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Engine Controls - Tests W/codes - 3.5L: Diagnosis Chrysler LHS I

Testing & Diagnostics 12 illustrations ~18656 words

SYSTEM DIAGNOSTICS

CAUTIONWhen battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

Note. Self-diagnostic tests are written specifically for Chrysler's Diagnostic Readout Box (DRB). A generic scan tool may not be capable of performing all necessary test functions. Malfunction Indicator Light (MIL), also known as CHECK ENGINE light can be used, but has limited diagnostic capability.

The self-diagnostic capabilities of this system, if properly utilized, can simplify testing. The Powertrain Control Module (PCM) monitors several different engine control system circuits.

If a problem is sensed with a monitored circuit, PCM memory stores a trouble code, the Malfunction Indicator Light (MIL) glows and PCM enters limp-in mode. In limp-in mode, PCM compensates for component failure by substituting information from other sources. This allows vehicle operation until repairs can be made.

Test circuits and repair or replace components as required. If problem is repaired or ceases to exist, the PCM cancels trouble code after approximately 50 ignition on/off cycles on all models except LH body. On LH body, PCM cancels trouble code after approximately 50-100 ignition on/off cycles.

A specific trouble code results from a particular system failure. A trouble code does not condemn a specific component; component is not necessarily the reason for failure. Trouble codes only call out a probable malfunction area.

VISUAL INSPECTION

Most driveability problems in the engine control system result from faulty wiring, poor electrical connections or leaking air and vacuum hose connections. To avoid unnecessary component testing, perform a visual inspection before beginning self-diagnostic tests.

DIAGNOSTIC PROCEDURE

Note. DO NOT skip any steps in self-diagnostic tests or incorrect diagnosis may result. Ensure self-diagnostic tests apply to engine being tested.

If no trouble codes were found while performing BASIC DIAGNOSTIC PROCEDURES, proceed with self-diagnostics. Always perform a visual inspection before attempting to diagnose engine control system problems. See VISUAL INSPECTION . Enter on-board diagnostics, and retrieve trouble code(s) using MIL or scan tool. See ENTERING ON-BOARD DIAGNOSTICS . If trouble codes are not present and/or scan tool is used, proceed to TEST TC-1A . Perform indicated VERIFICATION PROCEDURE test after repairs. See SELF-DIAGNOSTIC TESTS DIRECTORY table.

ENTERING ON-BOARD DIAGNOSTICS

Note. Although other scan testers are available, manufacturer recommends using DRB (Diagnostic Readout Box) to diagnose the system. Malfunction Indicator Light (MIL), also known as CHECK ENGINE light function can be used, but has limited diagnostic capability.

Scan Tool Diagnostic Mode

  1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). See DATA LINK CONNECTOR (DLC) table for connector location. (Scheme 1) DATA LINK CONNECTOR (DLC) Application DLC Location Concorde, Intrepid, LHS, New Yorker & Vision Right Of Steering Column, Next To Center Console
  2. Start engine (if possible). With foot on brake, move transmission shift lever through all positions, ending in Park. Turn A/C switch on and then off (if equipped).
  3. Turn engine off. Without starting engine again, turn ignition on. Using scan tool, access and record trouble codes.
  4. When scan tool trouble code message is obtained, refer to appropriate test number. To clear trouble codes, see CLEARING TROUBLE CODES.

Scheme 1

Scheme 1
Scheme 1

CLEARING TROUBLE CODES

CAUTIONWhen battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.
  1. If scan tool is not available, go to next step. If scan tool is available, follow prompts to erase trouble codes.
  2. Trouble codes may be cleared by disconnecting negative battery cable for at least 15 seconds, allowing PCM to clear trouble codes.

INACTIVE TROUBLE CODE CONDITION

This procedure applies if you have been sent here from diagnostic charts and have just attempted to simulate the condition that initially set the trouble code. 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 all pertinent Technical Service Bulletins (TSBs).

SELF-DIAGNOSTIC TESTS

Note. In following self-diagnostic tests, illustrations are courtesy of Chrysler Corp.

CHECKING SYSTEM FOR TROUBLE CODES

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE.

Note. Battery must be fully charged before proceeding.

  1. Attempt to start engine. If necessary, crank engine for up to 10 seconds. Connect scan tool to Data Link Connector (DLC). Record scan tool trouble codes. If scan tool screen displays NO RESPONSE, go to «TEST NS-6A»(ref-11020-S04961769512000111000000) .
  2. If scan tool has a blank screen or displays RAM TEST FAILURE, CARTRIDGE ERROR, KEY PAD TEST FAILURE, or LOW OR HIGH BATTERY, this indicates a scan tool failure. To diagnose and correct these conditions, see «TESTS W/CODES - BODY CONTROL COMPUTER»(ref-11041) article in ENGINE PERFORMANCE.
  3. If trouble codes are displayed, see «SCAN TOOL TROUBLE CODES LIST»(ref-11020-S15778841532000111000000) table and perform appropriate test(s). If scan tool does not display any trouble codes, refer to one of the following: for driveability problems, go to «TEST NTC-1A»(ref-11020-S42415196212000111000000) . For no-start problems, go to «TEST NS-1A»(ref-11020-S07247596452000111000000) . For cruise control problems, see appropriate article: «CRUISE CONTROL SYSTEM»(ref-11042) - Concorde, Intrepid, Vision «CRUISE CONTROL SYSTEM»(ref-123610) - LHS, New Yorker

For charging problems, see appropriate article

* ALTERNATOR & REGULATOR - Concorde, Intrepid, Vision

* ALTERNATOR & REGULATOR - LHS, New Yorker

For air conditioning problems, see appropriate article

* A/C-HEATER SYSTEM - AUTOMATIC - All Models

* A/C-HEATER SYSTEM - MANUAL - All Models But LHS

DTCScan Tool DisplayPerform Test No.
Code 11NO CRANK REFERENCE SIGNAL AT PCMTC-2A
Code 54NO CAM SYNC SIGNAL AT PCMTC-3A
Code 14MAP SENSOR VOLTAGE TOO LOWTC-4A
Code 14MAP SENSOR VOLTAGE TOO HIGHTC-5A
Code 13NO CHANGE IN MAP FROM START TO RUNTC-6A
Code 24THROTTLE POSITION SENSOR VOLTAGE LOWTC-7A
Code 24THROTTLE POSITION SENSOR VOLTAGE HIGHTC-8A
Code 21LEFT O2S STAYS AT CENTERTC-9A
Code 21RIGHT O2S STAYS AT CENTERTC-10A
Code 21LEFT O2S SHORTED TO VOLTAGETC-11A
Code 21RIGHT O2S SHORTED TO VOLTAGETC-12A
Code 52LEFT O2S STAYS ABOVE CENTER (RICH)TC-13A
Code 52RIGHT O2S STAYS ABOVE CENTER (RICH)TC-14A
Code 51LEFT O2S STAYS BELOW CENTER (LEAN)TC-15A
Code 51RIGHT O2S STAYS BELOW CENTER (LEAN)TC-16A
Code 23INTAKE AIR TEMPERATURE SENSOR VOLTAGE LOWTC-17A
Code 23INTAKE AIR TEMPERATURE SENSOR VOLTAGE HIGHTC-18A
Code 22ECT SENSOR VOLTAGE TOO LOWTC-19A
Code 22ECT SENSOR VOLTAGE TOO HIGHTC-20A
Code 33A/C PRESSURE SENSOR VOLTS TOO HIGHTC-21A
Code 33A/C PRESSURE SENSOR VOLTS TOO LOWTC-22A
Code 64FLEX FUEL SENSOR VOLTS TOO HIGHTC-23A
Code 64FLEX FUEL SENSOR VOLTS TOO LOWTC-23A
Code 64LOSS OF FLEX FUEL CALIBRATION SIGNALTC-24A
Code 16KNOCK SENSOR #1 CIRCUITTC-25A
Code 16KNOCK SENSOR #2 CIRCUITTC-26A
Code 15NO VEHICLE SPEED SENSOR SIGNALTC-27A
Code 25IDLE AIR CONTROL MOTOR CIRCUITSTC-28A
Code 27INJECTOR CONTROL CIRCUITTC-29A
Code 43IGNITION COIL PRIMARY CIRCUITTC-35A
Code 32EGR SYSTEM FAILURETC-38A
Code 32EGR SOLENOID CONTROL CIRCUITTC-39A
Code 31EVAP SOLENOID CONTROL CIRCUITTC-40A
Code 65MANIFOLD TUNE VALVE SOLENOID CIRCUITTC-41A
Code 35LOW SPEED FAN CTRL RELAY CIRCUITTC-42A
Code 35HIGH SPEED FAN CTRL RELAY CIRCUITTC-43A
Code 42AUTO SHUTDOWN RELAY CONTROL CIRCUITTC-44A
Code 33A/C CLUTCH RELAY CIRCUITTC-45A
Code 66NO CCD BUS MESSAGES FROM TCMTC-46A
Code 66NO CCD MESSAGES FROM BCMTC-47A
Code 17ENGINE IS COLD TOO LONG(1)
Code 53INTERNAL PCM FAILURE(2)
Code 62PCM FAILURE SRI MILES NOT STORED(2)
Code 44BATTERY TEMP SENSOR VOLTS OUT OF LIMIT(3)
Code 41GENERATOR FIELD NOT SWITCHING PROPERLY(3)
Code 47CHARGING SYSTEM VOLTAGE TOO LOW(3)
Code 46CHARGING SYSTEM VOLTAGE TOO HIGH(3)
Code 34SPEED CONTROL SOLENOID CIRCUITS(4)
Code 34SPEED CONTROL SWITCH ALWAYS HIGH(4)
Code 34SPEED CONTROL SWITCH ALWAYS LOW(4)
Code 77SPEED CONTROL POWER RELAY CIRCUIT(4)
(1) - If engine temperature does not reach 176°F (80°C) after driving 20 minutes, check cooling system. Trouble code may also set in error during very cold slow speed driving. (2) - Replace Powertrain Control Module (PCM) and perform TEST VER-1. (3) - Refer to ALTERNATORS & REGULATORS - LH BODY article in STARTING & CHARGING SYSTEMS. (4) - Refer to CRUISE CONTROL SYSTEMS - LH BODY article in ACCESSORIES & EQUIPMENT.
(1)If engine temperature does not reach 176°F (80°C) after driving 20 minutes, check cooling system. Trouble code may also set in error during very cold slow speed driving.
(2)Replace Powertrain Control Module (PCM) and perform TEST VER-1.
(3)Refer to ALTERNATORS & REGULATORS - LH BODY article in STARTING & CHARGING SYSTEMS.
(4)Refer to CRUISE CONTROL SYSTEMS - LH BODY article in ACCESSORIES & EQUIPMENT.

SCAN TOOL TROUBLE CODES LIST

NO CRANK REFERENCE SIGNAL AT PCM (DTC 11)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, erase trouble codes. Attempt to start engine. If necessary, crank engine for at least 10 seconds. Read trouble codes. If scan tool displays NO SIGNAL or CAM ONLY, go to step 5). If scan tool does not display NO SIGNAL or CAM ONLY, go to next step.
  2. At this time, the condition required to set trouble code is not present. NO SIGNAL or CAM ONLY trouble code sets if Powertrain Control Module (PCM) does not see crank signal with cam signal present. Possible causes are: open 8-volt power supply at Crankshaft Position (CKP) sensor, open or shorted CKP sensor signal wire, open CKP sensor ground, failed CKP sensor, improperly adjusted CKP sensor, failed PCM, or failed transmission control module. Go to next step.
  3. Inspect CKP sensor wiring and connectors. Clean and repair wiring and connectors as required. If wiring and connectors are okay, go to next step.
  4. Start engine. Wiggle wiring harness from CKP to PCM. If engine misses or stalls when wiring harness is wiggled, repair wiring harness where wiggling caused problem. If engine does not miss or stall when wiring harness is wiggled, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  5. If scan tool displays NO SIGNAL or CAM ONLY in step 1), turn ignition off. Disconnect Crankshaft Position (CKP) sensor connector. Using scan tool in voltmeter mode, check voltage on CKP sensor connector terminal No. 1 (Orange wire). If voltage is less than 7 volts, go to TEST TC-2B. If voltage is more than 7 volts, go to next step.
  6. Connect one end of a jumper wire to CKP sensor connector terminal No. 3 (Light Blue/Dark Blue wire). Turn ignition on. Using scan tool, read DIS signal status. Observe scan tool while tapping other end of jumper wire to CKP sensor connector terminal No. 2 (Black/Light Blue wire). If scan tool displays CRANK ONLY, replace CKP sensor. If scan tool does not display CRANK ONLY, go to next step.
  7. Disconnect jumper wire. Using scan tool in ohmmeter mode, check resistance of CKP sensor connector terminal No. 2 (Black/Light Blue wire). If resistance is more than 5 ohms, repair open Black/Light Blue wire. If resistance is less than 5 ohms, go to next step.
  8. Ensure ignition is off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Inspect PCM connector. Repair any terminals that are damaged, pushed out or miswired. If PCM connector is okay, go to next step.
  9. Using an external ohmmeter, check resistance of Light Blue/Dark Blue wire between CKP sensor connector terminal No. 3 and PCM connector terminal No. 24. If resistance is more than 5 ohms, repair open Light Blue/Dark Blue wire. If resistance is less than 5 ohms, go to next step.
  10. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 24 (Light Blue/Dark Blue wire). If resistance is more than 5 ohms, replace PCM. If resistance is less than 5 ohms, go to next step.
  11. Disconnect Transmission Control Module (TCM) connector. TCM is located in engine compartment between left front fender and battery. Check resistance of PCM connector terminal No. 24 (Light Blue/Dark Blue wire). If resistance is more than 5 ohms, replace TCM. If resistance is less than 5 ohms, repair short to ground in Light Blue/Dark Blue wire.

