (PCM) to A/C pressure sensor while monitoring A/C pressure sensor voltage. The PCM is located between driver's side front fender and power distribution center, near battery. The A/C pressure sensor is located on A/C refrigerant line on firewall, near front of generator and contains a Gray 4-pin connector.
3. If A/C pressure sensor voltage changes while wiggling wiring harness, repair wiring harness as necessary. Perform TEST VER-2A. If A/C pressure sensor voltage does not change while wiggling wiring harness, go to next step.
4. Conditions required to set DTC are not present at this time. The A/C pressure sensor informs PCM if A/C system pressure is too high or too low. DTC may be stored in PCM when A/C pressure sensor voltage at PCM terminal No. 42 decreases to less than .5 volt or remains less than .098 volt. Possible causes are: sensor signal shorted to ground, sensor internally shorted, defective PCM, defective connector terminals or wiring. Go to next step.
5. Check for defective wiring or connections at PCM and A/C pressure sensor. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
6. Disconnect connector at A/C pressure sensor. The A/C pressure sensor is located on A/C refrigerant line on firewall, near front of generator and contains a Gray 4-pin connector.
7. Using voltmeter, check voltage at terminal No. 1 (Violet/White wire) on connector for A/C pressure sensor. If voltage is 4.9 volts or less, repair open circuit in Violet/White wire between PCM and A/C pressure sensor. Perform TEST VER-2A. If voltage is more than 4.9 volts, go to next step.
8. Using scan tool, read A/C pressure sensor voltage with connector disconnected at A/C pressure sensor. If A/C pressure sensor voltage is more than 4.5 volts, replace A/C pressure sensor. Perform TEST VER-2A. If A/C pressure sensor voltage is 4.5 volts or less, go to next step.
9. Ensure ignition is off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
10. Using ohmmeter, check resistance between ground and terminal No. 4 (Dark Blue) wire on connector for A/C pressure sensor. If resistance is less than 5 ohms, repair short to ground in Dark Blue wire between PCM and A/C pressure sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
11. Using ohmmeter, check resistance between terminals No. 4 (Dark Blue wire) and No. 2 (Black/Light Blue wire) on connector for A/C pressure sensor. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A. If resistance is less than 5 ohms, repair short between Dark Blue wire and Black/Light Blue wire for A/C pressure sensor. Perform TEST VER-2A.

TEST TC-94A - CNG TEMP. SENSOR VOLTAGE TOO LOW

Note. Test applies only to 3.3L Compressed Natural Gas (CNG). For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Scheme 137

1. Using scan tool, read fuel temperature sensor voltage. If fuel temperature sensor voltage is less than.29 volt, go to step 6). If fuel temperature sensor voltage is.29 volt or more, go to next step.
2. Wiggle wiring harness and connector from Powertrain Control Module (PCM) to fuel temperature sensor while monitoring fuel temperature sensor voltage. The PCM is located between driver's side front fender and power distribution center, near battery. Fuel temperature sensor is located on fuel rail. (Scheme 137) (Scheme 137): Locating Fuel Temp. Sensor, Fuel Pressure Sensor & Fuel Pressure Test Port (3.3L CNG)
3. If fuel temperature sensor voltage changes while wiggling wiring harness, repair wiring harness as necessary. Perform TEST VER-2A. If fuel temperature sensor voltage does not change while wiggling wiring harness, go to next step.
4. Conditions required to set DTC are not present at this time. Fuel temperature sensor delivers input signal to PCM to indicate fuel temperature. DTC may be stored in PCM when fuel temperature sensor voltage at PCM terminal No. 37 decreases to less than.51 volt. Possible causes are: sensor signal shorted to ground, sensor internally shorted, defective PCM, defective connector terminals or wiring. Go to next step.
5. Check for defective wiring or connections at PCM and fuel temperature sensor. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
6. Disconnect connector at fuel temperature sensor located on fuel rail. (Scheme 137) Using scan tool, read fuel temperature sensor voltage.
7. If fuel temperature sensor voltage is more than 4 volts, release fuel pressure and replace fuel temperature sensor. Perform TEST VER-2A. If fuel temperature sensor voltage is 4 volts or less, go to next step.
8. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
9. Using ohmmeter, check resistance between ground and terminal No. 1 (Tan/Pink wire) on connector for fuel temperature sensor. If resistance is less than 5 ohms, repair short to ground in Tan/Pink wire between PCM and fuel temperature sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
10. Using ohmmeter, check resistance between terminals No. 1 (Tan/Pink wire) and No. 2 (Black/Light Blue wire) on connector for fuel temperature sensor. If resistance is less than 5 ohms, repair short between Tan/Pink wire and Black/Light Blue wire for fuel temperature sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A.

TEST TC-95A - CNG TEMP. SENSOR VOLTAGE TOO HIGH

Note. Test applies only to 3.3L Compressed Natural Gas (CNG). For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, read fuel temperature sensor voltage. If fuel temperature sensor voltage is more than 4.6 volts, go to step 6). If fuel temperature sensor voltage is 4.6 volts or less, go to next step.
2. Wiggle wiring harness and connector from Powertrain Control Module (PCM) to fuel temperature sensor while monitoring fuel temperature sensor voltage. The PCM is located between driver's side front fender and power distribution center, near battery. Fuel temperature sensor is located on fuel rail. (Scheme 137)
3. If fuel temperature sensor voltage changes while wiggling wiring harness, repair wiring harness as necessary. Perform TEST VER-2A. If fuel temperature sensor voltage does not change while wiggling wiring harness, go to next step.
4. Conditions required to set DTC are not present at this time. The fuel temperature sensor delivers input signal to PCM to indicate fuel temperature. DTC may be stored in PCM when fuel temperature sensor voltage at PCM terminal No. 37 increases to more than 4.96 volts. Possible causes are: sensor signal open, sensor internally open, sensor ground circuit open, defective PCM, defective connector terminals or wiring. Go to next step.
5. Check for defective wiring or connections at PCM and fuel temperature sensor. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
6. Disconnect connector at fuel temperature sensor located on fuel rail. (Scheme 137) Connect jumper wire between terminals No. 1 (Tan/Pink wire) and No. 2 (Black/Light Blue wire) on connector for fuel temperature sensor. Using scan tool, read fuel temperature sensor voltage.
7. If fuel temperature sensor voltage is less than one volt, release fuel pressure and replace fuel temperature sensor. Perform TEST VER-2A. If fuel temperature sensor voltage is one volt or more, go to next step.
8. Remove jumper wire from terminal No. 2 (Black/Light Blue wire) and reconnect jumper wire to engine ground. Ensure remaining end of jumper wire is still connected to terminal No. 1 (Tan/Pink wire) on connector for fuel temperature sensor. Using scan tool, read fuel temperature sensor voltage.
9. If fuel temperature sensor voltage is less than one volt, repair open circuit in Black/Light Blue wire between PCM and fuel temperature sensor. Perform TEST VER-2A. If fuel temperature sensor voltage is one volt or more, go to next step.
10. Ensure ignition is off. Remove jumper wire. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
11. Using ohmmeter, check resistance between terminal No. 1 (Tan/Pink wire) on connector for fuel temperature sensor and PCM connector terminal No. 37 (Tan/Pink wire). If resistance is 5 ohms or more, repair open circuit on Tan/Pink wire between fuel temperature sensor and PCM. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-96A - NO CCD MESSAGES FROM TRANSMISSION CONTROL MODULE (TCM)

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Connect scan tool to data link connector. Turn ignition on. Select TRANSMISSION and then 41TE on scan tool. Scan tool automatically performs a self-test on the CCD bus. If scan tool displays BUS OPERATIONAL, go to next step. If scan tool displays does not display BUS OPERATIONAL and a CCD bus failure message such as SHORT TO BATTERY or SHORT TO GROUND is displayed, see appropriate VEHICLE COMMUNICATIONS article in ACCESSORIES & EQUIPMENT section.
2. Select ENGINE MODULE on scan tool. Using scan tool, clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Raise and support vehicle so all wheels are off the ground.
3. Start engine and allow engine to idle. Place shift lever in Drive, allowing front wheels to rotate for one minute. Apply brakes. Place shift lever in Park. Using scan tool, check for stored DTCs.
4. If scan tool displays NO CCD MESSAGE FROM TCM, go to step 8). If scan tool does not display NO CCD MESSAGE FROM TCM, go to next step.
5. Conditions required to set DTC are not present at this time. The PCM and TCM communicate messages across the CCD bus, as information from either module is needed to operate their respective systems. DTC may be stored in PCM when no CCD bus messages are received from TCM for 10 seconds. Possible causes are: open circuit in CCD bus, TCM is not powered up, defective TCM or defective PCM.
6. Check for defective wiring or connections at PCM and TCM. The PCM is located between driver's side front fender and power distribution center, near battery. The TCM is located on passenger's side front corner of engine compartment, on inner fender, near windshield washer reservoir. see scheme 51 see scheme 51: Locating Transmission Control Module (TCM)
7. If wiring or connectors are damaged, repair as necessary. Perform TEST VER-2A. If wiring and connectors are not damaged, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
8. Ensure ignition is off. Disconnect connectors at PCM and TCM. The PCM is located between driver's side front fender and power distribution center, near battery. The TCM is located on passenger's side front corner of engine compartment, on inner fender, near windshield washer reservoir. see scheme 51
9. Using ohmmeter, check resistance between PCM connector terminal No. 59 (Violet/Brown wire) and TCM connector terminal No. 43 (Violet/Brown wire). If resistance is 5 ohms or more, repair open circuit in Violet/Brown wire between PCM and TCM. Perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
10. Using ohmmeter, check resistance between PCM connector terminal No. 60 (White/Black wire) and TCM connector terminal No. 4 (White/Black wire). If resistance is 5 ohms or more, repair open circuit in White/Black wire between PCM and TCM. Perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
11. Reinstall connectors on PCM and TCM. Turn ignition on. Select TRANSMISSION and then 41TE on scan tool. If scan tool displays NO RESPONSE, replace TCM. Perform TEST VER-2A. If scan tool does not display NO RESPONSE, replace PCM. Perform TEST VER-2A.

TEST TC-97A - NO CCD MESSAGE FROM BODY CONTROL MODULE (BCM)

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Scheme 138

1. Using scan tool, clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Start engine and allow engine to idle for one minute.
2. Using scan tool, check for stored DTCs. If scan tool displays NO CCD MESSAGE FROM BODY CONTROL MODULE, go to step 6). If scan tool does not display NO CCD MESSAGE FROM BODY CONTROL MODULE, go to next step.
3. Conditions required to set DTC are not present at this time. The PCM and BCM communicate messages across the CCD bus, as information from either module is needed to operate their respective systems. DTC may be stored in PCM when no CCD bus messages are received from BCM for 30 seconds. Possible causes are: open circuit on CCD bus, BCM not powered up, defective BCM or defective PCM.
4. Check for defective wiring or connections at PCM and BCM. The PCM is located between driver's side front fender and power distribution center, near battery. The BCM is located behind junction block, just to the left of brake pedal. (Scheme 138) (Scheme 138): Locating BCM
5. If wiring or connectors are damaged, repair as necessary. Perform TEST VER-2A. If wiring and connectors are not damaged, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
6. Ensure ignition is off. Disconnect connectors at PCM and BCM. The PCM is located between driver's side front fender and power distribution center, near battery. The BCM is located on behind junction block, just to the left of brake pedal. (Scheme 138)
7. Using ohmmeter, check resistance between PCM connector terminal No. 59 (Violet/Brown wire) and BCM connector "A" (Black colored connector) terminal No. 3 (Violet/Brown wire). If resistance is 5 ohms or more, repair open circuit in Violet/Brown wire between PCM and BCM. Perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
8. Using ohmmeter, check resistance between PCM connector terminal No. 60 (White/Black wire) and BCM connector "A" (Black colored connector) terminal No. 34 (White/Black wire). If resistance is 5 ohms or more, repair open circuit in White/Black wire between PCM and BCM. Perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
9. Reinstall connectors on BCM. Turn ignition on. Select BODY CONTROL MODULE on scan tool. If scan tool displays NO RESPONSE, replace BCM. Perform TEST VER-2A. If scan tool does not display NO RESPONSE, replace PCM. Perform TEST VER-2A.

TEST TC-98A - CNG PRESSURE SENSOR VOLTAGE TOO HIGH

Note. Test applies only to 3.3L Compressed Natural Gas (CNG). Pressure sensor may be referred to as fuel pressure sensor or fuel low-pressure sensor. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Turn ignition off. Ensure ignition is off for at least 10 seconds.
2. Attempt to start engine and allow engine to idle. Using scan tool, check for stored DTCs. If DTC is set to indicate CNG PRESSURE SENSOR VOLTAGE TOO HIGH, go to step 9). If no DTC is set to indicate CNG PRESSURE SENSOR VOLTAGE TOO HIGH, go to next step.
3. Wiggle wiring harness and connector from PCM to fuel pressure sensor while using scan tool to monitor fuel pressure sensor voltage. The PCM is located between driver's side front fender and power distribution center, near battery. Fuel pressure sensor is located on fuel rail. (Scheme 138)
4. If fuel pressure sensor voltage changes while wiggling wiring harness, repair wiring harness as necessary. Perform TEST VER-2A. If fuel pressure sensor voltage does not change while wiggling wiring harness, go to next step.
5. Using scan tool, recheck for stored DTCs. If DTC is now set to indicate CNG PRESSURE SENSOR VOLTAGE TOO HIGH, repair wiring harness as necessary that caused DTC to be set. Perform TEST VER-2A. If no DTC is set to indicate CNG PRESSURE SENSOR VOLTAGE TOO HIGH, go to next step.
6. Conditions required to set DTC are not present at this time. Fuel pressure sensor delivers a 0-5 volt input signal to PCM to indicate fuel pressure. Low voltage input signal exists if fuel pressure is high, and a higher voltage input signal exists when fuel pressure is low. Go to next step.
7. DTC may be stored in PCM when fuel pressure sensor voltage at PCM terminal No. 54 increases to more than 4.96 volts. Possible causes are: sensor signal open, sensor internally open, sensor ground circuit open, defective PCM, defective connector terminals or wiring. Go to next step.
8. Check for defective wiring or connections at PCM and fuel pressure sensor. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
9. Disconnect connector at fuel pressure sensor located on fuel rail. (Scheme 138) Using voltmeter, check voltage at terminal No. 3 (Dark Green/Light Blue wire) on connector for fuel pressure sensor. If voltage is one volt or more, go to next step. If voltage is less than one volt, release fuel pressure and replace fuel pressure sensor. Perform TEST VER-2A.
10. Turn ignition off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
11. Turn ignition on. Using voltmeter, check voltage between terminals No. 3 (Dark Green/Light Blue wire) and No. 1 (Black/Light Blue wire) on connector for fuel pressure sensor. If voltage is one volt or less, replace PCM. Perform TEST VER-2A. If voltage is more than one volt, repair short to voltage on Dark Green/Light Blue wire between PCM and fuel pressure sensor. Perform TEST VER-2A.

TEST TC-99A - CNG PRESSURE SENSOR VOLTAGE TOO LOW

Note. Test applies only to 3.3L Compressed Natural Gas (CNG). Pressure sensor may be referred to as fuel pressure sensor or fuel low-pressure sensor. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Ensure ignition is off for at least 10 seconds.
2. Attempt to start engine and allow engine to idle. Using scan tool, check for stored DTCs. If DTC is set to indicate CNG PRESSURE SENSOR VOLTAGE TOO LOW, go to step 9). If no DTC is set to indicate CNG PRESSURE SENSOR VOLTAGE TOO LOW, go to next step.
3. Wiggle wiring harness and connector from PCM to fuel pressure sensor while using scan tool to monitor fuel pressure sensor voltage. The PCM is located between driver's side front fender and power distribution center, near battery. Fuel pressure sensor is located on fuel rail. (Scheme 138)
4. If fuel pressure sensor voltage changes while wiggling wiring harness, repair wiring harness as necessary. Perform TEST VER-2A. If fuel pressure sensor voltage does not change while wiggling wiring harness, go to next step.
5. Using scan tool, recheck for stored DTCs. If DTC is now set to indicate CNG PRESSURE SENSOR VOLTAGE TOO LOW, repair wiring harness as necessary that caused DTC to be set. Perform TEST VER-2A. If no DTC is set to indicate CNG PRESSURE SENSOR VOLTAGE TOO LOW, go to next step.
6. Conditions required to set DTC are not present at this time. Fuel pressure sensor delivers a 0-5 volt input signal to PCM to indicate fuel pressure. Low voltage input signal exists if fuel pressure is high, and a higher voltage input signal exists when fuel pressure is low. Go to next step.
7. DTC may be stored in PCM when fuel pressure sensor voltage at PCM terminal No. 54 decreases to less than.49 volt. Possible causes are: sensor signal shorted to ground, sensor internally open, sensor 5-volt supply circuit is open, defective PCM, defective connector terminals or wiring. Go to next step.
8. Check for defective wiring or connections at PCM and fuel pressure sensor. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
9. Disconnect connector at fuel pressure sensor located on fuel rail. (Scheme 138) Using voltmeter, check voltage between terminals No. 3 (Dark Green/Light Blue wire) and No. 1 (Black/Light Blue wire) on connector for fuel pressure sensor.
10. If voltage is more than 4 volts, release fuel pressure and replace fuel pressure sensor. Perform TEST VER-2A. If voltage is 4 volts or less, go to next step.
11. Ensure ignition is off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
12. Using ohmmeter, check resistance between terminals No. 1 (Black/Light Blue wire) and No. 2 (Violet/White wire) on connector for fuel pressure sensor. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short between Black/Light Blue and Violet/White wires for fuel pressure sensor. Perform TEST VER-2A.
13. Using ohmmeter, check resistance between ground and terminal No. 3 (Dark Green/Light Blue wire) on connector for fuel pressure sensor. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Dark Green/Light Blue between PCM and fuel pressure sensor. Perform TEST VER-2A.
14. Using ohmmeter, check resistance between terminal No. 2 (Violet/White wire) on connector for fuel pressure sensor and PCM connector terminal No. 61 (Violet/White wire). If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Violet/White wire between PCM and fuel pressure sensor. Perform TEST VER-2A.

TEST TC-101A - FUEL PUMP RELAY CONTROL CIRCUIT

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Note. On 3.3L Compressed Natural Gas (CNG) models, fuel pump relay may be referred to as high pressure shutoff relay.

Scheme 139

Scheme 140

1. Using scan tool, actuate fuel pump relay and listen for clicking sound at fuel pump relay. Fuel pump relay is located in power distribution center at driver's side front corner of engine compartment, near battery. (Scheme 139)
2. If no clicking sound is heard at fuel pump relay, go to step 5). If clicking sound is heard at fuel pump relay, conditions required to set DTC at this time are not present. Fuel pump relay provides voltage to fuel pump (gasoline models) or high pressure fuel shutoff solenoid (CNG models). DTC may be stored in Powertrain Control Module (PCM) if an open or shorted condition is detected in fuel pump relay control circuit. Possible causes are: relay coil open or shorted, fused ignition switch output circuit open, fuel pump relay control circuit open or shorted, inoperative circuit driver in PCM, defective connector terminals or wiring. Go to next step.
3. Check for defective wiring or connections at fuel pump relay and PCM. The PCM is located between driver's side front fender and power distribution center, near battery. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, use scan tool to actuate fuel pump relay. Wiggle wiring harness from fuel pump relay to PCM.
4. If clicking sound at fuel pump relay quits or becomes erratic while wiggling wiring harness, repair wiring as necessary. Perform TEST VER-2A. If clicking sound at fuel pump relay does not quit or become erratic, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
5. Remove fuel pump relay from power distribution center. (Scheme 139) Using voltmeter, check voltage at cavity "A" (White/Black wire) for fuel pump relay in power distribution center. (Scheme 139) (Scheme 139): Locating Fuel Pump Relay & Identifying Power Distribution Center Cavities
6. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in fused ignition switch output circuit (White/Black wire) to fuel pump relay. White/Black wire goes from fuel pump relay in power distribution center to Positive Temperature Coefficient (PTC) No. 1 in junction block, located behind driver's side of instrument panel, to the left of steering column. The PTC receives voltage when ignition is on. Once open circuit is repaired, perform TEST VER-2A. NOTE: The PTC is a specified amperage solid-state circuit breaker located in junction box. The PTC may reset when all current is removed from PTC for approximately 20 seconds.
7. Using ohmmeter, check resistance between terminals No. 85 and 86 on fuel pump relay. (Scheme 140) If resistance is less than 100 ohms, go to next step. If resistance is 100 ohms or more, replace fuel pump relay. Perform TEST VER-2A. (Scheme 140): Identifying Fuel Pump Relay Terminals
8. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
9. Using ohmmeter, check resistance between ground and PCM connector terminal No. 74 (Brown wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Brown wire between PCM and fuel pump relay. Perform TEST VER-2A.
10. Using ohmmeter, check resistance between cavity "C" (Brown wire) for fuel pump relay on power distribution center and PCM connector terminal No. 74 (Brown wire). (Scheme 139)
11. If resistance is 5 ohms or more, repair open circuit in Brown wire between PCM and fuel pump relay. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-102A - UPSTREAM O2 SENSOR SLOW RESPONSE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. This Diagnostic Trouble Code (DTC) may be stored in Powertrain Control Module (PCM) if voltage on upstream oxygen sensor, mounted on the exhaust manifold, is switching from less than .39 volt to more than .6 volt fewer times than required. Possible causes are: dirt/moisture or grease inside connector, exhaust leak, fuel contamination or engine mechanical problem. Go to next step.
2. Start engine. Check for exhaust leaks between engine and catalytic converter. If no exhaust leaks exist, go to next step. If exhaust leaks exist, repair as necessary. Perform TEST VER-5A.
3. Check exhaust for excessive smoke caused by coolant entering combustion chambers or high oil consumption. If no excessive smoke is caused by coolant entering combustion chambers or high oil consumption, go to next step. If excessive smoke is caused by coolant entering combustion chambers or high oil consumption, repair engine as necessary and replace catalytic converter. Perform TEST VER-5A.
4. Ensure ignition is off. Disconnect connector at upstream oxygen sensor mounted on the exhaust manifold. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-5A. If terminals are not pushed out, miswired or damaged, go to next step.
5. Using ohmmeter, check resistance between ground and terminal No. 3 (Black/Light Blue wire) on connector for upstream oxygen sensor. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Black/Light Blue wire between PCM and upstream oxygen sensor. The PCM is located between driver's side front fender and power distribution center, near battery. Perform TEST VER-5A.
6. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
7. Inspect connectors for damaged terminals. If connectors or terminals are damaged, repair as necessary. Perform TEST VER-5A. If connectors and terminals are not damaged, replace upstream oxygen sensor. Perform TEST VER-5A.

