Engine Controls - Tests W/codes - 5.9l Dodge Ram Wagon B1500

INTRODUCTION

Perform all steps in the BASIC TESTING - 5.9L article. If no fault is found while performing BASIC DIAGNOSTIC PROCEDURES, proceed with self-diagnostics. If no Diagnostic Trouble Codes (DTCs) or only pass codes (system functioning properly) are found during self-diagnostics, proceed to NO TROUBLE CODES (NTC) TESTS, or the TESTS W/O CODES - 5.9L article for diagnosis by symptom.

SYSTEM DIAGNOSTICS

Note. Self-diagnostic tests are written specifically for Chrysler's Diagnostic Readout Box (DRB) scan tool. If using a generic scan tool, ensure scan tool is OBD-II certified. A generic scan tool may not be capable of performing all necessary test functions. Malfunction Indicator Light (MIL), also known as CHECK ENGINE light (located on instrument panel), must also be used for system diagnostics, but has limited diagnostic capability.

MIL

The Powertrain Control Module (PCM), located in engine compartment, monitors several different engine control system circuits. See PCM LOCATION table. If a malfunction occurs which affects vehicle emissions, PCM will turn on MIL the next time engine is started and the same malfunction is detected.

PCM LOCATION

Note. For information about engine misfire and fuel system monitoring, see ON-BOARD DIAGNOSTICS.

If PCM detects a cylinder(s) misfire, lean fuel condition or a rich fuel condition, MIL is immediately turned on. On manual transmission vehicles, MIL will either flash or light continuously during an active engine misfire. PCM will turn off MIL when malfunction is not detected during 3 run/stop cycles of engine of at least a 2 minute duration. MIL may be turned off by PCM, however, a DTC may remain stored depending on type of malfunction detected.

On-Board Diagnostics

The PCM monitors several different engine control system circuits. If malfunction occurs, PCM will store a DTC when malfunction is detected, and PCM will enter limp-in mode. In limp-mode, PCM substitutes values for failed component to continue engine operation, but loss of good driveability may result.

The PCM contains electronic circuit monitors that monitor fuel, vehicle emissions, engine and ignition system performance. Monitors use information from various sensor circuits for system monitoring. Monitors do not indicate a specific component failure, but indicate an implied failure within a specified system, and that the problem must be diagnosed. If any monitor detects a problem affecting vehicle emissions, a DTC will be stored in PCM. The following monitors are used

1. EGR Monitor
2. Engine Misfire Monitor
3. Fuel System Monitor
4. Oxygen Sensor Monitor
5. Oxygen Sensor Heater Monitor
6. Catalyst Monitor
7. EVAP System Leak Detection Monitor

The PCM will erase DTC once MIL is turned off. Once MIL is turned off, PCM must not detect the recent malfunction during 40 run/stop engine cycles with engine coolant temperature at least 160°F (71°C) on normal operation, or 80 run/stop engine cycles with engine coolant temperature at least 160°F (71°C) on engine misfire or fuel system monitor.

PCM also records and stores engine operating conditions when malfunction occurred. This information is referred to as freeze frame data. If malfunction is an engine misfire or fuel system rich or fuel system lean, freeze frame data will be updated with the most current information regarding these failures. Freeze frame data recorded is

1. Fuel System Status
2. Load Value (Displayed As Percent)
3. Long Term Adaptive (Displayed As Percent)
4. Short Term Adaptive (Displayed As Percent)
5. Absolute MAP (Displayed As Percent)
6. Engine RPM
7. Vehicle Speed Sensor
8. DTC During Data Recording

DTCs may be retrieved for system diagnosis by using scan tool and MIL. See RETRIEVING DTCS under SELF-DIAGNOSTIC SYSTEM. By using scan tool and MIL, self-diagnostic capabilities of this system can simplify testing and reduce diagnostic time. System malfunctions are identified as either hard failures or intermittent failures.

Hard Failures

Hard failures cause MIL to illuminate and remain on until problem is repaired. If MIL comes on and remains on during vehicle operation, cause of malfunction must be determined by retrieving DTCs. See RETRIEVING DTCS under SELF-DIAGNOSTIC SYSTEM. If a sensor fails, PCM will use substitute value in its calculations to continue engine operation. In this condition, commonly known as limp-in mode, the vehicle runs but driveability will not be optimum.

Intermittent Failures

Intermittent failures may cause MIL to flicker or illuminate and go out after intermittent failure goes away. However, the corresponding DTC will be retained in PCM memory. If related failure does not reoccur within a certain time frame, related DTC will be erased from PCM memory. Intermittent failures may be caused by a sensor, connector or wiring related problems. See INTERMITTENTS in the TESTS W/O CODES - 5.9L article.

SERVICE PRECAUTIONS

Before proceeding with system diagnosis, following precautions must be followed

1. Ensure fuel pressure is released before removing fuel line or fittings, as fuel system is under pressure and may cause personal injury. See «FUEL PRESSURE RELEASE»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l) procedure.
2. When performing self-diagnostic tests, DO NOT skip any steps, or incorrect diagnosis may result. Always perform indicated verification procedure after each repair.
3. When using a jumper wire, ensure either jumper wire or circuit is fuse-protected.
4. Before disconnecting connector from any control module, ensure ignition is off before removing connector.
5. When checking voltage or continuity at any control module, DO NOT backprobe connector (unless instructed to do otherwise in test procedure), or probe wires through the insulation.
6. DO NOT cause short circuits when performing electrical tests. This will set additional DTCs, making diagnosis of original problem more difficult.
7. Use test equipment specified in test procedures when performing electrical tests.
8. When checking for spark, ensure cable is NOT more than 1/4" from engine ground. If cable is more than 1/4" from engine ground, damage to vehicle electronics and/or PCM may result.
9. DO NOT prolong testing of fuel injectors or engine may hydrostatically lock.

DIAGNOSTIC PROCEDURE

If no faults were found while performing procedures in the BASIC TESTING - 5.9L article, proceed with self-diagnostics. Always perform a visual inspection before attempting to diagnose engine control system problems. See VISUAL INSPECTION. Retrieve DTCs using MIL and scan tool. See RETRIEVING DTCS .

VISUAL INSPECTION

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

RETRIEVING DTCS

Note. It will be necessary to use MIL and scan tool to retrieve all DTCs. When using MIL to retrieve DTCs, some DTCs have more than one meaning. The MIL is unable to distinguish between different failures for a specified component. For example, there are several possible failures for the downstream oxygen sensor system, but the MIL can only identify a downstream oxygen sensor failure by flashing a DTC 21, but the scan tool will be able to distinguish between the different failures. When using scan tool, scan tool is not able to identify all possible DTCs. As an example, scan tool may not be able to identify or display a DTC for a malfunctioning A/C clutch relay circuit, Auto Shutdown (ASD) relay circuit, or charging system voltage circuit, but these DTCs will be displayed by the MIL.

Using Malfunction Indicator Light (MIL)

1. Ensure battery is fully charged. Turn ignition on and note operation of MIL. When ignition is first turned on, MIL should come on and remain on for 3 seconds to verify bulb and circuit operation, and then go off. NOTE: If MIL does not come on for 3 seconds and then go off, bulb circuit may be defective, or problem area may exist on CCD Bus between PCM and instrument cluster. If problem exists with CCD Bus, this problem may be displayed when using scan tool to retrieve DTCs.
2. Attempt to start engine. Turn ignition off. Without starting engine, turn ignition on, off, on, off and on within 5 seconds. Record 2-digit DTCs as displayed by flashing MIL.
3. For example, DTC 24 will be displayed by 2 flashes, short pause, and then 4 more flashes. A short pause will exist between first and second digits on DTC. If more than one DTC is stored, after first DTC is displayed, there will be a longer pause and then another stored DTC will be displayed.
4. Once all DTCs are recorded, retrieve DTCs using scan tool to ensure all DTCs are obtained. See USING SCAN TOOL.

Scheme 45

1. Ensure battery is fully charged. Attempt to start engine. Turn ignition off. Connect scan tool to Data Link Connector (DLC). DLC is located below instrument panel near steering column. (Scheme 45)
2. Turn ignition on. Using scan tool manufacturer's instructions, record all DTCs displayed on scan tool. Using all DTCs obtained, proceed to «SELF-DIAGNOSTIC TESTS»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__self-diagnostic-tests). Once all repairs are made, ensure DTCs are cleared from PCM memory. See CLEARING DTCS.

CLEARING DTCS

Ensure ignition is off, then turn ignition on. Using scan tool manufacturer's instructions, erase DTCs from PCM memory.

INACTIVE DTC CONDITION

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

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

FUEL PRESSURE RELEASE

Vehicles With Fuel Rail Test Port

1. Loosen fuel tank filler cap. Ensure ignition is off. Remove protective cap from fuel rail test port.
2. Place one end of Fuel Pressure Release Hose (C-4799-1) into an approved fuel container. Attach remaining end of hose to fuel rail test port. Use care, as fuel system may be under pressure. Fuel pressure will be released from fuel system. Remove hose, reinstall protective cap, and fuel tank filler cap.
3. Wait 5 seconds. Use care when disconnecting fuel lines, as some fuel pressure may still exist in fuel lines.

Note. One or more DTCs may set when fuel pump relay is removed. Clear DTCs after fuel pressure release procedure. See CLEARING DTCS under SELF-DIAGNOSTIC SYSTEM.