NO CAM SYNC SIGNAL AT PCM (DTC 54)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, erase trouble codes. Attempt to start engine. If necessary, crank engine for at least 10 seconds. Using scan tool, read trouble codes. If scan tool displays CRANK ONLY, go to step 5). If scan tool does not display CRANK ONLY, go to next step.
  2. At this time, the condition required to set trouble code is not present. CRANK ONLY trouble code sets if Powertrain Control Module (PCM) does not see cam signal with crank signal present. Possible causes are: open 8-volt power supply at Camshaft Position (CMP) sensor, open or shorted CMP sensor signal wire, open CMP sensor ground, failed CMP sensor, improperly adjusted CMP sensor, or failed PCM. Go to next step.
  3. Inspect CMP wiring and connectors. Repair as required. If wiring and connectors are okay, go to next step.
  4. Start engine. Wiggle wiring harness from CMP sensor to PCM. If engine stalls when wiring harness is wiggled, repair area where wiggling caused problem to appear. If engine does not stall when wiring harness is wiggled, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  5. If scan tool displays CRANK ONLY in step 1), turn ignition off. Disconnect Camshaft Position (CMP) sensor connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on CMP sensor connector terminal No. 3 (Orange wire) on 3.3L engine or No. 1 (Orange wire) on 3.5L engine. If voltage is less than 7 volts, repair open Orange wire. If voltage is more than 7 volts, go to next step.
  6. Turn ignition off. Connect a jumper wire to CMP connector terminal No. 1 (Tan/Yellow wire) on 3.3L engine or No. 3 (Tan/Yellow wire) on 3.5L engine. Turn ignition on. Using scan tool, read DIS signal status. Observe scan tool while tapping other end of jumper wire to CMP sensor connector terminal No. 2 (Black/Light Blue wire). If scan tool displays CAM ONLY, replace CMP sensor. If scan tool does not display CAM ONLY, go to next step.
  7. Disconnect jumper wire. Turn ignition off. Using scan tool in ohmmeter mode, check resistance of CMP sensor connector terminal No. 2 (Black/Light Blue wire). If resistance is more than 5 ohms, repair open in Black/Light Blue wire. If resistance is less than 5 ohms, go to next step.
  8. Ensure ignition is off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Inspect PCM connector. Repair any terminals that are damaged, pushed out or miswired. If PCM connector is okay, go to next step.
  9. Using an external ohmmeter, check resistance of Tan/Yellow wire between PCM connector terminal No. 44 and CMP sensor connector terminal No. 1 on 3.3L engine or No. 3 on 3.5L engine. If resistance is more than 5 ohms, repair open Tan/Yellow wire. If resistance is less than 5 ohms, go to next step.
  10. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 44 (Tan/Yellow wire). If resistance is more than 5 ohms, replace PCM. If resistance is less than 5 ohms, repair short to ground in Tan/Yellow wire.

MAP SENSOR VOLTAGE TOO LOW (DTC 14)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, read MAP sensor voltage with engine running. If MAP sensor voltage is less than 0.2 volt, go to step 6). If MAP sensor voltage is more than 0.2 volt, turn ignition off. Go to next step.
  2. Turn ignition on (engine off). Using scan tool, read MAP sensor voltage. If MAP sensor voltage is less than 1.2 volts, go to step 6). If MAP sensor voltage is more than 1.2 volts, go to next step.
  3. Wiggle MAP sensor connector and harness while observing scan tool display. If MAP sensor voltage changes when MAP sensor connector and harness are wiggled, repair harness or connector that caused the voltage change. If MAP sensor voltage does not change when MAP sensor connector and harness are wiggled, go to next step.
  4. At this time, the condition required to set the trouble code is not present. MAP SENSOR VOLTAGE TOO LOW trouble code sets if MAP sensor output voltage is less than 1.2 volts at start, or less than 0.2 volt with engine running. Engine speed must be more than 400 RPM, but less than 1500 RPM, and TPS voltage less than one volt. Possible causes are: MAP sensor signal wire shorted to ground, MAP sensor shorted internally, or loss of MAP sensor 5-volt supply wire. Go to next step.
  5. Inspect MAP sensor wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  6. If MAP sensor voltage is less than 0.2 volt in step 1) or less than 1.2 volts in step 2), disconnect MAP sensor connector. Using scan tool, read MAP sensor voltage. If MAP sensor voltage is more than 4 volts, replace MAP sensor. If MAP sensor voltage is less than 4 volts, go to next step.
  7. Using scan tool in voltmeter mode, check voltage on MAP sensor connector terminal No. 3 (Violet/White wire). If voltage is less than 4.5 volts, repair open Violet/White wire. If voltage is more than 4.5 volts, go to next step.
  8. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using an external ohmmeter, check resistance between MAP sensor connector terminals No. 1 (Black/Light Blue wire) and No. 2 (Dark Green/Red wire). If resistance is less than 5 ohms, repair Black/Light Blue wire shorted to Dark Green/Red wire. If resistance is more than 5 ohms, go to next step.
  9. Using scan tool in ohmmeter mode, check resistance of MAP sensor connector terminal No. 2 (Dark Green/Red wire). If resistance is less than 5 ohms, repair short to ground in Dark Green/Red wire. If resistance is more than 5 ohms, replace PCM.

MAP SENSOR VOLTAGE TOO HIGH (DTC 14)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, read MAP sensor voltage. If MAP sensor voltage is more than 4.6 volts, go to step 5). If MAP sensor voltage is less than 4.6 volts, go to next step.
  2. Wiggle MAP sensor connector and harness while observing scan tool display. If MAP sensor voltage changes when MAP sensor connector and harness are wiggled, repair harness or connector that caused voltage change. If MAP sensor voltage does not change when MAP sensor connector and harness are wiggled, go to next step.
  3. At this time, the condition required to set trouble code is not present. MAP SENSOR VOLTAGE TOO HIGH trouble code sets if MAP sensor output voltage is more than 4.6 volts at start or with engine running. Engine speed must be more than 400 RPM, but less than 1500 RPM, and TPS voltage less than one volt. Possible causes are: MAP sensor signal wire open, MAP sensor open internally, MAP sensor ground wire open, or MAP sensor signal wire shorted to voltage. Go to next step.
  4. Inspect MAP sensor wiring and connector. Repair wiring and connector as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  5. If MAP sensor voltage is more than 4.6 volts in step 1), disconnect MAP sensor connector. Connect a jumper wire between MAP sensor connector terminals No. 1 (Black/Light Blue wire) and No. 2 (Dark Green/Red wire). Go to next step.
  6. Using scan tool, read MAP sensor voltage. If scan tool displays NO RESPONSE, repair Dark Green/Red wire for a short to Violet/White wire. If scan tool does not display NO RESPONSE, go to next step.
  7. If scan tool displays less than one volt, replace MAP sensor. If scan tool displays more than one volt, move jumper wire from MAP sensor connector terminal No. 1 (Black/Light Blue wire) to chassis ground. Go to next step.
  8. If scan tool displays less than one volt, repair open Black/Light Blue wire. If voltage is more than one volt, turn ignition off. Go to next step.
  9. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using an external ohmmeter, check resistance of Dark Green/Red wire between PCM connector terminal No. 1 and MAP sensor connector terminal No. 2. If resistance is less than 5 ohms, replace PCM. If resistance is more than 5 ohms, repair open MAP Dark Green/Red wire.

NO CHANGE IN MAP FROM START TO RUN (DTC 13)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Turn ignition on (engine off). Using scan tool, erase trouble codes. Start engine. Allow engine to run for 30 seconds. Using scan tool, read trouble codes. If scan tool does not display NO CHANGE IN MAP FROM START TO RUN, go to step 3). If scan tool displays NO CHANGE IN MAP FROM START TO RUN, go to next step.
  2. Turn ignition off. Disconnect MAP sensor connector. Turn ignition on (engine off). Using scan tool in voltmeter mode, check voltage on MAP sensor connector terminal No. 3 (Violet/White wire). If voltage is less than 4.5 volts, repair Violet/White wire as necessary. If voltage is more than 4.5 volts, replace MAP sensor.
  3. If scan tool does not display NO CHANGE IN MAP FROM START TO RUN in step 1), start engine. Using scan tool, set engine speed to 1500 RPM. With engine speed at 1500 RPM, read MAP sensor voltage. Go to next step.
  4. Wiggle MAP sensor connector and harness while observing scan tool display. If engine stalls or MAP sensor voltage becomes erratic when MAP sensor connector and harness are wiggled, repair harness or connector that caused the voltage change. If engine does not stall and MAP sensor voltage does not become erratic when MAP sensor connector and harness are wiggled, go to next step.
  5. Using scan tool, read MAP sensor vacuum. While observing scan tool display, snap throttle open and closed. If vacuum does not drop rapidly to zero in. Hg, go to step 7). If vacuum drops rapidly to zero in. Hg, go to next step.
  6. At this time, the condition required to set the trouble code is not present. NO CHANGE IN MAP FROM START TO RUN trouble code sets if too small a difference is seen between barometric pressure at key on and manifold vacuum after start up. Possible causes are: restricted or leaking vacuum/pressure to MAP sensor, ice in sensor or passage, or MAP sensor failure.
  7. If vacuum does not drop rapidly to zero in. Hg, in step 5), remove MAP sensor and check for restriction. If a restriction is present, remove restriction and reinstall MAP sensor. If restriction is not present, replace MAP sensor.

THROTTLE POSITION SENSOR VOLTAGE LOW (DTC 24)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, read Throttle Position Sensor (TPS) voltage. If TPS voltage is less than 0.2 volt, go to step 6). If TPS voltage is more than 0.2 volt, go to next step.
  2. Slowly open and close throttle. If voltage does not change smoothly when throttle is opened and closed, replace TPS. If voltage changes smoothly when throttle is opened and closed, go to next step.
  3. Wiggle TPS connectors and harnesses while observing scan tool display. If a change in TPS voltage is observed when wiggling TPS connectors and harnesses, repair connectors or harnesses that caused voltage to change. If a change in TPS voltage is not observed when wiggling TPS connectors and harnesses, go to next step.
  4. At this time, the condition required to set trouble code is not present. THROTTLE POSITION SENSOR VOLTAGE LOW trouble code sets if TPS voltage (Orange/Dark Blue wire) is less than 0.2 volt, or if vehicle speed is more than 20 MPH, engine speed is more than 1500 RPM, and engine vacuum is less than 2 in. Hg with TPS voltage less than 0.5 volt. Possible causes are: TPS signal wire shorted or TPS sensor failure. Go to next step.
  5. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  6. If TPS voltage is less than 0.2 volt in step 1), disconnect TPS connector. Using scan tool, read TPS voltage. If TPS voltage is less than one volt, replace TPS. If TPS voltage is more than one volt, go to next step.
  7. Using scan tool in voltmeter mode, check voltage on TPS connector terminal No. 3 (Violet/White wire). If voltage is less than 4 volts, repair open Violet/White wire. If voltage is more than 4 volts, go to next step.
  8. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using an external ohmmeter, check resistance between TPS connector terminals No. 1 (Black/Light Blue wire) and No. 2 (Orange/Dark Blue wire). If resistance is less than 5 ohms, repair Black/Light Blue for a short to Orange/Dark Blue wire. If resistance is more than 5 ohms, go to next step.
  9. Using scan tool in ohmmeter mode, check resistance of TPS connector terminal No. 2 (Orange/Dark Blue wire). If resistance is more than 5 ohms, replace PCM. If resistance is less than 5 ohms, go to next step
  10. Disconnect Transmission Control Module (TCM) connector. TCM is located in engine compartment between left front fender and battery. Using scan tool in ohmmeter mode, check resistance of TPS connector terminal No. 2 (Orange/Dark Blue wire). If resistance is more than 5 ohms, replace TCM. If resistance is less than 5 ohms, repair short to ground in Orange/Dark Blue wire.