TEST TC-103A - UPSTREAM O2 SENSOR HEATER FAILURE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Scheme 141

1. Using scan tool, check for stored Diagnostic Trouble Codes (DTCs). If DTCs exist that are related to the upstream oxygen sensor, refer to appropriate test for the specified DTC. If no DTCs exist that are related to the upstream oxygen sensor, go to next step.
2. Turn ignition on with engine off. Wait 3 minutes and then use scan tool to monitor upstream oxygen sensor voltage for a few minutes. Once upstream oxygen sensor voltage stabilizes between.4 and.6 volt, use scan tool to actuate upstream oxygen sensor heater test while monitoring upstream oxygen sensor voltage for at least 2 minutes.
3. If upstream oxygen sensor voltage does not remain at.4-.6 volt, go to next step. If upstream oxygen sensor voltage remains at.4-.6 volt, go to step 6).
4. If referred to this test from TEST TC-118A, return to TEST TC-118A and continue test procedure. If not referred to this test from TEST TC-118A, go to next step.
5. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) if no upstream oxygen sensor signal is received when PCM powers up the upstream oxygen sensor heater. Possible causes are: open heater element circuit, upstream oxygen sensor failure, defective PCM, dirt/moisture or grease inside connector, defective connector terminals or wiring, defective Auto Shutdown (ASD) relay. Stop upstream oxygen sensor heater test. Test is complete. Perform TEST VER-5A.
6. Disconnect connector at upstream oxygen sensor mounted on the exhaust manifold. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-5A. If terminals are not pushed out, miswired or damaged, go to next step.
7. Using voltmeter, check voltage at terminal No. 2 (Dark Green/Orange wire) on wiring harness side of connector for upstream oxygen sensor while still performing upstream oxygen sensor heater test.
8. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in Dark Green/Orange wire from Auto Shutdown (ASD) relay. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. Perform TEST VER-5A.
9. Stop upstream oxygen sensor heater test. Using ohmmeter, check resistance of upstream oxygen sensor heater between terminals No. 1 and 2 (White wires) on oxygen sensor side of connector for upstream oxygen sensor. (Scheme 141) If resistance is 4-7 ohms, go to next step. If resistance is not 4-7 ohms, replace upstream oxygen sensor. Perform TEST VER-5A. (Scheme 141): Checking Oxygen Sensor Heater Resistance
10. Using ohmmeter, check resistance between ground and terminal No. 1 (Black wire) on wiring harness side of connector for upstream oxygen sensor. If resistance is less than 5 ohms, replace upstream oxygen sensor. Perform TEST VER-5A. If resistance is 5 ohms or more, repair open circuit in Black wire and ground. Perform TEST VER-5A.

TEST TC-105A - DOWNSTREAM O2 SENSOR HEATER FAILURE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, check for stored Diagnostic Trouble Codes (DTCs). If DTCs exist that are related to the downstream oxygen sensor, refer to appropriate test for the specified DTC. If no DTCs exist that are related to the downstream oxygen sensor, go to next step.
2. Turn ignition on with engine off. Wait 3 minutes and then use scan tool to monitor downstream oxygen sensor voltage for a few minutes. Once downstream oxygen sensor voltage stabilizes between.4 and.6 volt, use scan tool to actuate downstream oxygen sensor heater test while monitoring downstream oxygen sensor voltage for at least 2 minutes.
3. If downstream oxygen sensor voltage still remains at.4-.6 volt, go to step 5). If downstream oxygen sensor voltage does not remain at.4-.6 volt, go to next step.
4. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) if no downstream oxygen sensor signal is received when PCM powers up the downstream oxygen sensor heater. Possible causes are: open heater element circuit, downstream oxygen sensor failure, defective PCM, defective connector terminals or wiring. Stop downstream oxygen sensor heater test. Test is complete. Perform TEST VER-5A.
5. Disconnect connector at downstream oxygen sensor mounted on exhaust pipe, behind catalytic converter. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-5A. If terminals are not pushed out, miswired or damaged, go to next step.
6. Using voltmeter, check voltage at terminal No. 2 (Dark Green/Orange wire) on wiring harness side of connector for downstream oxygen sensor while still performing downstream oxygen sensor heater test.
7. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in Dark Green/Orange wire from Auto Shutdown (ASD) relay. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery.
8. Stop downstream oxygen sensor heater test. Using ohmmeter, check resistance of downstream oxygen sensor heater between terminals No. 1 and 2 (White wires) on oxygen sensor side of connector for downstream oxygen sensor. (Scheme 141) If resistance is 4-7 ohms, go to next step. If resistance is not 4-7 ohms, replace downstream oxygen sensor. Perform TEST VER-5A.
9. Using ohmmeter, check resistance between ground and terminal No. 1 (Black wire) on wiring harness side of connector for downstream oxygen sensor. If resistance is less than 5 ohms, replace downstream oxygen sensor. Perform TEST VER-5A. If resistance is 5 ohms or more, repair open circuit in Black wire and ground. Perform TEST VER-5A.

TEST TC-106A - MULTIPLE CYLINDER MISFIRE

1. Using scan tool, check for stored Diagnostic Trouble Codes (DTCs). Repair any other stored DTCs before proceeding with testing for this DTC. Using scan tool, clear DTCs from Powertrain Control Module (PCM).
2. Vehicle must be road tested during this test, as this DTC will only be set during road test. Engine must be at normal operating temperature and the adaptive numerator updated. During road test, stop road test and turn ignition off and back on again and then proceed with road test. NOTE: During road test, sharp maneuvers may temporarily disable the misfire detection.
3. Road test vehicle while driving vehicle at a steady rate at various MAP sensor and engine RPM ranges. Using scan tool, check for stored DTCs. If DTC for multiple cylinder misfire was set again, go to step 7). If DTC for multiple cylinder misfire was not set again, go to next step.
4. If DTC was set for specified cylinder misfire such as cylinder No. 1, 2, 3, 4, 5 or 6 misfire, perform TEST TC-107A. If no DTC was set for specified cylinder misfire, go to next step.
5. Conditions required to set DTC are not present at this time. Misfire is detected by the crankshaft speed fluctuation method. This method compares the engine speed difference between the cylinders in firing order. Engine speed is detected by crankshaft position sensor. An RPM value is set for each cylinder comparison. When an RPM difference of more than 10 RPM occurs between cylinders, a misfire count of one is recorded. The RPM may vary between 1 and 10 depending on engine load. Two types of misfires are detected: a 2-trip misfire, which is about 2 percent result in emissions increase, or a one-trip misfire which is about 10-30 percent which may damage the catalytic converter.
6. DTC may be stored in PCM when more than a 2 percent misfire rate is measured during 2 trips, or with a 10-30 percent misfire during one trip. Possible causes are: defective ignition coil circuit, defective spark plugs or wires, defective fuel pump or fuel filter, defective injectors or wiring harness, engine mechanical problem, restricted exhaust or intake system, defective EGR or EVAP system, defective PCM, contaminated fuel, defective connector terminals or wiring. This may be an intermittent problem, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-5A.
7. Check for proper spark plug wire installation, routing and firing order. If spark plug wires are incorrect, repair as necessary. Perform TEST VER-5A. If spark plug wires are correct, go to next step. NOTE: Firing order is 1-2-3-4-5-6. Cylinder No. 2 is front cylinder on left side of engine when viewed from flywheel end of engine. Cylinder No. 1 is front cylinder on right side of engine when viewed from flywheel end of engine.
8. Turn engine off. Connect engine analyzer. Start engine and allow engine to idle for at least 2 minutes. Using engine analyzer, check secondary ignition pattern. If secondary ignition pattern is defective, repair ignition system as necessary. Perform TEST VER-5A. If secondary ignition pattern is okay, go to next step.
9. Momentarily remove and reinstall spark plug wires from ignition coil one at a time while observing the secondary ignition kilovolt line.
10. If the open circuit secondary ignition voltage for each wire is at least 25 kilovolt, go to next step. If the open circuit secondary ignition voltage for each wire is not at least 25 kilovolt, replace ignition coil. Perform TEST VER-5A.
11. Turn ignition off. Remove all spark plugs and Auto Shutdown (ASD) relay. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. see scheme 56 see scheme 56: Locating ASD Relay & Identifying Power Distribution Center Cavities
12. Check compression on all cylinders. If compression on all cylinders is at least 100 psi (7 kg/cm 2 ) and compression between all cylinders is within 25 percent of each other, go to next step. If compression on all cylinders is not at least 100 psi (7 kg/cm 2 ) and compression between all cylinders is not within 25 percent of each other, repair engine as necessary. Perform TEST VER-5A.
13. Reinstall spark plugs and ASD relay. Start engine and warm engine until engine coolant temperature is more than 180°F (82°C). Using scan tool, monitor spark advance while increasing engine speed to 2000 RPM. If spark advance changes with engine RPM, go to next step. If spark advance does not change with engine RPM, replace PCM. Perform TEST VER-5A. The PCM is located between driver's side front fender and power distribution center, near battery.
14. Turn ignition off. Connect vacuum gauge to engine vacuum source. Start engine and warm engine until engine coolant temperature is at least 180°F (82°C). Apply parking brake. Place shift lever in Neutral.
15. Note vacuum with engine idling. If vacuum is at least 13 in. Hg, go to next step. If vacuum is not at least 13 in. Hg, perform TEST NTC-17A.
16. Monitor vacuum while quickly opening and closing the throttle. If vacuum drops rapidly to zero when throttle was opened, go to next step. If vacuum does not drop rapidly to zero when throttle was opened, repair restricted exhaust system. CAUTION: When connecting fuel pressure gauge on service port at fuel rail, use care, as fuel system may be under pressure.
17. Shut engine off. Release fuel pressure. Connect fuel pressure gauge at service port on fuel rail, using care, as fuel system may be under pressure. Service port is located near center of front (radiator side) fuel rail.
18. Turn ignition on. Using scan tool, actuate fuel system test. Allow time for fuel pressure gauge to stabilize to the normal fuel pressure.
19. Using scan tool, stop fuel system test and monitor fuel pressure for one minute. If fuel pressure drop to less than 10 psi (.7 kg/cm 2 ), perform TEST NTC-3A. If fuel pressure does not drop to less than 10 psi (.7 kg/cm 2 ), go to next step.
20. Inspect air filter and air intake for restrictions. If restrictions exist, repair or replace components as necessary. Perform TEST VER-5A. If no restrictions exist, go to next step.
21. Perform following tests in the order listed. See TESTING SEQUENCE table. If a test passes, proceed to the next test until the problem is found.

TESTING SEQUENCE

TEST TC-107A - CYLINDER NO. 1, 2, 3, 4, 5 OR 6 MISFIRE

1. Using scan tool, check for stored Diagnostic Trouble Codes (DTCs). Repair any other stored DTCs before proceeding with testing for this DTC associated with specified cylinder. If DTC for multiple cylinder misfire exists, ensure repair for this DTC is done before proceeding.
2. A misfire is detected by the crankshaft speed fluctuation method. This method compares the engine speed difference between the cylinders in firing order. Engine speed is detected by crankshaft position sensor. An RPM value is set for each cylinder comparison. When an RPM difference of more than 10 occurs between cylinders, a misfire count of one is recorded. The RPM may vary between 1 and 10 depending on engine load. Two types of misfires are detected: a 2-trip misfire, which is about 2 percent result in emissions increase, or a one-trip misfire which is about 10-30 percent which may damage the catalytic converter.
3. DTC may be stored in Powertrain Control Module (PCM) when more than a 2 percent misfire rate is measured during 2 trips, or with a 10-30 percent misfire during one trip. Possible causes are: defective ignition coil circuit, defective spark plugs or wires, defective injectors, engine mechanical problem, defective PCM, defective connector terminals or wiring. Go to next step.
4. Check for proper spark plug wire installation, routing and firing order. If spark plug wires are incorrect, repair as necessary. Perform TEST VER-5A. If spark plug wires are correct, go to next step. NOTE: Firing order is 1-2-3-4-5-6. Cylinder No. 2 is front cylinder on left side of engine when viewed from flywheel end of engine. Cylinder No. 1 is front cylinder on right side of engine when viewed from flywheel end of engine.
5. Connect engine analyzer. Start engine and allow engine to idle for at least 2 minutes. Using engine analyzer, check secondary ignition pattern. If secondary ignition pattern is defective, repair ignition system as necessary. Perform TEST VER-5A. If secondary ignition pattern is okay, go to next step.
6. Momentarily remove and reinstall spark plug wires from ignition coil one at a time while observing the secondary ignition kilovolt peak line.
7. If the open circuit secondary ignition voltage for each wire is at least 25 kilovolts, go to next step. If the open circuit secondary ignition voltage for each wire is not at least 25 kilovolts, replace ignition coil. Perform TEST VER-5A.
8. Using spray bottle with water, spray spark plug wires while monitoring secondary ignition pattern. If secondary ignition pattern changes with water being applied, replace spark plug wire as necessary. Perform TEST VER-5A. If secondary ignition pattern does not change with water being applied, go to next step.
9. Turn ignition off. Remove all spark plugs and Auto Shutdown (ASD) relay. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. see scheme 57 see scheme 57: Locating ASD Relay & Identifying Power Distribution Center Cavities
10. Check compression on all cylinders. If compression on all cylinders is at least 100 psi (7 kg/cm 2 ) and compression between all cylinders is within 25 percent of each other, go to next step. If compression on all cylinders is not at least 100 psi (7 kg/cm 2 ) and compression between all cylinders is not within 25 percent of each other, repair engine as necessary. Perform TEST VER-5A.
11. Reinstall spark plugs and ASD relay. Start engine and warm engine to normal operating temperature. Using scan tool, perform auto injector kill test while monitoring engine RPM and secondary ignition pattern on specified cylinder that the DTC applies too. If auto injector kill test does not indicate a weak cylinder, go to next step. If auto injector kill test indicates a weak cylinder, check for mechanical problems on specified cylinder. If no mechanical problems exists, replace injector. Perform TEST VER-5A.
12. Using scan tool, monitor spark advance while increasing engine speed to 2000 RPM. If spark advance changes with engine RPM, go to next step. If spark advance does not change with engine RPM, replace PCM. Perform TEST VER-5A. The PCM is located between driver's side front fender and power distribution center, near battery.
13. Turn ignition off. Connect vacuum gauge to engine vacuum source. Start engine and allow engine to idle. Apply parking brake. Place shift lever in Neutral.
14. Note vacuum with engine idling. If vacuum is at least 13 in. Hg, go to next step. If vacuum is not at least 13 in. Hg, perform TEST NTC-17A.
15. Check valve timing, valve train and camshaft lobes on the specified cylinder that DTC applies too. If valve timing is incorrect, valve train is defective or camshaft lobes are defective, repair as necessary. Perform TEST VER-5A. If valve timing is correct, valve train is okay and camshaft lobes are okay, check for Technical Service Bulletins (TSBs) relating to the problem. In no TSBs exists, replace PCM. Perform TEST VER-5A. The PCM is located between driver's side front fender and power distribution center, near battery.

TEST TC-112A - CATALYTIC CONVERTER EFFICIENCY FAILURE

1. Using scan tool, check for stored Diagnostic Trouble Codes (DTCs). If no stored DTCs exist pertaining to any oxygen sensors, go to next step. If any stored DTCs exist pertaining to any oxygen sensors, perform test procedures for that DTC before proceeding.
2. This DTC may be stored in Powertrain Control Module (PCM) as catalytic converter loses the ability to store oxygen and the concentration of oxygen becomes the same downstream (after catalytic converter) as the upstream (before catalytic converter). Output voltage of downstream O2 sensor will become the same as upstream O2 sensor with a time lag seen by the PCM between the switching of the O2 sensors.
3. The Malfunction Indicator Light (MIL) in message center will illuminate after 2 trips and remain on, but goes off if conditions required to set DTC are not found on subsequent trips. Possible causes are: defective catalytic converter, exhaust leaks before catalytic converter, contaminated fuel or engine mechanical problem. Go to next step.
4. Start engine and allow engine to idle. Check for exhaust leaks between engine and downstream oxygen sensor mounted on exhaust pipe, behind catalytic converter. If exhaust leaks exist, repair exhaust leak. Perform TEST VER-5A. If no exhaust leak exists, go to next step.
5. Check exhaust for excessive smoke caused by coolant entering combustion chambers or high oil consumption. If no excessive smoke is caused by coolant entering combustion chambers or high oil consumption, go to next step. If excessive smoke is caused by coolant entering combustion chambers or high oil consumption, repair engine as necessary and replace catalytic converter. Perform TEST VER-5A. NOTE: A newly installed downstream O2 sensor with an existing aging upstream O2 sensor may cause this DTC to be set.
6. Determine if downstream oxygen sensor has been replaced within the last 5000 miles. If downstream oxygen sensor has been not been replaced within the last 5000 miles, replace catalytic converter. Perform TEST VER-5A. If downstream oxygen sensor has been replaced within the last 5000 miles, go to next step.
7. Determine if upstream oxygen sensor has been replaced within the last 5000 miles. If upstream oxygen sensor has been replaced within the last 5000 miles, replace catalytic converter. Perform TEST VER-5A. If upstream oxygen sensor has not been replaced within the last 5000 miles, replace upstream oxygen sensor. Perform TEST VER-5A.

TEST TC-113A - EVAP PURGE FLOW MONITOR FAILURE

Note. Test does not apply to 3.3L Compressed Natural Gas (CNG). EVAP purge solenoid may be referred to as EVAP solenoid.

1. Using scan tool, clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Start engine and warm engine until engine coolant temperature is greater than 169°F (76°C). Shut engine off.
2. Disconnect vacuum hose at EVAP purge solenoid that goes to the EVAP canister. see scheme 58 The EVAP purge solenoid is located near passenger's side strut tower. see scheme 58: Locating EVAP Purge Solenoid & Identifying Vacuum Hoses
3. Start engine. There should be no vacuum at EVAP purge solenoid where the vacuum hose goes to the EVAP canister for 1-2 minutes.
4. If vacuum exists within one minute, replace EVAP purge solenoid. Perform TEST VER-5A. If vacuum does not exist within one minute, go to next step.
5. After 90 seconds, check that vacuum is cycling intermittently at a steady rate. If vacuum is not cycling intermittently at a steady rate, go to step 8). If vacuum is cycling intermittently at a steady rate, go to next step.
6. Turn ignition off. Apply no more than 5 psi (.35 kg/cm 2 ) air pressure on vacuum hose that goes to the EVAP canister. DO NOT exceed 5 psi (.35 kg/cm 2 ) air pressure on vacuum hose. If air will not flow through vacuum hose and EVAP canister, perform TEST TC-113B. If air will flow through vacuum hose and EVAP canister, go to next step.
7. Conditions required to set DTC are not present at this time. The DTC may be stored in PCM if no vacuum flow through EVAP system is detected by the EVAP monitor. Possible causes are: defective vacuum hoses, cracked plastic connector at EVAP purge solenoid, defective EVAP purge solenoid, restricted vacuum hose from EVAP purge solenoid to EVAP canister, restricted vacuum hose from throttle body to EVAP purge solenoid.
8. Disconnect vacuum hose at EVAP purge solenoid that goes to the throttle body. (Scheme 142) Install vacuum gauge on vacuum hose that goes to throttle body.
9. If vacuum gauge indicates manifold vacuum, go to next step. If vacuum gauge does not indicate manifold vacuum, repair or replace vacuum hose or throttle body as necessary. Perform TEST VER-5A.
10. Reinstall vacuum hose on EVAP purge solenoid that goes to the throttle body. Connect vacuum gauge on the port on EVAP purge solenoid that goes to the EVAP canister.
11. If vacuum gauge indicates 3-7 in. Hg of vacuum, go to next step. If vacuum gauge does not indicate 3-7 in. Hg of vacuum, replace EVAP purge solenoid. Perform TEST VER-5A.
12. Using vacuum pump, apply more than 2 in. Hg of vacuum on the vacuum hose that goes to EVAP canister. If vacuum holds steady, go to next step. If vacuum does not hold steady, replace EVAP purge solenoid. Perform TEST VER-5A.
13. Check for restricted vacuum hose to EVAP canister. If vacuum hose is restricted, repair as necessary. Perform TEST VER-5A. If vacuum hose is not restricted, go to next step.
14. Check for restricted fuel tank vent port on top of EVAP canister. (Scheme 142) This is the vent port that goes to the fuel tank. EVAP canister is located on frame rail, directly below the driver's seat. If fuel tank vent port is restricted, clean fuel tank vent port and retest system. Perform TEST VER-5A. If fuel tank vent port is not restricted, replace EVAP canister. Perform TEST VER-5A.

Locating EVAP Canister & Identifying Hoses. Scheme 142

TEST TC-113B - EVAP PURGE FLOW MONITOR FAILURE

Note. Perform TEST TC-113A before proceeding.

1. Disconnect purge vacuum hose at EVAP canister. see scheme 60 The EVAP canister is located on frame rail, directly below the driver's seat. see scheme 60: Locating EVAP Canister & Identifying Hoses
2. Apply air pressure on purge vacuum hose that goes between EVAP canister and EVAP purge solenoid. If no restriction exists on purge vacuum hose, go to next step. If restriction exists on purge vacuum hose between EVAP canister and EVAP purge solenoid, repair vacuum hose and line as necessary. Perform TEST VER-5A.
3. Check for restricted fuel tank vent port on top of EVAP canister. see scheme 60 This is the vent port that goes to the fuel tank. If fuel tank vent port is restricted, clean fuel tank vent port and retest system. Perform TEST VER-5A. If fuel tank vent port is not restricted, replace EVAP canister. Perform TEST VER-5A.

TEST TC-114A - PARK/NEUTRAL SWITCH FAILURE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Note. Park/neutral switch is used on 3-speed models and transmission range sensor is used on 4-speed models. Transmission range sensor may be referred to as park/neutral switch.

Scheme 143

Scheme 144

1. Apply parking brake. Using scan tool, read park/neutral switch state while moving shift lever from Park to Reverse.
2. If scan tool displays P/N and D/R, go to next step. If scan tool does not display P/N and D/R, go to step 6).
3. Conditions required to set DTC are not present at this time. The DTC may be stored in Powertrain Control Module (PCM) when PCM detects incorrect park/neutral switch state for a given mode of vehicle operation. Possible causes are: defective connector terminals or wiring, defective park/neutral switch, transaxle internal problem or defective PCM.
4. Check for defective wiring or connections at PCM and park/neutral switch (3-speed) or transmission range sensor (4-speed) located on side of transaxle. (Scheme 143)and (Scheme 144). The PCM is located between driver's side front fender and power distribution center, near battery. (Scheme 143): Locating Park/Neutral Switch (3-Speed Models) (Scheme 144): Locating Transmission Range Sensor (4-Speed Models)
5. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.
6. Ensure ignition is off. Place shift lever in Park. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
7. Using ohmmeter, check resistance between ground and PCM connector terminal No. 76 (Black/White wire) while moving shift lever from Park to Reverse. If resistance changes from less than 5 ohms to more than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance does not change from less than 5 ohms to more than 5 ohms, go to next step.
8. If resistance does not remain less than 5 ohms at all times, go to next step. If resistance remains less than 5 ohms at all times, repair short to ground in Black/White wire between PCM and park/neutral switch (3-speed) or transmission range sensor (4-speed). Perform TEST VER-2A. Park/neutral switch (3-seed) or transmission range sensor (4-speed) are located on transaxle. (Scheme 143)and (Scheme 144).
9. Disconnect connector at park/neutral switch (3-seed) or transmission range sensor (4-speed) on transaxle. (Scheme 143)and (Scheme 144).
10. Using ohmmeter, check resistance between Black/White wire on connector for park/neutral switch (3-speed) or transmission range sensor (4-speed) and PCM connector terminal No. 76 (Black/White wire). If resistance is less than 5 ohms, replace park/neutral switch (3-speed) or transmission range sensor (4-speed). Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Black/White wire between PCM and park/neutral switch (3-speed) or transmission range sensor (4-speed). Perform TEST VER-2A.