Vehicles Without Fuel Rail Test Port

1. Remove fuel pump relay from Power Distribution Center (PDC). Relays are identified on label under PDC cover. Start and run engine until it stalls. Attempt to start engine. Continue restarting engine until it will no longer run. Turn ignition off. CAUTION: DO NOT supply power to fuel injector for more than 4 seconds, or fuel injector may be damaged.
2. Disconnect any fuel injector connector. Connect a jumper wire between either fuel injector terminal and positive battery terminal. Connect another jumper wire to other fuel injector terminal. Momentarily touch other end of jumper wire to negative battery terminal.
3. Place a shop towel under fuel line quick-connector at fuel rail. Use care when disconnecting fuel lines, as some fuel pressure may still exist in fuel lines. Disconnect fuel line quick-connector. Reinstall fuel pump relay in PDC. Clear DTCs. See «CLEARING DTCS»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__clearing-dtcs) under SELF-DIAGNOSTIC SYSTEM.

SUMMARY

If no hard failure DTCs are present, driveability symptoms exist or intermittent DTCs exist, proceed to TEST NTC-1A - NO TROUBLE CODES TEST MENU, or the TESTS W/O CODES - 5.9L article for diagnosis by symptom.

CONNECTOR IDENTIFICATION

Note. The following terminals are shown as viewed from harness side of connector. If actual connector wire colors differ from those shown in illustration, see wiring diagram in the WIRING DIAGRAMS - 5.9L article to ensure correct circuit is being tested.

CONNECTOR IDENTIFICATION DIRECTORY

Scheme 46

Scheme 47

Scheme 48

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Scheme 50

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Scheme 55

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Scheme 58

Scheme 59

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Scheme 61

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Scheme 81

SELF-DIAGNOSTIC TESTS

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

DTC TEST - CHECKING SYSTEM FOR DIAGNOSTIC TROUBLE CODES

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

1. Attempt to start engine. Crank engine for up to 10 seconds (if necessary). Diagnostic Trouble Codes (DTCs) may be retrieved using scan tool or Malfunction Indicator Light (MIL) on instrument panel.
2. If using MIL on instrument panel to check for DTCs, see USING MALFUNCTION INDICATOR LIGHT (MIL) under «RETRIEVING DTCS»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__retrieving-dtcs) for proper procedure. Go to step 6).
3. If using scan tool to check for DTCs, see USING SCAN TOOL under «RETRIEVING DTCS»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__retrieving-dtcs) .
4. If scan tool displays NO RESPONSE, go to TEST NS-SEL. If scan tool will not power up, check for loose cable connections or bad cable. If cable connections and cable are okay, check voltage at DLC terminal No. 16 (Pink wire). Voltage should be at least 11 volts. If voltage is not as specified, check wiring circuit and necessary fuses. See wiring diagram in the «WIRING DIAGRAMS - 5.9L»(/dodge/ram-wagon-b1500/1996-1997/remont/wiring-diagrams-engine-performance/#wiring-diagrams-59l-engine) article.
5. If scan tool displays an error message, 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 the VEHICLE COMMUNICATIONS article.
6. If DTCs are displayed, see «DTC MESSAGES & CODES»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l) table and perform appropriate test(s). If no DTCs are displayed, refer to one of the following: For driveability problems, perform TEST NTC-1A. For no-start problems, perform TEST NS-SEL. For speed control problems, refer to the CRUISE CONTROL SYSTEMS article. For charging system problems, refer to the GENERATORS & REGULATORS article in the ELECTRICAL section.

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

Note. Some DTCs have more than one meaning. Malfunction Indicator Light (MIL) is unable to distinguish between different failures. As an example, there are 4 different failures possible for Oxygen Sensor (O2S) system, MIL can only identify an O2S failure by flashing a DTC 21. MIL is capable of displaying all possible system failures.

Note. A scan tool may NOT be able to identify all possible DTCs. As an example, a scan tool may not be able to identify or display a DTC for a malfunctioning A/C clutch relay circuit, auto shutdown relay circuit or charging system voltage circuit.

DTC MESSAGES & CODES

TEST TC-1A - NO CAM SIGNAL AT PCM

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For component location, see wiring diagram in the WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, select SENSORS and read current Camshaft Position (CMP) count. Crank engine while observing scan tool display. If count does not change, go to step 4). If count changes, go to next step.
2. Condition required to set DTC is not present at this time. NO CAM SYNC SIGNAL AT PCM DTC sets if Powertrain Control Module (PCM) does not see a CMP sensor signal with crankshaft position sensor signal present. Possible causes are: open or shorted 5-volt supply circuit, open sensor ground, open or shorted signal circuit, excessive clearance between sensor and sprocket, damaged pulse ring or sprocket, defective sensor, or defective PCM. Go to next step.
3. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
4. Turn ignition off. Disconnect CMP sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
5. Turn ignition on. Using scan tool in voltmeter mode, check voltage on CMP connector, 5-volt supply circuit (Violet/White wire). If voltage is 4.5 volts or less, repair open 5-volt supply circuit and perform TEST VER-2A. If voltage is more than 4.5 volts, go to next step.
6. Connect one end of a jumper wire to CMP connector, 5-volt supply circuit (Violet/White wire). Using scan tool, select SENSORS and read current CMP count. While observing scan tool display, touch other end of jumper wire to CMP connector, ground circuit (Black/Light Blue wire). If count does not change, go to step 9). If count changes, go to next step.
7. Remove distributor cap and observe distributor rotor while cranking engine. If rotor does not turn, repair distributor drive system as necessary and perform TEST VER-2A. If rotor turns, replace CMP sensor and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-1A to TEST TC-5A. No tests have been omitted.

TEST TC-5A - CHARGING SYSTEM VOLTAGE TOO LOW

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For component location, see wiring diagram in the WIRING DIAGRAMS - 5.9L article.

1. Start engine. Using scan tool, read TARGET CHARGING VOLTAGE. If voltage is 15.1 volts or less, go to step 5). If voltage is more than 15.1 volts, go to next step.
2. Using scan tool, read battery temperature sensor temperature. Using a thermometer, read underhood temperature. If scan tool reading and thermometer reading are within 10 percent of each other, go to step 5). If temperatures are not within 10 percent of each other, go to next step.
3. Disconnect battery temperature sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
4. Connect a jumper wire across battery temperature sensor terminals. Using scan tool, read battery temperature sensor voltage. If voltage is zero, replace battery temperature sensor and perform TEST VER-2A. If any voltage exists, replace powertrain control module and perform TEST VER-2A.
5. Using an external voltmeter, connect one voltmeter lead to B+ (battery) terminal on rear of generator. Connect other voltmeter lead to positive battery terminal. Go to next step. CAUTION: Ensure all wires are clear of any moving engine parts.
6. Start engine and note voltage reading on voltmeter. If voltage is more than 0.4 volt, repair B+ circuit between battery and generator for high resistance and perform TEST VER-2A. If voltage is 0.4 volt or less, go to next step.
7. Turn ignition off. Using external voltmeter, connect one voltmeter lead to generator case. Connect other voltmeter lead to negative battery terminal. Go to next step. CAUTION: Ensure all wires are clear of any moving engine parts.
8. Start engine and allow to reach operating temperature. Note voltage reading on voltmeter. If voltage is more than 0.1 volt, repair generator ground circuit between battery and generator for high resistance and perform TEST VER-2A. If voltage is 0.1 volt or less, go to next step.
9. Maintain engine speed at 1600 RPM. Using scan tool, read target charging voltage and charging voltage. Compare readings. If difference between readings is more than one volt, repair or replace generator as necessary and perform TEST VER-2A. If difference between readings is one volt or less, go to next step.
10. Allow engine to idle. Turn ignition off. Perform TEST CH-1A in the GENERATORS & REGULATORS article in the ELECTRICAL section.

TEST TC-6A - CHARGING SYSTEM VOLTAGE TOO HIGH

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For component location, see wiring diagram in the WIRING DIAGRAMS - 5.9L article.

1. Turn ignition on. Using scan tool, actuate generator field driver. Using an external voltmeter, backprobe field driver circuit (Dark Green/White wire) in 2-wire connector on rear of generator. If voltage cycles from low voltage to high voltage, perform TEST TC-6B. If voltage does not cycle from low voltage to high voltage, go to next step.
2. Using scan tool, stop generator field driver actuation. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
3. Disconnect 2-wire connector on rear of generator. Using an external ohmmeter, check resistance of PCM White connector, field driver circuit (Dark Green/White wire) to ground. If resistance is less than 5 ohms, repair short to ground in field driver circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
4. Check resistance of field driver terminal in generator (Dark Green/White wire). If resistance is less than 5 ohms, repair or replace generator and perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.

TEST TC-6B - CHARGING SYSTEM VOLTAGE TOO HIGH

Note. Perform TEST TC-6A before proceeding.

1. Using scan tool, stop generator field driver actuation. Note target charging voltage. If voltage is more than 13 volts, go to step 3). If voltage is 13 volts or less, go to next step.
2. Using scan tool, read battery temperature sensor temperature. Using a thermometer, read underhood temp. If temperatures are within 10 percent of each other, perform TEST TC-153A. If temperatures are not within 10 percent of each other, go to next step.
3. Start and maintain engine speed at 1600 RPM. Using scan tool, read target charging voltage and charging voltage. Compare readings for 5 minutes. If difference between readings is more than one volt, replace powertrain control module and perform TEST VER-2A. If difference between readings is one volt or less, go to next step.
4. Allow engine to idle. Turn ignition off. Perform TEST CH-1A in the GENERATORS & REGULATORS article in the ELECTRICAL section.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-6B to TEST TC-10A. No tests have been omitted.