THROTTLE POSITION SENSOR VOLTAGE HIGH (DTC 24)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, read Throttle Position Sensor (TPS) voltage. If TPS voltage is more than 4.5 volts, go to step 6). If TPS voltage is less than 4.5 volts, go to next step.
  2. Slowly open and close throttle while observing scan tool display. If voltage does not change smoothly when throttle is opened and closed, replace TPS. If voltage changes smoothly when throttle is opened and closed, go to next step.
  3. Wiggle TPS connectors and harnesses while observing scan tool display. If a change in TPS voltage is observed when wiggling TPS connectors and harnesses, repair connectors or harnesses that caused voltage to change. If a change in TPS voltage is not observed when wiggling TPS connectors and harnesses, go to next step.
  4. At this time, the condition required to set trouble code is not present. THROTTLE POSITION SENSOR VOLTAGE HIGH trouble code sets if TPS voltage is more than 4.5 volts. Possible causes are: TPS output wire open, TPS ground wire open, or TPS failure. Go to next step.
  5. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  6. If TPS voltage is more than 4.5 volts in step 1), disconnect TPS connector. Connect a jumper wire between TPS connector terminals No. 1 (Black/Light Blue wire) and No. 2 (Orange/Dark Blue wire). Using scan tool, read TPS voltage. If scan tool displays NO RESPONSE, repair Black/Light Blue for a short to Orange/Dark Blue wire. If scan tool does not display NO RESPONSE, go to next step.
  7. If scan tool displays less than one volt, replace TPS. If TPS voltage is more than one volt, move jumper wire from TPS connector terminal No. 1 (Black/Light Blue wire) to chassis ground. Go to next step.
  8. Using scan tool, read TPS voltage. If voltage is less than one volt, repair open Black/Light Blue wire. If voltage is more than one volt, go to next step.
  9. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using an external ohmmeter, check resistance of Orange/Dark Blue wire between PCM connector terminal No. 22 and TPS connector terminal No. 2. If resistance is less than 5 ohms, replace PCM. If resistance is more than 5 ohms, repair open Orange/Dark Blue wire.

LEFT O2S STAYS AT CENTER (DTC 21)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

Note. Scan tool displays left oxygen sensor as O2 and right oxygen sensor as O2R.

  1. Start engine. Using scan tool, read left Oxygen Sensor (O2S) voltage. If left O2S voltage is locked on 0.5 volt, go to step 5). If left O2S voltage is not locked on 0.5 volt, go to next step.
  2. Wiggle O2S wiring while observing scan tool display. If at any time O2S voltage locks on 0.5 volt when wiring is wiggled, repair harness or connector that caused voltage to lock (open circuit). If left O2S voltage does not lock on 0.5 volt when wiring is wiggled, go to next step.
  3. At this time, the condition required to set trouble code is not present. LEFT O2S STAYS AT CENTER trouble code sets if left O2S output voltage stays at 0.5 volt for 1.5 minutes with engine temperature more than 170°F (76.6°C) and engine running for 2 minutes. Possible causes are: left O2S circuit open or left O2S failure. Go to next step.
  4. Inspect left O2S wiring and connectors. Repair wiring and connectors as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  5. If left O2S is locked on 0.5 volt in step 1), disconnect left O2S connector. Using scan tool in ohmmeter mode, check resistance of O2S connector terminal No. 3 (Black/Light Blue wire). If resistance is more than 5 ohms, repair open Black/Light Blue wire. If resistance is less than 5 ohms, go to next step.
  6. Connect a jumper wire between left O2S connector terminal No. 2 (Black/Dark Green wire) and positive battery terminal. Using scan tool, read left O2S voltage. If voltage is more than one volt, replace left O2S. If voltage is less than one volt, go to next step.
  7. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Leave jumper wire connected. Using scan tool in voltmeter mode, check voltage on PCM connector terminal No. 41 (Black/Dark Green wire). If voltage is more than 10 volts, replace PCM. If voltage is less than 10 volts, repair open Black/Dark Green wire.

RIGHT O2S STAYS AT CENTER (DTC 21)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

Note. Scan tool displays left oxygen sensor as O2 and right oxygen sensor as O2R.

  1. Start engine. Using scan tool, read right Oxygen Sensor (O2S) voltage. If right O2S voltage is locked on 0.5 volt, go to step 5). If right O2S voltage is not locked on 0.5 volt, go to next step.
  2. Wiggle right O2S wiring while observing scan tool display. If at any time right O2S voltage locks on 0.5 volt, repair harness or connector that caused voltage to lock (open circuit). If right O2S voltage does not lock on 0.5 volt, go to next step.
  3. At this time, the condition required to set trouble code is not present. RIGHT O2S STAYS AT CENTER trouble code sets if right O2S output voltage stays at 0.5 volt for 1.5 minutes with engine temperature more than 170°F (76.6°C) and engine running for 2 minutes. Possible causes are: right O2S circuit open or right O2S failure. Go to next step.
  4. Inspect right O2S wiring and connectors. Repair wiring and connectors as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  5. If right O2S voltage is locked on 0.5 volt in step 1), disconnect right O2S connector. Using scan tool in ohmmeter mode, check resistance of O2S connector terminal No. 1 (Black/Light Blue wire). If resistance is more than 5 ohms, repair open Black/Light Blue wire. If resistance is less than 5 ohms, go to next step.
  6. Connect a jumper wire between right O2S connector terminal No. 2 (Tan/White wire) and positive battery terminal. Using scan tool, read right O2S voltage. If voltage is more than one volt, replace right O2S. If voltage is less than one volt, go to next step.
  7. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Leave jumper wire connected. Using scan tool in voltmeter mode, check voltage on PCM connector terminal No. 49 (Tan/White wire). If voltage is more than 10 volts, replace PCM. If voltage is less than 10 volts, repair open Tan/White wire.

LEFT O2S SHORTED TO VOLTAGE (DTC 21)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

Note. Scan tool displays left oxygen sensor as O2 and right oxygen sensor as O2R.

  1. Start engine. Using scan tool, read left Oxygen Sensor (O2S) voltage. If left O2S voltage is less than 1.2 volts, go to step 3). If left O2S voltage is more than 1.2 volts, go to next step.
  2. Disconnect left O2S connector. If left O2S voltage reads less than 1.2 volts, replace left O2S. If left O2S voltage reads more than 1.2 volts, repair short in Black/Dark Green wire.
  3. If left O2S voltage is less than 1.2 volts in step 1), wiggle left O2S connector and harness while observing scan tool display. If at any time left O2S voltage locks on 0.5 volt, repair harness or connector that caused voltage to lock (open circuit). If left O2S voltage does not lock on 0.5 volt, go to next step.
  4. At this time, the condition required to set trouble code is not present. LEFT O2S SHORTED TO VOLTAGE trouble code sets if left O2S signal wire voltage is more than 1.2 volts. Possible causes are: left O2S output for a short to another circuit, dirty/wet connection causing voltage tracking in connector, or left O2S failure. Go to next step.
  5. Inspect left O2S wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.

RIGHT O2S SHORTED TO VOLTAGE (DTC 21)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

Note. Scan tool displays left oxygen sensor as O2 and right oxygen sensor as O2R.

  1. Start engine. Using scan tool, read right Oxygen Sensor (O2S) voltage. If right O2S voltage is less than 1.2 volts, go to step 3). If right O2S voltage is more than 1.2 volts, go to next step.
  2. Disconnect right O2S connector. If right O2S voltage is less than 1.2 volts, replace right O2S. If right O2S voltage is more than 1.2 volts, repair short in Tan/White wire.
  3. If right O2S voltage is less than 1.2 volts in step 1), wiggle right O2S connector and harness while observing scan tool display. If at any time right O2S voltage jumps more than 1.2 volts while wiggling right O2 connector and harness, repair connector or harness that caused voltage to jump (short to voltage). If right O2S voltage does not jump more than 1.2 volts while wiggling right O2 connector and harness, go to next step.
  4. At this time, the condition required to set trouble code is not present. RIGHT O2S SHORTED TO VOLTAGE trouble code sets if right O2S signal wire voltage is more than 1.2 volts. Possible causes are: right O2S output for a short to another circuit, dirty/wet connection causing voltage tracking in connector, or right O2S failure. Go to next step.
  5. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.

LEFT O2S STAYS ABOVE CENTER (RICH) (DTC 52)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

Note. Scan tool displays left oxygen sensor as O2 and right oxygen sensor as O2R.

  1. Using scan tool, set engine speed to 1500 RPM. Read left Oxygen Sensor (O2S) voltage. If left O2S voltage is always less than 0.5 volt, go to step 3). If left O2S voltage is always more than 0.5 volt, go to next step.
  2. If LEFT O2S STAYS ABOVE CENTER (RICH) trouble code is not in memory, replace leaking injector for left intake manifold bank. If LEFT O2S STAYS ABOVE CENTER (RICH) trouble code is in memory, a condition causing engine to run rich in all cylinders is indicated. Go to «TEST NTC-1A»(ref-11020-S42415196212000111000000) .
  3. At this time, the condition required to set trouble code is not present. LEFT O2S STAYS ABOVE CENTER (RICH) trouble code sets if left O2S signal stays more than 0.5 volt but less than 1.2 volts without changing for more than 8 minutes. Possible causes are: high fuel pressure, other engine sensor calibrations, ignition system failure, left O2S failure, or fuel contamination. Go to TEST NTC-1A.

RIGHT O2S STAYS ABOVE CENTER (RICH) (DTC 52)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

Note. Scan tool displays left oxygen sensor as O2 and right oxygen sensor as O2R.

  1. Using scan tool, set engine speed to 1500 RPM. Read right Oxygen Sensor (O2S) voltage. If right O2S voltage is always less than 0.5 volt, go to step 3). If right O2S voltage is always more than 0.5 volt, go to next step.
  2. If RIGHT O2S STAYS ABOVE CENTER (RICH) trouble code is not in memory, replace leaking injector for right intake manifold bank. If RIGHT O2S STAYS ABOVE CENTER (RICH) trouble code is in memory, a condition causing engine to run rich in all cylinders is indicated. Go to «TEST NTC-1A»(ref-11020-S42415196212000111000000) .
  3. At this time, the condition required to set trouble code is not present. RIGHT O2S STAYS ABOVE CENTER (RICH) trouble code sets if right O2S signal stays more than 0.5 volt, but less than 1.2 volts without changing for more than 8 minutes. Possible causes are: high fuel pressure, other engine sensor calibrations, ignition system failure, right O2S failure, or fuel contamination. Go to TEST NTC-1A.

LEFT O2S STAYS BELOW CENTER (LEAN) (DTC 51)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

Note. Scan tool displays left oxygen sensor as O2 and right oxygen sensor as O2R.

  1. Using scan tool, set engine speed to 1500 RPM. Read left Oxygen Sensor (O2S) voltage. If left O2S voltage is always more than 0.5 volt, go to step 3). If left O2S voltage is always less than 0.5 volt, go to next step.
  2. If LEFT O2S STAYS BELOW CENTER (LEAN) trouble code is not in memory, replace restricted injector for left intake manifold bank. If LEFT O2S STAYS BELOW CENTER (LEAN) trouble code is in memory, a condition causing engine to run lean in all cylinders is indicated. Go to «TEST NTC-1A»(ref-11020-S42415196212000111000000) .
  3. At this time, the condition required to set trouble code is not present. LEFT O2S STAYS BELOW CENTER (LEAN) trouble code sets if left O2S signal stays less than 0.5 volt without changing for more than 8 minutes. Possible causes are: major vacuum leak, low fuel pressure, other engine sensor calibrations, ignition system failure, left O2S failure, or fuel contamination. Go to TEST NTC-1A.

RIGHT O2S STAYS BELOW CENTER (LEAN) (DTC 51)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

Note. Scan tool displays left oxygen sensor as O2 and right oxygen sensor as O2R.

  1. Using scan tool, set engine speed to 1500 RPM. Read right Oxygen Sensor (O2S) voltage. If right O2S voltage is always more than 0.5 volt, go to step 3). If right O2S voltage is always less than 0.5 volt, go to next step.
  2. If RIGHT O2S STAYS BELOW CENTER (LEAN) trouble code is not in memory, replace restricted injector for right intake manifold bank. If RIGHT O2S STAYS BELOW CENTER (LEAN) trouble code is in memory, a condition causing engine to run lean in all cylinders is indicated. Go to «TEST NTC-1A»(ref-11020-S42415196212000111000000) .
  3. At this time, the condition required to set trouble code is not present. RIGHT O2S STAYS BELOW CENTER (LEAN) trouble code sets if right O2S signal stays less than 0.5 volt without changing for more than 8 minutes. Possible causes are: major vacuum leak, low fuel pressure, other engine sensor calibrations, ignition system failure, right O2S failure, or fuel contamination. Go to TEST NTC-1A.