TEST TC-118A - FUEL SYSTEM RICH

1. Using scan tool, check for stored Diagnostic Trouble Codes (DTCs). If no stored DTCs exist pertaining to any oxygen sensors, go to next step. If any stored DTCs exist pertaining to any oxygen sensors, perform test procedures for that DTC before proceeding.
2. This DTC may be stored in Powertrain Control Module (PCM) when PCM determines fuel system is running too rich for at least 2 trips. If this condition exists, Malfunction Indicator Light (MIL) in message center will illuminate and remain on, but goes off if conditions required to set DTC are not found on the following trips.
3. Possible causes are: defective wiring or connectors, defective catalytic converter, defective EGR valve, defective fuel pump, defective injectors, defective fuel pressure regulator, defective MAP sensor, defective upstream oxygen sensor, defective PCM or engine mechanical problems. Go to next step.
4. Perform oxygen sensor heater test. Go to step 2) in TEST TC-103A. If oxygen sensor heater passes the test, go to next step.
5. Turn ignition on with engine off. Using using scan tool, read the long term adaptive memory values. If long term adaptive memory is -20 percent to -38 percent, perform TEST TC-118B. If long term adaptive memory is not -20 percent to -38 percent, condition required to set DTC is not present. Test is complete. Perform TEST VER-5A.

TEST TC-118B - FUEL SYSTEM RICH

Note. Perform TEST TC-118A before proceeding.

1. Check for defective wiring or connections at upstream oxygen sensor, downstream oxygen sensor and Powertrain Control Module (PCM).
2. Upstream oxygen sensor is mounted on exhaust manifold. Downstream oxygen sensor is mounted on exhaust pipe, behind catalytic converter. The PCM is located between driver's side front fender and power distribution center, near battery.
3. Perform following tests in the order listed. See TESTING SEQUENCE table. If a test passes, proceed to the next test until the problem is found.

TESTING SEQUENCE

TEST TC-119A - FUEL SYSTEM LEAN

Note. Very low fuel level could cause this Diagnostic Trouble Code (DTC) to be set. Ensure fuel tank is at least 1/4 full before proceeding.

1. If vehicle ran out of fuel before coming in, use scan tool to clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Perform TEST VER-5A. If vehicle did not run out of fuel before coming in, go to next step.
2. This DTC may be stored in Powertrain Control Module (PCM) when PCM determines fuel system is running too lean for at least 2 trips. If this condition exists, Malfunction Indicator Light (MIL) in message center will illuminate and remain on, but goes off if conditions required to set DTC are not found on the following trips.
3. Possible causes are: defective wiring or connectors, defective catalytic converter, defective fuel pump, defective fuel filter, defective injectors, defective fuel pressure regulator, defective MAP sensor, defective upstream oxygen sensor, defective PCM, defective ignition system, contaminated fuel or engine mechanical problems. Go to next step.
4. Using scan tool, check for stored DTCs. If DTCs exist that are related to a lean condition, refer to appropriate test for the specified DTC. If no DTCs exist that are related to a lean condition, go to next step.
5. Start engine and warm engine until engine coolant temperature is at least 180°F (82°C). Allow engine to idle for at least 20 seconds after reaching normal operating temperature.
6. Check for exhaust leaks between engine and downstream oxygen sensor mounted on exhaust pipe, behind catalytic converter. If no exhaust leaks exist, go to next step. If exhaust leaks exist, repair as necessary. Perform TEST VER-5A.
7. Using scan tool, monitor upstream oxygen sensor state for at least 20 seconds. If oxygen sensor is switching between lean-center-rich at least 2 times within 20 seconds, conditions required to set DTC are not present at this time. Perform TEST VER-5A. If oxygen sensor is not switching between lean-center-rich at least 2 times within 20 seconds, go to next step.
8. With engine running, using scan tool, read the short and long term adaptive memory values. If long term adaptive memory is between +20 percent and +32 percent, go to next step. If long term adaptive memory is not between +20 percent and +32 percent, conditions required to set DTC are not present at this time. Perform TEST VER-5A.
9. Shut engine off. Turn ignition on with engine off. Using scan tool, actuate fuel system test. Visually inspect injectors for leaks.
10. If no leaks exists, stop fuel system test. Perform TEST TC-119B. If leaks exists, stop fuel system test. Replace leaking injector(s) as necessary. Perform TEST VER-5A.

TEST TC-119B - FUEL SYSTEM LEAN

Note. Perform TEST TC-119A before proceeding.

1. Check for defective wiring or connections at upstream oxygen sensor, downstream oxygen sensor and Powertrain Control Module (PCM).
2. Upstream oxygen sensor is mounted on exhaust manifold. Downstream oxygen sensor is mounted on exhaust pipe, behind catalytic converter. The PCM is located between driver's side front fender and power distribution center, near battery.
3. Perform following tests in the order listed. See TESTING SEQUENCE table. If a test passes, proceed to the next test until the problem is found.

TESTING SEQUENCE

TEST TC-126A - DOWNSTREAM O2 SENSOR SHORTED TO VOLTAGE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, read downstream oxygen sensor voltage. If downstream oxygen sensor voltage is more than 1.2 volts, go to next step. If downstream oxygen sensor voltage is 1.2 volts or less, go to step 3).
2. Disconnect connector at downstream oxygen sensor, mounted on exhaust pipe behind catalytic converter, and note downstream oxygen sensor voltage. If downstream oxygen sensor voltage is 1.2 volts or less, replace downstream oxygen sensor. Perform TEST VER-5A. If downstream oxygen sensor voltage is more than 1.2 volts, repair short to voltage in Tan/White wire between PCM and downstream oxygen sensor. Perform TEST VER-5A. The PCM is located between driver's side front fender and power distribution center, near battery.
3. Wiggle wiring harness and connector at downstream oxygen sensor, mounted on exhaust pipe behind catalytic converter, while monitoring downstream oxygen sensor voltage. If downstream oxygen sensor voltage increases to more than 1.2 volts at anytime while wiggling wiring harness, repair wiring harness or connector for intermittent short to voltage as necessary. Perform TEST VER-5A. If downstream oxygen sensor voltage does not increase to more than 1.2 volts at anytime while wiggling wiring harness, go to next step.
4. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) if downstream oxygen sensor voltage is more than 1.2 volts. Possible causes are: sensor output wire shorted to another circuit, dirt/moisture or grease in connector causing voltage tracking, defective connector terminals or wiring, defective downstream oxygen sensor or defective PCM. Go to next step.
5. Ensure ignition is off. Disconnect connectors at PCM and downstream oxygen senor. Downstream oxygen sensor is mounted on exhaust pipe behind catalytic converter. The PCM is located between driver's side front fender and power distribution center, near battery.
6. Inspect connectors for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-5A. If terminals are not pushed out, miswired or damaged, go to next step.
7. Check for defective wiring at downstream oxygen sensor and PCM. If defective wiring exists, repair as necessary. Perform TEST VER-5A. If no defective wiring or connections exists, test is complete. Perform TEST VER-5A.

TEST TC-128A - CLOSED LOOP TEMPERATURE NOT REACHED

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. This test will be invalid if thermostat is stuck open. Diagnostic Trouble Code (DTC) may be stored in Powertrain Control Module (PCM) if engine temperature does not become greater than 50°F (10°C) within 13 minutes after engine is started. Possible causes are: defective thermostat, defective engine coolant temperature sensor, defective connector terminals or wiring, extremely cold ambient temperatures or defective PCM.
2. Check that thermostat is operating correctly. If thermostat operates correctly, go to next step. If thermostat is not operating correctly, replace thermostat. Perform TEST VER-2A.
3. Start engine and warm engine until engine coolant temperature is greater than 80°F (27°C). Shut engine off. Disconnect connector at engine coolant temperature sensor. Engine coolant temperature sensor is located near thermostat housing and contains Black/Light Blue and Tan/Black wires in the connector.
4. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
5. Using ohmmeter, measure resistance between terminals on engine coolant temperature sensor. If resistance is less than 11,000 ohms, go to next step. If resistance is 11,000 ohms or more, replace engine coolant temperature sensor. Perform TEST VER-2A.
6. Turn ignition off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
7. Inspect connectors for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, replace PCM. Perform TEST VER-2A.

TEST TC-129A - DOWNSTREAM O2 SENSOR STAYS AT CENTER

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. If downstream oxygen sensor voltage is between .29 volt and .72 volt for 30 seconds, the Powertrain Control Module (PCM) pulls sensor voltage to 5 volts for 60 seconds and monitors the sensor voltage. If voltage stays at 5 volts, DTC will be stored in PCM. Possible causes are: sensor output wire open, open ground circuit, defective downstream oxygen sensor, defective connector terminals or wiring, dirt/moisture or grease inside connector, or defective PCM. Go to next step.
2. Turn ignition on with engine off. Wait 3 minutes and then use scan tool to monitor downstream oxygen sensor voltage for a few minutes. Once downstream oxygen sensor voltage stabilizes between .4 and .6 volt, use scan tool to actuate downstream oxygen sensor heater test while monitoring downstream oxygen sensor voltage for at least 2 minutes.
3. If downstream oxygen sensor voltage does not remain at .4-.6 volt, go to next step. If downstream oxygen sensor voltage remains at .4-.6 volt, go to step 6).
4. Stop downstream oxygen sensor heater test. Turn ignition off. Disconnect connector at downstream oxygen sensor mounted on exhaust pipe behind catalytic converter. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-5A. If terminals are not pushed out, miswired or damaged, go to next step.
5. Using ohmmeter, check resistance between ground and terminal No. 3 (Black/Light Blue wire) on wiring harness side of connector for downstream oxygen sensor. If resistance is 5 ohms or more, repair open circuit in Black/Light Blue wire between PCM and downstream oxygen sensor. Perform TEST VER-5A. The PCM is located between driver's side front fender and power distribution center, near battery. If resistance is less than 5 ohms, replace downstream oxygen sensor. Perform TEST VER-5A.
6. Stop downstream oxygen sensor heater test. Turn ignition off. Disconnect connector at downstream oxygen sensor mounted on exhaust pipe behind catalytic converter. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-5A. If terminals are not pushed out, miswired or damaged, go to next step.
7. Using ohmmeter, check resistance between ground and terminal No. 3 (Black/Light Blue wire) on wiring harness side of connector for downstream oxygen sensor. If resistance is 5 ohms or more, repair open circuit in Black/Light Blue wire between PCM and downstream oxygen sensor. Perform TEST VER-5A. The PCM is located between driver's side front fender and power distribution center, near battery. If resistance is less than 5 ohms, go to next step.
8. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
9. Using ohmmeter, check resistance between terminal No. 4 (Tan/White wire) on wiring harness side of connector for downstream oxygen sensor and PCM connector terminal No. 51 (Tan/White wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Tan/White wire between PCM and downstream oxygen sensor. Perform TEST VER-5A.
10. Reinstall connectors on PCM. Turn ignition on. Connect jumper wire between terminals No. 4 (Tan/White wire) and No. 3 (Black/Light Blue wire) on wiring harness side of connector for downstream oxygen sensor.
11. Using scan tool, read downstream oxygen sensor voltage. If downstream oxygen sensor voltage is .2 volt or more, replace PCM. Perform TEST VER-5A. If downstream oxygen sensor voltage is less than .2 volt, replace downstream oxygen sensor. Perform TEST VER-5A.

TEST TC-132A - TPS VOLTAGE DOES NOT AGREE WITH MAP

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, check for stored Diagnostic Trouble Codes (DTCs). If DTC exists for no vehicle speed sensor signal, perform TEST TC-35A. If no DTC exists for no vehicle speed sensor, go to next step.
2. If DTC exists for MAP sensor, perform appropriate test for the specified DTC. If no DTC exists for MAP sensor, go to next step.
3. Using scan tool, read MAP sensor voltage. If MAP sensor voltage is less than 3.5 volts, perform TEST NTC-6A. If MAP sensor voltage is 3.5 volts or more, go to next step.
4. Start engine. Using scan tool, read MAP sensor voltage. If MAP sensor voltage does not decrease from 3.5 volts or more to less than 2 volts, perform TEST NTC-6A. If MAP sensor voltage decreases from 3.5 volts or more to less than 2 volts, go to next step.
5. The Powertrain Control Module (PCM) performs a high-voltage test and low-voltage test on the throttle position sensor. High-voltage test is performed when engine speed is very low with high manifold vacuum, indicating throttle plate is nearly closed, in which case the throttle position sensor signal voltage output is low. Low-voltage test is performed when engine speed is high enough to obtain a vehicle speed of 25 MPH with low manifold vacuum, indicating throttle plate is open, in which case the throttle position sensor signal voltage output is high. If proper throttle position sensor voltage is not present when both conditions exist for 4 consecutive seconds, the DTC will be set in the PCM. Go to next step.
6. Check throttle linkage and throttle plate in throttle body for binding condition. Ensure throttle linkage is at idle position. Disconnect connector at throttle position sensor mounted on throttle body.
7. Inspect connector for proper wire installation in proper cavities on connector for throttle position sensor. See CONNECTOR IDENTIFICATION. If sensor ground (Black/Light Blue wire) and 5-volt supply (Violet/White wire) wires are reversed in the connector, this will cause the DTC to set.
8. Inspect connectors for pushed out or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
9. Using voltmeter, check voltage at Violet/White wire on connector for throttle position sensor. If voltage is 5 volts or more, go to next step. If voltage is less than 5 volts, repair open circuit in Violet/White wire between PCM and throttle position sensor. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
10. Reinstall connector on throttle position sensor. With ignition on and engine off, use scan tool to read throttle position sensor voltage. If throttle position sensor voltage is more than one volt, replace throttle position sensor. Perform TEST VER-2A. If throttle position sensor voltage is one volt or less, go to next step.
11. While monitoring throttle position sensor voltage, slowly open and close the throttle. Throttle must be moved very slowly while looking for an erratic change in the throttle position sensor voltage. If throttle position sensor voltage does not change smoothly, replace throttle position sensor. Perform TEST VER-2A. If throttle position sensor voltage changes smoothly, go to next step.
12. While monitoring throttle position sensor voltage, open throttle plate to wide open throttle. If throttle position sensor voltage is more than 3.5 volts, go to next step. If throttle position sensor voltage is 3.5 volts or less, replace throttle position sensor. Perform TEST VER-2A.
13. Wiggle wiring harness and connector going to throttle position sensor and PCM while monitoring throttle position sensor voltage. The PCM is located between driver's side front fender and power distribution center, near battery.
14. If throttle position sensor voltage changes while wiggling wiring harness, repair wiring harness or connector as necessary. Perform TEST VER-2A. If throttle position sensor voltage does not change while wiggling wiring harness, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.

TEST TC-138A - TARGET IDLE NOT REACHED

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. If engine exhibits a start and stall condition, perform TEST TC-138B. If engine does not exhibit a start and stall condition, go to next step.
2. With engine off, check throttle linkage and throttle plate in throttle body for binding condition. With throttle linkage at idle position, ensure throttle plate is fully closed. If binding condition exists or throttle plate does not fully close, repair as necessary. Perform TEST VER-2A. If no binding condition exists and throttle plate fully closes, go to next step.
3. Start engine and allow engine to idle for 60 seconds. Using scan tool, read target idle and engine RPM. If engine RPM is within 200 RPM of target idle, go to step 6). If engine RPM is not within 200 RPM of target idle, go to next step.
4. Check engine vacuum hoses and components for vacuum leaks. Ensure proper PCV valve is installed and PCV valve is operating correctly. If vacuum leaks exist, incorrect PCV valve is used, or PCV valve is not operating correctly, repair as necessary. Perform TEST VER-2A. If no vacuum leaks exist, correct PCV valve is used and PCV valve is operating correctly, go to next step.
5. With engine idling and at normal operating temperature, use scan tool to perform IAC wiggle test. Engine speed should increase and decrease in accordance with display on scan tool. If engine speed does not operate correctly, perform TEST TC-25A. If engine speed operates correctly, stop IAC wiggle test, shut engine off and go to next step.
6. Conditions required to set DTC are not present at this time. DTC may be stored in Powertrain Control Module (PCM) if engine speed is not with a specified amount of target idle for 20 seconds. Possible causes are: defective idle air control motor driver circuits, shorted idle air control motor, excessive carbon deposits, defective connector terminals or wiring, defective PCM. Go to next step.
7. Check for defective wiring or connections at idle air control motor and PCM. Idle air control motor is mounted on the throttle body and contains a 4-pin connector. The PCM is located between driver's side front fender and power distribution center, near battery. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A. If no defective wiring or connections exist, go to next step.
8. Remove idle air control motor from throttle body. Reinstall connector on idle air control motor. Turn ignition on. Using scan tool, actuate idle air control motor. Wiggle wiring harness from idle air control motor to PCM. If idle air control motor does not stop operating while wiggling wiring harness, go to next step. If idle air control motor stops operating while wiggling wiring harness, repair wiring as necessary. Perform TEST VER-2A.
9. Stop actuation of idle air control motor. Reinstall idle air control motor. See INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.

TEST TC-138B - TARGET IDLE NOT REACHED

Note. Perform TEST TC-138A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Check throttle body minimum airflow. See THROTTLE BODY MINIMUM AIRFLOW under IDLE SPEED & MIXTURE in appropriate ADJUSTMENTS - 3.3L article.
2. If throttle body minimum airflow idle RPM is within specification, throttle body is okay. Perform TEST VER-2A. If throttle body minimum airflow idle RPM is not within specification, go to next step.
3. Remove throttle body. With throttle fully open on throttle body, clean throttle body with parts cleaner. Using soft brush or pad, ensure throttle body bore and throttle plate are clean. Dry throttle body with compressed air.
4. Reinstall throttle body. Recheck throttle body minimum airflow. If throttle body minimum airflow idle RPM is within specification, throttle body is okay. Perform TEST VER-2A. If throttle body minimum airflow idle RPM is not within specification, replace throttle body. Perform TEST VER-2A.

TEST TC-146A - 5-VOLT SUPPLY OUTPUT TOO LOW

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Turn ignition on with engine off. Disconnect connector at throttle position sensor mounted on throttle body.
2. Using voltmeter, check voltage at Violet/White wire on connector for throttle position sensor. If voltage is less than 4.5 volts, go to step 5). If voltage is 4.5 volts or more, go to next step.
3. Reinstall connector on throttle position sensor. Disconnect connector from MAP sensor. See MAP SENSOR LOCATIONS table. MAP SENSOR LOCATIONS Application (1) Location 3.3L On End Of Intake Manifold, Near Throttle Body (1) MAP sensor contains a 3-pin connector.
4. Using voltmeter, check voltage at Violet/White wire on connector for MAP sensor. If voltage is less than 4.5 volts, replace throttle position sensor. Perform TEST VER-2A. If voltage is 4.5 volts or more, perform TEST TC-146B.
5. Disconnect connector from MAP sensor. See MAP SENSOR LOCATIONS table in this test.
6. Using voltmeter, check voltage at Violet/White wire on connector for throttle position sensor. If voltage is 4 volts or less, go to next step. If voltage is more than 4 volts, replace MAP sensor. Perform TEST VER-2A.
7. Disconnect connector from A/C pressure sensor. The A/C pressure sensor is located on A/C refrigerant line on firewall, near front of generator and contains a Gray 4-pin connector.
8. Using voltmeter, check voltage at Violet/White wire on connector for throttle position sensor. If voltage is 4 volts or less, go to next step. If voltage is more than 4 volts, replace A/C pressure sensor. Perform TEST VER-2A.
9. Turn ignition off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
10. Using ohmmeter, check resistance between ground and Violet/White wire on connector for throttle position sensor. If resistance is less than 5 ohms, repair short to ground in Violet/White wire between PCM and throttle position sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A.

TEST TC-146B - 5-VOLT SUPPLY OUTPUT TOO LOW

Note. Perform TEST TC-146A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using voltmeter to monitor voltage at Violet/White wire on connector for MAP sensor while wiggling wiring harness and connectors at throttle position sensor, MAP sensor and A/C pressure sensor. The A/C pressure sensor, located on A/C refrigerant line on firewall, near front of generator and contains a Gray 4-pin connector.
2. If voltage changes while wiggling wiring harness and connectors, repair wiring harness and connectors as necessary. Perform TEST VER-2A. If voltage does not change while wiggling wiring harness and connectors, go to next step.
3. Conditions required to set DTC are not present at this time. DTC may be stored in PCM if 5-volt supply to throttle position sensor, MAP sensor and A/C pressure sensor is less than 3.5 volts for 4 seconds. Possible causes are: shorted 5-volt supply circuit, shorted throttle position sensor, MAP sensor or A/C pressure sensor. If no defective wiring, connectors or sensors exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.

TEST TC-152A - BRAKE SWITCH STUCK PRESSED OR RELEASED

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connector at brake switch, located near top of brake pedal. Turn ignition on.
2. Using voltmeter, check voltage at terminal No. 1 (White/Pink wire) on connector for brake switch. If voltage is 9 volts or less, go to step 5). If voltage is more than 9 volts, go to next step.
3. Using ohmmeter, check resistance between ground and terminal No. 2 (Black wire) on connector for brake switch. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Black wire and ground. Perform TEST VER-2A.
4. Connect jumper wire between terminals No. 1 (White/Pink wire) and No. 2 (Black wire) on connector for brake switch while using scan tool to monitor brake switch status. If brake switch status changes from pressed to released, replace or adjust brake switch. Perform TEST VER-2A. If brake switch status does not change from pressed to released, replace Powertrain Control Module (PCM). Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.
5. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
6. Check connectors for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connectors as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
7. Using ohmmeter, check resistance between ground and terminal No. 1 (White/Pink wire) on connector for brake switch. If resistance is less than 5 ohms, repair short to ground in White/Pink wire between PCM and brake switch. Perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
8. Using ohmmeter, check resistance between terminal No. 1 (White/Pink wire) on connector for brake switch and PCM connector terminal No. 62 (White/Pink wire). If resistance is 5 ohms or more, repair open circuit in White/Pink wire between PCM and brake switch. Perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A.

TEST TC-153A - BATTERY TEMPERATURE SENSOR VOLTAGE TOO LOW OR TOO HIGH

1. Using scan tool, check for stored Diagnostic Trouble Codes (DTCs). If scan tool displays BATTERY TEMP. SENSOR VOLTAGE TOO LOW or BATTERY TEMP. SENSOR VOLTAGE TOO HIGH with a run count of zero, replace Powertrain Control Module (PCM). Perform TEST VER-2A. If scan tool does not display BATTERY TEMP. SENSOR VOLTAGE TOO LOW or BATTERY TEMP. SENSOR VOLTAGE TOO HIGH with a run count of zero, go to next step.
2. Conditions required to set DTC are not present at this time. Battery temperature sensor is built internally in the PCM. Battery temperature sensor voltage signal is used by PCM to determine what charging system goal should be.
3. The PCM uses charging system goal to determine charging system output level. Battery temperature sensor is also used to disable EGR operation and OBD-II monitors at cold temperatures. DTC will be set when PCM senses voltage from battery temperature sensor is less than .5 volt or more than 4.9 volts for 3 seconds. Possible cause for DTC to set is PCM failure. Also see INACTIVE TROUBLE CODE CONDITION.