TEST TC-10A - AUTO SHUTDOWN RELAY CONTROL CIRCUIT

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For component location, see wiring diagram in the WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, actuate Auto Shutdown (ASD) relay. Listen for clicking sound at ASD relay. If no clicking sound is heard at ASD relay, go to step 6). If clicking sound is heard at ASD relay, go to next step.
2. Condition required to set DTC is not present at this time. AUTO SHUTDOWN RELAY CONTROL CIRCUIT sets if Powertrain Control Module (PCM) detects an open or shorted condition in ASD relay control circuit. Possible causes are: open or shorted relay coil, open fused ignition output circuit, open or shorted ASD relay control circuit, defective PCM, defective connector terminals or connector wires. Go to next step.
3. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, start engine. Go to next step.
4. Wiggle wiring harness from ASD relay to PCM. If engine stalls while wiggling wiring harness, repair wiring as necessary and perform TEST VER-2A. If engine does not stall, see procedures under «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.

Testing Relay Terminals (Typical). Scheme 82

TEST TC-11A - GENERATOR FIELD NOT SWITCHING PROPERLY

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For component location, see wiring diagram in the WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, actuate generator field driver circuit. Using scan tool in voltmeter mode, backprobe Auto Shutdown (ASD) relay output circuit (Dark Green/Orange wire) in 2-wire connector on rear of generator. If voltage is 10 volts or less, repair open ASD relay output circuit from generator to splice and perform TEST VER-3A. If voltage is more than 10 volts, go to next step.
2. Backprobe generator field driver circuit (Dark Green/White wire) in 2-wire connector on rear of generator. If voltage does not cycle from low voltage to high voltage, go to step 6). If voltage cycles from low voltage to high voltage, go to next step.
3. Condition required to set DTC is not present at this time. GENERATOR FIELD NOT SWITCHING PROPERLY DTC sets if Powertrain Control Module (PCM) tries to regulate generator field with no result. Possible causes are: open or shorted wiring, defective connectors, defective generator or PCM. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connections as necessary and perform TEST VER-3A. If wiring and connections are okay, go to next step.
5. Ensure actuator test is still running. Using scan tool, check for DTCs. Wiggle wiring harness from generator to PCM and note if GENERATOR FIELD NOT SWITCHING PROPERLY DTC resets. If DTC resets, repair wiring harness as necessary and perform TEST VER-3A. If DTC does not reset, see INACTIVE DTC CONDITION. Test is complete. Perform TEST VER-3A.
6. Using scan tool, stop generator field driver actuation. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-3A. If connectors and terminals are okay, go to next step.
7. Disconnect 2-wire connector on rear of generator. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-3A. If connector and terminals are okay, go to next step.
8. Using an external ohmmeter, check resistance of generator field driver circuit (Dark Green/White wire) between PCM White connector and generator 2-wire connector. If resistance is 5 ohms or more, repair open generator field driver circuit between PCM and generator and perform TEST VER-3A. If resistance is less than 5 ohms, go to next step.
9. Ensure 2-wire connector on rear of generator is disconnected. Using external ohmmeter, check resistance across terminals that 2-wire connector fits on at rear of generator. If resistance is 5 ohms or more, repair or replace generator as necessary and perform TEST VER-3A. If resistance is less than 5 ohms, go to next step.
10. Using scan tool in ohmmeter mode, check resistance of generator field driver circuit (Dark Green/White wire) in generator 2-wire connector to ground. If resistance is less than 5 ohms, repair short to ground in field driver circuit and perform TEST VER-3A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-3A.

TEST TC-12A - TORQUE CONVERTER CLUTCH (TCC) SOLENOID/TRANS

RELAY CKT

Note. Test applies to vehicles equipped with automatic transmission only.

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For component location, see wiring diagram in the WIRING DIAGRAMS - 5.9L article.

1. If vehicle is not equipped with 4-speed electronic transmission, perform TEST TC-12F. If vehicle is equipped with 4-speed electronic transmission, turn ignition off and go to next step.
2. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
3. Remove transmission control relay. Inspect relay connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
4. Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM White connector, TCC solenoid circuit (Orange/Black wire). If voltage is more than one volt, go to step 7). If voltage is one volt or less, go to next step.
5. Turn ignition off. Using an external ohmmeter, check resistance between PCM White connector, TCC solenoid circuit (Orange/Black wire), and transmission control relay, transmission control relay output circuit (Light Blue wire). If resistance is 40 ohms or more, perform TEST TC-12B. If resistance is less than 26 ohms, perform TEST TC-12C. If resistance is 26-40 ohms, go to next step.
6. Check resistance between engine ground and PCM White connector, TCC solenoid circuit (Orange/Black wire). If resistance is less than 5 ohms, perform TEST TC-12D. If resistance is 5 ohms or more, perform TEST TC-12E.
7. Ensure ignition is off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step. NOTE: Transmission control relay is turned off by PCM after 3 seconds with ignition on and engine off.
8. Turn ignition on. Using scan tool in voltmeter mode, check voltage on transmission solenoid connector, TCC solenoid circuit (Orange/Black wire). If voltage is more than one volt, repair short to voltage in TCC solenoid circuit and perform TEST VER-2A. If voltage is one volt or less, go to next step.
9. Check voltage on transmission solenoid connector, transmission relay output circuit (Light Blue wire). If voltage is more than one volt, repair short to ground in transmission relay output circuit and perform TEST VER-2A. If voltage is one volt or less, replace transmission solenoid pack and perform TEST VER-2A.

TEST TC-12B - TORQUE CONVERTER CLUTCH (TCC) SOLENOID/TRANS

RELAY CKT

Note. Perform TEST TC-12A before proceeding.

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For component location, see wiring diagram in the WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of TCC solenoid control circuit (Orange/Black wire) between PCM White connector and transmission solenoid connector. If resistance is 5 ohms or more, repair TCC solenoid control circuit as necessary and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
3. Check resistance of transmission relay control output circuit (Light Blue wire). If resistance is more than 5 ohms, repair open TCC solenoid control circuit (Orange/Black wire). If resistance is 5 ohms or less, replace solenoid pack and perform TEST VER-2A.

TEST TC-12C - TORQUE CONVERTER CLUTCH (TCC) SOLENOID/TRANS

RELAY CKT

Note. Perform TEST TC-12A before proceeding.

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For component location, see wiring diagram in the WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance between PCM White connector, TCC solenoid control circuit (Orange/Black wire), and transmission control relay connector, transmission control relay output circuit (Light Blue wire). If resistance is less than 5 ohms, repair TCC solenoid control circuit for a short to transmission control relay output circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace transmission solenoid pack and harness, and perform TEST VER-2A.

TEST TC-12D - TORQUE CONVERTER CLUTCH (TCC) SOLENOID/TRANS

RELAY CKT

Note. Perform TEST TC-12A before proceeding.

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For component location, see wiring diagram in the WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance between PCM White connector, TCC solenoid control circuit (Orange/Black wire), and engine ground. If resistance is less than 5 ohms, repair short to ground in TCC solenoid circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
3. Check resistance between transmission solenoid connector, transmission relay output circuit (Light Blue wire) and engine ground. If resistance is less than 5 ohms, repair short in transmission relay output circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace transmission solenoid pack and perform TEST VER-2A.

TEST TC-12E - TORQUE CONVERTER CLUTCH (TCC) SOLENOID/TRANS

RELAY CKT

Note. Perform TEST TC-12A before proceeding.

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For component location, see wiring diagram in the WIRING DIAGRAMS - 5.9L article.

1. Condition required to set DTC is not present at this time. TCC SOLENOID CIRCUIT DTC sets if an open or shorted circuit exists in TCC solenoid circuit. Possible causes are: open or shorted wiring to TCC solenoid, open fused ignition switch output circuit, defective connector terminals, or defective TCC solenoid. Go to next step.
2. Inspect all related wiring and connectors. Repair wiring and connections as necessary and perform TEST VER-2A. If wiring is okay, go to next step.
3. Using scan tool, actuate TCC solenoid and check for DTCs. Wiggle wiring harness from TCC solenoid to PCM and note if TCC SOLENOID CIRCUIT DTC resets. If DTC resets, repair wiring harness as necessary and perform TEST VER-2A. If DTC does not reset, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . If procedures in INACTIVE DTC CONDITION pass, replace PCM and perform TEST VER-2A.

TEST TC-12F - TORQUE CONVERTER CLUTCH (TCC) SOLENOID/TRANS

RELAY CKT

Note. Test applies to vehicles equipped with 3-speed automatic transmission only. Perform TEST TC-12A before proceeding.

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY. For component location, see wiring diagram in the WIRING DIAGRAMS - 5.9L article.

1. Ensure ignition is off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Turn ignition on. Using scan tool in voltmeter mode, check voltage on TCC connector, fused ignition switch output circuit (Light Green/Black wire). If voltage is less than 10 volts, repair open fused ignition switch output circuit and perform TEST VER-2A. If voltage is 10 volts or less, go to next step.
3. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
4. Using scan tool in ohmmeter mode, check resistance of PCM White connector, TCC solenoid control circuit (Orange/Black wire). If resistance is less than 5 ohms, repair short to ground in TCC solenoid control circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
5. Using an external ohmmeter, check resistance of TCC solenoid control circuit (Orange/Black wire) between PCM White connector and TCC solenoid connector. If resistance less than 5 ohms, replace PCM and perform TEST VER-2A. If resistance is 5 ohms or more, repair open TCC solenoid control circuit and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-12F to TEST TC-15A. No tests have been omitted.