INTAKE AIR TEMP SENSOR VOLTAGE LOW (DTC 23)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, read Intake Air Temperature (IAT) sensor voltage. If voltage is less than 0.5 volt, go to step 4). If voltage is more than 0.5 volt, go to next step.
  2. Wiggle IAT sensor connector and harness while observing scan tool display. If IAT sensor voltage changes when connector and harness are wiggled, repair connector or harness that caused voltage to change. If IAT sensor voltage does not change when connector and harness are wiggled, go to next step.
  3. At this time, the condition required to set trouble code is not present. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  4. If IAT sensor voltage is less than 0.5 volt in step 1), disconnect IAT sensor connector. Using scan tool, read IAT sensor voltage. If voltage is more than 4 volts, replace IAT sensor. If voltage is less than 4 volts, go to next step.
  5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using an external ohmmeter mode, check resistance between IAT sensor connector terminals No. 1 (Black/Red wire) and No. 2 (Black/Light Blue wire). If resistance is less than 5 ohms, repair Black/Red for a short to Black/Light Blue wire. If resistance is more than 5 ohms, go to next step.
  6. Using scan tool in ohmmeter mode, check resistance of IAT sensor connector terminal No. 1 (Black/Red wire). If resistance is less than 5 ohms, repair short to ground in Black/Red wire. If resistance is more than 5 ohms, replace PCM.

INTAKE AIR TEMP SENSOR VOLTAGE HIGH (DTC 23)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, read Intake Air Temperature (IAT) sensor voltage. If IAT sensor voltage is more than 4.5 volts, go to step 4). If IAT sensor voltage is less than 4.5 volts, go to next step.
  2. Wiggle IAT sensor connector and harness while observing scan tool display. If IAT sensor voltage changes when connector and harness are wiggled, repair connector or harness that caused voltage to change. If IAT sensor voltage does not change when connector and harness are wiggled, go to next step.
  3. At this time, the condition required to set trouble code is not present. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  4. If IAT sensor voltage is more than 4.5 volts in step 1), disconnect IAT sensor connector. Connect a jumper wire between IAT sensor connector terminal No. 1 (Black/Red wire) and No. 2 (Black/Light Blue wire). Using scan tool, read IAT sensor voltage. If voltage is less than one volt, replace IAT sensor. If voltage is more than one volt, go to next step
  5. Move jumper wire from IAT sensor connector terminal No. 2 (Black/Light Blue wire) to chassis ground. If voltage is less than one volt, repair open Black/Light Blue wire. If voltage is more than one volt, go to next step.
  6. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using an external ohmmeter, check resistance of Black/Red wire between PCM connector terminal No. 21 and IAT connector terminal No. 1. If resistance is less than 5 ohms, replace PCM. If resistance is more than 5 ohms, repair open Black/Red wire.

ECT SENSOR VOLTAGE TOO LOW (DTC 22)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, read Engine Coolant Temperature (ECT) sensor voltage. If ECT sensor voltage is less than 0.5 volt, go to step 4). If ECT sensor voltage is more than 0.5 volt, go to next step.
  2. Wiggle ECT sensor connector and harness while observing scan tool display. If ECT sensor voltage changes when connector and harness are wiggled, repair connector or harness that caused voltage to change. If ECT sensor voltage does not change when connector and harness are wiggled, go to next step.
  3. At this time, the condition required to set trouble code is not present. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  4. If ECT sensor voltage is more than 0.5 volt in step 1), disconnect ECT sensor connector. Using scan tool, read ECT sensor voltage. If voltage is less than 4 volts, replace ECT sensor. If voltage is more than 4 volts, go to next step.
  5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 2 (Tan/Black wire). If resistance is less than 5 ohms, repair short to ground in Tan/Black wire. If resistance is more than 5 ohms, go to next step.
  6. Using an external ohmmeter, check resistance between ECT connector terminals No. 1 (Tan/Black wire) and No. 2 (Black/Light Blue wire). If resistance is less than 5 ohms, repair Tan/Black wire for short to Black/Light Blue wire. If resistance is more than 5 ohms, replace PCM.

ECT SENSOR VOLTAGE TOO HIGH (DTC 22)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, read Engine Coolant Temperature (ECT) sensor voltage. If voltage is more than 4.5 volts, go to step 5). If voltage is less than 4.5 volts, go to next step.
  2. Wiggle ECT sensor connector and harness while observing scan tool display. If ECT sensor voltage changes when connector and harness are wiggled, repair connector or harness that caused voltage to change. If ECT sensor voltage does not change when connector and harness are wiggled, go to next step.
  3. At this time, the condition required to set trouble code is not present. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  4. If ECT sensor voltage is more than 4.5 volts in step 1), disconnect ECT sensor connector. Connect a jumper wire between ECT sensor connector terminal No. 1 (Tan/Black wire) and No. 2 (Black/Light Blue wire). Using scan tool, read ECT sensor voltage. If voltage is less than one volt, replace ECT sensor. If voltage is more than one volt, go to next step.
  5. Move jumper wire from ECT connector terminal No. 2 (Black/Light Blue wire) to chassis ground. Using scan tool, read ECT sensor voltage. If voltage is less than one volt, repair open Tan/Black wire. If voltage is more than one volt, go to next step.
  6. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using an external ohmmeter, check resistance of Tan/Black wire between PCM connector terminal No. 2 and ECT sensor connector terminal No. 1. If resistance is less than 5 ohms, replace PCM. If resistance is more than 5 ohms, repair open Tan/Black wire.

A/C PRESSURE SENSOR VOLTS TOO HIGH (DTC 33)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

Scheme 2

Scheme 2: A/C PRESSURE SENSOR VOLTS TOO HIGH (DTC 33)
Scheme 2: A/C PRESSURE SENSOR VOLTS TOO HIGH (DTC 33)

Scheme 3

Scheme 3
Scheme 3

Scheme 4

Scheme 4
Scheme 4

Scheme 5

Scheme 5
Scheme 5

Scheme 6

Scheme 6
Scheme 6
  1. With the DRB, read the A/C pressure sensor voltage. If the A/C pressure sensor voltage above 4.6 volts, go to step 3. If the A/C pressure voltage is not above 4.6 volts, go to next step.
  2. Using the wiring diagram as a guide, wiggle A/C pressure sensor connector and harness. See AIR CONDITIONING in appropriate SYSTEM WIRING DIAGRAM article. Monitor the DRB display. If the A/C pressure sensor voltage changed, repair the harness or connector that caused the voltage to change. If the A/C pressure sensor voltage did not change, go to step 6.
  3. Disconnect the A/C pressure sensor. (Scheme 2) Connect a jumper wire between the A/C pressure sensor signal and sensor ground circuits. (Scheme 3) With the DRB, read the A/C pressure sensor voltage. If the voltage is below 1.0 volt, replace the A/C pressure sensor. If the voltage is not below 1.0 volt, go to next step.
  4. Move the jumper wire from A/C pressure sensor ground to engine ground. (Scheme 4) Read the A/C pressure sensor voltage. If the voltage is below 1.0 volt, repair the open sensor ground circuit. If the voltage is not below 1.0 volt, go to next step.
  5. Turn ignition off. Disconnect the PCM. (Scheme 5) Using an ohmmeter, test the A/C pressure sensor signal circuit for resistance. (Scheme 6) If the resistance is below 5 ohms, replace the PCM. If the resistance is not below 5 ohms repair the open sensor signal circuit.
  6. The condition required to set the code is not present. Using the wiring diagram as a guide, inspect the wiring and connectors. See AIR CONDITIONING in appropriate SYSTEM WIRING DIAGRAM article. If any problems were found, repair as necessary. If no problems were found, refer to Inactive Trouble Code Information. See «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000).

A/C PRESSURE SENSOR VOLTS TOO LOW (DTC 33)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

Scheme 7

Scheme 7: A/C PRESSURE SENSOR VOLTS TOO LOW (DTC 33)
Scheme 7: A/C PRESSURE SENSOR VOLTS TOO LOW (DTC 33)
  1. With the DRB, read the A/C pressure sensor voltage. If the A/C pressure sensor voltage is below 0.2 volt, go to step 3. If the A/C pressure sensor voltage is not below 0.2 volt go to next step.
  2. Using the wiring diagram as a guide and wiggle A/C pressure sensor connector and harness. See AIR CONDITIONING in appropriate SYSTEM WIRING DIAGRAM article. Monitor the DRB display. If there is any change in A/C pressure sensor voltage, repair the harness or connector that caused the voltage change. If there was not any change in A/C pressure sensor voltage, go to step 7.
  3. Disconnect the A/C pressure sensor connector. (Scheme 2) With the DRB in voltmeter mode, probe the 5-volt supply circuit. (Scheme 7) If the A/C pressure sensor 5-volt supply circuit is not above 4.9 volts, repair the open 5-volt supply circuit. If the A/C pressure sensor 5-volt supply circuit is above 4.9 volts, go to next step.
  4. Ensure that the A/C pressure sensor connector is still disconnected. With the DRB, read the A/C pressure sensor voltage. If the A/C pressure sensor voltage is above 4.5 volts, replace the A/C pressure sensor. If the A/C pressure sensor voltage is not above 4.5 volts, go to next step.
  5. Turn ignition off. Disconnect the PCM. (Scheme 5) With the DRB in ohmmeter mode, probe the A/C pressure sensor signal circuit. (Scheme 7) If the resistance is below 5.0 ohms, repair the sensor signal circuit for a short to ground. If the resistance is not below 5.0 ohms, go to next step.
  6. Using an ohmmeter, test the resistance between the A/C pressure sensor signal circuit and the sensor ground circuits. (Scheme 7) If the resistance is below 5.0 ohms, repair the sensor signal circuit shorted to the sensor ground circuit. If the resistance is not below 5.0 ohms, replace the PCM.
  7. The condition required to set the code is not present. Using the wiring diagram as a guide, inspect the wiring and connectors. See AIR CONDITIONING in appropriate SYSTEM WIRING DIAGRAM article. If any problems were found, repair as necessary. If no problems were found, refer to Inactive Trouble Code Information. See «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000).

FLEX FUEL SENSOR VOLTS TOO HIGH/LOW (DTC 64)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, read flex fuel sensor voltage. If voltage is more than 4.5 volts, go to step 6). If voltage is less than 4.5 volts, go to next step.
  2. If voltage is less than 0.2 volt, go to step 9). If voltage is more than 0.2 volt, wiggle flex fuel sensor connector and harness while observing scan tool display. Flex fuel sensor is located in trunk behind trunk liner on rear passenger seat lower crossmember. If flex fuel sensor voltage changes when flex fuel sensor connector and harness are wiggled, repair harness or connector that caused the voltage change. If flex fuel sensor voltage does not change when flex fuel sensor connector and harness are wiggled, go to next step.
  3. At this time, the condition required to set the trouble code is not present. FLEX FUEL SENSOR VOLTS TOO HIGH trouble code sets if flex fuel sensor output voltage is more than 4.5 volts. Possible causes are: flex fuel sensor signal wire open, flex fuel sensor failure, flex fuel sensor ground circuit open. Go to next step.
  4. FLEX FUEL SENSOR VOLTS TOO LOW trouble code sets if flex fuel sensor signal output voltage is less than 0.5 volt. Possible causes are: flex fuel sensor short to ground, flex fuel sensor failure, or powertrain control module failure. Go to next step.
  5. Inspect flex fuel sensor wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  6. If voltage is more than 4.5 volts in step 1), disconnect flex fuel sensor connector. Connect a jumper wire between flex fuel sensor connector terminals No. 1 (Yellow/White wire) and No. 2 (Black/Light Blue wire). Using scan tool, read flex fuel sensor voltage. If voltage is less than one volt, replace flex fuel sensor. If voltage is more than one volt, move jumper wire from flex fuel sensor connector terminal No. 2 (Black/Light Blue wire) to chassis ground. Go to next step.
  7. Using scan tool, read flex fuel sensor voltage. If voltage is less than one volt, repair open Black/Light Blue wire. If voltage is more than one volt, go to next step.
  8. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using scan tool in ohmmeter mode, check resistance of flex fuel sensor connector terminal No. 1 (Yellow/White wire). If resistance is less than 5 ohms, replace PCM. If resistance is more than 5 ohms, repair open Yellow/White wire.
  9. Disconnect flex fuel sensor connector. Flex fuel sensor is located in trunk behind trunk liner on rear passenger seat lower crossmember. Using scan tool, read flex fuel sensor voltage. If voltage is more than one volt, replace flex fuel sensor. If voltage is less than one volt, go to next step.
  10. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using an external ohmmeter, check resistance between flex fuel sensor connector terminals No. 1 (Yellow/White wire) and No. 2 (Black/Light Blue wire). If resistance is less than 5 ohms, repair Yellow/White wire shorted to Black/Light Blue wire. If resistance is more than 5 ohms, go to next step.
  11. Using scan tool in ohmmeter mode, check resistance of flex fuel sensor connector terminal No. 1 (Yellow/White wire). If resistance is more than 5 ohms, replace PCM. If resistance is less than 5 ohms, repair short to ground in Yellow/White wire.