TEST TC-155A - UPSTREAM O2 SENSOR VOLTAGE SHORTED TO GROUND

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. This Diagnostic Trouble Code (DTC) may be stored in Powertrain Control Module (PCM) if upstream oxygen sensor signal voltage is less than .156 volt prior to upstream oxygen sensor heater test, and upstream oxygen sensor signal voltage is less than .156 volt after ignition is turned on in subsequent start. Possible causes are: dirt/moisture or grease on connector causing voltage tracking, sensor signal wire shorted to another circuit, defective upstream oxygen sensor, defective connector terminals or wiring, defective PCM. Upstream oxygen sensor is mounted on the exhaust manifold. Go to next step.
2. Turn ignition on with engine off. Using scan tool, monitor upstream oxygen sensor voltage for a few minutes. Wait 3 minutes or until upstream oxygen sensor voltage stabilizes, and then using scan tool, monitor upstream oxygen sensor voltage.
3. If upstream oxygen sensor voltage is less than .16 volt, go to next step. If upstream oxygen sensor voltage is .16 volt or more, conditions required to set DTC are not present at this time. Perform TEST VER-5A.
4. Turn ignition off. Disconnect connector at upstream oxygen sensor mounted on exhaust manifold. Turn ignition on. Using scan tool, monitor upstream oxygen sensor voltage.
5. If upstream oxygen sensor voltage is less than .16 volt, go to next step. If upstream oxygen sensor voltage is .16 volt or more, replace upstream oxygen sensor. Perform TEST VER-5A.
6. Turn ignition off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
7. Using ohmmeter, check resistance between terminals No. 3 (Black/Light Blue wire) and No. 4 (Black/Dark Green wire) at wiring harness side of connector for upstream oxygen sensor. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short between Black/Dark Green wire and Black/Light Blue wire from PCM to upstream oxygen sensor. Perform TEST VER-5A.
8. Using ohmmeter, check resistance between ground and terminal No. 4 (Black/Dark Green wire) at connector for upstream oxygen sensor. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-5A. If resistance is less than 5 ohms, repair short to ground on Black/Dark Green wire between PCM and upstream oxygen sensor. Perform TEST VER-5A.

TEST TC-156A - DOWNSTREAM O2 SENSOR VOLTAGE SHORTED TO GROUND

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. This Diagnostic Trouble Code (DTC) may be stored in Powertrain Control Module (PCM) if downstream oxygen sensor signal voltage is less than .156 volt prior to downstream oxygen sensor heater test, and downstream oxygen sensor signal voltage is less than .156 volt after ignition is turned on in subsequent start. Possible causes are: dirt/moisture or grease on connector causing voltage tracking, sensor signal wire shorted to another circuit, defective downstream oxygen sensor, defective connector terminals or wiring, defective PCM. Downstream oxygen sensor is mounted on exhaust pipe, behind catalytic converter. Go to next step.
2. Turn ignition on with engine off. Using scan tool, monitor downstream oxygen sensor voltage for a few minutes. Wait 3 minutes or until downstream oxygen sensor voltage stabilizes, and then using scan tool, monitor downstream oxygen sensor voltage.
3. If downstream oxygen sensor voltage is less than .16 volt, go to next step. If downstream oxygen sensor voltage is .16 volt or more, conditions required to set DTC are not present at this time. Perform TEST VER-5A.
4. Turn ignition off. Disconnect connector at downstream oxygen sensor mounted on exhaust pipe, behind catalytic converter. Turn ignition on. Using scan tool, monitor downstream oxygen sensor voltage.
5. If downstream oxygen sensor voltage is less than .16 volt, go to next step. If downstream oxygen sensor voltage is .16 volt or more, replace downstream oxygen sensor. Perform TEST VER-5A.
6. Turn ignition off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
7. Using ohmmeter, check resistance between terminals No. 3 (Black/Light Blue wire) and No. 4 (Tan/White wire) at connector for downstream oxygen sensor. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short between Tan/White wire and Black/Light Blue wire from PCM to downstream oxygen sensor. Perform TEST VER-5A.
8. Using ohmmeter, check resistance between ground and terminal No. 4 (Tan/White wire) at connector for downstream oxygen sensor. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-5A. If resistance is less than 5 ohms, repair short to ground on Tan/White wire between PCM and downstream oxygen sensor. Perform TEST VER-5A.

TEST TC-157A - INTERMITTENT LOSS OF CMP OR CKP

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. The Camshaft Position (CMP) sensor or Crankshaft Position (CKP) sensor signal loss may be detected by a RPM change, Diagnostic Trouble Code (DTC) or using oscilloscope. If you want to diagnose loss of CMP or CKP signal by using oscilloscope, go to next step. If you do not want to diagnose loss of CMP or CKP signal by using oscilloscope, perform TEST TC-157B.
2. Ensure engine is off. Using voltage measurement lead on oscilloscope, backprobe Tan/Yellow wire on camshaft position sensor connector.Camshaft position sensor is located on top of timing chain cover, just below thermostat housing.
3. Start engine. Observe CMP sensor voltage pattern on oscilloscope. If CMP sensor voltage signals are missing from the oscilloscope pattern, go to next step. If no CMP sensor voltage signals are missing from the oscilloscope pattern, go to step 7).
4. Turn ignition off. Disconnect connector at camshaft position sensor. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
5. Disconnect connectors at Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
6. Inspect connectors for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connectors as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, perform TEST TC-157D.
7. Using voltage measurement lead on oscilloscope, backprobe terminal No. 33 (Tan/Yellow wire) on Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
8. Wiggle wiring and connectors from PCM to camshaft position sensor while observing CMP sensor voltage signals on oscilloscope. If CMP sensor voltage signals are missing from oscilloscope pattern while wiggling wiring, repair wiring and connectors as necessary. Perform TEST VER-2A. If no CMP sensor voltage signals are missing from oscilloscope pattern while wiggling wiring, go to next step.
9. Turn ignition off. Using voltage measurement lead on oscilloscope, backprobe terminal No. 3 (Gray/Black wire) on connector at crankshaft position sensor. Crankshaft position sensor is located on top of transaxle housing, above flywheel, near corner of rear exhaust manifold.
10. Start engine. Observe CKP sensor voltage pattern on oscilloscope. If CKP sensor voltage signals are missing from the oscilloscope pattern, go to next step. If no CKP sensor voltage signals are missing from the oscilloscope pattern, go to step 14).
11. Turn ignition off. Disconnect connector at crankshaft position sensor. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
12. Disconnect connectors at PCM. The PCM is located between driv-er's side front fender and power distribution center, near battery.
13. Inspect connectors for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connectors as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, perform TEST TC-157E.
14. Using voltage measurement lead on oscilloscope, backprobe terminal No. 32 (Gray/Black wire) on PCM. Wiggle wiring and connectors from PCM to crankshaft position sensor while observing CKP sensor voltage signals on oscilloscope.
15. If CKP sensor voltage signals are missing from oscilloscope pattern while wiggling wiring, repair wiring and connectors as necessary. Perform TEST VER-2A. If no CKP sensor voltage signals are missing from oscilloscope pattern while wiggling wiring, go to next step.
16. Conditions required to set DTC are not present at this time. After engine is started, PCM maintains an expected camshaft port level value. At every 69 degree crank edge, this value is toggled to reflect the expected change in the camshaft level. At every crank falling edge, this value is compared to the true camshaft port level. If difference exists between expected camshaft port level value and true camshaft port level, a DTC may be stored in PCM.
17. Possible causes are: open or shorted 8-volt supply circuit, open sensor ground, open or shorted signal circuit, excessive crankshaft or camshaft position sensor clearance, defective crankshaft or camshaft position sensor or drive components, defective PCM. Also see INACTIVE TROUBLE CODE CONDITION.

TEST TC-157B - INTERMITTENT LOSS OF CMP OR CKP

Note. Perform TEST TC-157A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off. Disconnect connectors at Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
2. Inspect connectors for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connectors as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
3. Disconnect connector at camshaft position sensor. Camshaft position sensor is located on top of timing chain cover, just below thermostat housing.
4. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
5. Disconnect connector at crankshaft position sensor. Crankshaft position sensor is located on top of transaxle housing, above flywheel, near corner of rear exhaust manifold.
6. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
7. Inspect camshaft thrust plate for damage. Camshaft thrust plate is located at front of camshaft, behind camshaft sprocket and secures camshaft in cylinder block. Camshaft thrust plate controls camshaft end play. If camshaft thrust plate is okay, go to next step. If camshaft thrust plate is damaged, replace camshaft thrust plate. Perform VER-2A.
8. Reinstall connectors on PCM. Reinstall connectors on camshaft position sensor and crankshaft position sensor.
9. Start engine and allow engine to idle. Wait at least 30 seconds and then use scan tool to check for stored Diagnostic Trouble Codes (DTCs). If scan tool displays INTERMITTENT LOSS OF CMP, OR CKP, go to next step. If scan tool does not display INTERMITTENT LOSS OF CMP OR CKP, perform TEST TC-157C.
10. If camshaft position sensor was just replaced, perform TEST TC-157E. If camshaft position sensor was not just replaced, perform TEST TC-157D instead of verification test and then clear DTCs from PCM. Return to step 9) in this test and recheck for DTCs.

TEST TC-157C - INTERMITTENT LOSS OF CMP OR CKP

Note. Perform TEST TC-157A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. If camshaft position sensor was just replaced, test is complete. Perform TEST VER-2A. If camshaft position sensor was not just replaced, go to next step.
2. With engine idling, use scan tool to read engine RPM while wiggling wiring and connectors from PCM to camshaft and crankshaft position sensors. If engine RPM changes while wiggling wiring and connectors, repair wiring and connectors as necessary. Perform TEST VER-2A. If engine RPM does not change while wiggling wiring and connectors, go to next step.
3. Using scan tool, check for stored DTCs. If scan tool displays INTERMITTENT LOSS OF CMP OR CKP, DTC was set by wiggling wiring or connectors from PCM to camshaft and crankshaft position sensors. Repair wiring and connectors as necessary. Perform TEST VER-2A. If scan tool does not display INTERMITTENT LOSS OF CMP, go to next step.
4. It may be necessary to repeat steps 2) and 3) again while wiggling another section of the wiring harness. If DTC is not set, conditions required to set DTC at this time are not present.
5. After engine is started, PCM maintains an expected camshaft port level value. At every 69 degree crank edge this value is toggled to reflect the expected change in the camshaft level. At every crank falling edge, this value is compared to the true camshaft port level. If difference exists between expected camshaft port level value and true camshaft port level, a DTC may be stored in PCM.
6. Possible causes are: open or shorted 8-volt supply circuit, open sensor ground, open or shorted signal circuit, excessive crankshaft or camshaft position sensor clearance, defective crankshaft or camshaft position sensor or drive components, defective PCM. Also see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2A.

TEST TC-157D - INTERMITTENT LOSS OF CMP OR CKP

Note. Perform TEST TC-157A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure ignition is off.
2. Replace target magnet and locating dowels if damaged. Perform TEST VER-2A. If target magnet and locating dowels are okay, inspect camshaft thrust surfaces for damage. If camshaft thrust surfaces are damaged, replace components as necessary. Perform TEST VER-2A. If camshaft thrust surfaces are okay, replace camshaft position sensor. Perform TEST VER-2A.
3. Remove camshaft position sensor. Camshaft position sensor is located on top of timing chain cover, just below thermostat housing. Inspect camshaft sprocket for damage.
4. Replace camshaft sprocket if damaged. Perform TEST VER-2A. If camshaft sprocket is okay, inspect camshaft thrust plate for damage. Camshaft thrust plate is located behind camshaft sprocket, at front of camshaft. Camshaft thrust plate secures camshaft in cylinder block.
5. If camshaft thrust plate is damaged, replace camshaft thrust plate. Perform TEST VER-2A. If camshaft thrust plate is okay, replace camshaft position sensor. Perform TEST VER-2A.

TEST TC-157E - INTERMITTENT LOSS OF CMP OR CKP

Note. Perform TEST TC-157A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Remove crankshaft position sensor. Crankshaft position sensor is located on top of transaxle housing, above flywheel, near corner of rear exhaust manifold.
2. Inspect slotted areas on flywheel, near starter ring for damage. There are 3 sets of slotted areas which contain 4 slots in each set.
3. If slotted areas are damaged, repair or replace flywheel as necessary. Perform TEST VER-2A. If slotted areas are okay, inspect camshaft thrust plate for damage. Camshaft thrust plate is located at front of camshaft, behind camshaft sprocket and secures camshaft in cylinder block. Camshaft thrust plate controls camshaft end play.
4. If camshaft thrust plate is okay, replace crankshaft position sensor. Perform TEST VER-2A. If camshaft thrust plate is damaged, replace camshaft thrust plate. Perform VER-2A.

TEST TC-160A - EVAP SYSTEM SMALL LEAK

Note. This diagnostic trouble code may be set by a loose fuel tank cap.

Note. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Scheme 145

1. Diagnostic trouble code may be set by a loose fuel tank cap. Ensure fuel tank contains at least 3 gallons of fuel.
2. Install vacuum pump on service "T" fitting in engine vacuum hose to leak detection pump. Leak detection pump is located below driver's side of steering gear, above engine cradle. (Scheme 145) (Scheme 145): Locating Leak Detection Pump
3. Using vacuum pump, apply 18 in. Hg of vacuum on engine vacuum hose to leak detection pump. Note if vacuum pump holds vacuum.
4. If vacuum can be maintained, go to next step. If vacuum cannot be maintained, check engine vacuum hose to leak detection pump for leaks. If engine vacuum hose to leak detection pump is okay, replace leak detection pump. Repeat this entire test to verify system operation.
5. Turn ignition on. Using scan tool, actuate leak detection pump solenoid while monitoring vacuum reading on vacuum pump. If vacuum decreases and then holds steady when leak detection pump solenoid is actuated, go to next step. If vacuum does not decrease and then hold steady when leak detection pump solenoid is actuated, replace leak detection pump. Repeat this entire test to verify system operation.
6. Evaporative System Testing Kit (6872A) is used to perform evaporative system pressure test. Perform pressure pump self-test by using instructions on cover of evaporative system testing kit.
7. Connect evaporative system pressure pump supply hose to EVAP system test port located near EVAP purge solenoid and passenger's side strut tower. see scheme 66 see scheme 66: Locating EVAP Purge Solenoid & Typical EVAP System Test Port
8. Set pressure hold to OPEN position and set vent to CLOSED position. Turn pump timer on. Perform IM240 simulation as described on cover of evaporative system testing kit while monitoring the pressure.
9. If pressure decreases more than 8 inches in 2 minutes, go to step 17). If pressure does not decrease more than 8 inches in 2 minutes, go to next step.
10. Conditions required to set DTC are not present at this time. Leak detection assembly detects a leak in EVAP system and seals EVAP system so leak detection test may be performed. Leak detection assembly consists of leak detection pump solenoid, leak detection pump incorporating a switch which monitors the pump movement, 2 check valves, spring diaphragm and a EVAP canister vent valve.
11. Immediately after a cold start with ambient temperature of 40-90°F (4.4-32°C) and engine coolant temperature is within 10°F (-12°C) of ambient temperature, leak detection pump solenoid is energized. When solenoid is energized, engine vacuum enters leak detection pump and draws the spring diaphragm upward, allowing atmospheric pressure to enter cavity on leak detection pump.
12. When leak detection pump solenoid is de-energized, this vents engine vacuum, allowing spring diaphragm to move downward, forcing the air out of cavity on leak detection pump and into the vent system. When leak detection pump solenoid is energized and de-energized, the cycle is repeated, resulting in a pumping effect.
13. After passing leak detection phase of the test, system pressure is maintained until purge system is activated, in effect creating a leak. If cycle rate increases due to the flow of the purge system, the test is passed and diagnostic test is complete. If cycle rate does not increase, an obstruction exists in the system.
14. Possible causes for DTC to be set are: defective leak detection pump or a leak larger than.040" and smaller than.080" in the evaporative system. Go to next step.
15. Inspect hoses for EVAP system at engine, EVAP purge solenoid, EVAP canister and leak detection pump. The EVAP purge solenoid is located near passenger's side strut tower. see scheme 66 EVAP canister is located on frame rail, directly below driver's seat. Inspect wiring and connectors at EVAP purge solenoid, leak detection pump and Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
16. If hoses, wiring or connectors are damaged, repair as necessary. Perform TEST VER-5A. If no defective hoses, wiring or connectors exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-5A.
17. Set pressure hold to OPEN position and set vent to CLOSED position. Turn pump timer on. Move evaporative system testing kit away from vehicle to prevent operating noise from interfering with test procedures.
18. Using Ultrasonic Leak Detector (300), check for leaks at fuel tank cap, fuel tank pressure release/rollover valve, EVAP purge solenoid, EVAP canister and leak detection pump. Fuel tank pressure release/rollover valve is located on fuel tank filler tube, just below fuel tank cap. The EVAP purge solenoid is located near passenger's side strut tower. see scheme 66 EVAP canister is located on frame rail, directly below driver's seat.
19. If leak exists at any component, repair or replace component as necessary. Perform TEST VER-5A. If no leaks exist, replace leak detection pump. Perform TEST VER-5A.

TEST TC-161A - EVAP SYSTEM GROSS LEAK

Note. This diagnostic trouble code may be set by a loose fuel tank cap.

Note. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Diagnostic trouble code may be set by a loose fuel tank cap. Ensure fuel tank contains at least 3 gallons of fuel.
2. Install vacuum pump on service "T" fitting in engine vacuum hose to leak detection pump. Leak detection pump is located below driver's side of steering gear, above engine cradle. (Scheme 145)
3. Using vacuum pump, apply 18 in. Hg of vacuum on engine vacuum hose to leak detection pump. Note if vacuum pump holds vacuum.
4. If vacuum can be maintained, go to next step. If vacuum cannot be maintained, check engine vacuum hose to leak detection pump for leaks. If engine vacuum hose to leak detection pump is okay, replace leak detection pump. Repeat this entire test to verify system operation.
5. Turn ignition on. Using scan tool, actuate leak detection pump solenoid while monitoring vacuum reading on vacuum pump. If vacuum decreases and then hold steady when leak detection pump solenoid is actuated, go to next step. If vacuum does not decrease and then hold steady when leak detection pump solenoid is actuated, replace leak detection pump. Repeat this entire test to verify system operation.
6. Evaporative System Testing Kit (6872A) is used to perform evaporative system pressure test. Perform pressure pump self-test by using instructions on cover of evaporative system testing kit.
7. Connect evaporative system pressure pump supply hose to EVAP system test port located near EVAP purge solenoid and passenger's side strut tower. see scheme 66
8. Set pressure hold to OPEN position and set vent to CLOSED position. Turn pump timer on. Perform IM240 simulation as described on cover of evaporative system testing kit while monitoring the pressure.
9. If pressure decreases more than 8 inches in 2 minutes, go to step 17). If vacuum does not decrease more than 8 inches in 2 minutes, go to next step.
10. Conditions required to set DTC are not present at this time. Leak detection assembly detects a leak in EVAP system and seals EVAP system so leak detection test may be performed. Leak detection assembly consists of leak detection pump solenoid, leak detection pump incorporating a switch which monitors the pump movement, 2 check valves, spring diaphragm and a EVAP canister vent valve.
11. Immediately after a cold start with ambient temperature of 40-90°F (4.4-32°C) and engine coolant temperature is within 10°F (-12°C) of ambient temperature, leak detection pump solenoid is energized. When solenoid is energized, engine vacuum enters leak detection pump and draws the spring diaphragm upward, allowing atmospheric pressure to enter cavity on leak detection pump.
12. When leak detection pump solenoid is de-energized, this vents engine vacuum, allowing spring diaphragm to move downward, forcing the air out of cavity on leak detection pump and into the vent system. When leak detection pump solenoid is energized and de-energized, the cycle is repeated, resulting in a pumping effect.
13. After passing leak detection phase of the test, system pressure is maintained until purge system is activated, in effect creating a leak. If cycle rate increases due to the flow of the purge system, the test is passed and diagnostic test is complete. If cycle rate does not increase, an obstruction exists in the system.
14. Possible causes for DTC to be set are: defective leak detection pump or a leak larger than.080" in the evaporative system. Go to next step.
15. Inspect hoses for EVAP system at engine, EVAP purge solenoid, EVAP canister and leak detection pump. The EVAP purge solenoid is located near passenger's side strut tower. see scheme 66 EVAP canister is located on frame rail, directly below the driver's seat. Inspect wiring and connectors at EVAP purge solenoid, leak detection pump and Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
16. If hoses, wiring or connectors are damaged, repair as necessary. Perform TEST VER-5A. If no defective hoses, wiring or connectors exist, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-5A.
17. Set pressure hold to OPEN position and set vent to CLOSED position. Turn pump timer on. Move evaporative system testing kit away from vehicle to prevent operating noise from interfering with test procedures. NOTE: When using leak detector, if pump noise still interferes with leak detector, set pressure hold to CLOSED position and turn pump timer off. Ensure EVAP system remains under pressure when checking for leaks. If EVAP system cannot maintain pressure, set pressure hold to OPEN position and turn pump timer back on.
18. Using Ultrasonic Leak Detector (300), check for leaks at fuel tank cap, fuel tank pressure release/rollover valve, EVAP purge solenoid, EVAP canister and leak detection pump. Fuel tank pressure release/rollover valve is located on fuel tank filler tube, just below fuel tank cap. The EVAP purge solenoid is located near passenger's side strut tower. see scheme 66 EVAP canister is located on frame rail, directly below driver's seat.
19. If leak exists at any component, repair or replace component as necessary. Perform TEST VER-5A. If no leaks exist, replace leak detection pump. Perform TEST VER-5A.