TEST TC-15A - SPEED CONTROL SOLENOID CIRCUITS OR SPEED

CONTROL POWER RELAY CIRCUITS

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read, record and clear DTCs. Start engine. Using scan tool, monitor Speed Control (S/C) ON/OFF SWITCH STATE while switching S/C on and off. If scan tool display switches ON then OFF, perform TEST TC-15B. If scan tool display does not switch ON then OFF, go to next step.
2. Disconnect S/C connector. Using an external ohmmeter, check resistance across specified S/C switch terminals. If resistance is not as specified, replace S/C switch and perform TEST VER-4A. See SPEED CONTROL SWITCH RESISTANCE SPECIFICATIONS table. If resistance is as specified, go to next step. SPEED CONTROL SWITCH RESISTANCE SPECIFICATIONS Switch Position Check Between Terminals No. Ohms Off 1 & 2 798-814 Off 2 & 3 Open On 2 & 3 900-918 Resume/Accel 2 & 3 15,246-15,554 Set/Coast 2 & 3 6584-6716 NOTE: DO NOT depress brake pedal during following step.
3. With S/C switch on, disconnect S/C servo 4-pin connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-4A. If connector and terminals are okay, go to next step.
4. Using scan tool, actuate S/C vent solenoid. Using scan tool in voltmeter mode, check voltage on S/C servo 4-pin connector, switched S/C power supply circuit (Dark Blue/Red wire). If voltage is more than 10 volts, perform TEST TC-15B. If voltage is 10 volts or less, perform TEST TC-15C.

Speed Control Switch Terminals. Scheme 83

TEST TC-15B - SPEED CONTROL SOLENOID CIRCUITS OR SPEED

CONTROL POWER RELAY CIRCUITS

Note. Perform TEST TC-15A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Note. DO NOT depress brake pedal during following test.

1. Using scan tool in ohmmeter mode, check resistance of S/C servo 4-pin connector, ground circuit (Black wire). If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-4A. If resistance is less than 5 ohms, go to next step.
2. Turn ignition off. Reconnect S/C servo 4-pin connector. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-4A. If connectors and terminals are okay, go to next step.
3. Using an external ohmmeter, check resistance between PCM Gray connector, 12-volt supply circuit (Yellow/Red wire) and S/C vent solenoid control circuit (Light Green/Red wire). If resistance is 35-55 ohms, replace PCM and perform TEST VER-4A. If resistance is not 35-55 ohms, go to next step.
4. Check resistance between PCM Gray connector, 12-volt supply circuit (Yellow/Red wire) and S/C vacuum solenoid control circuit (Tan/Red wire). If resistance is 35-55 ohms, replace PCM and perform TEST VER-4A. If resistance is not 35-55 ohms, go to next step.
5. Check resistance of S/C vacuum solenoid control circuit (Tan/Red wire) between PCM Gray connector and S/C servo 4-pin connector. If resistance is 5 ohms or more, repair open S/C vacuum solenoid control circuit and perform TEST VER-4A. If resistance is less than 5 ohms, go to next step.
6. Check resistance of S/C vent solenoid control circuit (Light Green/Red wire) between PCM Gray connector and S/C servo 4-pin connector. If resistance is less than 5 ohms, replace speed control servo and perform TEST VER-4A. If resistance is 5 ohms or more, repair open S/C vent solenoid control circuit and perform TEST VER-4A.

TEST TC-15C - SPEED CONTROL SOLENOID CIRCUITS OR SPEED

CONTROL POWER RELAY CIRCUITS

Note. Perform TEST TC-15A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Disconnect brakelight switch connector. Using scan tool in voltmeter mode, check voltage on brakelight switch connector, S/C (ON/OFF switch sense) power supply circuit (Yellow/Red wire). If voltage is 10 volts or less, perform TEST TC-15D. If voltage is more than 10 volts, go to next step.
2. Using an external ohmmeter, check resistance of switched S/C power supply circuit (Dark Blue/Red wire) between S/C servo 4-pin connector and brakelight switch connector. If resistance is less than 5 ohms, replace brakelight switch and perform TEST VER-4A. If resistance is 5 ohms or more, repair open switched S/C power supply circuit and perform TEST VER-4A.

TEST TC-15D - SPEED CONTROL SOLENOID CIRCUITS OR SPEED

CONTROL POWER RELAY CIRCUITS

Note. Perform TEST TC-15A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-4A. If connectors and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of S/C (ON/OFF switch sense) power supply circuit (Yellow/Red wire) between PCM Gray connector and brakelight switch connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-4A. If resistance is 5 ohms or more, repair open S/C (ON/OFF switch sense) power supply circuit and perform TEST VER-4A.

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

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, actuate A/C clutch relay. Listen for clicking sound at A/C clutch relay. If no clicking sound is heard at A/C clutch relay, go to step 5). If clicking sound is heard at ASD relay, go to next step.
2. Condition required to set DTC is not present at this time. A/C CLUTCH RELAY CIRCUIT DTC sets if Powertrain Control Module (PCM) detects an open or shorted condition in A/C clutch relay control circuit. Possible causes are: open or shorted relay coil, open fused ignition output circuit, open or shorted A/C clutch relay control circuit, defective PCM, defective connector terminals or connector wires. Go to next step.
3. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, go to next step.
4. Wiggle wiring harness from A/C clutch relay to PCM. Ensure scan tool is still actuating A/C clutch relay. If A/C clutch relay stops clicking, repair harness as necessary and perform TEST VER-2A. If A/C clutch relay continues clicking, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition). Test is complete. Perform TEST VER-2A.
5. Remove A/C clutch relay. Inspect relay connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Using scan tool in voltmeter mode, check voltage on A/C clutch relay connector, fused ignition switch output circuit (Dark Blue). If voltage is 10 volts or less, repair open fused ignition switch output circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step.
7. Using an external ohmmeter, check resistance between A/C clutch relay terminals No. 85 and 86. (Scheme 82) If resistance is 100 ohms or more, replace A/C clutch relay and perform TEST VER-2A. If resistance is less than 100 ohms, go to next step.
8. Ensure ignition is off. Disconnect PCM Gray connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
9. Using scan tool in ohmmeter mode, check resistance of PCM Gray connector, A/C compressor clutch relay control circuit (Dark Blue/Orange wire). If resistance is less than 5 ohms, repair short to ground in A/C compressor clutch relay control circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
10. Using an external ohmmeter, check resistance of A/C compressor clutch relay control circuit (Dark Blue/Orange wire) between A/C clutch relay connector and PCM Gray connector. If resistance is 5 ohms or more, repair open A/C compressor clutch relay control circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

TEST TC-17A - EGR SOLENOID CIRCUIT

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, actuate EGR solenoid. If EGR solenoid does not click, go to step 5). If EGR solenoid clicks, go to next step.
2. Condition required to set DTC is not present at this time. EGR SOLENOID CIRCUIT DTC sets if an open or shorted circuit exists in EGR solenoid and EGR solenoid does not operate when activated by PCM. Possible causes are: open or shorted wiring to EGR solenoid, defective EGR solenoid or PCM. Go to next step.
3. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, go to next step.
4. Using scan tool, read DTCs. Ensure actuator test is still running. Wiggle wiring harness from EGR solenoid to PCM and note if EGR SOLENOID CIRCUIT DTC resets, repair wiring harness as necessary and perform TEST VER-2A. If DTC does not reset, see INACTIVE DTC CONDITION. Test is complete. Perform TEST VER-2A.
5. Ensure ignition is off. Disconnect EGR solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Turn ignition on. Using scan tool in voltmeter mode, check voltage on EGR solenoid connector, fused ignition switch output circuit (Light Green/Black wire). If voltage 10 volts or less, repair open fused ignition switch output circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step.
7. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
8. Using an external ohmmeter, check resistance of EGR solenoid control circuit (Gray/Yellow wire) between EGR solenoid connector and PCM White connector. If resistance is 5 ohms or more, repair open EGR solenoid control circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
9. Using scan tool in ohmmeter mode, check resistance of EGR solenoid connector, EGR solenoid control circuit (Gray/Yellow wire). If resistance is less than 5 ohms, repair short to ground in EGR solenoid control circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
10. Reconnect EGR solenoid connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM White connector, EGR solenoid control circuit (Gray/Yellow wire). If voltage is 10 volts or less, replace EGR solenoid and perform TEST VER-2A. If voltage is more than 10 volts, replace PCM and perform TEST VER-2A.