KNOCK SENSOR #1 CIRCUIT (DTC 16)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, erase trouble codes. Test drive vehicle (knock sensor trouble code will only set while vehicle is decelerating). If knock sensor trouble code returns, go to step 5). If knock sensor trouble code does not return, go to next step.
  2. Wiggle knock sensor wiring harness between knock sensor and Powertrain Control Module (PCM). If knock sensor trouble code returns, repair harness between components where wiggling caused trouble code to return. If knock sensor trouble code did not return, go to next step.
  3. At this time, the condition required to set trouble code is not present. KNOCK SENSOR #1 CIRCUIT trouble code sets if knock sensor output falls below a minimum value during deceleration. Knock sensor trouble code also sets if knock sensor output is more than 5 volts. Possible causes are: knock sensor output wire open, knock sensor output wire shorted to ground or voltage, or knock sensor failure. Go to next step.
  4. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  5. If knock sensor trouble code returns in step 1), turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Disconnect No. 1 (left) knock sensor connector (Black/Light Green wire) at knock sensor common connector. Go to next step.
  6. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 42 (Black/Light Green wire). If resistance is less than 5 ohms, repair short to ground in Black/Light Green wire. If resistance is more than 5 ohms, go to next step.
  7. Turn ignition on (engine off). Using scan tool in voltmeter mode, check voltage on PCM connector terminal No. 42 (Black/Light Green wire). If voltage is more than 5 volts, repair short to voltage in Black/Light Green wire. If voltage is less than 5 volts, go to next step.
  8. Turn ignition off. Reconnect knock sensor common connector. Using an external ohmmeter, check resistance of Black/Light Green wire between No. 1 (left) knock sensor connector and PCM connector terminal No. 42. If resistance is less than 5 ohms, replace No. 1 (left) knock sensor. If resistance is more than 5 ohms, repair open Black/Light Green wire.

KNOCK SENSOR #2 CIRCUIT (DTC 16)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, erase trouble codes. Test drive vehicle (knock sensor trouble code will only set while vehicle is decelerating). If knock sensor trouble code returns, go to step 5). If knock sensor trouble code does not return, go to next step.
  2. Wiggle knock sensor wiring harness between knock sensor and Powertrain Control Module (PCM). If knock sensor trouble code returns, repair harness between components where wiggling caused trouble code to return. If knock sensor trouble code did not return, go to next step.
  3. At this time, the condition required to set trouble code is not present. KNOCK SENSOR #2 CIRCUIT trouble code sets if knock sensor output falls below a minimum value during deceleration. Knock sensor trouble code also sets if knock sensor output is more than 5 volts. Possible causes are: knock sensor output wire open, knock sensor output wire shorted to ground or voltage, or knock sensor failure.
  4. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  5. If knock sensor trouble code returns in step 1), turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Disconnect No. 2 (right) knock sensor connector (Gray/Black wire) at knock sensor common connector. Go to next step.
  6. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 10 (Gray/Black wire). If resistance is less than 5 ohms, repair short to ground in Gray/Black wire. If resistance is more than 5 ohms, go to next step.
  7. Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM connector terminal No. 10 (Gray/Black wire). If voltage is more than 5 volts, repair short to voltage in Gray/Black wire. If voltage is less than 5 volts, go to next step.
  8. Using an external ohmmeter, check resistance of Gray/Black wire between No. 2 (right) knock sensor connector and PCM connector terminal No. 10. If resistance is less than 5 ohms, replace No. 2 (right) knock sensor. If resistance is more than 5 ohms, repair open Gray/Black wire.

NO VEHICLE SPEED SENSOR SIGNAL (DTC 15)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

WARNINGKeep hands and feet clear of rotating wheels.
  1. Raise and support vehicle under lower control arms, allowing wheels to spin free. Start engine. Using scan tool, read Vehicle Speed Sensor (VSS) MPH. Place transmission in any forward gear. If scan tool does not display more than 0 MPH, go to step 4). If scan tool displays more than 0 MPH, go to next step.
  2. At this time, the condition required to set trouble code is not present. VEHICLE SPEED SENSOR (VSS) SIGNAL trouble code sets when Powertrain Control Module (PCM) does not see a speed signal under road load conditions. Possible causes are: open or shorted VSS wire, no VSS from Transmission Control Module (TCM), faulty TCM output speed circuit, failed PCM, or failed TCM.
  3. Inspect wiring and connectors. Repair wiring and connectors as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  4. If scan tool does not display more than 0 MPH in step 1), use scan tool to read Electronic Automatic Transmission (EATX) trouble codes. If any EATX trouble codes (Trouble Codes 50-58) are present, see the TRANSMISSION SERVICING article. If no EATX trouble codes are present, go to next step.
  5. Turn ignition off. Disconnect Transmission Control Module (TCM) connector. TCM is located in engine compartment between left front fender and battery. Turn ignition on. Using scan tool in voltmeter mode, check voltage on TCM connector terminal No. 58 (White/Orange wire). If voltage is more than 4 volts, go to step 9). If voltage is less than 4 volts, go to next step.
  6. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. If vehicle is equipped with Speed Proportional Steering (SPS), go to TEST TC-27B. If vehicle is not equipped with SPS, go to next step.
  7. Using an external ohmmeter, check resistance of White/Orange wire between PCM connector terminal No. 47 and TCM connector terminal No. 58. If resistance is more than 5 ohms, repair open White/Orange wire. If resistance is less than 5 ohms, go to next step.
  8. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 47 (White/Orange wire). If resistance is less than 5 ohms, repair short to ground in White/Orange wire. If resistance is more than 5 ohms, replace PCM.
  9. If voltage is more than 4 volts in step 6), read Vehicle Speed Sensor (VSS) MPH using scan tool. Connect one end of a jumper wire to TCM connector terminal No. 58 (White/Orange wire). While observing scan tool display, connect other end of jumper wire to chassis ground. If scan tool displays vehicle speed more than 0 MPH, replace TCM. If scan tool does not display vehicle speed more than 0 MPH, go to next step.
  10. Turn ignition off. Disconnect PCM connector. Using an external ohmmeter, check resistance of White/Orange wire between PCM connector terminal No. 47 and TCM connector terminal No. 58. If resistance is less than 5 ohms, replace PCM. If resistance is more than 5 ohms, repair open White/Orange wire.

IDLE AIR CONTROL MOTOR CIRCUITS (DTC 25)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, erase trouble codes. Using scan tool, actuate Idle Air Control (IAC) motor. If IAC motor trouble code returns, go to step 4). If IAC motor trouble code does not return, go to next step.
  2. At this time, the condition required to set trouble code is not present. IDLE AIR CONTROL MOTOR CIRCUITS trouble code sets if any of the 4 IAC motor connector wires are shorted to ground or to 12 volts. Open wires will not set this trouble code. Possible causes are: harness shorted to ground, harness shorted to 12 volts, or IAC motor shorted internally.
  3. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  4. If IAC motor trouble code returns in step 1), turn ignition off. Disconnect and inspect IAC motor connector. If any terminal is damaged, pushed out or miswired, repair IAC motor connector as necessary. If IAC motor connector is okay, go to next step.
  5. Turn ignition on. Using scan tool, erase trouble codes. Using scan tool, actuate IAC motor. If IAC motor trouble code does not return, replace IAC motor. If IAC motor trouble code returns, go to next step. NOTE: Voltage may switch or remain constant during steps 6)-9).
  6. Using scan tool in voltmeter mode, check voltage on IAC motor connector terminal No. 1 wire (Gray/Red wire). If voltage is not more than 10 volts at any time, go to TEST TC-28B. If voltage is more than 10 volts at any time, go to next step.
  7. Check voltage on IAC motor connector terminal No. 2 (Yellow/Black wire). If voltage is not more than 10 volts at any time, go to «TEST TC-28C»(ref-11020-S37766230972000111000000) . If voltage is more than 10 volts at any time, go to next step.
  8. Check voltage on IAC motor connector terminal No. 3 (Brown/White wire). If voltage is not more than 10 volts at any time, go to «TEST TC-28D»(ref-11020-S11924197662000111000000) . If voltage is more than 10 volts at any time, go to next step.
  9. Check voltage on IAC motor connector terminal No. 4 (Violet/Black wire). If voltage is not more than 10 volts at any time, go to «TEST TC-28E»(ref-11020-S08665761992000111000000) . If voltage is more than 10 volts at any time, go to next step.
  10. Turn ignition off. Disconnect and inspect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. If any terminal is damaged, pushed out or miswired, repair as necessary. If PCM connector is okay, go to next step.
  11. Using an external ohmmeter, check resistance between IAC motor connector terminal No. 1 (Gray/Red wire) and (in turn) terminals No. 2 (Yellow/Black wire), No. 3 (Brown/White wire) and No. 4 (Violet/Black wire). If resistance is less than 5 ohms between any circuit(s), repair circuit(s) shorted together. If resistance is more than 5 ohms on all circuits, go to next step.
  12. Using an external ohmmeter, check resistance between IAC motor connector terminal No. 2 (Yellow/Black wire) and (in turn) terminals No. 3 (Brown/White wire) and No. 4 (Violet/Black wire). If resistance is less than 5 ohms between any circuit(s), repair circuit(s) shorted together. If resistance is more than 5 ohms on all circuits, go to next step.
  13. Using an external ohmmeter, check resistance between IAC motor connector terminals No. 3 (Brown/White wire) and No. 4 (Violet/Black wire). If resistance is less than 5 ohms, repair circuit shorted together. If resistance is more than 5 ohms, replace PCM.

INJECTOR CONTROL CIRCUITS (DTC 27)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, erase trouble codes. Attempt to start engine. If necessary, crank engine for at least 10 seconds. Using scan tool, read trouble codes. Allow engine to idle for at least 20 seconds. If scan tool displays any injector control circuit codes, see INJECTOR CONTROL CIRCUIT CODES table and perform corresponding test. If scan tool does not display any injector control circuit codes, go to next step. INJECTOR CONTROL CIRCUIT CODES Scan Tool Display 3.5L Engine Test No. CONTROL CIRCUIT INJECTOR NO. 1 «TEST TC-29D»(ref-11020-S07105048332000111000000) INJECTOR NO. 2 «TEST TC-30C»(ref-11020-S22995249042000111000000) INJECTOR NO. 3 «TEST TC-31C»(ref-11020-S15926209122000111000000) INJECTOR NO. 4 «TEST TC-32C»(ref-11020-S04940681582000111000000) INJECTOR NO. 5 «TEST TC-33C»(ref-11020-S33984598782000111000000) INJECTOR NO. 6 «TEST TC-34C»(ref-11020-S19076729572000111000000)
  2. At this time, the condition required to set trouble code is not present. INJECTOR CONTROL CIRCUIT trouble code sets when Powertrain Control Module (PCM) does not detect injector turn off edge when expected. Possible causes are: open or shorted injector control circuit, open power supply, open injector, or failed driver in PCM.
  3. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, start engine. Wiggle wiring harness and connectors from injector to PCM. If engine misses or stalls when wiring harness and connectors are wiggled, repair area where wiggling caused problem to appear. If engine does not miss or stall when wiring harness and connectors are wiggled, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.

INJECTOR #2 CONTROL CIRCUIT (DTC 27)

Note. When testing on junction block terminals, it may be necessary to unbolt junction block from vehicle to identify wire color for terminal being tested. see scheme 8 For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2.

  1. Turn ignition off. Disconnect junction block connectors No. 1 and 3. Junction block is located next to right shock tower. see scheme 8 Go to next step.
  2. Using an external ohmmeter, check resistance between junction block No. 1 (Tan wire) and junction block No. 3 (Dark Green/Orange wire). If resistance is not 10-15 ohms, go to TEST TC-30B. If resistance is 10-15 ohms, go to next step.
  3. Move external ohmmeter lead from junction block No. 3 (Dark Green/Orange wire) to chassis ground. If resistance is less than 5 ohms, repair short to ground in Tan wire. If resistance is more than 5 ohms, go to next step.
  4. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on junction block connector No. 3 (Dark Green/Orange wire). If voltage is less than 10 volts, repair open Dark Green/Orange wire. If voltage is more than 10 volts, go to next step.
  5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 15 (Tan wire). If resistance is less than 5 ohms, repair short to ground in Tan wire. If resistance is more than 5 ohms, go to next step.
  6. Using an external ohmmeter, check resistance of Tan wire between junction block connector No. 1 and PCM connector terminal No. 15. If resistance is more than 5 ohms, repair open Tan wire. If resistance is less than 5 ohms, replace PCM.

INJECTOR #3 CONTROL CIRCUIT (DTC 27)

Note. When testing on junction block terminals, it may be necessary to unbolt junction block from vehicle to identify wire color for terminal being tested. see scheme 8 For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2.

  1. Turn ignition off. Disconnect junction block connectors No. 1 and 3. Junction block is located next to right shock tower. see scheme 8 Go to next step.
  2. Using an external ohmmeter, check resistance between junction block No. 1 (Yellow/White wire) and junction block No. 3 (Dark Green/Orange wire). If resistance is not 10-15 ohms, go to TEST TC-31B. If resistance is 10-15 ohms, go to next step.
  3. Move external ohmmeter lead from junction block No. 3 (Dark Green/Orange wire) to chassis ground. If resistance is less than 5 ohms, repair short to ground in Yellow/White wire. If resistance is more than 5 ohms, go to next step.
  4. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on junction block connector No. 3 (Dark Green/Orange wire). If voltage is less than 10 volts, repair open Dark Green/Orange wire. If voltage is more than 10 volts, go to next step.
  5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 14 (Yellow/White wire). If resistance is less than 5 ohms, repair short to ground in Yellow/White wire. If resistance is more than 5 ohms, go to next step.
  6. Using an external ohmmeter, check resistance of Yellow/White wire between junction block connector No. 1 and PCM connector terminal No. 14. If resistance is more than 5 ohms, repair open Yellow/White wire. If resistance is less than 5 ohms, replace PCM.