TEST TC-183A - LEAK DETECTION PUMP SOLENOID CIRCUIT

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Turn ignition on. Using scan tool, actuate leak detection pump solenoid and listen for clicking sound at leak detection pump. Leak detection pump is located below driver's side of steering gear, above engine cradle. see scheme 87 If clicking sound is heard at leak detection pump, go to next step. If clicking sound is not heard at leak detection pump, go to step 11). see scheme 67: Locating Leak Detection Pump
2. Using scan tool, stop actuation of leak detection pump. Conditions required to set DTC are not present at this time. Leak detection assembly detects a leak in EVAP system and seals EVAP system so leak detection test can be performed. Leak detection assembly consists of leak detection pump solenoid, leak detection pump incorporating leak detection pump pressure switch which monitors the pump movement, 2 check valves, spring diaphragm and a EVAP canister vent valve.
3. Immediately after a cold start with ambient temperature of 40-90°F (4.4-32°C) and engine coolant temperature is within 10°F (-12°C) of ambient temperature, leak detection pump solenoid is energized. When solenoid is energized, engine vacuum enters leak detection pump and draws the spring diaphragm upward, allowing atmospheric pressure to enter cavity on leak detection pump.
4. When leak detection pump solenoid is de-energized, this vents engine vacuum, allowing spring diaphragm to move downward, forcing the air out of cavity on leak detection pump and into the vent system. When leak detection pump solenoid is energized and de-energized, the cycle is repeated, resulting in a pumping effect.
5. After passing leak detection phase of the test, system pressure is maintained until the purge system is activated, in effect creating a leak. If cycle rate increases due to the flow of the purge system, the test is passed and diagnostic test is complete. If cycle rate does not increase, an obstruction exists in the system.
6. The DTC may be stored in PCM if the state of leak detection pump solenoid does change. Possible causes are: open or shorted wiring for leak detection pump solenoid control circuit, defective leak detection pump solenoid, open fused ignition switch output. Go to next step. NOTE: Fused ignition switch output circuit (White/Black wire) from leak detection pump solenoid goes to power distribution center, and then to Positive Temperature Coefficient (PTC) No. 1 in junction block, located behind driver's side of instrument panel, to the left of steering column. The PTC receives voltage when ignition is on. The PTC is a specified amperage solid-state circuit breaker located in junction box. The PTC may reset when all current is removed from PTC for approximately 20 seconds.
7. Inspect wiring and connectors between leak detection pump and Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
8. If wiring or connectors are defective, repair as necessary. Perform TEST VER-5A. If no defective wiring or connectors exist, go to next step.
9. Using scan tool, actuate leak detection pump solenoid. While monitoring Leak Detection Pump (LDP) pressure switch state, wiggle wiring from leak detection pump to PCM.
10. If scan tool indicates LDP pressure switch changes from UP to DOWN while wiggling wiring, repair wiring as necessary. Perform TEST VER-5A. If scan tool does not indicate LDP pressure switch changes from UP to DOWN while wiggling wiring, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-5A.
11. Turn ignition off. Disconnect connector at leak detection pump. Turn ignition on. Using voltmeter, check voltage at terminal No. 3 (White/Black wire) on connector for leak detection pump.
12. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in fused ignition switch output circuit (White/Black wire) to leak detection pump. White/Black wire goes from leak detection pump to power distribution center, and then to Positive Temperature Coefficient (PTC) No. 1 in junction block, located behind driver's side of instrument panel, to the left of steering column. The PTC receives voltage when ignition is on. Once open circuit is repaired, perform TEST VER-5A. NOTE: The PTC is a specified amperage solid-state circuit breaker located in junction box. The PTC may reset when all current is removed from PTC for approximately 20 seconds.
13. Turn ignition off. Disconnect connectors at Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
14. Using ohmmeter, check resistance between terminal No. 2 (White/Dark Green wire) on connector for leak detection pump and PCM connector terminal No. 77 (White/Dark Green wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in White/Dark Green wire between PCM and leak detection pump. Perform TEST VER-5A.
15. Using ohmmeter, check resistance between ground and PCM connector terminal No. 77 (White/Dark Green wire). If resistance is less than 5 ohms, repair short to ground in White/Dark Green wire between PCM and leak detection pump. Perform TEST VER-5A. If resistance is 5 ohms or more, go to next step.
16. Reinstall connector on leak detection pump. Turn ignition on. Using voltmeter, check voltage at PCM connector terminal No. 77 (White/Dark Green wire). If voltage is more than 10 volts, replace PCM. Perform TEST VER-5A. If voltage is 10 volts or less, replace leak detection pump. Perform TEST VER-5A.

TEST TC-184A - LEAK DETECTION PUMP PRESSURE SWITCH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Start engine and allow engine to idle. Using scan tool, observe Leak Detection Pump (LDP) pressure switch state with scan tool in LDP system test. Press "1" on keypad with scan tool in LDP system test and monitor LDP pressure switch state. If LDP pressure switch state toggles, go to next step. If LDP pressure switch does not toggle, go to step 11).
2. Conditions required to set DTC are not present at this time. Leak detection assembly detects a leak in EVAP system and seals EVAP system so leak detection test can be performed. Leak detection assembly consists of leak detection pump solenoid, leak detection pump incorporating leak detection pump pressure switch which monitors the pump movement, 2 check valves, spring diaphragm and a EVAP canister vent valve.
3. Immediately after a cold start with ambient temperature of 40-90°F (4.4-32°C) and engine coolant temperature is within 10°F (-12°C) of ambient temperature, leak detection pump solenoid is energized. When solenoid is energized engine vacuum enters leak detection pump and draws the spring diaphragm upward, allowing atmospheric pressure to enter cavity on leak detection pump.
4. When leak detection pump solenoid is de-energized, this vents engine vacuum, allowing spring diaphragm to move downward, forcing the air out of cavity on leak detection pump and into the vent system. When leak detection pump solenoid is energized and de-energized, the cycle is repeated, resulting in a pumping effect.
5. After passing leak detection phase of the test, system pressure is maintained until the purge system is activated, in effect creating a leak. If cycle rate increases due to the flow of the purge system, the test is passed and diagnostic test is complete. If cycle rate does not increase, an obstruction exists in the system.
6. The DTC may be stored in PCM if leak detection pump pressure switch fails to change positions when leak detection pump solenoid is energized. Possible causes are: open or shorted leak detection pump pressure switch sense circuit, defective leak detection pump pressure switch, open fused ignition switch output. Go to next step. NOTE: Fused ignition switch output circuit (White/Black wire) from leak detection pump solenoid goes to power distribution center, and then to Positive Temperature Coefficient (PTC) No. 1 in junction block, located behind driver's side of instrument panel, to the left of steering column. The PTC receives voltage when ignition is on. The PTC is a specified amperage solid-state circuit breaker located in junction box. The PTC may reset when all current is removed from PTC for approximately 20 seconds.
7. Inspect wiring and connectors between leak detection pump and Powertrain Control Module (PCM). Leak detection pump is located below driver's side of steering gear, above engine cradle. see scheme 68 The PCM is located between driver's side front fender and power distribution center, near battery. see scheme 68: Locating Leak Detection Pump
8. If wiring or connectors are damaged, repair as necessary. Perform TEST VER-5A. If no defective wiring or connectors exist, go to next step.
9. Using scan tool, actuate leak detection pump solenoid. While monitoring Leak Detection Pump (LDP) pressure switch state, wiggle wiring from leak detection pump to PCM.
10. If scan tool indicates LDP pressure switch toggles while wiggling wiring, repair wiring as necessary. Perform TEST VER-5A. If scan tool does not indicate LDP pressure switch toggles while wiggling wiring, see INACTIVE TROUBLE CODE CONDITION in. Perform TEST VER-5A.
11. Ensure ignition is off. Disconnect engine vacuum hose at leak detection pump, located below driver's side of steering gear, above engine cradle. see scheme 68
12. Install vacuum gauge on engine vacuum hose at leak detection pump and at engine vacuum source. Start engine and note vacuum readings. Vacuum at engine vacuum hose at leak detection pump should be within one in. Hg of the engine vacuum.
13. If vacuum at engine vacuum hose at leak detection pump is within one in. Hg of the engine vacuum, remove vacuum gauges, reinstall engine vacuum hose and go to next step. If vacuum at engine vacuum hose at leak detection pump is not within one in. Hg of the engine vacuum, remove vacuum gauges and repair leak or obstruction on engine vacuum hose. Perform TEST VER-5A.
14. Ensure ignition is off. Disconnect connector at leak detection pump. Turn ignition on. Using voltmeter, check voltage at terminal No. 3 (White/Black wire) on connector for leak detection pump.
15. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in fused ignition switch output circuit (White/Black wire) to leak detection pump. White/Black wire goes from leak detection pump to power distribution center, and then to Positive Temperature Coefficient (PTC) No. 1 in junction block, located behind driver's side of instrument panel, to the left of steering column. The PTC receives voltage when ignition is on. Once open circuit is repaired, perform TEST VER-5A. NOTE: The PTC is a specified amperage solid-state circuit breaker located in junction box. The PTC may reset when all current is removed from PTC for approximately 20 seconds.
16. Ensure ignition is off. Disconnect connectors at Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
17. Using ohmmeter, check resistance between terminal No. 1 (Yellow/Black wire) on connector for leak detection pump and PCM connector terminal No. 72 (Yellow/Black wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Yellow/Black wire between PCM and leak detection pump. Perform TEST VER-5A.
18. Using ohmmeter, check resistance between ground and PCM connector terminal No. 72 (Yellow/Black wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on Yellow/Black wire between PCM and leak detection pump. Perform TEST VER-5A.
19. Reinstall connector on leak detection pump. Turn ignition on. Check voltage at PCM connector terminal No. 72 (Yellow/Black wire) while using vacuum pump to apply vacuum on leak detection pump. If voltage changes when applying vacuum on leak detection pump, replace PCM. Perform TEST VER-5A. If voltage does not change when applying vacuum on leak detection pump, replace leak detection pump. Perform TEST VER-5A.

TEST TC-186A - MIS-FIRE ADAPTIVE NUMERATOR AT LIMIT

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Disconnect connector at crankshaft position sensor. Crankshaft position sensor is located on top of transaxle housing, above flywheel, near corner of rear exhaust manifold.
2. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, go to next step.
3. Check crankshaft position sensor for proper installation. If crankshaft position sensor is improperly installed, correct as necessary. Perform TEST VER-2A. If crankshaft position sensor is properly installed, go to next step.
4. Remove crankshaft position sensor.
5. Inspect slotted areas on flywheel, near starter ring for damage or debris. There are 3 sets of slotted areas which contain 4 slots in each set. If slotted areas are okay, replace crankshaft position sensor. Perform TEST VER-2A. If slotted areas are damaged, repair or replace flywheel as necessary. Perform TEST VER-2A.

TEST TC-187A - EVAP MONITOR PINCHED HOSE

Note. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure fuel tank contains at least 3 gallons of fuel. Evaporative System Testing Kit (6872A) is used to perform evaporative system pressure test. Perform pressure pump self-test by using instructions on cover of evaporative system testing kit.
2. Connect evaporative system pressure pump supply hose to EVAP system test port located near EVAP purge solenoid and passenger's side strut tower. see scheme 69 see scheme 69: Locating EVAP Purge Solenoid & Typical EVAP System Test Port
3. Start engine. Go to LDP system test on scan tool and follow displays on scan tool. Set pressure hold to OPEN position and set vent to CLOSED position on evaporative system testing kit. Turn pump timer on. Allow pressure to increase to at least 14 inches.
4. Remove fuel tank cap while monitoring the pressure. If pressure decreases when fuel tank cap was removed, go to next step. If pressure does not decrease when fuel tank cap was removed, go to step 8).
5. Reinstall fuel tank cap. Allow pressure to increase to at least 14 inches again.
6. Disconnect pressure hose from leak detection pump at EVAP canister while monitoring the pressure. This is the hose that fits between leak detection pump and the EVAP canister. see scheme 70and see scheme 71. The EVAP canister is located on frame rail, directly below driv-er's seat. Leak detection pump is located below driver's side of steering gear, above engine cradle.
7. If pressure decreases when pressure hose was disconnected, replace leak detection pump. Perform TEST VER-5A. If pressure does not decrease when pressure hose was disconnected, replace EVAP canister. Perform TEST VER-5A. see scheme 70: Locating EVAP Canister & Identifying Hoses see scheme 71: Locating Leak Detection Pump
8. Reinstall fuel tank cap. Ensure pressure is at least 14 inches of water vacuum. Disconnect hose for fuel tank vent port at EVAP canister while monitoring the pressure. see scheme 70 This is the hose from EVAP canister to the fuel tank pressure release/rollover valve. Fuel tank pressure release/rollover valve is located on fuel tank filler tube, just below fuel tank cap. The EVAP canister is located on frame rail, directly below driver's seat.
9. If pressure does not decrease when hose for fuel tank vent port was disconnected, go to next step. If pressure decreases when hose for fuel tank vent port was disconnected, repair restriction in hose for fuel tank vent port from fuel tank pressure release/rollover valve to the EVAP canister. Perform TEST VER-5A.
10. Disconnect purge vacuum hose at EVAP canister while monitoring the pressure. see scheme 70 If pressure decreases when purge vacuum hose was disconnected, replace EVAP canister. Perform TEST VER-5A. If pressure does not decrease when purge vacuum hose was disconnected, repair restriction in purge vacuum hose from EVAP canister to the EVAP purge solenoid. Perform TEST VER-5A.

TEST TC-190A - CNG FUEL SYSTEM PRESSURE TOO HIGH

Note. Test applies only to 3.3L Compressed Natural Gas (CNG). For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Scheme 146

1. Diagnostic trouble code may be set by a low fuel level. Ensure ignition is off. Ensure fuel cylinders are at least 1/4 full before proceeding.
2. Note location of manual fuel shutoff valve located near front fuel cylinder on driver's side of the vehicle. (Scheme 146) (Scheme 146): Locating Manual Fuel Shutoff Valve, Fuel Pressure Regulator Fuel Cylinder Valves
3. Ensure manual fuel shutoff valve is in the OPEN position with valve handle in-line (parallel) with the fuel line. If valve handle is at 90-degree angle to the fuel line, manual fuel shutoff valve is in CLOSED position.
4. If manual fuel shutoff valve is in OPEN position, go to next step. If manual fuel shutoff valve is in CLOSED position, place manual fuel shutoff valve in OPEN position and perform TEST VER-1A.
5. Ensure all fuel cylinder valves located at end of each fuel cylinder is in OPEN position by rotating knob on fuel cylinder valve fully counterclockwise. (Scheme 146) If fuel cylinder valves are in OPEN position, go to next step. If fuel cylinder valves are in CLOSED position, place fuel cylinder valves in OPEN position and perform TEST VER-1A.
6. Turn ignition on. Using scan tool, read fuel pressure. If fuel pressure is more than 134 psi (9.4 kg/cm 2 ), go to next step. If fuel pressure is 134 psi (9.4 kg/cm 2 ) or less, condition required to set Diagnostic Trouble Code (DTC) is not present at this time. Test is complete.
7. Turn ignition off. Release fuel pressure. Install a 0-300 psi (0-21 kg/cm 2 ) fuel pressure gauge on fuel pressure test port on fuel rail. see scheme 73 Turn ignition on. Using scan tool, actuate fuel system and note fuel pressure.
8. If fuel pressure is more than 134 psi (9.4 kg/cm 2 ), turn ignition off. Release fuel pressure and replace fuel pressure regulator. Fuel pressure regulator is located behind shield, near front fuel cylinder. (Scheme 146) Perform TEST VER-1A.
9. If fuel pressure is 134 psi (9.4 kg/cm 2 ) or less, turn ignition off. Release fuel pressure and replace fuel pressure sensor. Fuel pressure sensor is located on fuel rail. see scheme 73 Perform TEST VER-1A.

TEST TC-192A - SLOW UPSTREAM O2 DURING CATALYST MONITOR

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. This Diagnostic Trouble Code (DTC) may be stored in Powertrain Control Module (PCM) if upstream oxygen sensor signal voltage is switching from less than .39 volt to more than .6 volt and back fewer times than required. Possible causes are: dirt/moisture or grease on connector causing voltage tracking, exhaust leak, fuel contamination, weak upstream oxygen sensor or engine mechanical problems. Upstream oxygen sensor is mounted on the exhaust manifold. Go to next step.
2. Start engine. Check for exhaust leaks between engine and catalytic converter. If no exhaust leaks exist, go to next step. If exhaust leaks exist, repair as necessary. Perform TEST VER-5A.
3. Check exhaust for excessive smoke caused by coolant entering combustion chambers or high oil consumption. If no excessive smoke is caused by coolant entering combustion chambers or high oil consumption, go to next step. If excessive smoke is caused by coolant entering combustion chambers or high oil consumption, repair engine as necessary and replace upstream oxygen sensor. Perform TEST VER-5A.
4. Ensure ignition is off. Disconnect connector at upstream oxygen sensor. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-5A. If terminals are not pushed out, miswired or damaged, go to next step.
5. Using ohmmeter, check resistance between ground and terminal No. 3 (Black/Light Blue wire) on wiring harness side of connector for upstream oxygen sensor. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Black/Light Blue wire between PCM and upstream oxygen sensor. The PCM is located between driver's side front fender and power distribution center, near battery. Perform TEST VER-5A.
6. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
7. Inspect connectors for damaged terminals. If connectors or terminals are damaged, repair as necessary. Perform TEST VER-5A. If connectors and terminals are not damaged, replace upstream oxygen sensor. Perform TEST VER-5A.

TEST NTC-1A - NO TROUBLE CODE TEST MENU

No Trouble Code Complete Test

Check Technical Service Bulletins (TSBs) for any pertinent information. If TSB exists, perform corrective procedure as instructed. If no TSB exists or if driveability problem still exists, perform TEST NTC-2A through TEST NTC-17A in sequence until driveability problem is found. See NO TROUBLE CODE TEST MENU table.

NO TROUBLE CODE TEST MENU

No Trouble Code Quick Individual Test

If any item listed in NO TROUBLE CODE TEST MENU table is suspected as cause of the driveability problem, perform associated test(s) individually. Return to NO TROUBLE CODE TEST MENU table if driveability problem still exists. No Trouble Code Quick Symptom Test Symptom checks cannot be used properly unless driveability problem occurs while vehicle is being driven. To reduce diagnostic time, ensure DTC TEST is reviewed before attempting to diagnosis a symptom. Select symptom which most accurately describes the driveability problem, and then perform test pertaining to the symptom. Perform each test in sequence until driveability problem is found. See NO TROUBLE CODE QUICK SYMPTOM TEST MENU table.

NO TROUBLE CODE QUICK SYMPTOM TEST MENU

TEST NTC-2A - CHECKING SECONDARY IGNITION & TIMING

Note. Perform TEST NTC-1A before proceeding.

1. Turn engine off. Connect engine analyzer to engine. Start engine and allow engine to idle. If engine will not idle, maintain engine speed at more than idle. Set scope on engine analyzer to read display or parade pattern. Analyze secondary ignition pattern using engine analyzer manufacturer's instructions.
2. If secondary ignition pattern is not correct, repair indicated component in secondary ignition system. Perform TEST VER-2A. If secondary ignition pattern is okay, go to next step.
3. Momentarily remove and reinstall spark plug wires from ignition coil one at a time while observing the secondary ignition kilovolt line.
4. If open circuit secondary ignition voltage is not at least 25 kilovolt, replace ignition coil. Perform TEST VER-2A. If open circuit secondary ignition voltage is at least 25 kilovolt, go to next step.
5. Turn ignition off. Remove all spark plugs and Auto Shutdown (ASD) relay. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. see scheme 74 see scheme 74: Locating ASD Relay & Identify Power Distribution Center Cavities
6. Check compression on all cylinders. If compression on all cylinders is at least 100 psi (7 kg/cm 2 ) and compression between all cylinders is within 25 percent of each other, go to next step. If compression on all cylinders is not at least 100 psi (7 kg/cm 2 ) and compression between all cylinders is not within 25 percent of each other, repair engine as necessary. Perform TEST VER-2A.
7. Reinstall spark plugs and ASD relay. Start engine and warm engine until engine coolant temperature is more than 180°F (82°C).
8. Using scan tool, monitor spark advance while increasing engine speed to 2000 RPM. If spark advance changes with engine RPM, secondary ignition system and spark advance are normal. Test is complete. If spark advance does not change with engine RPM, replace PCM. Perform TEST VER-2A. The PCM is located between driver's side front fender and power distribution center, near battery.

TEST NTC-3A - CHECKING FUEL PRESSURE (GASOLINE MODELS)

Note. Perform NTC-1A before proceeding.

Scheme 147

1. Turn ignition off. Release fuel pressure. Connect fuel pressure gauge to fuel pressure test port on fuel rail. Fuel pressure test port is located near center of front (radiator side) fuel rail.
2. Turn ignition on. Using scan tool, actuate ASD fuel system test and note fuel pressure. If fuel pressure is 43-53 psi (3.0-3.7 kg/cm 2 ), perform TEST NTC-3B. If fuel pressure is not 43-53 psi (3.0-3.7 kg/cm 2 ), go to next step.
3. Record fuel pressure. If pressure is more than 53 psi (3.7 kg/cm 2 ), perform TEST NTC-3C. If fuel pressure is 53 psi (3.7 kg/cm 2 ) or less, go to next step.
4. Using scan tool, stop ASD fuel system test. Turn ignition off. Inspect chassis fuel supply line from fuel pump module on top of fuel tank to the engine for kinks or restrictions. (Scheme 147) If kink or restriction exists in chassis fuel supply line, release fuel pressure and repair or replace chassis fuel supply line as necessary. Perform TEST VER-2A. If no kinks or restrictions exists on chassis fuel supply line, go to next step. (Scheme 147): Locating Fuel Pump Module, Fuel Filter & Fuel Lines
5. Release fuel pressure. Remove fuel pressure gauge. Install fuel pressure adapter and fuel pressure gauge on fuel supply line between fuel tank module and fuel filter. Fuel filter is located on top of fuel tank, near fuel pump module. (Scheme 147)
6. Turn ignition on. Using scan tool, actuate ASD fuel system test. Note fuel pressure.
7. If fuel pressure is at least 5 psi (.35 kg/cm 2 ) more than that recorded in step 3), stop actuation of ASD fuel system test. Release fuel pressure. Replace fuel filter. Perform TEST VER-2A.
8. If fuel pressure is not at least 5 psi (.35 kg/cm 2 ) more than that recorded in step 3), stop actuation of ASD fuel system test. Release fuel pressure. Replace fuel pump and fuel pressure regulator mounted on the bottom of fuel pump module located on top of fuel tank. Perform TEST VER-2A.

TEST NTC-3B - CHECKING FUEL PRESSURE

Note. Perform TEST NTC-3A before proceeding.

1. Using scan tool, stop ASD fuel system test. Apply parking brake. Place shift lever in Neutral. Start engine. While monitoring fuel pressure gauge, momentarily fully open throttle increasing engine speed to more than 3000 RPM.
2. If fuel pressure does not decrease to less than 35 psi (2.5 kg/cm 2 ), fuel pressure is normal. Test is complete. Release fuel pressure. Remove fuel pressure gauge. If fuel pressure decreases to less than 35 psi (2.5 kg/cm 2 ), go to next step.
3. Allow engine to idle. Place shift lever in Park. Turn ignition off. Inspect chassis fuel supply line from fuel pump module on top of fuel tank to the engine for kinks or restrictions. (Scheme 147) If no kinks or restrictions exist on chassis fuel supply line, go to next step. If kink or restriction exists in chassis fuel supply line, release fuel pressure and repair or replace chassis fuel supply line as necessary. Perform TEST VER-2A.
4. Release fuel pressure. Remove fuel pressure gauge. Remove fuel filter. Fuel filter is located on top of fuel tank, near fuel pump module. (Scheme 147) NOTE: Fuel lines are permanently attached to fuel filter. When removing fuel filter, disconnect fuel lines at fuel pump module and fuel supply line.
5. Using shop air, apply 40 psi (2.8 kg/cm 2 ) air pressure to fuel inlet passage on fuel filter while checking fuel filter for restrictions. If fuel filter is restricted, replace fuel filter. Perform TEST VER-2A. If fuel filter is not restricted, replace fuel pump and fuel pressure regulator mounted on the bottom of fuel pump module located on top of fuel tank. Perform TEST VER-2A.

TEST NTC-3C - CHECKING FUEL PRESSURE

Note. Perform TEST NTC-3A before proceeding.