TEST TC-18A - EVAP PURGE SOLENOID CIRCUIT

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, monitor PURGE SOLENOID STATE. Start engine and allow it to reach normal operating temperature. Disconnect EVAP purge solenoid vacuum hose (between EVAP purge solenoid and EVAP canister). If vacuum does not exist when scan tool displays DUTY CYCLE MORE THAN 0 PERCENT, go to step 5). If vacuum exists in hose when scan tool displays DUTY CYCLE MORE THAN 0 PERCENT, go to next step.
2. Condition required to set DTC is not present at this time. EVAP PURGE SOLENOID CIRCUIT DTC sets if actual state of EVAP purge solenoid operation does not match intended state. Possible causes are: open or shorted wiring to EVAP purge solenoid, defective EVAP purge solenoid or PCM. Go to next step.
3. Check for defective wiring and connections at EVAP purge solenoid, PCM and fused voltage supply wiring to EVAP purge solenoid. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, go to next step.
4. Using scan tool, read DTCs. Ensure actuator test is still running. Wiggle wiring harness from EVAP purge solenoid to PCM. If EVAP PURGE SOLENOID CIRCUIT DTC resets, repair wiring harness as necessary and perform TEST VER-2A. If DTC does not reset, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
5. Turn ignition off. Disconnect EVAP purge solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Turn ignition on. Using scan tool in voltmeter mode, check voltage on EVAP purge solenoid connector, fused ignition switch circuit (Light Green/Black wire). If voltage is 10 volts or less, repair open fused ignition switch circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step.
7. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
8. Using an external ohmmeter, check resistance of EVAP purge solenoid control circuit (Pink/Black wire) between EVAP purge solenoid connector and PCM Gray connector. If resistance 5 ohms or more, repair open EVAP purge solenoid control circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
9. Using scan tool in ohmmeter mode, check resistance of PCM Gray connector, EVAP purge solenoid control circuit (Pink/Black wire). If resistance is 5 ohms or more, repair short to ground in EVAP purge solenoid control circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
10. Reconnect EVAP purge solenoid connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM Gray connector, EVAP purge control solenoid circuit (Pink/Black wire). If voltage is 10 volts or less, replace EVAP purge solenoid and perform TEST VER-2A. If voltage is more than 10 volts, replace PCM and perform TEST VER-2A.

TEST TC-19A - INJECTOR #3 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect injector No. 3 electrical connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance across injector No. 3 terminals. If resistance is not 10-16 ohms, replace injector and perform TEST VER-2A. If resistance is 10-16 ohms, go to next step.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on injector No. 3 connector, ASD relay output circuit (Dark Green/Orange wire). If voltage does not cycle from high voltage to low voltage, repair open ASD relay output circuit and perform TEST VER-2A. If voltage cycles from high voltage to low voltage, go to next step.
4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of PCM White connector, injector No. 3 driver circuit (Yellow/White wire). If resistance is less than 5 ohms, repair short to ground in injector No. 3 driver circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
6. Using an external ohmmeter, check resistance of injector No. 3 driver circuit (Yellow/White wire) between injector No. 3 connector and PCM White connector. If resistance is 5 ohms or more, repair open injector No. 3 driver circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

TEST TC-20A - INJECTOR #2 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect injector No. 2 electrical connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance across injector No. 2 terminals. If resistance is not 10-16 ohms, replace injector and perform TEST VER-2A. If resistance is 10-16 ohms, go to next step.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on injector No. 2 connector, ASD relay output circuit (Dark Green/Orange wire). If voltage does not cycle from high voltage to low voltage, repair open ASD relay output circuit and perform TEST VER-2A. If voltage cycles from high voltage to low voltage, go to next step.
4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of PCM White connector, injector No. 2 driver circuit (Tan wire). If resistance is less than 5 ohms, repair short to ground in injector No. 2 driver circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
6. Using an external ohmmeter, check resistance of injector No. 2 driver circuit (Tan wire) between injector No. 2 connector and PCM White connector. If resistance is 5 ohms or more, repair open injector No. 2 driver circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

TEST TC-21A - INJECTOR CONTROL CIRCUITS

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Start engine and allow to idle for at least 20 seconds. Shut engine off. Turn ignition on. DO NOT restart engine. Go to next step.
2. Using scan tool, read DTCs. If scan tool displays INJECTOR CONTROL CIRCUIT with a start run count of zero, perform appropriate test. See INJECTOR CONTROL CIRCUIT TESTS table. If scan tool does not display INJECTOR CONTROL CIRCUIT with a start run count of zero, go to next step. INJECTOR CONTROL CIRCUIT TESTS Scan Tool Display Test INJECTOR #1 CONTROL CIRCUIT TEST TC-21B INJECTOR #2 CONTROL CIRCUIT TEST TC-20A INJECTOR #3 CONTROL CIRCUIT TEST TC-19A INJECTOR #4 CONTROL CIRCUIT TEST TC-61A INJECTOR #5 CONTROL CIRCUIT TEST TC-69A INJECTOR #6 CONTROL CIRCUIT TEST TC-70A INJECTOR #7 CONTROL CIRCUIT TEST TC-79A INJECTOR #8 CONTROL CIRCUIT TEST TC-80A
3. Condition required to set DTC is not present at this time. INJECTOR CONTROL CIRCUIT DTC is set if no inductive activation is sensed by Powertrain Control Module (PCM) after injector turns off, and with no other injectors on. Possible causes are: open or shorted injector wiring, defective Auto Shutdown (ASD) relay wiring circuit to injector, defective connections, open injector or defective PCM. Go to next step.
4. Check for defective wiring and connections at injectors, ASD relay and PCM. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, go to next step.
5. Start engine. Wiggle wiring harness from injectors to PCM. If engine misfires or stalls, repair wiring harness as necessary and perform TEST VER-2A. If engine does not misfire or stall, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.

TEST TC-21B - INJECTOR #1 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect injector No. 1 electrical connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance across injector No. 1 terminals. If resistance is not 10-16 ohms, replace injector and perform TEST VER-2A. If resistance is 10-16 ohms, go to next step.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on injector No. 1 connector, ASD relay output circuit (Dark Green/Orange wire). If voltage does not cycle from high voltage to low voltage, repair open ASD relay output circuit and perform TEST VER-2A. If voltage cycles from high voltage to low voltage, go to next step.
4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of PCM White connector, injector No. 1 driver circuit (White/Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in injector No. 1 driver circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
6. Using an external ohmmeter, check resistance of injector No. 1 driver circuit (White/Dark Blue wire) between injector No. 1 connector and PCM White connector. If resistance is 5 ohms or more, repair open injector No. 1 driver circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-21B to TEST TC-25A. No tests have been omitted.

TEST TC-25A - IDLE AIR CONTROL MOTOR CIRCUITS

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Ensure ignition is off for at least 10 seconds. Start engine and allow it to idle for 20 seconds. Using scan tool, actuate Idle Air Control (IAC) motor to 1400 RPM. If engine speed is not 1300-1500 RPM, go to step 7). If engine speed is 1300-1500 RPM, go to next step.
2. Using scan tool, actuate IAC motor to 900 RPM. If engine speed is not 800-1000 RPM, go to step 7). If engine speed is 800-1000 RPM, go to next step.
3. Condition required to set DTC is not present at this time. IDLE AIR CONTROL MOTOR CIRCUITS DTC sets if Powertrain Control Module (PCM) senses a short to ground or battery voltage on any of 4 IAC motor driver circuits while IAC motor is operating. PCM cannot detect an open circuit or stuck IAC motor. Possible causes are: grounded or shorted IAC motor wiring, defective connections, defective IAC motor or PCM. Go to next step.
4. Check for defective wiring/connections at IAC motor and PCM. Repair wiring/connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, go to next step.
5. Start engine and allow it to reach normal operating temperature. Using scan tool, actuate IAC wiggle test. Engine speed should increase and decrease in accordance with scan tool display. If engine speed does not operate correctly, go to step 7). If engine speed operates correctly, go to next step.
6. Wiggle wiring harness from IAC motor to PCM. If IAC motor stops operating while moving wiring harness, repair wiring as necessary and perform TEST VER-2A. If IAC motor does not stop operating, stop IAC wiggle test. See «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
7. Ensure ignition is off. Disconnect IAC motor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
8. Using scan tool in ohmmeter mode, check resistance of IAC motor connector, driver No. 1 circuit (Violet/Black wire). If resistance is less than 5 ohms, repair short to ground in driver No. 1 circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
9. Check resistance of IAC motor connector, driver No. 2 circuit (Brown/White wire). If resistance is less than 5 ohms, repair short to ground in driver No. 2 circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
10. Check resistance of IAC motor connector, driver No. 3 circuit (Yellow/Black wire). If resistance is less than 5 ohms, repair short to ground in driver No. 3 circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
11. Check resistance of IAC motor connector, driver No. 4 circuit (Gray/Red wire). If resistance is less than 5 ohms, repair short to ground in driver No. 4 circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step. NOTE: Voltage may switch or remain constant in steps 12)-15).
12. Using scan tool, actuate IAC motor. Using scan tool in voltmeter mode, check voltage on IAC motor connector, driver No. 1 circuit (Violet/Black wire). If voltage is not present at any time, perform TEST TC-25B. If voltage is present at any time, go to next step.
13. Check voltage on IAC motor connector, driver No. 2 circuit (Brown/White wire). If voltage is not present at any time, perform TEST TC-25C. If voltage is present at any time, go to next step.
14. Check voltage on IAC motor connector, driver No. 3 circuit (Yellow/Black wire). If voltage is not present at any time, perform TEST TC-25D. If voltage is present at any time, go to next step.
15. Check voltage on IAC motor connector, driver No. 4 circuit (Gray/Red wire). If voltage is not present at any time, perform TEST TC-25E. If voltage is present at any time, go to next step.
16. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step. NOTE: Steps 17)-20) check for short circuits between IAC motor driver circuits.
17. Using an external ohmmeter, check resistance between IAC motor connector, driver No. 1 circuit (Violet/Black wire) and each remaining circuit on IAC motor connector. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together and perform TEST VER-2A. If resistance is 5 ohms or more on all IAC motor driver circuits, go to next step.
18. Check resistance between IAC motor connector, driver No. 2 circuit (Brown/White wire) and each remaining circuit on IAC motor connector. If resistance less than 5 ohms between any 2 circuits, repair driver circuits shorted together and perform TEST VER-2A. If resistance is 5 ohms or more on all IAC motor driver circuits, go to next step.
19. Check resistance between IAC motor connector, driver No. 3 circuit (Yellow/Black wire) and each remaining circuit on IAC motor connector. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together and perform TEST VER-2A. If resistance is 5 ohms or more on all IAC motor driver circuits, go to next step.
20. Check resistance between IAC motor connector, driver No. 4 circuit (Gray/Red wire) and each remaining circuit on IAC motor connector. If resistance less than 5 ohms between any 2 circuits, repair driver circuits shorted together and perform TEST VER-2A. If resistance 5 ohms or more, replace IAC motor and perform TEST VER-2A.