INJECTOR #4 CONTROL CIRCUIT (DTC 27)

Note. When testing on junction block terminals, it may be necessary to unbolt junction block from vehicle to identify wire color for terminal being tested. see scheme 8 For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2.

  1. Turn ignition off. Disconnect junction block connectors No. 1 and 3. Junction block is located next to right shock tower. see scheme 8 Go to next step.
  2. Using an external ohmmeter, check resistance between junction block No. 1 (Light Blue/Brown wire) and junction block No. 3 (Dark Green/Orange wire). If resistance is not 10-15 ohms, go to TEST TC-32B. If resistance is 10-15 ohms, go to next step.
  3. Move external ohmmeter lead from junction block No. 3 (Dark Green/Orange wire) to chassis ground. If resistance is less than 5 ohms, repair short to ground in Light Blue/Brown wire. If resistance is more than 5 ohms, go to next step.
  4. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on junction block connector No. 3 (Dark Green/Orange wire). If voltage is less than 10 volts, repair open Dark Green/Orange wire. If voltage is more than 10 volts, go to next step.
  5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 13 (Light Blue/Brown wire). If resistance is less than 5 ohms, repair short to ground in Light Blue/Brown wire. If resistance is more than 5 ohms, go to next step.
  6. Using an external ohmmeter, check resistance of Light Blue/Brown wire between junction block connector No. 1 and PCM connector terminal No. 13. If resistance is more than 5 ohms, repair open Light Blue/Brown wire. If resistance is less than 5 ohms, replace PCM.

INJECTOR #5 CONTROL CIRCUIT (DTC 27)

Note. When testing on junction block terminals, it may be necessary to unbolt junction block from vehicle to identify wire color for terminal being tested. see scheme 8 For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2.

  1. Turn ignition off. Disconnect junction block connectors No. 1 and 3. Junction block is located next to right shock tower. see scheme 8 Go to next step.
  2. Using an external ohmmeter, check resistance between junction block No. 1 (Brown/Red wire) and junction block No. 3 (Dark Green/Orange wire). If resistance is not 10-15 ohms, go to TEST TC-33B. If resistance is 10-15 ohms, go to next step.
  3. Move external ohmmeter lead from junction block No. 3 (Dark Green/Orange wire) to chassis ground. If resistance is less than 5 ohms, repair short to ground in Brown/Red wire. If resistance is more than 5 ohms, go to next step.
  4. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on junction block connector No. 3 (Dark Green/Orange wire). If voltage is less than 10 volts, repair open Dark Green/Orange wire. If voltage is more than 10 volts, go to next step.
  5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 38 (Brown/Red wire). If resistance is less than 5 ohms, repair short to ground in Brown/Red wire. If resistance is more than 5 ohms, go to next step.
  6. Using an external ohmmeter, check resistance of Brown/Red wire between junction block connector No. 1 and PCM connector terminal No. 38. If resistance is more than 5 ohms, repair open Brown/Red wire. If resistance is less than 5 ohms, replace PCM.

INJECTOR #6 CONTROL CIRCUIT (DTC 27)

Note. When testing on junction block terminals, it may be necessary to unbolt junction block from vehicle to identify wire color for terminal being tested. see scheme 8 For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2.

  1. Turn ignition off. Disconnect junction block connectors No. 1 and 3. Junction block is located next to right shock tower. see scheme 8 Go to next step.
  2. Using an external ohmmeter, check resistance between junction block No. 1 (Brown/Black wire) and junction block No. 3 (Dark Green/Orange wire). If resistance is not 10-15 ohms, go to TEST TC-34B. If resistance is 10-15 ohms, go to next step.
  3. Move external ohmmeter lead from junction block No. 3 (Dark Green/Orange wire) to chassis ground. If resistance is less than 5 ohms, repair short to ground in Brown/Black wire. If resistance is more than 5 ohms, go to next step.
  4. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on junction block connector No. 3 (Dark Green/Orange wire). If voltage is less than 10 volts, repair open Dark Green/Orange wire. If voltage is more than 10 volts, go to next step.
  5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 58 (Brown/Black wire). If resistance is less than 5 ohms, repair short to ground in Brown/Black wire. If resistance is more than 5 ohms, go to next step.
  6. Using an external ohmmeter, check resistance of Brown/Black wire between junction block connector No. 1 and PCM connector terminal No. 58. If resistance is more than 5 ohms, repair open Brown/Black wire. If resistance is less than 5 ohms, replace PCM.

IGNITION COIL PRIMARY CIRCUITS (DTC 43)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, erase trouble codes. Attempt to start engine. If necessary, crank engine for at least 10 seconds. Read trouble codes. If scan tool displays any IGNITION COIL PRIMARY CIRCUIT trouble codes, see IGNITION COIL PRIMARY CIRCUIT CODES table and perform corresponding test. If scan tool does not display any injector control circuit codes, go to next step. IGNITION COIL PRIMARY CIRCUIT CODES Scan Tool Display Test No. IGNITION COIL #1 PRIMARY CIRCUIT «TEST TC-35B»(ref-11020-S34524527492000111000000) IGNITION COIL #2 PRIMARY CIRCUIT «TEST TC-36A»(ref-11020-S29752892602000111000000) IGNITION COIL #3 PRIMARY CIRCUIT «TEST TC-37A»(ref-11020-S12402360252000111000000)
  2. At this time, the condition required to set trouble code is not present. IGNITION COIL PRIMARY CIRCUIT trouble code sets when Powertrain Control Module (PCM) does not see peak current reached. Possible causes are: open or shorted ignition coil driver control circuit, open ignition coil primary circuit, open power supply, or failed PCM. Go to next step.
  3. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, start engine. Wiggle wiring harness from Direct Ignition System (DIS) coil to PCM. If engine misses or stalls, repair wiring where wiggling caused problem to appear. If engine does not miss or stall, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.

IGNITION COIL #2 PRIMARY CIRCUIT (DTC 43)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. If scan tool displays IGNITION COIL #2 PRIMARY CIRCUIT in «TEST TC-35A»(ref-11020-S12146495162000111000000) and ASD RELAY CONTROL CIRCUIT trouble code is also present, go to «TEST TC-44A»(ref-11020-S18558958442000111000000) . If ASD RELAY CONTROL CIRCUIT trouble code is not present, go to next step.
  2. Turn ignition off. Disconnect and inspect ignition coil connector. If any terminal is damaged, pushed out or miswired, repair as necessary. If connector is okay, go to next step.
  3. Turn ignition on. Using scan tool, actuate ignition coil No. 2. Using scan tool in voltmeter mode, check voltage on ignition coil connector terminal No. 4 (Dark Green/Orange wire). If voltage is less than 10 volts, go to «TEST TC-37B»(ref-11020-S14805407502000111000000) . If voltage is more than 10 volts, go to next step.
  4. Using an external ohmmeter, check resistance between ignition coil terminals No. 3 (White wire) and No. 4 (Dark Green/Orange wire). If resistance is more than 2 ohms, replace ignition coil. If resistance is less than 2 ohms, go to next step.
  5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 17 (White wire). If resistance is less than 5 ohms, repair short to ground in White wire. If resistance is more than 5 ohms, go to next step.
  6. Using an external ohmmeter, check resistance of White wire between PCM connector terminal No. 17 and ignition coil connector terminal No. 3. If resistance is more than 5 ohms, repair open White wire. If resistance is less than 5 ohms, replace PCM.

IGNITION COIL #3 PRIMARY CIRCUIT (DTC 43)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. If scan tool displays IGNITION COIL #3 PRIMARY CIRCUIT in «TEST TC-35A»(ref-11020-S12146495162000111000000) and ASD RELAY CONTROL CIRCUIT trouble code is also present, go to «TEST TC-44A»(ref-11020-S18558958442000111000000) . If ASD RELAY CONTROL CIRCUIT trouble code is not present, go to next step.
  2. Turn ignition off. Disconnect and inspect ignition coil connector. If any terminal is damaged, pushed out or miswired, repair as necessary. If connector is okay, go to next step.
  3. Turn ignition on. Using scan tool, actuate ignition coil No. 3. Using scan tool in voltmeter mode, check voltage on ignition coil connector terminal No. 4 (Dark Green/Orange wire). If voltage is less than 10 volts, go to TEST TC-37B. If voltage is more than 10 volts, go to next step.
  4. Using an external ohmmeter, check resistance between ignition coil terminals No. 1 (Red wire) and No. 4 (Dark Green/Orange wire). If resistance is more than 2 ohms, replace ignition coil. If resistance is less than 2 ohms, go to next step.
  5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 18 (Red/Yellow wire). If resistance is less than 5 ohms, repair short to ground in Red/Yellow wire. If resistance is more than 5 ohms, go to next step.
  6. Using an external ohmmeter, check resistance of Red/Yellow wire between PCM connector terminal No. 18 and ignition coil connector terminal No. 1. If resistance is more than 5 ohms, repair open Red/Yellow wire. If resistance is less than 5 ohms, replace PCM.

EGR SYSTEM FAILURE (DTC 32)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Start engine. Allow engine to idle for 2 minutes. Disconnect EGR solenoid electrical connector. Disconnect EGR solenoid vacuum supply hose. Connect a vacuum gauge to disconnected hose. If vacuum gauge reads less than 10 in. Hg, repair vacuum supply to EGR solenoid. If vacuum gauge reads more than 10 in. Hg, Go to next step.
  2. Reconnect vacuum hose to EGR solenoid. Disconnect vacuum hose from EGR valve. Connect a vacuum gauge to disconnected hose. While observing vacuum gauge, momentarily increase engine speed to more than 2000 RPM. If vacuum gauge does not read 5 in. Hg, replace EGR valve. If vacuum gauge reads 5 in. Hg, go to next step.
  3. Remove vacuum gauge from disconnected hose. Connect a vacuum pump to EGR valve nipple. Start engine and let idle. Slowly apply vacuum to EGR valve while observing engine idle. If engine idles rough or stalls as vacuum is applied, go to step 5). If engine does not idle rough or stall as vacuum is applied, go to next step.
  4. Remove EGR valve and inspect manifold and tube for restrictions. Repair as required. If no restrictions are found, replace EGR valve.
  5. If engine idles rough or stalls when vacuum is applied to EGR valve in step 3), turn ignition off. At this time, the condition required to set trouble code is not present. EGR SYSTEM FAILURE trouble code occurs when Powertrain Control Module (PCM) performs a test of the EGR system and monitors the oxygen sensor signal for a change. Possible causes are: EGR valve not opening, EGR transfer tube blocked, EGR passages in manifold blocked, failed EGR valve, failed EGR solenoid or failed PCM. Go to next step.
  6. Inspect hoses and connectors. Repair as required. If hoses and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.

EGR SOLENOID CONTROL CIRCUIT (DTC 32)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, erase trouble codes. Actuate EGR solenoid. Read trouble codes. If scan tool displays EGR SOLENOID CONTROL CIRCUIT, go to step 4). If scan tool does not display EGR SOLENOID CONTROL CIRCUIT, go to next step.
  2. At this time, the condition required to set trouble code is not present. EGR SOLENOID CIRCUIT trouble code is set when solenoid is not in its proper state when monitored by the Powertrain Control Module (PCM). Possible causes are: open or shorted solenoid, open power supply circuit, open or shorted control circuit, or failed PCM.
  3. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, use scan tool to read trouble codes. With actuator test still running, wiggle wiring harness from EGR solenoid to PCM. If EGR SOLENOID CIRCUIT trouble code returns, repair wiring where wiggling caused problem to return. If EGR SOLENOID CIRCUIT trouble code does not return, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  4. If scan tool displays EGR SOLENOID CONTROL CIRCUIT in step 1), turn ignition off. Disconnect EGR solenoid connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on EGR solenoid connector terminal No. 1 (Light Green/Black wire). If voltage is less than 10 volts, go to TEST TC-39B. If voltage is more than 10 volts, go to next step.
  5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using an external ohmmeter, check resistance of Gray/Yellow wire between PCM connector terminal No. 35 and EGR solenoid connector terminal No. 2. If resistance is more than 5 ohms, repair open Gray/Yellow wire. If resistance is less than 5 ohms, go to next step.
  6. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 35 (Gray/Yellow wire). If resistance is less than 5 ohms, repair short to ground in Gray/Yellow wire. If resistance is more than 5 ohms, go to next step.
  7. Reconnect EGR solenoid connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM connector terminal No. 35 (Gray/Yellow wire). If voltage is less than 10 volts, replace EGR solenoid. If voltage is more than 10 volts, replace PCM.