1. Using scan tool, stop ASD fuel system test. Release fuel pressure. Remove fuel pressure gauge.
2. Remove fuel return line located between fuel pump module and fuel filter. (Scheme 147) Fuel filter is located on top of fuel tank, near fuel pump module.
3. Using shop air, apply 40 psi (2.8 kg/cm 2 ) air pressure on fuel return line while checking fuel return line for restrictions. If fuel return line is restricted, replace fuel return line. Perform TEST VER-2A. If fuel return line is not restricted, replace fuel pressure regulator mounted on bottom of fuel pump module located on top of fuel tank. Perform TEST VER-2A.

TEST NTC-3D - CHECKING FUEL PRESSURE (CNG MODELS)

Note. Perform NTC-1A before proceeding. Ensure fuel cylinders are at least 1/4 full before proceeding.

Scheme 148

1. Ensure fuel cylinders are at least 1/4 full. Ensure ignition is off. Install a 0-300 psi (0-21 kg/cm 2 ) fuel pressure gauge on fuel pressure test port on fuel rail. see scheme 73 Start engine and note fuel pressure.
2. If fuel pressure is 90-140 psi (6.3-9.8 kg/cm 2 ), go to step 6). If fuel pressure is not 90-140 psi (6.3-9.8 kg/cm 2 ), go to next step.
3. If fuel pressure is more than 140 psi (9.8 kg/cm 2 ), turn ignition off. Release fuel pressure and replace fuel pressure regulator. Fuel pressure regulator is located behind shield, near front fuel cylinder. (Scheme 146) Perform TEST VER-2A.
4. If fuel pressure is less than 90 psi (6.3 kg/cm 2 ), ensure fuel cylinders are at least 1/4 full, manual fuel shutoff valve is in the OPEN position, all fuel cylinder valves located at end of each fuel cylinder is in OPEN position, no kinks or bends exists in fuel lines and fuel filter is not restricted. Go to next step. NOTE: Manual fuel shutoff valve is located near front fuel cylinder on driver's side of the vehicle. Manual fuel shutoff valve is in OPEN position when valve handle in-line (parallel) with fuel line. If valve handle is at 90-degree angle to fuel line, manual fuel shutoff valve is in CLOSED position. Fuel cylinder valves are located at end of each fuel cylinder. Fuel cylinder valve OPEN position is obtained by rotating knob on fuel cylinder valve fully counterclockwise. Fuel filter is located in fuel pressure regulator. Fuel pressure regulator is located behind shield, near front fuel cylinder. (Scheme 146) (Scheme 148): Locating Fuel Filter & High Pressure Fuel Shutoff Solenoid
5. If problems are found in the fuel system components listed in step 4), repair as necessary. Perform TEST VER-2A. If no apparent problems are found, return to TEST NTC-1A and continue diagnostic procedures.
6. Using scan tool, read fuel pressure. Compare fuel pressure on scan tool with fuel pressure obtained on fuel pressure gauge.
7. If fuel pressure obtained on scan tool is within 5 psi (.35 kg/cm 2 ) of fuel pressure on fuel pressure gauge, fuel pressure is normal. Test is complete.
8. If fuel pressure obtained on scan tool is not within 5 psi (.35 kg/cm 2 ) of fuel pressure on fuel pressure gauge, turn ignition off. Release fuel pressure and replace fuel pressure sensor. Fuel pressure sensor is located on fuel rail. see scheme 73 Perform TEST VER-2A. Fuel pressure sensor may be referred to as low fuel pressure sensor.

TEST NTC-6A - CHECKING MAP SENSOR

Note. Perform TEST TC-118A, TC-119A, NTC-1A or NTC-5A before proceeding.

1. Ensure engine is off. Install vacuum "T" fitting and vacuum gauge on vacuum hose to MAP sensor. See MAP SENSOR LOCATIONS table. MAP SENSOR LOCATIONS Application (1) Location 3.3L On End Of Intake Manifold, Near Throttle Body (1) MAP sensor contains a 3-pin connector.
2. Start engine and allow engine to idle. If engine will not idle, maintain a constant RPM above idle. Using scan tool, read MAP sensor vacuum. Read engine vacuum on vacuum gauge.
3. If MAP sensor vacuum is not within one in. Hg of engine vacuum on vacuum gauge, replace MAP sensor. Perform TEST VER-2A. If MAP sensor vacuum is within one in. Hg of engine vacuum on vacuum gauge, MAP sensor is operating properly. Test is complete.

TEST NTC-7A - CHECKING OXYGEN SENSOR SWITCHING

Note. Perform NTC-1A or NTC-6A before proceeding.

1. On 3.3L Compressed Natural Gas (CNG) models, perform TEST NTC-7C. Start engine and warm engine to normal operating temperature.
2. With engine running, use scan tool to read oxygen sensor voltage for each oxygen sensor for at least 10 seconds. The downstream oxygen sensor voltage should switch slower than the upstream oxygen sensor voltage.
3. If oxygen sensor voltage for each oxygen sensor is switching normally, test is complete. If oxygen sensor voltage for each oxygen sensor is not switching normally, go to next step.
4. If upstream oxygen sensor remains locked on lean, perform TEST NTC-7B. If upstream oxygen sensor does not remain locked on lean, go to next step.
5. Turn engine off. Release fuel pressure. Connect fuel pressure gauge to fuel pressure test port on fuel rail. Fuel pressure test port is located near center of front (radiator side) fuel rail.
6. Turn ignition on. Using scan tool, actuate ASD fuel system test. Allow fuel pressure to stabilize. Using scan tool, stop ASD fuel system test. Monitor fuel pressure for one minute.
7. If fuel pressure decreases to less than 10 psi (.7 kg/cm 2 ), replace leaking injector(s) as necessary. Perform TEST VER-2A. Release fuel pressure. Remove fuel pressure gauge.
8. If fuel pressure does not decrease to less than 10 psi (.7 kg/cm 2 ), release fuel pressure. Remove fuel pressure gauge.
9. Inspect air cleaner and inlet ducts for restrictions. If air cleaner or inlet ducts are restricted, repair as necessary. Perform TEST VER-2A. If no restrictions exist, perform TEST NTC-17A.

TEST NTC-7B - CHECKING OXYGEN SENSOR SWITCHING

Note. Perform TEST NTC-7A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Allow engine to idle. Check engine vacuum for low vacuum or abnormal vacuum reading. If low vacuum or abnormal vacuum reading exists, repair as necessary. Perform TEST VER-2A. If vacuum is normal, go to next step.
2. With engine running, use scan tool to read oxygen sensor voltage for each oxygen sensor. If oxygen sensor voltage is less than .1 volt for upstream or downstream oxygen sensor, go to next step. If oxygen sensor voltage is .1 volt or more for upstream or downstream oxygen sensor, go to step 6).
3. Turn ignition off. Disconnect connector for the appropriate oxygen sensor in which the oxygen sensor voltage was less than .1 volt. Downstream oxygen sensor is mounted on exhaust pipe, behind catalytic converter. Upstream oxygen sensor is mounted on the exhaust manifold.
4. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
5. Using ohmmeter, check resistance between ground and terminal No. 4 (Black/Dark Green wire for upstream oxygen sensor or Tan/White wire for downstream oxygen sensor) on wiring harness side of connector for oxygen sensor. If resistance is less than 5 ohms, repair short to ground in Black/Dark Green wire for upstream oxygen sensor, or Tan/White wire for downstream oxygen sensor between PCM and oxygen sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, replace appropriate oxygen sensor. Perform TEST VER-2A.
6. With engine idling and at normal operating temperature, use scan tool to reset adaptive fuel memory. Use scan tool to read oxygen sensor voltage for each oxygen sensor for at least 10 seconds. The downstream oxygen sensor voltage should switch slower than the upstream oxygen sensor voltage.
7. If oxygen sensor voltage for each oxygen sensor is switching normally, test is complete. If oxygen sensor voltage for each oxygen sensor is not switching properly, perform TEST NTC-17A.

TEST NTC-7C - CHECKING OXYGEN SENSOR SWITCHING

Note. Perform NTC-1A or NTC-6A before proceeding. Test applies only to 3.3L Compressed Natural Gas (CNG).

1. Start engine and warm engine to normal operating temperature. With engine running, use scan tool to read oxygen sensor voltage for each oxygen sensor for at least 10 seconds. The downstream oxygen sensor voltage should switch slower than the upstream oxygen sensor voltage.
2. If oxygen sensor voltage for each oxygen sensor is switching normally, test is complete. If oxygen sensor voltage for each oxygen sensor is not switching normally, go to next step.
3. If upstream oxygen sensor remains locked on lean, perform TEST NTC-7D. If upstream oxygen sensor does not remain locked on lean, go to next step.
4. Turn engine off. Ensure ignition is off for at least 15 seconds and then turn ignition on with engine off. Using scan tool, read fuel pressure. Monitor fuel pressure for at least 10 seconds.
5. If fuel pressure decreases more than 5 psi (.35 kg/cm 2 ), go to step 7). If fuel pressure does not decrease more than 5 psi (.35 kg/cm 2 ), go to next step.
6. Inspect air cleaner and inlet ducts for restrictions. If air cleaner or inlet ducts are restricted, repair as necessary. Perform TEST VER-2A. If no restrictions exist, perform TEST NTC-17A.
7. Inspect fuel rail and fuel lines for leaks. If fuel leaks exist, repair fuel leaks as necessary. Perform TEST VER-2A. If no fuel leaks exist, release fuel pressure. Replace leaking fuel injector(s) as necessary. Perform TEST VER-2A.

TEST NTC-7D - CHECKING OXYGEN SENSOR SWITCHING

Note. Perform TEST NTC-1A or NTC-7C before proceeding. Test applies only to 3.3L Compressed Natural Gas (CNG). For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Allow engine to idle. Check engine vacuum for low vacuum or abnormal vacuum reading. If low vacuum or abnormal vacuum reading exists, repair as necessary. Perform TEST VER-2A. If vacuum is normal, go to next step.
2. With engine running, use scan tool to read oxygen sensor voltage for each oxygen sensor. If oxygen sensor voltage is less than .1 volt for upstream or downstream oxygen sensor, go to next step. If oxygen sensor voltage is .1 volt or more for upstream or downstream oxygen sensor, go to step 6).
3. Turn ignition off. Disconnect connector for the appropriate oxygen sensor in which the oxygen sensor voltage was less than .1 volt. Downstream oxygen sensor is mounted on exhaust pipe, behind catalytic converter. Upstream oxygen sensor is mounted on the exhaust manifold.
4. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
5. Using ohmmeter, check resistance between ground and terminal No. 4 (Black/Dark Green wire for upstream oxygen sensor or Tan/White wire for downstream oxygen sensor) on wiring harness side of connector for oxygen sensor. If resistance is less than 5 ohms, repair short to ground in Black/Dark Green wire for upstream oxygen sensor, or Tan/White wire for downstream oxygen sensor between PCM and oxygen sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, replace appropriate oxygen sensor. Perform TEST VER-2A.
6. With engine idling and at normal operating temperature, use scan tool to reset adaptive fuel memory. Use scan tool to read oxygen sensor voltage for each oxygen sensor for at least 10 seconds. The downstream oxygen sensor voltage should switch slower than the upstream oxygen sensor voltage.
7. If oxygen sensor voltage for each oxygen sensor is switching normally, test is complete. If oxygen sensor voltage for each oxygen sensor is not switching properly, perform TEST NTC-17A.

TEST NTC-8A - CHECKING OXYGEN SENSOR HEATER

Note. Perform TEST NTC-1A or NTC-7A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Turn ignition on. Using scan tool, actuate oxygen sensor heater test. Wait 2 minutes for upstream oxygen sensor voltage to stabilize.
2. Using scan tool, read upstream oxygen sensor voltage. If upstream oxygen sensor voltage is not .4-.6 volt, go to step 7). If upstream oxygen sensor voltage is .4-.6 volt, go to next step.
3. If upstream oxygen sensor voltage stays at .4-.6 volt, there is a problem in the sensor circuit. Ensure scan tool is still actuating oxygen sensor heater test. Disconnect connector at upstream oxygen sensor mounted on the exhaust manifold.
4. Using voltmeter, check voltage at terminal No. 2 (Dark Green/Orange wire) on wiring harness side of connector for upstream oxygen sensor. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in Dark Green/Orange wire from Auto Shutdown (ASD) relay. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. Perform TEST VER-2A.
5. Using scan tool, stop oxygen sensor heater test. Using ohmmeter, check resistance between ground and terminal No. 1 (Black wire) on wiring harness side of connector for upstream oxygen sensor.
6. If resistance is less than 5 ohms, replace upstream oxygen sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Black wire to ground. Perform TEST VER-2A.
7. Ensure scan tool is still actuating oxygen sensor heater test. Using scan tool, read downstream oxygen sensor voltage. If downstream oxygen sensor voltage is not .4-.6 volt, use scan tool to stop oxygen sensor heater test. Test is complete. If downstream oxygen sensor voltage is .4-.6 volt, go to next step.
8. If downstream oxygen sensor voltage stays at .4-.6 volt, there is a problem in the sensor circuit. Ensure scan tool is still actuating oxygen sensor heater test. Disconnect connector at downstream oxygen sensor mounted on exhaust pipe, behind catalytic converter.
9. Using voltmeter, check voltage at terminal No. 2 (Dark Green/Orange wire) on wiring harness side of connector for downstream oxygen sensor. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in Dark Green/Orange wire from Auto Shutdown (ASD) relay. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. Perform TEST VER-2A.
10. Using scan tool, stop oxygen sensor heater test. Using ohmmeter, check resistance between ground and terminal No. 1 (Black/Tan wire) on wiring harness side of connector for downstream oxygen sensor.
11. If resistance is less than 5 ohms, replace downstream oxygen sensor. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Black/Tan wire to ground. Perform TEST VER-2A.

TEST NTC-9A - CHECKING IDLE AIR CONTROL MOTOR

Note. Perform TEST NTC-1A or NTC-8A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Start engine. Using scan tool, actuate idle air control motor to 1400 RPM. If engine speed sets at 1300-1500 RPM, return engine to normal idle. Idle speed motor is operating properly. Test is complete. If engine speed does not set at 1300-1500 RPM, go to next step.
2. Return engine to normal idle. Inspect engine for vacuum leaks. If vacuum leaks exist, repair vacuum leaks as necessary. Perform TEST VER-2A. If no vacuum leaks exist, go to next step.
3. Disconnect connector at idle air control motor. Idle air control motor is mounted on the throttle body and contains a 4-pin connector.
4. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-2A. If terminals are not pushed out, miswired or damaged, replace idle air control motor. Perform TEST VER-2A.

TEST NTC-10A - CHECKING PARK/NEUTRAL POSITION SWITCH

Note. Perform TEST TC-114A, NTC-1A or NTC-9A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Note. Park/neutral switch is used on 3-speed models and transmission range sensor is used on 4-speed models. Transmission range sensor may be referred to as park/neutral switch.

1. Apply parking brake. Using scan tool, read park/neutral switch state while moving shift lever from Park to Reverse.
2. If scan tool display corresponds with shift lever position, park/neutral switch is functioning correctly. Test is complete. If scan tool display does not correspond with shift lever position, go to next step.
3. Turn ignition off. Place shift lever in Park. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
4. Using ohmmeter, check resistance between ground and PCM connector terminal No. 76 (Black/White wire) while moving shift lever from Park to Reverse. If resistance changes from less than 5 ohms to more than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance does not change from less than 5 ohms to more than 5 ohms, go to next step.
5. If resistance does not remain less than 5 ohms at all times, go to next step. If resistance remains less than 5 ohms at all times, repair short to ground in Black/White wire between PCM and park/neutral switch (3-speed) or transmission range sensor (4-speed). Perform TEST VER-2A. Park/neutral switch (3-speed) or transmission range sensor (4-speed) are located on transaxle. see scheme 77and see scheme 78. see scheme 77: Locating Park/Neutral Switch (3-Speed Models) see scheme 78: Locating Transmission Range Sensor (4-Speed Models)
6. Disconnect connector at park/neutral switch (3-speed) or transmission range sensor (4-speed) on transaxle. see scheme 77and see scheme 78.
7. Using ohmmeter, check resistance between Black/White wire on connector for park/neutral switch (3-speed) or transmission range sensor (4-speed) and PCM connector terminal No. 76 (Black/White wire). If resistance is less than 5 ohms, replace park/neutral switch (3-speed) or transmission range sensor (4-speed). Perform TEST VER-2A. If resistance is 5 ohms or more, repair open circuit in Black/White wire between PCM and park/neutral switch (3-speed) or transmission range sensor (4-speed). Perform TEST VER-2A.

TEST NTC-11A - CHECKING PCM POWER & GROUND CIRCUITS

Note. Perform TEST NTC-1A or NTC-10A before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Turn ignition off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
2. Using ohmmeter, check resistance between ground and PCM connector terminal No. 10 (Black/Tan wire). If resistance is 5 ohms or more, repair open circuit in Black/Tan wire between PCM and ground. Perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
3. Using ohmmeter, check resistance between ground and PCM connector terminal No. 50 (Black/Tan wire). If resistance is 5 ohms or more, repair open circuit in Black/Tan wire from PCM to ground. Perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
4. Turn ignition on. Using voltmeter, check voltage at fused ignition switch output circuit at PCM connector terminal No. 20 (White/Black wire).
5. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in fused ignition switch output circuit (White/Black wire) to PCM. White/Black wire goes from PCM to power distribution center, and then to Positive Temperature Coefficient (PTC) No. 1 in junction block, located behind driver's side of instrument panel, to the left of steering column. The PTC receives voltage when ignition is on. Once open circuit is repaired, perform TEST VER-2A. NOTE: The PTC is a specified amperage solid-state circuit breaker located in junction box. The PTC may reset when all current is removed from PTC for approximately 20 seconds.
6. Turn ignition off. Reconnect install connectors on PCM connector. PCM ground and power circuits are okay. Test is complete.

TEST NTC-12A - CHECKING EVAPORATIVE EMISSION SYSTEM

Note. Perform TEST TC-118A, NTC-1A or NTC-10A before proceeding.

1. Start and warm engine to normal operating temperature. Inspect vacuum hose from EVAP purge solenoid to throttle body for leaks or restrictions. The EVAP purge solenoid is located near passenger's side strut tower. see scheme 79 see scheme 79: Locating EVAP Purge Solenoid & Typical EVAP System Test Port
2. If vacuum hose is okay, go to next step. If vacuum hose leaks or is restricted, repair or replace vacuum hose as necessary. Perform TEST VER-2A.
3. Inspect vacuum hose from EVAP purge solenoid to EVAP canister for leaks or restrictions. EVAP canister is located on frame rail, directly below the driver's seat.
4. If vacuum hose is okay, go to next step. If vacuum hose leaks or is restricted, repair or replace vacuum hose as necessary. Perform TEST VER-2A.
5. Ensure engine has been idling for at least 2 minutes after reaching normal operating temperature. Disconnect vacuum hose at EVAP purge solenoid that goes to the EVAP canister. see scheme 79
6. Check that vacuum is cycling through EVAP purge solenoid intermittently at a steady rate. If EVAP purge solenoid does not allow vacuum to cycle intermittently at a steady rate, replace EVAP purge solenoid. Perform TEST VER-2A. If EVAP purge solenoid allows vacuum to cycle intermittently at a steady rate, go to next step.
7. Turn ignition off. Apply less than 5 psi (.35 kg/cm 2 ) air pressure on vacuum hose that goes from EVAP purge solenoid to the EVAP canister. DO NOT apply more than 5 psi (.35 kg/cm 2 ) air pressure on vacuum hose.
8. If air flows through vacuum hose and EVAP canister, EVAP purge solenoid and vacuum hoses are okay. Test is complete. If air does not flow through vacuum hose and EVAP canister, go to next step.
9. Disconnect vacuum hose at EVAP canister that goes to the EVAP purge solenoid and apply light air pressure on vacuum hose. If air flows through vacuum hose, replace EVAP canister. Perform TEST VER-2A. If air does not flow through vacuum hose, repair or replace vacuum hose as necessary. Perform TEST VER-2A.

TEST NTC-13A - CHECKING EGR SYSTEM

Note. Perform TEST TC-118A or NTC-12A before proceeding. Test does not apply to 3.3L Compressed Natural Gas (CNG).

1. Ensure ignition is off. Disconnect vacuum supply hose at EGR solenoid. The EGR solenoid is located on top of EGR backpressure transducer and contains vacuum hose going to top of EGR valve.
2. Install vacuum gauge on disconnected vacuum supply hose. Start engine. If vacuum is more than 10 in. Hg at idle, go to step 5). If vacuum is 10 in. Hg or less at idle, go to next step.
3. Turn engine off. Disconnect EGR solenoid vacuum supply hose at intake manifold. Install vacuum gauge on vacuum supply hose port on intake manifold.
4. Start engine and note vacuum reading with engine idling. If vacuum is more than 10 in. Hg at idle, repair restriction or leak in vacuum supply hose to EGR solenoid. Perform TEST VER-2A. If vacuum is 10 in. Hg or less at idle, repair plugged vacuum port on intake manifold. Perform TEST VER-2A.
5. Turn engine off. Disconnect vacuum gauge from vacuum supply hose. Reinstall vacuum supply hose on EGR solenoid. Disconnect vacuum hose from top of EGR valve. Install vacuum gauge on disconnected vacuum hose.
6. Start engine. Disconnect connector at EGR solenoid while observing vacuum gauge. If vacuum is not more than 3 in. Hg, replace EGR valve assembly. Perform TEST VER-2A. If vacuum is more than 3 in. Hg, go to next step.
7. Turn engine off. Disconnect vacuum hose from signal tube (lower port) at base of EGR valve. This is the vacuum hose that fits between signal tube (lower port) at base of EGR valve and bottom port on EGR backpressure transducer.
8. Using shop air, apply 20 psi (1.4 kg/cm 2 ) air pressure on signal tube (lower port) on EGR valve. Open and close throttle while listening for a tone change. If tone does not change, go to next step. If tone changes, replace EGR valve assembly. Perform TEST VER-2A.
9. Remove shop air and reconnect vacuum hose on signal tube (lower port) at EGR valve. Connect vacuum pump on vacuum hose fitting on top of EGR valve. Start engine.
10. With engine idling, slowly apply vacuum to EGR valve while listening for a decrease in engine speed. If engine speed decreases, go to step 12). If engine speed does not decrease, go to next step.
11. Remove EGR valve assembly. Inspect passages in EGR valve and intake manifold for restrictions. If all passages are open, replace EGR valve assembly. Perform TEST VER-2A. If passages are restricted, clean passages as necessary and reinstall EGR valve. Perform TEST VER-2A.
12. Turn engine off. Apply 10 in. Hg of vacuum on EGR valve. Vacuum should hold for at least 30 seconds. If vacuum is maintained for 30 seconds, EGR system operation is normal. Test is complete. If vacuum cannot be maintained for 30 seconds, replace EGR valve assembly. Perform TEST VER-2A.

TEST NTC-14A - CHECKING ENGINE VACUUM

Note. Perform TEST TC-118A, NTC-1A or NTC-13A before proceeding.

1. Connect vacuum gauge to engine vacuum source. Start engine and allow engine to idle. Note engine vacuum reading. Turn engine off.
2. Engine vacuum should be steady and 13-22 in. Hg depending on the altitude. If engine vacuum is not within specification, perform NTC-17A. If engine vacuum is within specification, remove vacuum gauge. Test is complete.

TEST NTC-16A - CHECKING MINIMUM IDLE AIRFLOW

Note. Perform TEST NTC-1A before proceeding.