TEST TC-25B - IDLE AIR CONTROL MOTOR CIRCUITS

Note. Perform TEST TC-25A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of IAC motor connector, driver No. 1 circuit (Violet/Black wire) between IAC motor connector and PCM Black connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A. If resistance is 5 ohms or more, repair open driver No. 1 circuit and perform TEST VER-2A.

TEST TC-25C - IDLE AIR CONTROL MOTOR CIRCUITS

Note. Perform TEST TC-25A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of IAC motor connector, driver No. 2 circuit (Brown/White wire) between IAC motor connector and PCM Black connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A. If resistance is 5 ohms or more, repair open driver No. 2 circuit and perform TEST VER-2A.

TEST TC-25D - IDLE AIR CONTROL MOTOR CIRCUITS

Note. Perform TEST TC-25A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of IAC motor connector, driver No. 3 circuit (Yellow/Black wire) between IAC motor connector and PCM Black connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A. If resistance is 5 ohms or more, repair open driver No. 3 circuit and perform TEST VER-2A.

TEST TC-25E - IDLE AIR CONTROL MOTOR CIRCUITS

Note. Perform TEST TC-25A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of IAC motor connector, driver No. 4 circuit (Gray/Red wire) between IAC motor connector and PCM Black connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A. If resistance is 5 ohms or more, repair open driver No. 4 circuit and perform TEST VER-2A.

TEST TC-26A - THROTTLE POSITION SENSOR VOLTAGE LOW

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition on. Using scan tool, read Throttle Position (TP) sensor voltage. If voltage is less than 0.2 volt, go to step 6). If voltage is 0.2 volt or more, go to next step.
2. While monitoring TP sensor voltage, slowly open and close throttle. If voltage does not change smoothly, replace TP sensor and perform TEST VER-2A. If voltage changes smoothly, release throttle and go to next step.
3. With throttle at closed position, wiggle wiring harness and connector going to TP sensor on throttle while monitoring voltage. If voltage changes while wiggling wiring harness, repair wiring harness and connector as necessary and perform TEST VER-2A. If voltage does not change while wiggling wiring harness, go to next step.
4. Condition required to set DTC is not present at this time. THROTTLE POSITION SENSOR VOLTAGE LOW DTC sets in Powertrain Control Module (PCM) if TP sensor voltage at PCM is less than 0.2 volt for .704 second 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 TP sensor voltage less than 0.5 volt for .704 second. Possible causes are: open or shorted TP sensor wiring, defective connections, defective TP sensor or PCM. Go to next step.
5. Check for defective wiring/connections at TP sensor and PCM. Repair wiring/connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
6. Disconnect TP sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
7. Using scan tool in voltmeter mode, check voltage on TP sensor connector, 5-volt supply circuit (Violet/White wire). If voltage is less than 4 volts, repair open 5-volt supply circuit and perform TEST VER-2A. If voltage is 4 volts or more, go to next step.
8. Using scan tool, read TP sensor voltage. If voltage is more than one volt, replace TP sensor and perform TEST VER-2A. If voltage is one volt or less, go to next step.
9. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
10. Using scan tool in ohmmeter mode, check resistance of TP sensor connector, signal circuit (Orange/Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in signal circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
11. Using external ohmmeter, check resistance between TP sensor connector, signal circuit (Orange/Dark Blue wire) and ground circuit (Black/Light Blue wire). If resistance less than 5 ohms, repair signal circuit short to ground circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.

TEST TC-27A - THROTTLE POSITION SENSOR VOLTAGE HIGH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition on. Using scan tool, read Throttle Position (TP) sensor voltage. If voltage is more than 4.5 volts, go to step 6). If voltage is 4.5 volts or less, go to next step.
2. While monitoring TP sensor voltage, slowly open and close throttle. If voltage does not change smoothly, replace TP sensor and perform TEST VER-2A. If voltage changes smoothly, go to next step.
3. With throttle at closed position, wiggle wiring harness and connector going to TP sensor on throttle while monitoring voltage. If voltage changes while wiggling wiring harness, repair wiring harness and connector as necessary and perform TEST VER-2A. If voltage does not change while wiggling wiring harness, go to next step.
4. Condition required to set DTC is not present at this time. THROTTLE POSITION SENSOR VOLTAGE HIGH DTC sets in Powertrain Control Module (PCM) if TP sensor voltage at PCM is more than 4.5 volts for .704 second. Possible causes are: open TP sensor wiring or defective TP sensor. Go to next step.
5. Check for defective wiring/connections at TP sensor and PCM. Repair wiring/connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
6. Disconnect TP sensor connector. Connect a jumper wire between TP sensor connector, signal circuit (Orange/Dark Blue wire) and ground circuit (Black/Light Blue). Go to next step.
7. Using scan tool, read TP sensor voltage. If voltage is less than one volt, replace TP sensor and perform TEST VER-2A. If voltage is one volt or more, go to next step.
8. Remove jumper wire and reconnect jumper wire between TP sensor connector, signal circuit (Orange/Dark Blue wire) and engine ground. Go to next step.
9. Using scan tool, read TP sensor voltage. If voltage less than one volt, repair open ground circuit and perform TEST VER-2A. If voltage is one volt or more, go to next step.
10. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
11. Using an external ohmmeter, check resistance of signal circuit (Orange/Dark Blue wire) between TP sensor connector and PCM Black connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A. If resistance is 5 ohms or more, repair open signal circuit and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-27A to TEST TC-30A. No tests have been omitted.

TEST TC-30A - ECT SENSOR VOLTAGE TOO LOW

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read Engine Coolant Temperature (ECT) sensor voltage. If voltage is less than 0.5 volt, go to step 5). If voltage is 0.5 volt or more, go to next step.
2. Wiggle wiring harness and connector going to ECT sensor while monitoring ECT sensor voltage. If voltage changes while wiggling wiring harness, repair wiring harness and connector as necessary and perform TEST VER-2A. If voltage does not change while wiggling wiring harness, go to next step.
3. Condition required to set DTC is not present at this time. ECT SENSOR VOLTAGE TOO LOW DTC sets if ECT sensor voltage at Powertrain Control Module (PCM) is less than 0.5 volt for more than 3 seconds. Possible causes are: defective connections or shorted ECT sensor wiring, defective ECT sensor or PCM. Go to next step.
4. Inspect all related wiring and connectors. Repair defective wiring and connections as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
5. Disconnect ECT sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Using scan tool, read ECT sensor voltage. If voltage is more than 4 volts, replace ECT sensor and perform TEST VER-2A. If voltage is 4 volts or less, go to next step.
7. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
8. Using scan tool in ohmmeter mode, check resistance of ECT sensor connector, signal circuit (Tan/Black wire). If resistance is less than 5 ohms, repair short to ground in signal circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
9. Using external ohmmeter, check resistance between ECT sensor connector, signal circuit (Tan/Black wire) and ground circuit (Black/Light Blue wire). If resistance is less than 5 ohms, repair signal circuit for a short to ground circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.

TEST TC-31A - ECT SENSOR VOLTAGE TOO HIGH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

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 4.5 volts or less, go to next step.
2. Wiggle wiring harness and connector going to ECT sensor while monitoring ECT sensor voltage. If voltage changes while wiggling wiring harness, repair wiring harness and connector as necessary and perform TEST VER-2A. If voltage does not change while wiggling wiring harness, go to next step.
3. Conditions required to set DTC is not present at this time. ECT SENSOR VOLTAGE TOO HIGH DTC sets if ECT sensor voltage at Powertrain Control Module (PCM) is more than 4.5 volts for more than 3 seconds. Possible causes are: defective connections or open ECT sensor wiring, defective ECT sensor or PCM. Go to next step.
4. Inspect all related wiring and connectors. Repair defective wiring and connections as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
5. Disconnect ECT sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Connect a jumper wire between ECT sensor connector, signal circuit (Tan/Black wire) and ground circuit (Black/Light Blue wire). Go to next step.
7. Using scan tool, read ECT sensor voltage. If voltage is less than one volt, replace ECT sensor and perform TEST VER-2A. If voltage is one volt or more, go to next step.
8. Remove jumper wire from ECT sensor connector. Reconnect jumper wire between ECT sensor connector, signal circuit (Tan/Black wire) and engine ground. Go to next step.
9. Using scan tool, read ECT sensor voltage. If voltage less than one volt, repair open ground circuit and perform TEST VER-2A. If voltage is one volt or more, go to next step.
10. Turn ignition off. Disconnect PCM connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
11. Using an external ohmmeter, check resistance of signal circuit (Tan/Black wire) between ECT sensor connector and PCM Black connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A. If resistance is 5 ohms or more, repair open signal circuit and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-31A to TEST TC-35A. No tests have been omitted.