EVAP SOLENOID CONTROL CIRCUIT (DTC 31)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, erase trouble codes. Actuate EVAP solenoid. Read trouble codes. If scan tool displays EVAP SOLENOID CIRCUIT, go to step 4). If scan tool does not display EVAP SOLENOID CIRCUIT, go to next step.
  2. At this time, the condition required to set trouble code is not present. EVAP SOLENOID CIRCUIT trouble code sets if solenoid is not in its proper state when monitored by Powertrain Control Module (PCM). Possible causes are: open or shorted EVAP control solenoid circuit, open or shorted EVAP solenoid, failed PCM, or open ignition 12-volt feed to solenoid. Go to next step.
  3. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, Using scan tool, read trouble codes. With actuator test still running, wiggle wiring harness from solenoid to PCM. If EVAP SOLENOID CIRCUIT trouble code returns, repair wiring where wiggling caused problem to appear. If EVAP SOLENOID CIRCUIT trouble code does not return, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  4. If scan tool displays EVAP SOLENOID CIRCUIT in step 1), turn ignition off. Disconnect EVAP solenoid connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on EVAP solenoid connector terminal No. 2 (Light Green/Black wire). If voltage is less than 10 volts, go to TEST TC-40B. If voltage is more than 10 volts, go to next step.
  5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using an external ohmmeter, check resistance of Pink/Black wire between PCM connector terminal No. 52 and EVAP solenoid connector terminal No. 1. If resistance is more than 5 ohms, repair open Pink/Black wire. If resistance is less than 5 ohms, go to next step.
  6. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 52 (Pink/Black wire). If resistance is less than 5 ohms, repair short to ground in Pink/Black wire. If resistance is more than 5 ohms, go to next step.
  7. Reconnect EVAP solenoid connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM connector terminal No. 52 (Pink/Black wire). If voltage is less than 10 volts, replace EVAP solenoid. If voltage is more than 10 volts, replace PCM.

MANIFOLD TUNE VALVE SOLENOID CIRCUIT (DTC 65)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, erase trouble codes. Actuate Manifold Tuning Valve (MTV) solenoid. Read trouble codes. If scan tool displays MANIFOLD TUNE VALVE SOLENOID CIRCUIT, go to step 4). If scan tool does not display MANIFOLD TUNE VALVE SOLENOID CIRCUIT, go to next step.
  2. At this time, the condition required to set trouble code is not present. MANIFOLD TUNE VALVE SOLENOID CONTROL CIRCUIT trouble code sets if the solenoid is not in its proper state when monitored by Powertrain Control Module (PCM). Possible causes are: open or shorted control circuit, open ignition 12-volt feed to solenoid, open or shorted solenoid, or failed PCM. Go to next step.
  3. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, with actuator test still running, erase trouble codes. Wiggle wiring harness from solenoid to PCM. If MANIFOLD TUNE VALVE SOLENOID CIRCUIT trouble code returns, repair wiring where wiggling caused problem to appear. If MANIFOLD TUNE VALVE SOLENOID CIRCUIT trouble code does not return, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  4. If scan tool displays MANIFOLD TUNE VALVE SOLENOID CIRCUIT in step 1), turn ignition off. Disconnect MTV solenoid connector. MTV solenoid is located on right front strut tower. Turn ignition on. Using scan tool in voltmeter mode, check voltage on MTV solenoid connector terminal No. 2 (Light Green/Black wire). If voltage is less than 10 volts, go to TEST TC-41B. If voltage is more than 10 volts, go to next step.
  5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using an external ohmmeter, check resistance of Violet/White between MTV solenoid connector terminal No. 1 and PCM connector terminal No. 36. If resistance is more than 5 ohms, repair open Violet/White wire If resistance is less than 5 ohms, go to next step.
  6. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 36 (Violet/White wire). If resistance is less than 5 ohms, repair short to ground in Violet/White wire. If resistance is more than 5 ohms, go to next step.
  7. Reconnect MTV solenoid connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM connector terminal No. 36 (Violet/White wire). If voltage is less than 10 volts, replace MTV solenoid. If voltage is more than 10 volts, replace PCM.

LOW SPEED FAN CTRL RELAY CIRCUIT (DTC 35)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, erase trouble codes. Actuate low speed radiator fan relay. If a clicking sound cannot be heard when relay is actuated, go to step 4). If a clicking sound can be heard when relay is actuated, go to next step.
  2. At this time, the condition required to set trouble code is not present. LOW SPEED FAN CTRL RELAY CIRCUIT trouble code sets if the relay control circuit does not reflect the proper state (high or low) requested by Powertrain Control Module (PCM). Possible causes are: open or shorted coil in relay, control circuit wire open or shorted, open or shorted ignition power feed to relay, or failed control circuit driver in PCM. Go to next step.
  3. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, ensure scan tool is still actuating low speed radiator fan relay. Wiggle harness from relay to PCM. If wiggling interrupts clicking, repair wiring where wiggling caused clicking to interrupt. If clicking is not interrupted, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000). Test is complete.
  4. If a clicking sound cannot be heard when relay is actuated in step 1), remove low speed radiator fan relay. Low speed radiator fan relay is located in power distribution center, near left shock tower. Using scan tool in voltmeter mode, check voltage on low speed radiator fan relay connector terminal "A" (Light Green/Black wire). If voltage is less than 10 volts, repair open Light Green/Black wire. If voltage is more than 10 volts, go to next step.
  5. Using an external ohmmeter, check resistance between low speed radiator fan relay terminals No. 85 and No. 86. (Scheme 8) If resistance is more than 100 ohms, replace low speed radiator fan relay. If resistance is less than 100 ohms, go to next step.
  6. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using scan tool in ohmmeter mode, check resistance of low speed radiator fan relay connector terminal "C" (White wire). If resistance is less than 5 ohms, repair short to ground in White wire. If resistance is more than 5 ohms, go to next step.
  7. Using an external ohmmeter, check resistance of White wire between low speed radiator fan relay connector terminal "C" and PCM connector terminal No. 32. If resistance is more than 5 ohms, repair open White wire. If resistance is less than 5 ohms, replace PCM.

Testing Relay (Typical). Scheme 8

Scheme 8: Testing Relay (Typical)
Scheme 8: Testing Relay (Typical)

HIGH SPEED FAN CTRL RELAY CIRCUIT (DTC 35)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, erase trouble codes. Actuate high speed radiator fan relay. If a clicking sound cannot be heard when relay is actuated, go to step 4). If a clicking sound can be heard when relay is actuated, go to next step.
  2. At this time, the condition required to set trouble code is not present. HIGH SPEED FAN CTRL RELAY CIRCUIT trouble code sets if the relay control circuit does not reflect the proper state (high or low) requested by Powertrain Control Module (PCM). Possible causes are: open or shorted coil in relay, control circuit wire open or shorted, open or shorted ignition power feed to relay, or failed control circuit driver in PCM. Go to next step.
  3. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, ensure scan tool is still actuating high speed radiator fan relay. Wiggle harness from relay to PCM. If wiggling interrupts clicking, repair wiring where wiggling caused clicking to interrupt. If clicking is not interrupted, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000). Test is complete.
  4. If a clicking sound cannot be heard when relay is actuated in step 1), remove high speed radiator fan relay. High speed radiator fan relay is located in power distribution center, near left shock tower. Using scan tool in voltmeter mode, check voltage on high speed radiator fan relay connector terminal "A" (Light Green/Black wire). If voltage is less than 10 volts, repair open Light Green/Black wire. If voltage is more than 10 volts, go to next step.
  5. Using an external ohmmeter, check resistance between high speed radiator fan relay terminals No. 85 and No. 86. (Scheme 8) If resistance is more than 100 ohms, replace high speed radiator fan relay. If resistance is less than 100 ohms, go to next step.
  6. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using scan tool in ohmmeter mode, check resistance of high speed radiator fan relay connector terminal "C" (Dark Blue/Pink wire). If resistance is less than 5 ohms, repair short to ground in Dark Blue/Pink wire. If resistance is more than 5 ohms, go to next step.
  7. Using an external ohmmeter, check resistance of Dark Blue/Pink wire between high speed radiator fan relay connector terminal "C" and PCM connector terminal No. 31. If resistance is more than 5 ohms, repair open Dark Blue/Pink wire. If resistance is less than 5 ohms, replace PCM.

AUTO SHUTDOWN RELAY CONTROL CIRCUIT (DTC 42)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

  1. Using scan tool, erase trouble codes. Actuate Auto Shutdown (ASD) relay. If ASD relay does not make a clicking sound, go to step 4). If ASD relay makes a clicking sound, go to next step.
  2. At this time, the condition required to set trouble code is not present. AUTO SHUTDOWN RELAY CONTROL CIRCUIT trouble code sets if ASD relay control circuit is not in its proper state when checked by Powertrain Control Module (PCM) during cranking. Possible causes are: open or short in ASD relay control circuit, open or short control circuit wire, open or shorted ignition power feed to relays, or failed control circuit driver in PCM. Go to next step.
  3. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, ensure scan tool is still actuating ASD relay. Start engine. Wiggle wiring from ASD relay to PCM. If engine stalls, repair wiring where wiggling caused engine to stall. If engine does not stall, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete
  4. If ASD relay does not make a clicking sound in step 1), remove ASD relay. ASD relay is located in power distribution center, near left shock tower. Using scan tool in voltmeter mode, check voltage on ASD relay connector terminal "A" (Dark Blue/White wire). If voltage is less than 10 volts, repair open Dark Blue/White wire. If voltage is more than 10 volts, go to next step.
  5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using scan tool in ohmmeter mode, check resistance of ASD relay connector terminal "C" (Dark Blue/Yellow wire). If resistance is less than 5 ohms, repair short to ground in Dark Blue/Yellow wire. If resistance is more than 5 ohms, go to next step.
  6. Using an external ohmmeter, check resistance of (Dark Blue/Yellow wire) between ASD relay connector terminal "C" and PCM connector terminal No. 51. If resistance is more than 5 ohms, repair open Dark Blue/Yellow wire. If resistance is less than 5 ohms, replace PCM.

A/C CLUTCH RELAY CIRCUIT (DTC 33)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

Scheme 9

Scheme 9: A/C CLUTCH RELAY CIRCUIT (DTC 33)
Scheme 9: A/C CLUTCH RELAY CIRCUIT (DTC 33)

Scheme 10

Scheme 10
Scheme 10

Scheme 11

Scheme 11
Scheme 11

Scheme 12

Scheme 12
Scheme 12
  1. With the DRB, erase trouble codes.
  2. With the DRB, actuate the A/C clutch relay. (Scheme 9) If the A/C clutch relay is not clicking, go to next step. If the A/C clutch relay is clicking, go to step 7.
  3. Disconnect the A/C clutch relay. With DRB in voltmeter mode, probe the fused ignition switch output circuit. (Scheme 10) If the voltage is not above 10 volts, repair the open fused ignition switch output circuit. If the voltage is above 10 volts, go to next step.
  4. Using an ohmmeter, measure the resistance across the A/C clutch relay terminals. (Scheme 11) If the resistance is not below 100 ohms, replace the A/C clutch relay. If the resistance is below 100 ohms, go to next step.
  5. With the key off, disconnect the PCM. (Scheme 5) With the DRB in ohmmeter mode, probe the A/C clutch control circuit. (Scheme 10) If the resistance is below 5 ohms, repair the A/C clutch relay control circuit for a short to ground. If the resistance is not below 5 ohms, go to next step.
  6. Using an ohmmeter, test the A/C clutch relay control circuit for resistance. (Scheme 12) If the resistance is below 5 ohms, repair open in A/C clutch relay control circuit. If the resistance is not below 5 ohms, replace PCM.
  7. The condition required to set the trouble code is not present. Using the wiring diagram as a guide, inspect the wiring and connectors. See AIR CONDITIONING in appropriate SYSTEM WIRING DIAGRAMS article. If any problems are found, repair as necessary. If no problems were found, go to next step.
  8. While the DRB is still activating the A/C clutch relay, wiggle the wiring harness from the relay to the PCM. If the wiggling interrupted the clicking, repair as necessary where wiggling caused the clicking to be interrupted. If the wiggling did not interrupt the clicking, refer to Inactive Trouble Code Information. See «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000).

NO CCD BUS MESSAGES FROM TCM (DTC 66)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

Note. Chrysler Collision Detection (CCD) bus test is automatic.