1. Check throttle body minimum airflow. See THROTTLE BODY MINIMUM AIRFLOW under IDLE SPEED & MIXTURE in appropriate WIRING DIAGRAMS - 3.3L article.
2. Check throttle body minimum airflow. See THROTTLE BODY MINIMUM AIRFLOW under IDLE SPEED & MIXTURE in appropriate ADJUSTMENTS - 3.3L article.
3. If throttle body minimum airflow idle RPM is within specification, throttle body is okay. Perform TEST VER-2A. If throttle body minimum airflow idle RPM is not within specification, go to next step.
4. Remove throttle body. With throttle fully open on throttle body, clean throttle body with parts cleaner. Using soft brush or pad, ensure throttle body bore and throttle plate are clean. Dry throttle body with compressed air.
5. Reinstall throttle body. Recheck throttle body minimum airflow. If throttle body minimum airflow idle RPM is within specification, throttle body is okay. Perform TEST VER-2A. If throttle body minimum airflow idle RPM is not within specification, replace throttle body. Perform TEST VER-2A.

TEST NTC-17A - CHECKING ENGINE MECHANICAL SYSTEMS

Note. Perform TEST TC-118A, TC-119A, NTC-7A, NTC-7B, NTC-14A or NTC-16A before proceeding.

Note. If coming to this test from an oxygen sensor test, and rich or lean condition is not corrected after checking items listed below, replace Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery. Perform TEST VER-2A.

At this point in diagnostic test procedure, all engine electrical control systems have been determined to be operating as designed and not causing a driveability problem. Following additional items should be checked as possible causes

1. Check for Technical Service Bulletins (TSBs) relating to driveability problem.
2. Check engine vacuum. Engine vacuum must be at least 13 in. Hg in with transaxle in Neutral.
3. Check valve timing.
4. Check engine compression.
5. Check camshaft lobes for abnormal wear.
6. Check crankshaft sensor slots for debris or deterioration. There are 3 sets of sensor slots areas on flywheel which contain 4 slots in each set.
7. Check exhaust system for restrictions.
8. Ensure PCV system is functioning properly.
9. Check camshaft and crankshaft sprockets.
10. Check torque converter stall speed.
11. Check power brake booster for internal vacuum leak.
12. Check fuel for contamination.
13. Ensure proper injector driver wiring is installed on correct injector. Ensure injector is not plugged or restricted.

TEST NS-SEL - NO START TEST SELECTION MENU

Note. Diagnostic Trouble Codes (DTCs) stored in Powertrain Control Module (PCM) must be repaired before using No Start (NS) tests for system diagnosis. Ensure battery is fully charged before proceeding with no start tests.

1. Check for stored DTCs before using no start tests. See DTC TEST for checking for DTCs. All DTCs must be repaired before continuing.
2. No start tests are recommended procedures for correcting a no start condition by the symptom. No start tests should be performed in the sequence listed. See NO START TEST SEQUENCE table.

NO START TEST SEQUENCE

TEST NS-1A - REPAIRING A NO CRANK CONDITION

Note. Perform TEST NS-SEL before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Note. Park/neutral switch is used on 3-speed models and is mounted on rear of transaxle, just above oil pan. Transmission range sensor is used on 4-speed models. Transmission range sensor may be referred to as park/neutral switch and is mounted on transaxle, near solenoid assembly. see scheme 77for park/neutral switch location and Fig. see scheme 78 for transmission range sensor location.

Scheme 149

Scheme 150

1. Ensure shift lever is in Park. Using scan tool, read park/neutral switch state. If scan tool displays PARK, go to next step. If scan tool does not display PARK, repair park/neutral switch (3-speed) or transmission range sensor (4-speed). Perform TEST VER-1A.
2. Note location of starter relay in power distribution center at driver's side front corner of engine compartment, near battery. (Scheme 149)
3. Remove starter relay from power distribution center. Using voltmeter, check voltage at cavity "B" (Red wire) for starter relay in power distribution center. (Scheme 149) (Scheme 149): Locating Starter Relay & Identifying Power Distribution Center Cavities
4. If voltage is more than 11.6 volts, go to next step. If voltage is 11.6 volts or less, repair open circuit in fused B+ circuit (Red wire) to starter relay. Red wire goes from battery, through fuse No. 5 in power distribution center and then to the starter relay. Once open circuit is repaired, perform TEST VER-1A.
5. Using voltmeter, check voltage at cavity "A" (Yellow/Red wire) for starter relay in power distribution center while attempting to crank the engine. (Scheme 149)
6. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in fused ignition switch output circuit (Yellow/Red wire) to starter relay. Yellow/Red wire goes from starter relay in power distribution center to Positive Temperature Coefficient (PTC) No. 10 in junction block, located behind driver's side of instrument panel, to the left of steering column. The PTC receives voltage when ignition is in START position. Once open circuit is repaired, perform TEST VER-1A. NOTE: The PTC is a specified amperage solid-state circuit breaker located in junction box. The PTC may reset when all current is removed from PTC for approximately 20 seconds. WARNING: Ensure all components are positioned away from engine components, as engine may crank over when performing the following step.
7. Ensure shift lever is in Park and parking brake is applied. Use care when performing this test procedure, as engine may crank over. Momentarily connect jumper wire between cavity "B" (Red wire) and cavity "D" (Brown wire) for starter relay in power distribution center. (Scheme 149)
8. If starter operates and engine cranks over, go to step 15). If starter does not operate and engine does not crank over, go to next step.
9. If start solenoid does not click when jumper wire was connected, go to next step. If start solenoid clicks when jumper wire was connected, go to step 13).
10. Disconnect jumper wire. Disconnect starter relay output wire (Brown wire) at starter solenoid. This is the small wire that goes from starter solenoid back to the starter relay.
11. Using ohmmeter, check resistance between starter relay output wire at starter solenoid and cavity "D" (Brown wire) for starter relay in power distribution center. (Scheme 149)
12. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Brown wire between starter solenoid and cavity "D" (Brown wire) for starter relay in power distribution center. Perform TEST VER-1A.
13. Reinstall starter relay. Check battery cables for excessive resistance by checking voltage drop on each battery cable. If voltage drop on battery cables was not greater than.2 volt, go to next step. If voltage drop on any battery cable was greater than.2 volt, repair battery cable for excessive resistance. Perform TEST VER-1A.
14. Attempt to rotate crankshaft one full revolution. If crankshaft will not rotate one full revolution, repair engine mechanical problem. Perform TEST VER-1A. If crankshaft rotates one full revolution, replace starter. Perform TEST VER-1A.
15. Using ohmmeter, check resistance between terminals No. 85 and 86 on starter relay. (Scheme 150) (Scheme 150): Identifying Starter Relay Terminals
16. If resistance is 100 ohms or less, go to next step. If resistance is more than 100 ohms, replace starter relay. Perform TEST VER-1A.
17. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
18. Use ohmmeter to check resistance between PCM connector terminal No. 8 (Tan wire) and cavity "C" for starter relay in power distribution center. (Scheme 149)
19. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open circuit in wire between PCM terminal No. 8 and cavity "C" for starter relay in power distribution center. Perform TEST VER-1A.
20. Reinstall starter relay. Ensure shift lever is in Park and parking brake is applied. Ensure all components are positioned away from engine components, as engine may crank over when performing the following step. WARNING: Ensure all components are positioned away from engine components, as engine may crank over when performing the following step.
21. Connect jumper wire between PCM connector terminal No. 8 (Tan wire) and ground.
22. Momentarily turn ignition switch to START position. If engine cranks, replace PCM. Perform TEST VER-1A. If engine does not crank, replace starter relay. Perform TEST VER-1A.

TEST NS-2A - REPAIRING A NO RESPONSE CONDITION

Note. Perform DTC TEST on TEST NS-SEL before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Scheme 151

1. Attempt to start vehicle. If vehicle starts, perform TEST NS-2B. If vehicle fails to start, go to next step.
2. Disconnect connector from throttle position sensor on throttle body. Turn ignition on. Using voltmeter, check voltage at Violet/White wire on connector for throttle position sensor.
3. If voltage is more than 6 volts, repair open circuit in Black/Tan ground wires at Powertrain Control Module (PCM) connector terminals No. 10 and 50. Perform TEST VER-1A. If voltage is 6 volts or less, go to next step.
4. Turn ignition off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
5. Turn ignition on. Using voltmeter, check voltage at PCM connector terminal No. 20 (White/Black wire).
6. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in fused ignition switch output circuit (White/Black wire) to PCM. White/Black wire goes from PCM to power distribution center, and then to Positive Temperature Coefficient (PTC) No. 1 in junction block, located behind driver's side of instrument panel, to the left of steering column. The PTC receives voltage when ignition is on through fuse in ignition fuse in power distribution center. Once open circuit is repaired, perform TEST VER-2A. NOTE: The PTC is a specified amperage solid-state circuit breaker located in junction box. The PTC may reset when all current is removed from PTC for approximately 20 seconds.
7. Using voltmeter, check voltage at PCM connector terminal No. 46 (Red/White wire). If voltage is more than 10 volts, perform TEST NS-2B. If voltage is 10 volts or less, go to next step. NOTE: Fuel pump fuse may be referred to as fuel pump relay fuse on gasoline models or as high pressure shutoff relay fuse on Compressed Natural Gas (CNG) models.
8. Remove fuel pump fuse from power distribution center at driver's side front corner of engine compartment, near battery. (Scheme 149) (Scheme 151): Locating Fuel Pump Fuse
9. Check condition of fuel pump fuse. If fuel pump fuse is okay, go to next step. If fuel pump fuse is defective, go to step 11).
10. Using voltmeter, check voltage at B+ cavity in power distribution center for fuel pump fuse. (Scheme 149) If voltage is more than 10 volts, repair open circuit in Red/White wire between fuel pump fuse and PCM connector terminal No. 46 (Red/White wire). Perform TEST VER-1A. If voltage is 10 volts or less, repair open circuit in Red wire between positive battery terminal and fuel pump fuse. Perform TEST VER-1A. NOTE: Fuel pump relay may be referred to as high pressure shutoff relay on Compressed Natural Gas (CNG) models.
11. Turn ignition off. Remove fuel pump relay. Fuel pump relay is located in power distribution center at driver's side front corner of engine compartment, near battery. see scheme 83 see scheme 83: Locating Fuel Pump Relay & Identifying Power Distribution Center Cavities
12. Using ohmmeter, check resistance between ground and cavity "B" (Red/White wire) in power distribution center for fuel pump relay. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Red/White wire from fuel pump fuse to fuel pump relay and PCM connector terminal No. 46. Replace defective fuel pump fuse. Perform TEST VER-1A.
13. Disconnect connector at fuel tank module located on top of fuel tank. see scheme 84 This is the connector for the fuel pump and fuel level sending unit. see scheme 84: Locating Fuel Pump Module, Fuel Filter & Fuel Lines
14. Using ohmmeter, check resistance between ground and terminal No. 1 (Dark Green/White wire) on connector for fuel tank module. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Dark Green/White wire between fuel pump relay and connector for fuel tank module. Replace defective fuel pump fuse. Perform TEST VER-1A.
15. Inspect Dark Green/White wire between fuel pump relay and connector for fuel tank module for a possible intermittent short to ground. If intermittent short to ground exists, repair wiring as necessary. Replace defective fuel pump fuse. Perform TEST VER-1A. If no intermittent short to ground exists, replace fuel pump and defective fuel pump fuse. Perform TEST VER-1A.

TEST NS-2B - REPAIRING A NO RESPONSE CONDITION

Note. Perform TEST NS-2A before proceeding. When performing this test, verify location of terminals and wire colors on data link connector, as some wires with the same color are used at different terminals. For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. If ignition was on when NO RESPONSE was displayed on scan tool, go to next step. If ignition was not on when NO RESPONSE was displayed on scan tool, turn ignition and recheck display on scan tool. If NO RESPONSE is still displayed, go to next step.
2. Turn ignition off. Disconnect scan tool from data link connector. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery. NOTE: Ensure correct Pink wire is used when performing the following step, as 2 Pink wires are used in data link connector.
3. Using ohmmeter, check resistance between ground and cavity No. 7 (Pink wire) on data link connector. If resistance is less than 5 ohms, repair short to ground in Pink wire. Perform TEST VER-1A. If resistance is 5 ohms or more, go to next step.
4. Using ohmmeter, check resistance between ground and cavity No. 6 (Light Green wire) on data link connector. If resistance is less than 5 ohms, repair short to ground in Light Green wire. Perform TEST VER-1A. If resistance is 5 ohms or more, go to next step.
5. Using ohmmeter, check resistance between cavity No. 7 (Pink wire) on data link connector and PCM connector terminal No. 65 (Pink wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Pink wire between PCM and data link connector. Perform TEST VER-1A.
6. Using ohmmeter, check resistance between cavity No. 6 (Light Green wire) on data link connector and PCM connector terminal No. 75 (Light Green wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Light Green wire between PCM and data link connector. Perform TEST VER-1A.
7. Connect scan tool to functional data link connector on another vehicle. Turn ignition on. Using scan tool, attempt to read diagnostic trouble codes. If scan tool displays NO RESPONSE, go to next step. If scan tool does not display NO RESPONSE, replace PCM on original vehicle. Perform TEST VER-1A.
8. Substitute another scan tool adapter cable. Using scan tool, attempt to read diagnostic trouble codes. If scan tool displays NO RESPONSE, repair or replace scan tool as necessary. If scan tool does not display NO RESPONSE, replace adapter cable for scan tester.

TEST NS-3A - CHECKING CAMSHAFT & CRANKSHAFT POSITION SENSORS

Note. Perform TEST NS-SEL before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, monitor Camshaft Position (CMP) sensor and Crankshaft Position (CKP) sensor signal state while cranking engine for at least 15 seconds. If both CMP and CKP sensor signals are not present, go to next step. If both CMP and CKP sensor signal states are present, test is complete. Refer to TEST NS-SEL for additional symptom diagnostic information.
2. If only CMP signal state is present, perform TEST TC-40A. If no CMP signal state is present, perform TEST TC-1A.

TEST NS-4A - CHECKING SECONDARY IGNITION SYSTEM

Note. This procedure was rewritten as per TSB 26-02-99.

Note. Perform TEST NS-SEL before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY table. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Disconnect spark plug wire at cylinder No. 1. Cylinder No. 1 is front cylinder on right side when viewed from flywheel end of engine.
2. Install spark tester on spark plug wire. Connect spark tester to good engine ground. Crank engine for 10 seconds while checking for spark.
3. If good spark exists, test is complete. Refer to «TEST NS-SEL»(ref-24788-S40421471662001121700000) for additional symptom diagnostic information. If good spark does not exist, remove spark tester and reinstall spark plug wire.
4. Disconnect spark plug wire at cylinder No. 2 and repeat same procedure for spark test. If good spark exists, test is complete. Return to «TEST NS-SEL»(ref-24788-S40421471662001121700000). If good spark does not exist, reinstall spark plug wire. Go to next step.
5. Disconnect harness connector at ignition coil. Check connectors. Clean or repair as necessary. With test light connected to battery power, check each coil driver circuit while cranking engine. If test light flashed/blinked at each coil driver circuit, replace Power Control Module (PCM). Perform «TEST VER-1A»(ref-24788-S05945790672001121700000). If test light did not illuminate, go to next step
6. Check coil driver circuit for short to ground or open circuit. If open or short circuits are found, repair as necessary. If no problem is found, go to next step.
7. Turn ignition on. Using scan tool, actuate ignition coil No. 1. Using test light connected to ground, check ignition coil connector terminal No. 4 (Dark Green/Orange wire). If test light illuminated, replace ignition coil. Perform «TEST VER-1A»(ref-24788-S05945790672001121700000). If test light did not illuminate, go to next step.
8. Turn ignition off. Remove Auto Shutdown (ASD) relay. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. see scheme 85 With a test light connected to ground, check fused B+ circuit at ASD relay connector terminal "B". If test light is illuminated and bright, go to next step. If test light is not illuminated, repair open circuit in fused B+ circuit. Perform «TEST VER-1A»(ref-24788-S05945790672001121700000). see scheme 85: Locating ASD Relay & Identifying Power Distribution Center Cavities
9. Using an ohmmeter, measure resistance of ASD relay output circuit (Dark Green/Orange wire) between ASD relay connector and ignition coil connector. see scheme 85 If resistance is less than 5 ohms, replace ASD relay. If resistance is 5 ohms or more, repair open circuit on Dark Green/Orange wire between ASD relay and ignition coil. Perform «TEST VER-1A»(ref-24788-S05945790672001121700000).

TEST NS-5A - CHECKING FUEL SYSTEM (GASOLINE MODELS)

Note. Perform TEST NS-SEL before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Ensure throttle cables at throttle body are not holding the throttle open. If throttle cables are not holding throttle open, go to next step. If throttle cables are holding throttle open, repair components as necessary. Perform TEST VER-1A.
2. Using scan tool, read throttle position sensor voltage. If throttle position sensor voltage is 1.5 volts or less, go to step 4). If throttle position sensor voltage is more than 1.5 volts, go to next step.
3. Disconnect connector at throttle position sensor on throttle body. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair as necessary. Perform TEST VER-1A. If terminals are not pushed out, miswired or damaged, replace throttle position sensor. Perform TEST VER-1A.
4. If vehicle is equipped with factory vehicle theft security system, go to next step. If vehicle is not equipped with factory vehicle theft security system, go to step 6).
5. Using scan tool, read vehicle theft security system status. If scan tool indicates FUEL IS ON, go to next step. If scan tool does not indicate FUEL IS ON, perform vehicle theft security system test. See appropriate BODY CONTROL COMPUTER TESTS article in the ACCESSORIES & EQUIPMENT section. If no problem exists with the vehicle theft system, replace PCM. Perform TEST VER-1A. The PCM is located between driver's side front fender and power distribution center, near battery.
6. Using scan tool, actuate ASD fuel system test. Check for fuel pump operating sound at fuel pump located in fuel tank. If fuel pump operates, go to next step. If fuel pump does not operate, perform TEST NS-5D.
7. Turn ignition off. Release fuel pressure. Connect fuel pressure gauge to fuel pressure test port on fuel rail. Fuel pressure test port is located near center of front (radiator side) fuel rail.
8. Ensure fuel tank is at least 1/4 full. Turn ignition on. Using scan tool, actuate ASD fuel system test and note fuel pressure. If fuel pressure is more than 53 psi (3.7 kg/cm 2 ), perform TEST NS-5C. If fuel pressure is 53 psi (3.7 kg/cm 2 ) or less, go to next step.
9. If fuel pressure is less than 43 psi (3.0 kg/cm 2 ), record fuel pressure and perform TEST NS-5B. If fuel pressure is more than 43 psi (3.0 kg/cm 2 ), test is complete. Refer to TEST NS-SEL for additional symptom diagnostic information.

TEST NS-5B - REPAIRING LOW FUEL PRESSURE (GASOLINE MODELS)

Note. Perform TEST NS-5A before proceeding.

1. Record fuel pressure reading. Turn ignition off. Release fuel pressure. Remove fuel pressure gauge.
2. Turn ignition on. Using scan tool, actuate ASD fuel system test and note fuel pressure. Compare this fuel pressure reading to fuel pressure reading obtained previously in step 1).
3. If fuel pressure is now 43 psi (3.0 kg/cm 2 ) or more, repair restriction in chassis fuel supply between fuel filter outlet and fuel rail. Perform TEST VER-1A. If fuel pressure is not 43 psi (3.0 kg/cm 2 ) or more, go to next step.
4. Turn ignition off. Release fuel pressure. Remove adapter and fuel pressure gauge. Reinstall fuel line. Install fuel pressure adapter and fuel pressure gauge on fuel supply between fuel pump outlet on fuel pump module and fuel filter.
5. Turn ignition on. Using scan tool, actuate ASD fuel system test and note fuel pressure. If fuel pressure is more than 43 psi (3.0 kg/cm 2 ), replace fuel filter. Perform TEST VER-1A. If fuel pressure is 43 psi (3.0 kg/cm 2 ) or less, go to next step.
6. Turn ignition off. Release fuel pressure. Remove fuel pressure adapter and fuel pressure gauge. Remove fuel pump module with fuel pump from fuel tank. Inspect fuel pump inlet strainer on bottom of fuel pump for restrictions.
7. If fuel pump inlet strainer is restricted, replace fuel pump inlet strainer. Perform TEST VER-1A. If fuel pump inlet strainer is not restricted, replace fuel pump. Perform TEST VER-1A.

TEST NS-5C - REPAIRING HIGH FUEL PRESSURE (GASOLINE MODELS)

Note. Perform TEST NS-5A before proceeding.

1. Using scan tool, stop actuation of ASD fuel system test. Turn ignition off. Release fuel pressure. Remove fuel pressure gauge.
2. Remove fuel return line located between fuel pump module and fuel filter. Fuel filter is located on top of fuel tank, near fuel pump module on top of fuel tank.
3. Apply 40 psi (2.8 kg/cm 2 ) air pressure on fuel return line and check fuel return line for restrictions. If restriction exists in fuel return line, replace fuel return line. Perform TEST VER-1A. If no restriction exists in fuel return line, replace in-tank fuel pressure regulator located on fuel tank module. Perform TEST VER-1A.

TEST NS-5D - CHECKING FUEL PUMP (GASOLINE MODELS)

Note. Perform TEST NS-5A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Turn ignition off. Remove fuel pump relay. Fuel pump relay is located in power distribution center at driver's side front corner of engine compartment, near battery. see scheme 86
2. Using voltmeter, check voltage at cavity "B" (Red/White wire) for fuel pump relay in power distribution center. see scheme 86 If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in Red wire between positive battery terminal and fuse pump fuse No. 13 in power distribution center. Perform TEST VER-1A. see scheme 86: Identifying Fuel Pump Relay Location & Power Distribution Center Cavities
3. Install substitute fuel pump relay. Ensure fuel pump relay has same part number at original fuel pump relay. Attempt to start engine.
4. If engine starts, replace original fuel pump relay. Perform TEST VER-1A. If engine does not start, reinstall original fuel pump relay. Disconnect connector at fuel tank module, located on top of fuel tank. see scheme 87 This is the connector for the fuel pump and fuel level sending unit. see scheme 87: Identifying Fuel Pump Module, Fuel Filter & Fuel Lines
5. Ensure connector terminals are clean and have a tight fit on fuel tank module. Turn ignition on. Using scan tool, actuate ASD fuel system test. Using voltmeter, check voltage at terminal No. 1 (Dark Green/White wire) on connector for fuel tank module.
6. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in Dark Green/White wire between fuel pump relay and connector for fuel tank module. Perform TEST VER-1A.
7. Turn ignition off. Using ohmmeter, check resistance between ground and terminal No. 4 (Black wire) on connector for fuel tank module. If resistance is 5 ohms or more, repair open ground circuit in Black wire. Perform TEST VER-1A. If resistance is less than 5 ohms, replace fuel pump. Perform TEST VER-1A.