TEST TC-35A - NO VEHICLE SPEED SENSOR SIGNAL

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Raise and support vehicle so drive wheels are free to rotate. Start engine. Using scan tool, read Vehicle Speed Sensor (VSS) signal. Place transmission in any forward gear. If scan tool displays zero MPH, go to step 4). If scan tool displays more than zero MPH, go to next step.
2. Condition required to set DTC is not present at this time. NO VEHICLE SPEED SENSOR SIGNAL DTC sets if no VSS signal is received at Powertrain Control Module (PCM) for more than 11 seconds. Possible causes are: open or shorted VSS wiring, defective connections, defective speedometer drive gear, defective VSS or PCM. Go to next step.
3. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . VSS test okay at this time. Perform TEST VER-2A.
4. Ensure VSS is properly installed. Correct VSS installation as necessary and perform TEST VER-2A. If VSS is properly installed, go to next step.
5. Turn ignition off. Disconnect VSS connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Turn ignition on. Using scan tool in voltmeter mode, check voltage on VSS connector, 5-volt supply circuit (Orange wire). If voltage is 4 volts or less, repair open 5-volt supply circuit and perform TEST VER-2A. If voltage is more than 4 volts, go to next step.
7. Check voltage on VSS connector, signal circuit (White/Orange wire). If voltage is 4 volts or less, go to step 10). If voltage is more than 4 volts, go to next step.
8. Connect a jumper wire to VSS connector, signal circuit (White/Orange wire). Using scan tool, read VSS signal. Momentarily touch remaining end of jumper wire to VSS connector, ground circuit (Black/Light Blue wire) while monitoring VSS signal. If scan tool displays zero MPH, perform TEST TC-35B. If scan tool displays more than zero MPH, go to step next step.
9. Remove VSS. Inspect speedometer pinion gear for damage. Repair pinion gear as necessary and perform TEST VER-2A. If pinion gear is okay, replace VSS and perform TEST VER-2A.
10. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
11. Using an external ohmmeter, check resistance of signal circuit (White/Orange wire) between VSS connector and PCM White connector. If resistance is 5 ohms or more, repair open signal circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
12. Using scan tool in ohmmeter mode, check resistance of PCM White connector, signal circuit (White/Orange wire). If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
13. If vehicle is not equipped with Daytime Running Lamps (DRL), repair short to ground in signal circuit (White/Orange wire) and perform TEST VER-2A. If vehicle is equipped with DRL, disconnect DRL module connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
14. Using scan tool in ohmmeter mode, check resistance of PCM White connector, signal circuit (White/Orange wire). If resistance is less than 5 ohms, replace DRL module and perform TEST VER-2A. If resistance is 5 ohms or more, repair short to ground in signal circuit and perform TEST VER-2A.

TEST TC-35B - NO VEHICLE SPEED SENSOR SIGNAL

Note. Perform TEST TC-35A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Using scan tool in ohmmeter mode, check resistance of Vehicle Speed Sensor (VSS) connector, ground circuit (Black/Light Blue wire). If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
2. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
3. Using an external ohmmeter, check resistance of signal circuit (White/Orange wire) between VSS connector and PCM White connector. If resistance is less than 5 ohms, repair open signal circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.

TEST TC-36A - MAP SENSOR VOLTAGE TOO LOW OR NO 5 VOLTS TO MAP

SENSOR

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Start engine and allow it to idle. Using scan tool, read Manifold Absolute Pressure (MAP) sensor voltage. If voltage is less than 1.2 volts, go to step 6). If voltage is 1.2 volts or more, go to next step.
2. Turn engine off. Turn ignition on, with engine off. Using scan tool, read MAP sensor voltage. If voltage is less than 2.35 volts, go to step 6). If voltage is 2.35 volts or more, go to next step.
3. Wiggle wiring harness and connector going to MAP sensor while monitoring MAP sensor voltage. If voltage changes while wiggling wiring harness, repair wiring harness or connector as necessary and perform TEST VER-2A. If voltage does not change while wiggling wiring harness, go to next step.
4. Condition required to set DTC is not present at this time. MAP SENSOR VOLTAGE TOO LOW DTC sets when MAP sensor signal voltage is less than 2.35 volts at start, or less than 0.2 volt for 1.76 seconds with engine running. Possible causes are: open or shorted MAP sensor wiring, defective connections, defective MAP sensor or PCM. Go to next step.
5. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
6. Turn engine off. Turn ignition on. Disconnect MAP sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
7. Using scan tool in voltmeter mode, check voltage on MAP sensor connector, 5-volt supply circuit (Violet/White wire). If voltage is 4.5 volts or less, go to step 12). If voltage is more than 4.5 volts, go to next step.
8. Using scan tool, read MAP sensor voltage. If voltage is 4.5 volts or less, replace MAP sensor and perform TEST VER-2A. If voltage is more than 4.5 volts, go to next step.
9. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
10. Using an external ohmmeter, check resistance between MAP sensor connector, signal circuit (Dark Green/Red wire) and ground circuit (Black/Light Blue wire). If resistance is less than 5 ohms, repair signal circuit for a short to ground circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
11. Using scan tool in ohmmeter mode, check resistance of MAP sensor connector, signal circuit (Dark Green/Red wire). If resistance is less than 5 ohms, repair short to ground in signal circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.
12. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
13. Using an external ohmmeter, check resistance of MAP sensor connector, 5-volt supply circuit (Violet/White wire) between MAP sensor connector and PCM Black connector. If resistance is 5 ohms or more, repair open 5-volt supply circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
14. Check resistance of MAP sensor connector, 5-volt supply circuit (Violet/White wire) between MAP sensor connector and engine ground. If resistance is less than 5 ohms, repair short to ground in 5-volt supply circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.

TEST TC-37A - MAP SENSOR VOLTAGE TOO HIGH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Start engine. Using scan tool, read Manifold Absolute Pressure (MAP) sensor voltage. If voltage is more than 4.6 volts, go to step 5). If voltage is 4.6 volts or less, go to next step.
2. Wiggle wiring harness and connector going to MAP sensor while monitoring MAP sensor voltage. If voltage changes while wigging wiring harness, repair wiring harness or connector as necessary and perform TEST VER-2A. If voltage does not change while wiggling wiring harness, go to next step.
3. Condition required to set DTC is not present at this time. MAP SENSOR VOLTAGE TOO HIGH DTC sets if MAP sensor voltage is more than 4.6 volts at engine start or with engine running for 1.76 seconds. Possible causes are: open or shorted MAP sensor wiring, defective connections, defective MAP sensor or PCM. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
5. Turn engine off. Turn ignition on. Disconnect MAP sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Using scan tool in voltmeter mode, check voltage on MAP sensor connector, signal circuit . If voltage is more than 5.5 volts, repair short to battery voltage in signal circuit and perform TEST VER-2A. If voltage is 5.5 volts or less, go to next step.
7. Connect a jumper wire between MAP sensor connector, signal circuit (Dark Green/Red wire) and ground circuit (Black/Light Blue wire). Crank engine while using scan tool to monitor MAP sensor voltage. If voltage is less than one volt, replace MAP sensor and perform TEST VER-2A. If voltage is one volt or more, go to next step.
8. Remove jumper wire from MAP sensor connector, ground circuit (Black/Light Blue wire) and reconnect jumper wire to engine ground. Read MAP sensor voltage. If voltage is less than one volt, repair open in ground circuit and perform TEST VER-2A. If voltage is one volt or more, go to next step.
9. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
10. Using an external ohmmeter, check resistance of Map sensor connector, signal circuit (Dark Green/Red wire) between MAP sensor connector and PCM Black connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A. If resistance is 5 ohms or more, repair open signal circuit and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-37A to TEST TC-39A. No tests have been omitted.

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

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ign on with engine off. Read DTCs with scan tool. If scan tool displays MAP SENSOR VOLTAGE TOO LOW, perform TEST TC-36A. If scan tool does not display MAP SENSOR VOLTAGE TOO LOW, go to next step.
2. Using scan tool, clear DTCs. Start engine and allow it to idle for 30 seconds. Using scan tool, read DTCs. If scan tool displays NO CHANGE IN MAP FROM START TO RUN, go to step 8). If scan tool does not display NO CHANGE IN MAP FROM START TO RUN, go to next step.
3. With engine idling, use scan tool to increase engine speed to 1500 RPM and read MAP sensor voltage while wiggling wiring harness and connectors from PCM to MAP sensor. If engine stalls or voltage becomes erratic while wiggling wiring harness, repair wiring harness and connectors as necessary and perform TEST VER-2A. If engine does not stall and voltage does not become erratic while wiggling wiring harness, go to next step.
4. While monitoring engine vacuum on scan tool display, snap throttle open and closed several times. If scan tool displays rapid vacuum decrease to less than one in. Hg, go to next step. If vacuum does not decrease rapidly to less than one in. Hg, go to step 7).
5. Condition required to set DTC is not present at this time. NO CHANGE IN MAP FROM START TO RUN DTC sets if Powertrain Control Module (PCM) detects too small a difference between barometric pressure at ignition and manifold vacuum with engine running for 1.72 seconds. Possible causes are: restricted or leaking vacuum supply to MAP sensor, defective MAP sensor wiring or connector, defective MAP sensor or PCM.
6. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
7. Remove MAP sensor. Inspect intake manifold, throttle and MAP sensor vacuum ports for vacuum restriction. If restriction exists, repair as necessary and perform TEST VER-2A. If no restriction exists, replace MAP sensor and perform TEST VER-2A.
8. Turn ignition on with engine off. Remove MAP sensor. Inspect intake manifold, throttle and MAP sensor vacuum ports for vacuum restriction. If restriction exists, repair as necessary and perform TEST VER-2A. If no restriction exists, go to next step.
9. Using scan tool in voltmeter mode, check voltage on MAP sensor connector, 5-volt supply circuit (Violet/White wire). If voltage is 4.5 volts or less, repair open 5-volt supply circuit and perform TEST VER-2A. If voltage is more than 4.5 volts, replace MAP sensor and perform TEST VER-2A.