  1. Turn ignition on. Using scan tool, select TRANSMISSION and then 42LE. If scan tool does not display BUS OPERATIONAL, see appropriate «TESTS W/CODES - BODY CONTROL COMPUTER»(ref-11041) article in ENGINE PERFORMANCE. If scan tool displays BUS OPERATIONAL, go to next step.
  2. If scan tool displays NO RESPONSE, see the TRANSMISSION SERVICING article. If scan tool does not display NO RESPONSE, go to next step.
  3. Using scan tool, select ENGINE and erase trouble codes. Start engine. Allow engine to idle for one minute. Using scan tool, read trouble codes. If scan tool displays NO CCD MESSAGES RECEIVED, go to step 5). If scan tool does not display NO CCD MESSAGES RECEIVED, go to next step.
  4. At this time, the condition required to set trouble code is not present. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  5. Turn ignition off. Disconnect Powertrain Control Module connector. PCM is located under air cleaner. Disconnect Transmission Control Module (TCM) connector. TCM is located between left front fender and battery. Go to next step.
  6. Using an external ohmmeter, check resistance of White/Black wire between PCM connector terminal No. 46 and TCM connector terminal No. 4. If resistance is more than 5 ohms, repair open White/Black wire. If resistance is less than 5 ohms, go to next step.
  7. Using an external ohmmeter, check resistance of Violet/Brown wire between PCM connector terminal No. 26 and TCM connector terminal No. 43. If resistance is more than 5 ohms, repair open Violet/Brown wire. If resistance is less than 5 ohms, replace PCM.

NO CCD MESSAGES FROM BCM (DTC 66)

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2 .

Note. Chrysler Collision Detection (CCD) bus test is automatic.

  1. Turn ignition on. Using scan tool, select BODY SYSTEM and then BODY CONTROLLER. If scan tool does not display BUS OPERATIONAL, see «TESTS W/CODES - BODY CONTROL COMPUTER»(ref-11041) article in ENGINE PERFORMANCE. If scan tool displays BUS OPERATIONAL, go to next step.
  2. If scan tool displays NO RESPONSE, see appropriate «TESTS W/CODES - BODY CONTROL COMPUTER»(ref-11041) article in ENGINE PERFORMANCE. If scan tool does not display NO RESPONSE, go to next step.
  3. Using scan tool, select ENGINE and erase trouble codes. Start engine. Allow engine to idle for one minute. Read trouble codes. If scan tool displays NO CCD MESSAGES FROM BCM, go to step 6). If scan tool does not display NO CCD MESSAGES FROM BCM, go to next step.
  4. At this time, the condition required to set trouble code is not present. NO CCD MESSAGES FROM BCM trouble code sets when Powertrain Control Module (PCM) does not receive any messages from BCM across CCD bus for 30 seconds. Possible causes are: CCD bus failure, open CCD (+) circuit, open CCD bus (-) circuit, no power to body control module, failed PCM, or failed BCM. Go to next step.
  5. Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, see «INACTIVE TROUBLE CODE CONDITION»(ref-11020-S28818688592000111000000) . Test is complete.
  6. If scan tool displays NO CCD MESSAGES FROM BCM in step 3), turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Disconnect Body Control Module (BCM) Bone connector. BCM is located behind right kick panel. Go to next step.
  7. Using an external ohmmeter, check resistance of White/Black wire between PCM connector terminal No. 46 and BCM Bone connector terminal No. 7. If resistance is more than 5 ohms, repair open White/Black wire. If resistance is less than 5 ohms, go to next step.
  8. Using an external ohmmeter, check resistance of Violet/Brown wire between PCM connector terminal No. 26 and BCM Bone connector terminal No. 8. If resistance is more than 5 ohms, repair open Violet/Brown wire. If resistance is less than 5 ohms, replace PCM.

No Trouble Code Complete Test

Check Technical Service Bulletins (TSBs) for any pertinent information. If a TSB exists, perform corrective action. If a TSB does not exist or if driveability problem still exists, perform tests NTC-2A through NTC-16A in sequence until driveability problem is found. See NO TROUBLE CODE TEST MENU table.

ApplicationTest
Checking Secondary Ignition & TimingTEST NTC-2A
Checking Fuel PressureTEST NTC-3A
Checking Coolant Sensor Calibration & Radiator Fan OperationTEST NTC-4A
Checking TPS CalibrationTEST NTC-5A
Checking MAP Sensor CalibrationTEST NTC-6A
Checking Oxygen Sensor (O2S) SwitchingTEST NTC-7A
Checking Oxygen Sensor (O2S) HeaterTEST NTC-8A
Checking Idle Air Control MotorTEST NTC-9A
Checking Solenoid OperationsTEST NTC-10A
Checking Manual Valve Lever Position Switch (MVLPS)TEST NTC-11A
Checking PCM Ground & Power CircuitsTEST NTC-12A
Checking EGR SystemTEST NTC-13A
Checking Engine VacuumTEST NTC-14A
Checking Minimum Idle AirflowTEST NTC-15A
Performing No Trouble Code Mechanical TestTEST NTC-16A

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 the cause of a vehicle's driveability problem, perform associated test(s) individually. Return to NO TROUBLE CODE TEST MENU table if driveability problem still exists, or perform NO TROUBLE CODE COMPLETE TEST.

No Trouble Code Quick Symptom Test

Symptom checks cannot be used properly unless the driveability problem characteristic actually happens while the vehicle is being tested. To reduce diagnostic time, ensure that TEST TC-1A is reviewed before attempting to diagnose a symptom.

Select the symptom that most accurately describes the vehicle's driveability problem and then perform the test that pertains to this symptom. Perform each test in sequence until problem is found. See NO TROUBLE CODE QUICK SYMPTOM TEST MENU table.

ApplicationTest
Hard StartNTC-2A , 3A - 7A , 9A , 12A , 15A - 16A
Start & StallNTC-2A , 3A - 6A , 9A , 12A , 16A
Hesitation/Sag/Stumble(1) *
SurgeNTC-2A , 3A - 7A , 9A , 12A , 13A , 16A
Lack Of Power/SluggishNTC-2A , 3A - 7A , 9A , 12A , 14A , 16A
Spark Knock/DetonationNTC-2A , 3A - 7A , 9A - 10A , 12A - 13A , 16A
Cuts Out/MissesNTC-2A , 3A , 7A , 10A , 12A , 14A , 16A
Backfire/Pop-BackNTC-2A , 3A , 6A - 7A , 12A , 14A , 16A
Runs Rough/Unstable/Erratic Idle(1) *
Poor Fuel Economy(1) *
(1) Perform tests NTC-2A through NTC-16A in sequence. See NO TROUBLE CODE TEST MENU table.
(1)Perform tests NTC-2A through NTC-16A in sequence. See NO TROUBLE CODE TEST MENU table.

NO TROUBLE CODE QUICK SYMPTOM TEST MENU

PERFORMING NTC MECHANICAL TEST

Note. If coming to this test from oxygen sensor test and rich or lean condition is not corrected after checking items listed below, replace Powertrain Control Module (PCM). PCM is located under air cleaner.

At this point in diagnostic test procedure, all engine 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 if any Technical Service Bulletins (TSBs) apply to vehicle.
  2. Check engine vacuum. It must be at least 13 in. Hg in Neutral.
  3. Check valve timing.
  4. Check engine compression.
  5. Check for exhaust system restriction.
  6. Ensure PCV system is functioning properly.
  7. Check camshaft and crankshaft sprockets.
  8. Check torque converter stall speed.
  9. Check power booster for internal vacuum leak.
  10. Check for fuel contamination.
  11. Ensure injector control wire is connected to correct fuel injector and injector is not plugged or restricted.

INSPECTING FUEL SYSTEM

Note. After each repair, perform TEST VER-1 .

WARNINGHigh fuel pressure may be present in fuel lines. Open fuel system with caution. See FUEL PRESSURE RELEASE .
  1. Ensure throttle cables are not holding throttle open. If throttle is held open, repair as required. If throttle is okay, go to next step.
  2. Using DRB, read Throttle Position Sensor (TPS) voltage. If voltage is more than 1.5 volts, go to step 3). If voltage is less than 1.5 volts, use DRB to actuate fuel system. Listen for fuel pump operation at fuel tank. If fuel pump operation cannot be heard, go to «TEST NS-5A»(ref-11020-S40917865622000111000000) . If fuel pump operation can be heard, go to step 4).
  3. If voltage is more than 1.5 volts in step 2), disconnect TPS connector. Inspect terminals. Repair as required. If terminals are okay, replace TPS.
  4. If fuel pump operation could be heard in step 2), turn ignition off. Ensure fuel tank is at least 1/4" full. Release fuel pressure. Install a fuel pressure gauge in fuel supply line. Turn ignition on. Go to next step.
  5. Using DRB, actuate fuel system. Read fuel pressure gauge reading. If fuel pressure is more than 60 psi (3.3L) or 53 psi (3.5L), go to «TEST NS-4B»(ref-11020-S05599324122000111000000) . If fuel pressure is less than 60 psi (3.3L) or 53 psi (3.5L), go to next step.
  6. If fuel pressure is less than 50 psi (3.3L) or 43 psi (3.5L), go to «TEST NS-4A»(ref-11020-S31627614552000111000000) . If fuel pressure is more than 50 psi (3.3L) or 43 psi (3.5L) and vehicle initially started and stalled repeatedly, go to TEST NS-7A. If fuel pressure is more than 50 psi (3.3L) or 43 psi (3.5L) and vehicle initially did not stall repeatedly, go to TEST NS-3A.

INSPECTING MECHANICAL SYSTEM

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-1 .

  1. Disconnect Manifold Absolute Pressure (MAP) sensor connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on MAP sensor connector terminal No. 3 (Violet/White wire). If voltage is less than 4.5 volts, repair open Violet/White wire. If voltage is more than 4.5 volts, go to next step.
  2. Reconnect MAP sensor connector. Remove all spark plugs. Inspect spark plug tips for wet fuel. If spark plug tips are wet, clean spark plugs. If spark plug tips are not wet, reinstall spark plugs. Go to next step.
  3. Inspect spark plug cables for correct placement. Reposition cables as required. If spark plug cables are installed correctly, go to next step.
  4. Using scan tool, read total spark advance while cranking engine. If spark advance is not 0-25 degrees BTDC, replace Powertrain Control Module (PCM). PCM is located under air cleaner. If spark advance is 0-25 degrees BTDC, go to next step.
  5. Turn ignition off. Check valve timing. Correct valve timing as required. If valve timing is okay, check engine compression. Repair as required. If engine compression is okay, replace MAP sensor.

INSPECTING FUEL PUMP

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-1 .

  1. Using scan tool, stop actuation test. Actuate Auto Shutdown (ASD) relay. Touch fuel pump relay. If fuel pump relay does not pulsate when actuated, go to TEST NS-5B. If fuel pump relay pulsates when actuated, go to next step.
  2. Turn ignition off. Disconnect fuel pump relay. Using scan tool in voltmeter mode, check voltage on fuel pump relay connector terminal "B" (Red wire). If voltage is less than 10 volts, repair open Red wire. If voltage is more than 10 volts, go to next step.
  3. Reconnect fuel pump relay. Disconnect fuel pump connector. Ensure fuel pump connector has clean and tight connections. Turn ignition on. Go to next step.
  4. Using scan tool, actuate fuel system. Using scan tool in voltmeter mode, check voltage on fuel pump relay connector terminal No. 1 (Dark Green/Black wire). If voltage is less than 10 volts, go to step 6). If voltage is more than 10 volts, go to next step.
  5. Stop actuation test. Using scan tool in ohmmeter mode, check resistance of fuel pump connector terminal No. 5 (Black wire). If resistance is more than 5 ohms, repair open Black wire. If resistance is less than 5 ohms, replace fuel pump.
  6. If voltage is less than 10 volts in step 4), turn ignition off. Disconnect fuel pump relay. Connect a jumper wire between fuel pump relay connector terminal "D" (Dark Green/Black wire) and chassis ground. Go to next step.
  7. Using scan tool in ohmmeter mode, check resistance of fuel pump connector terminal No. 1 (Dark Green/Black wire). If resistance is less than 5 ohms, replace fuel pump relay. If resistance is more than 5 ohms, repair open Dark Green/Black wire.

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-1 .

  1. Turn ignition off. Disconnect fuel pump relay. Turn ignition on. Using scan tool in voltmeter mode, check voltage on fuel pump relay connector terminal "A" (Dark Blue/White wire). If voltage is less than 10 volts, repair open Dark Blue/White wire. If voltage is more than 10 volts, go to next step.
  2. Using an external ohmmeter, check resistance between fuel pump relay terminals No. 85 and No. 86. (Scheme 8) If resistance is more than 100 ohms, replace fuel pump relay. If resistance is less than 100 ohms, repair open Dark Blue/Yellow wire.

To ensure no other trouble code remains, perform following

  1. If vehicle is equipped with A/C, turn A/C and blower motor on. Drive vehicle for at least 5 minutes and attain a speed of at least 40 MPH. Ensure transmission shifts through all gears.
  2. Upon completion of road test, turn engine off. Restart engine, and let idle for at least 2 minutes. Turn engine off. Connect scan tool to DLC.
  3. Read trouble codes. If repaired trouble code has reset, repair is not complete. Check all pertinent Technical Service Bulletins (TSBs), and return to «TEST TC-1A»(ref-11020-S30687321432000111000000) , if necessary. If another trouble code exists, return to TEST TC-1A and follow path specified by other trouble code. If no other trouble codes exist, repair is now complete.

More articles — Engine Controls - Tests W/codes - 3.5L