TEST NS-6A - CHECKING IDLE AIR CONTROL MOTOR

Note. Perform TEST NS-SEL before proceeding. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Depress throttle 1/4 of the way downward. Attempt to start engine. If engine starts and remains running, go to next step. If engine does not start and remain running, refer to TEST NS-SEL for additional symptom diagnostic information.
2. Release throttle. Turn ignition off. Remove idle air control motor from throttle body. Reinstall connector on idle air control motor. Turn ignition on. Using scan tool, actuate idle air control motor while observing tip of idle air control motor.
3. If tip of idle air control motor moves inward and outward, test is complete. Refer to TEST NS-SEL for additional symptom diagnostic information. If tip of idle air control motor does not move inward and outward, go to next step.
4. Using scan tool, check that no Diagnostic Trouble Codes (DTCs) exist pertaining to idle air control motor exist. If DTCs exist pertaining to idle air control motor, refer to appropriate DTC repair procedure. If no idle air control motor related DTCs exist, replace idle air control motor. Perform TEST VER-1A.

TEST NS-7A - REPAIRING A START & STALL CONDITION

Note. Perform TEST NS-SEL before proceeding.

At this point in diagnostic test procedure, all engine electrical control systems have been determined to be operating as designed and not causing a start and stall problem. Following additional items should be checked as possible causes

1. Check for Technical Service Bulletins (TSBs) relating to start and stall condition.
2. Check valve timing.
3. Check engine compression.
4. Check exhaust system for restrictions.
5. Ensure PCV system is functioning properly.
6. Check fuel for contamination.
7. Check secondary ignition system.
8. Check throttle body for dirt.
9. Check idle air control motor and passages for dirt or carbon.

TEST NS-8A - CHECKING ENGINE MECHANICAL SYSTEMS

Note. Perform TEST NS-SEL before proceeding.

1. Check for proper spark plug wire routing and firing order. Firing order is 1-2-3-4-5-6. Cylinder No. 2 is front cylinder on left side when viewed from flywheel end of engine. Cylinder No. 1 is front cylinder on right side when viewed from flywheel end of engine.
2. If spark plug wires are incorrect, repair as necessary. Perform TEST VER-1A. If spark plug wires are correct, go to next step.
3. Remove all spark plugs. Inspect sparks plugs for wetness caused by fuel. If spark plugs are not wet, go to next step. If spark plugs are wet, clean spark plugs and go to next step.
4. Check valve timing. See appropriate article in the ENGINES section. If valve timing is correct, go to next step. If valve timing is not correct, repair as necessary. Perform TEST VER-1A.
5. Check compression on all cylinders. See appropriate SPECIFICATIONS - 3.3L article for compression specifications. If compression is within specification, go to next step. If compression is not within specification, repair engine mechanical problem as necessary. Perform TEST VER-1A.
6. No start condition is not caused by an electrical problem. Repair engine mechanical problem as necessary. Perform TEST VER-1A.

TEST NS-9A - CHECKING FUEL SYSTEM (CNG MODELS)

Note. Perform TEST NS-SEL before proceeding. Test applies only to 3.3L CNG. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Scheme 152

1. Ensure ignition is off. Ensure fuel cylinders are at least 1/4 full before proceeding. Note location of manual fuel shutoff valve, located near front fuel cylinder on driver's side of the vehicle. see scheme 88
2. Ensure manual fuel shutoff valve is in OPEN position with valve handle in-line (parallel) with fuel line. If valve handle is at 90-degree angle to fuel line, manual fuel shutoff valve is in CLOSED position.
3. If manual fuel shutoff valve is in OPEN position, go to next step. If manual fuel shutoff valve is in CLOSED position, place manual fuel shutoff valve in OPEN position and perform TEST VER-1A.
4. Ensure all fuel cylinder valves located at end of each fuel cylinder is in OPEN position by rotating knob on fuel cylinder valve fully counterclockwise. see scheme 88 If all fuel cylinder valves are OPEN, go to next step. If fuel cylinder valves are in CLOSED position, open fuel cylinder valves and perform TEST VER-1A. see scheme 88: Locating Manual Fuel Shutoff Valve, Fuel Pressure Regulator Fuel Cylinder Valves NOTE: Low pressure fuel shutoff solenoid may be referred to as low pressure shutoff solenoid.
5. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Touch low pressure fuel shutoff solenoid and note if solenoid pulsates when ASD relay is actuated. Low pressure fuel shutoff solenoid is located on front of engine, near ignition coil. see scheme 90
6. If low pressure fuel shutoff solenoid pulsates, go to next step. If low pressure fuel shutoff solenoid does not pulsate, perform TEST NS-9C.
7. Touch high pressure fuel shutoff solenoid and note if solenoid is pulsates when ASD relay is actuated. High pressure fuel shutoff solenoid is located on fuel pressure regulator, located behind shield, near front fuel cylinder. (Scheme 152)and see scheme 90. (Scheme 152): Locating Low Pressure Fuel Shutoff Solenoid see scheme 90: Locating High Pressure Fuel Shutoff Solenoid & Fuel Pressure Regulator
8. If high pressure fuel shutoff solenoid pulsates, go to next step. If high pressure fuel shutoff solenoid does not pulsate, perform TEST NS-9D.
9. Using scan tool, read fuel pressure. If fuel pressure is 90 psi (6.3 kg/cm 2 ) or more, go to next step. If fuel pressure is less than 90 psi (6.3 kg/cm 2 ), perform TEST NS-9B.
10. If fuel pressure is more than 134 psi (9.4 kg/cm 2 ), go to next step. If fuel pressure is 134 psi (9.4 kg/cm 2 ) or less, go to step 13).
11. Turn ignition off. Release fuel pressure. Install a 0-300 psi (0-21 kg/cm 2 ) fuel pressure gauge on fuel pressure test port on fuel rail. see scheme 91 Turn ignition on. Using scan tool, actuate fuel system. Note fuel pressure on fuel pressure gauge. see scheme 91: Locating Fuel Temp. Sensor, Fuel Pressure Sensor & Fuel Pressure Test Port
12. If fuel pressure is 140 psi (9.8 kg/cm 2 ) or less, go to next step. If fuel pressure is more than 140 psi (9.8 kg/cm 2 ), turn ignition off. Release fuel pressure and replace fuel pressure regulator. Fuel pressure regulator is located behind shield, near front fuel cylinder. (Scheme 152)and see scheme 90. Perform TEST VER-1A.
13. Using scan tool, stop actuation of fuel system if actuated. Ensure throttle on throttle body is not being held open. If throttle is not being held open, go to next step. If throttle is being held open, repair throttle cables or components as necessary until throttle is fully closed. Perform TEST VER-1A.
14. Using scan tool, read throttle position sensor voltage. If throttle position sensor voltage is 1.5 volts or less, go to step 16). If throttle position sensor voltage is more than 1.5 volts, go to next step.
15. Disconnect connector at throttle position sensor on throttle body. Inspect connector for pushed out, miswired or damaged terminals. If terminals are pushed out, miswired or damaged, repair connector as necessary. Perform TEST VER-1A. If terminals are not pushed out, miswired or damaged, replace throttle position sensor. Perform TEST VER-1A.
16. Disconnect connector at injector No. 1. Injector No. 1 is first injector back from front (timing chain end) of engine on left side when viewed from flywheel end of engine. This injector is located above cylinder No. 2, but delivers fuel to cylinder No. 1, due to crossflow intake manifold.
17. Using scan tool, actuate fuel system. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for injector No. 1.
18. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in Dark Green/Orange wire between injector No. 1 and Auto Shutdown (ASD) relay. Perform TEST VER-1A. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. NOTE: Fuel pressure must be read immediately after disconnecting connector at low pressure fuel shutoff solenoid in the following step.
19. Disconnect connector from low pressure fuel shutoff solenoid. Using scan tool, read fuel pressure immediately after disconnecting connector from low pressure fuel shutoff solenoid. Low pressure fuel shutoff solenoid located on front of engine, near ignition coil. (Scheme 152)
20. If fuel pressure is 10 psi (.7 kg/cm 2 ) or less, go to next step. If fuel pressure is more than 10 psi (.7 kg/cm 2 ), reinstall connector on low pressure fuel shutoff solenoid. Fuel system is operating properly at this time. Test is complete.
21. Using scan tool, stop actuation of fuel system. Reinstall connector on low pressure fuel shutoff solenoid. Using scan tool, actuate fuel system. Using scan tool, stop actuation of fuel system and immediately read fuel pressure.
22. If fuel pressure is more than 10 psi (.7 kg/cm 2 ), perform TEST NS-9E. If fuel pressure is 10 psi (.7 kg/cm 2 ) or less, go to next step.
23. Remove air cleaner assembly. Using scan tool, actuate fuel system. Hold throttle open and listen for escaping gas from the throttle area.
24. If escaping gas is heard from throttle area, a leaking injector exists. Turn ignition off. Replace leaking injector(s) as necessary. Perform TEST VER-1A. If no escaping gas is heard from throttle area, turn ignition off. Fuel leak has been isolated to the fuel rail area. Repair fuel leak on fuel rail as necessary. Perform TEST VER-1A.

TEST NS-9B - CHECKING FUEL SYSTEM (CNG MODELS)

Note. Perform TEST NS-9A before proceeding. Test applies only to 3.3L CNG. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Note. Fuel pressure sensor may be referred to as fuel low-pressure sensor.

1. Using scan tool, stop actuation of ASD relay. Disconnect connector from fuel pressure sensor located on end of fuel rail. see scheme 91
2. Install jumper wire between terminals No. 2 (Violet/White wire) and No. 3 (Dark Green/Light Blue wire) on connector for fuel pressure sensor. Using scan tool, read fuel pressure.
3. If fuel pressure is more 130 psi (9.1 kg/cm 2 ), go to next step. If fuel pressure is 130 psi (9.1 kg/cm 2 ) or less, go to step 9).
4. Inspect all fuel lines for kinks or restrictions. If no kinks or restrictions exist, go to next step. If kinks or restrictions exist, repair fuel lines as necessary. Perform TEST VER-1A.
5. Ensure ignition is off. Release fuel pressure. Install a 0-300 psi (0-21 kg/cm 2 ) fuel pressure gauge on fuel pressure test port on fuel rail. see scheme 91 Turn ignition on. Using scan tool, actuate fuel system. Note fuel pressure on fuel pressure gauge.
6. If fuel pressure is more than 90 psi (6.3 kg/cm 2 ), release fuel pressure and replace fuel pressure sensor. Perform TEST VER-1A. Fuel pressure sensor is located on end of fuel rail. see scheme 91
7. If fuel pressure is 90 psi (6.3 kg/cm 2 ) or less, release fuel pressure and replace fuel filter. Fuel filter is located in fuel pressure regulator. see scheme 90 Fuel pressure regulator is located behind shield, near front fuel cylinder. (Scheme 152)and see scheme 90. Go to next step.
8. After replacing fuel filter, attempt to start engine. If engine starts, test is complete. If engine fails to start, release fuel pressure and replace fuel pressure regulator. Perform TEST VER-1A.
9. Remove jumper wire from connector for fuel pressure sensor. Using voltmeter, check voltage at terminal No. 2 (Violet/White) wire on connector for fuel pressure sensor.
10. If voltage is more than 4.5 volts, go to next step. If voltage is 4.5 volts or less, repair open circuit in Violet/White between PCM and fuel pressure sensor. The PCM is located between driver's side front fender and power distribution center, near battery. Perform TEST VER-1A.
11. Turn ignition off. Disconnect connectors from PCM. The PCM is located between driver's side front fender and power distribution center, near battery. Using ohmmeter, check resistance between ground and terminal No. 3 (Dark Green/Light Blue wire) on connector for fuel pressure sensor.
12. If resistance is more than 5 ohms, replace PCM. Perform TEST VER-1A. If resistance is 5 ohms or less, repair short to ground in Dark Green/Light Blue wire between PCM and fuel pressure sensor. Perform TEST VER-1A.

TEST NS-9C - CHECKING FUEL RELAYS & SOLENOIDS (CNG MODELS)

Note. Perform TEST NS-9A before proceeding. Test applies only to 3.3L CNG. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Note. Low pressure fuel shutoff solenoid may be referred to as low pressure shutoff solenoid. The Auto Shutdown (ASD) relay may be referred to as the low pressure shutoff relay.

1. Ensure ignition is off. Disconnect connector from low pressure fuel shutoff solenoid located on front of engine, near ignition coil. (Scheme 152)
2. Using ohmmeter, check resistance between ground and terminal No. 2 (Black wire) on connector for low pressure fuel shutoff solenoid. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open ground circuit in Black wire from low pressure fuel shutoff solenoid to ground. Perform TEST VER-1A.
3. Turn ignition on. Using scan tool, actuate generator field driver. Using voltmeter, check voltage at terminal No. 1 (Dark Green/Orange wire) on connector for low pressure fuel shutoff solenoid.
4. If voltage is more than 10 volts, replace low pressure fuel shutoff solenoid. Perform TEST VER-1A. If voltage is 10 volts or less, go to next step.
5. Turn ignition off. Remove ASD relay from power distribution center. see scheme 92 Power distribution center is located at driver's side front corner of engine compartment, near battery. Using voltmeter, check voltage at cavity "B" (fused B+ circuit) in power distribution center. see scheme 92 see scheme 92: Locating ASD Relay & Identifying Power Distribution Cavities
6. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in fused B+ circuit from battery, through fuse No. 12 in power distribution center and to ASD relay. Perform TEST VER-1A.
7. Using ohmmeter, check resistance between terminal No. 1 (Dark Green/Orange wire) on connector for low pressure fuel shutoff solenoid and cavity "D" (Dark Green/Orange wire) in power distribution center. see scheme 92
8. If resistance is less than 5 ohms, replace ASD relay. Perform TEST VER-1A. If resistance is 5 ohms or more, repair open circuit in Dark Green/Orange wire between low pressure fuel shutoff solenoid and cavity "D" (Dark Green/Orange wire) in power distribution center. Perform TEST VER-1A.

TEST NS-9D - CHECKING FUEL RELAYS & SOLENOIDS (CNG MODELS)

Note. Perform TEST NS-9A before proceeding. Test applies only to 3.3L CNG. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

Note. High pressure fuel shutoff solenoid may be referred to as high pressure shutoff solenoid. Fuel pump relay may be referred to as the high pressure shutoff relay.

1. Ensure ignition is off. Disconnect connector from high pressure fuel shutoff solenoid. High pressure fuel shutoff solenoid is located on fuel pressure regulator, located behind shield, near front fuel cylinder. (Scheme 152)and see scheme 90.
2. Using ohmmeter, check resistance between ground and terminal No. 1 (Black wire) on connector for high pressure fuel shutoff solenoid. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Black wire from high pressure fuel shutoff solenoid to ground. Perform TEST VER-1A.
3. Turn ignition on. Using scan tool, actuate fuel system. Using voltmeter, check voltage at terminal No. 2 (Dark Green/White wire) on connector for high pressure fuel shutoff solenoid.
4. If voltage is more than 10 volts, replace high pressure fuel shutoff solenoid. Perform TEST VER-1A. If voltage is 10 volts or less, go to next step. NOTE: Fuel pump relay may be referred to as high pressure fuel shutoff relay, or high pressure shutoff relay.
5. Turn ignition off. Remove fuel pump relay from power distribution center. see scheme 93 Power distribution center is located at driver's side front corner of engine compartment, near battery. Using voltmeter, check voltage at cavity "B" (fused B+ circuit) in power distribution center. see scheme 93 see scheme 93: Locating Fuel Pump Relay & Identifying Power Distribution Center Cavities
6. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit in fused B+ circuit (Red/White wire) from battery, through fuse No. 13 in power distribution center, and to fuel pump relay. Perform TEST VER-1A.
7. Using ohmmeter, check resistance between terminal No. 2 (Dark Green/White wire) on connector for high pressure fuel shutoff solenoid and cavity "D" (Dark Green/White wire) in power distribution center. see scheme 93
8. If resistance is less than 5 ohms, replace fuel pump relay. Perform TEST VER-1A. If resistance is 5 ohms or more, repair open circuit in Dark Green/White wire between high pressure fuel shutoff solenoid and cavity "D" (Dark Green/White wire) in power distribution center. Perform TEST VER-1A.

TEST NS-9E - CHECKING FUEL RELAYS & SOLENOIDS (CNG MODELS)

Note. Perform TEST NS-9A before proceeding. Test applies only to 3.3L CNG. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 3.3L article.

1. Using scan tool, check for Diagnostic Trouble Codes (DTCs) that pertain to an injector. If DTCs exist pertaining to an injector, refer to appropriate DTC repair procedure. If no DTCs exist pertaining to an injector, go to next step.
2. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
3. Disconnect connectors at all injectors. Using ohmmeter, check for short to ground in each individual injector control circuit at specified PCM connector terminals. See INJECTOR CONTROL CIRCUIT IDENTIFICATION table. NOTE: Injectors No. 1, 3 and 5 are on left side when viewed from flywheel end of engine. Injectors No. 2, 4 and 6 are on right side when viewed from flywheel end of engine. Injectors are located above opposite cylinders, but deliver fuel to corresponding cylinder, due to crossflow intake manifold. For example, injector No. 2 is first injector back from front (timing chain end) of engine on right side when viewed from flywheel end of engine. This injector is located above cylinder No. 1, but delivers fuel to cylinder No. 2, due to crossflow intake manifold. INJECTOR CONTROL CIRCUIT IDENTIFICATION PCM Connector Terminal No. & Wire Color Injector No. Control Circuit 13 (White/Dark Blue) 1 17 (Tan) 2 7 (Yellow/White) 3 16 (Light Blue/Brown) 4 15 (Gray) 5 14 (Brown/Dark Blue) 6
4. If short to ground exists on any injector control circuit, repair short to ground. Perform TEST VER-1A. If no short to ground exists on any injector control circuit, replace PCM. Perform TEST VER-1A.

TEST VER-1A - NO START VERIFICATION

1. Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. Inspect engine oil for fuel contamination. Change oil and filter as necessary. Attempt to start engine.
2. If engine does not start, check for Technical Service Bulletins (TSBs) that apply to vehicle and return to DTC TEST, if necessary. Repair is complete.

TEST VER-2A - ROAD TEST VERIFICATION

1. Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. If test is being performed after performing a NO TROUBLE CODE (NTC) test, go to next step. If test is being performed after performing a OBD-II TROUBLE CODE test, perform TEST VER-5. If test is being performed after any other TROUBLE CODE test, go to step 3).
2. Check if initial symptom still exists. If initial or another symptom exists, repair is not complete. Check for Technical Service Bulletins (TSBs) that apply to the symptom and return to TEST NTC-1A, if necessary.
3. If any DTCs have not been diagnosed, go to DTC TEST and finish diagnosing remaining DTCs as necessary. If all DTCs have been diagnosed, go to next step.
4. If Powertrain Control Module (PCM) has not been changed, use scan tool to erase DTCs from PCM. Using scan tool, reset all values in adaptive memory. Disconnect scan tool. To ensure no other DTCs remain, go to next step.
5. If this test is for a A/C relay control circuit DTC, ensure vehicle is road tested for at least 5 minutes with A/C on. For all DTCs, road test vehicle at a speed of at least 40 MPH. Stop vehicle. Turn engine off for at least 10 seconds. Start engine and continue road test. Ensure transaxle shifts through all gears. After road test, turn engine off. Go to next step.
6. Using scan tool, check for stored DTCs. If repaired DTC has reset, repair is not complete. Check for related Technical Service Bulletins (TSBs) and return to DTC TEST, if necessary. If another DTC exists, return to DTC TEST and follow path specified by other DTC. If no other DTCs exist, repair is now complete.

TEST VER-3A - CHARGING VERIFICATION

1. Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. If Powertrain Control Module (PCM) has been changed, go to next step. If PCM has not been changed, go to step 3).
2. If vehicle is equipped with factory vehicle theft security system, start vehicle at least 20 times so vehicle theft security system can be activated when desired. Using scan tool, erase DTCs from PCM.
3. To ensure no charging system problem exists, start engine. Increase engine speed to 2000 RPM for at least 30 seconds. Allow engine to idle. Turn engine off.
4. Using scan tool, check for stored DTCs. If repaired DTC has reset, repair is not complete. Check for related Technical Service Bulletins (TSBs) and return to DTC TEST, if necessary. If another DTC exists, return to DTC TEST and follow specified procedure specified by other DTC. If no other DTCs exist, repair is now complete.

TEST VER-4A - SPEED CONTROL VERIFICATION

1. Inspect vehicle to ensure all engine and speed control system components are connected. Reassemble and reconnect components as necessary. If Powertrain Control Module (PCM) has been changed, go to next step. If PCM has not been changed, go to step 3).
2. If vehicle is equipped with factory vehicle theft security system, start vehicle at least 20 times so vehicle theft security system can be activated when desired. Using scan tool, erase DTCs from PCM.
3. To ensure no speed control system problem exists, road test vehicle at a speed greater than 35 MPH. Depress steering wheel speed control ON/OFF switch to ON position. Depress and release steering wheel speed control SET switch.
4. If speed control engages, go to next step. If speed control does not engage, repair is not complete. Check for related Technical Service Bulletins (TSBs) and return to DTC TEST, if necessary.
5. Quickly depress and release steering wheel speed control RESUME/ACCEL switch. If vehicle speed increases by 2 MPH, go to next step. If vehicle speed does not increase by 2 MPH, repair is not complete. Check for related TSBs and return to DTC TEST, if necessary.
6. Using caution, depress and release brake pedal. If speed control disengages, go to next step. If speed control does not disengage, repair is not complete. Check for related TSBs and return to DTC TEST, if necessary.
7. Increase vehicle speed to 35 MPH. Depress steering wheel speed control RESUME/ACCEL switch. If vehicle resumes to original speed, go to next step. If vehicle does not resume to original speed, repair is not complete. Check for related TSBs and return to DTC TEST, if necessary.
8. Hold steering wheel speed control DECEL switch downward. If vehicle speed decreases, go to next step. If vehicle speed does not decrease, repair is not complete. Check for related TSBs and return to DTC TEST, if necessary.
9. Ensure vehicle speed is greater than 35 MPH. Release steering wheel speed control DECEL switch. If vehicle speed adjusts and sets at a new vehicle speed, go to next step. If vehicle speed does not adjust and set at a new vehicle speed, repair is not complete. Check for related TSBs and return to DTC TEST, if necessary.
10. Depress steering wheel speed control ON/OFF switch to OFF position. If speed control disengages, system is operating correctly. Repair is complete. If speed control does not disengage, repair is not complete. Check for related TSBs and return to DTC TEST, if necessary.

TEST VER-5A - ROAD TEST FOR OBD-II TROUBLE CODES

1. Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. If DTCs have not been diagnosed, go to DTC TEST and finish diagnosing remaining DTCs as necessary. If all DTCs have been diagnosed, go to next step.
2. Connect scan tool to data link connector. Ensure fuel tank is at least 1/4 full. Ensure A/C is off.
3. Proper way to ensure DTC is properly repaired, is to allow Powertrain Control Module (PCM) to run the monitor. Monitor operation may be observed on the scan tool. All specified enabling conditions for specified DTC must be met before PCM will operate the monitor.
4. Using scan tool, monitor the pretest enabling conditions until all conditions have been met. Once all enabling conditions are met, observe appropriate monitor for DTC on the scan tool.
5. If repaired DTC has reset or was seen in the monitor while on road test, repair is not complete. Check for related Technical Service Bulletins (TSBs) and return to DTC TEST, if necessary.
6. If another DTC exists, return to DTC TEST and follow path specified by other DTC. If no other DTCs exist, repair is now complete.