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

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Attempt to start engine while using scan tool to monitor engine speed. If scan tool does not display more than 50 RPM when attempting to start engine, go to step 6). If scan tool displays more than 50 RPM when attempting to start engine, go to next step.
2. Condition required to set DTC is not present at this time. NO CRANK REFERENCE SIGNAL DTC sets when no Crankshaft Position (CKP) sensor signal is received by Powertrain Control Module (PCM) during engine cranking, Camshaft Position (CMP) sensor signal is present with no CKP sensor signal, or no CMP sensor signal is present when CKP sensor signal is present. Possible causes are: open or shorted sensor wiring, defective connections, improper CKP or CMP sensor clearance, defective CKP or CMP sensor and components, damaged flywheel or crankshaft pulse ring, broken timing belt or defective PCM. Go to next step.
3. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, go to next step.
4. Start engine and allow it to idle. Wiggle wiring harness from PCM to CMP sensor and CKP sensor. If engine misfires or stalls while wiggling wiring harness, repair wiring harness as necessary and perform TEST VER-2A. If engine does not misfire or stall while wiggling wiring harness, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
5. Turn ignition off. Disconnect Crankshaft Position (CKP) sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Turn ignition on. Using scan tool in voltmeter mode, check voltage on CKP sensor connector, 5-volt supply circuit (Violet/White wire). If voltage is 4.5 volts or less, go to step 11). If voltage is more than 4.5 volts, go to next step.
7. Turn ignition off. Using scan tool in ohmmeter mode, check resistance of CKP sensor connector, ground circuit (Black/Light Blue wire). If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
8. Disconnect Powertrain Control Module (PCM) Black connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
9. Using an external ohmmeter, check resistance of signal circuit (Gray/Black wire) between CKP sensor connector and PCM Black connector. If resistance is 5 ohms or more, repair open signal circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
10. Using scan tool in ohmmeter mode, check resistance of PCM Black connector, CKP signal circuit (Gray/Black wire). If resistance is 5 ohms or more, replace CKP sensor and perform TEST VER-2A. If resistance less than 5 ohms, repair short to ground in signal circuit and perform TEST VER-2A.
11. Turn ignition off. Disconnect Powertrain Control Module (PCM) Black connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
12. Using an external ohmmeter, check resistance of 5-volt supply circuit (Violet/White wire) between CKP sensor connector and PCM Black connector. If resistance is 5 ohms or more, repair open 5-volt supply circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
13. Using scan tool in ohmmeter mode, check resistance of PCM Black connector, CKP 5-volt supply circuit (Violet/White wire). If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A. If resistance is less than 5 ohms, repair short to ground in 5-volt supply circuit and perform TEST VER-2A.

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

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read DTCs. If scan tool displays AUTO SHUTDOWN RELAY CONTROL CIRCUIT, perform TEST TC-10A. If scan tool does not display AUTO SHUTDOWN RELAY CONTROL CIRCUIT, go to next step.
2. Using scan tool in voltmeter mode, backprobe Powertrain Control Module (PCM) Gray connector, Auto Shutdown (ASD) relay output circuit (Dark Green/Orange wire). Go to next step.
3. Using scan tool, actuate ASD relay. If voltage is 10 volts or less when ASD relay is energized, go to step 7). If voltage is more than 10 volts when ASD relay is energized, go to next step.
4. Condition required to set DTC is not present at this time. NO ASD RELAY OUTPUT VOLTAGE AT PCM DTC sets if no voltage is sensed at PCM when ASD relay is energized. Possible causes are: defective ASD wiring circuit, defective ASD relay or PCM. Go to next step.
5. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, go to next step.
6. Start engine and allow it to idle. Wiggle wiring harness from PCM to ASD relay while monitoring scan tool. If voltage varies while wiggling wiring harness, repair wiring harness as necessary and perform TEST VER-2A. If voltage does not vary while wiggling wiring harness, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
7. Attempt to start engine. If engine starts, go to step 13). If engine does not start, go to next step.
8. Remove ASD relay. Inspect ASD relay connector for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
9. Using scan tool in voltmeter mode, check voltage on ASD relay connector, fused B+ circuit (Red/White wire). If voltage is 10 volts or less, repair open fused B+ circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step.
10. Install a substitute ASD relay. Attempt to start engine. If engine starts, replace original ASD relay and perform TEST VER-2A. If engine does not start, go to next step.
11. Turn ignition off. Disconnect PCM Gray connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
12. Using an external ohmmeter, check resistance of ASD relay output circuit (Dark Green/Orange wire) between ASD relay connector and PCM Gray connector. If resistance is more than 5 ohms, repair open ASD relay output circuit and perform TEST VER-2A. If resistance is 5 ohms or less, replace PCM and perform TEST VER-2A.
13. Turn ignition off. Disconnect PCM Gray connector and remove ASD relay. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
14. Using an external ohmmeter, check resistance of ASD relay output circuit (Dark Green/Orange wire) between ASD relay connector and PCM Gray connector. If resistance is more than 5 ohms, repair open ASD relay output circuit and perform TEST VER-2A. If resistance is 5 ohms or less, replace PCM and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-44A to TEST TC-46A. No tests have been omitted.

TEST TC-46A - EGR SYSTEM FAILURE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Start engine and allow it to idle. Using scan tool in EGR SYSTEM TEST mode, press No. 2 on scan tool key pad to block EGR flow. Monitor Intake Air Temperature (IAT) sensor temperature until it stabilizes. Go to next step.
2. Press No. 3 on scan tool key pad to actuate EGR solenoid, and allow EGR to flow. Monitor IAT temperature sensor. If temperature does not increase after EGR is actuated, go to step 5). If temperature increases after EGR is actuated, go to next step.
3. Condition required to set DTC is not present at this time. EGR SYSTEM FAILURE DTC sets if PCM energizes EGR solenoid and no significant change in IAT occurs. Possible causes are: open or blocked EGR valve vacuum supply, blocked exhaust transfer tube to intake manifold, failed EGR valve, failed PCM, failed connectors and terminals, or failed EGR solenoid or transducer. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If connectors and terminals are okay, test is complete. Perform TEST VER-2A.
5. Disconnect vacuum supply hose EGR solenoid. If vacuum does not exist in supply hose, repair vacuum supply as necessary and perform TEST VER-2A. If vacuum exists, go to next step.
6. Reconnect vacuum supply hose. Disconnect EGR solenoid-to-EGR valve vacuum supply hose at EGR solenoid. Ensure EGR solenoid is still actuating. If EGR solenoid is not allowing vacuum to pass through, replace EGR solenoid and perform TEST VER-2A. If vacuum is passing through, go to next step.
7. Reconnect vacuum supply hose at EGR solenoid and disconnect it at EGR valve. If vacuum does not exist in hose, repair vacuum hose or check valve as necessary and perform TEST VER-2A. If vacuum exists, go to next step.
8. Remove EGR valve. Connect a vacuum pump to EGR valve. Slowly apply 10 in. Hg while observing EGR valve poppet. If poppet does not start to open at 10 in. Hg, replace EGR valve and perform TEST VER-2A. If poppet opens, inspect EGR tube, and intake and exhaust manifolds for carbon build-up and repair as necessary. Retest EGR system.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-46A to TEST TC-48A. No tests have been omitted.

TEST TC-48A - PCM FAILURE SRI MILE NOT STORED

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, perform SRI MEMORY TEST. If scan tool displays WRITE FAILURE, replace Powertrain Control Module (PCM) and perform TEST VER-2A. If scan tool does not display WRITE FAILURE, go to next step.
2. If scan tool displays WRITE REFUSED, go to step 3). If scan tool does not display WRITE REFUSED, but it displays SRI MILEAGE INVALID, update mileage, repeat SRI MEMORY TEST, perform TEST VER-2A. If scan tool does not display WRITE REFUSED or SRI MILEAGE INVALID, go to step 4).
3. Using scan tool, repeat SRI MEMORY TEST. If scan tool displays WRITE REFUSED, replace PCM and perform TEST VER-2A. If scan tool does not display WRITE REFUSED, and it displays SRI MILEAGE INVALID, update mileage, repeat SRI MEMORY TEST, perform TEST VER-2A. If scan tool does not display SRI MILEAGE INVALID, go to next step.
4. Compare SRI mileage stored with mileage on odometer in instrument panel. If mileage is the same, repeat SRI MEMORY TEST, and perform TEST VER-2A. If mileage is not the same, update mileage and repeat SRI MEMORY TEST, and perform TEST VER-2A.

TEST TC-49A - PCM FAILURE EEPROM WRITE DENIED

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, perform SRI MEMORY TEST. If scan tool does not display WRITE REFUSED, Test is complete. Perform TEST VER-2A. If scan tool displays WRITE REFUSED, go to next step.
2. Using scan tool, repeat SRI MEMORY TEST. If scan tool displays WRITE REFUSED, replace PCM, perform TEST VER-2A. If scan tool does not display WRITE REFUSED, test complete. Perform TEST VER-2A.

TEST TC-50A - TRANS 3-4 SOLENOID/TRANS RELAY CKTS

Note. Test applies to vehicle equipped with automatic transmission only.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
2. Remove transmission relay. Inspect transmission relay connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
3. Turn ignition on. Using an external voltmeter, check voltage on PCM White connector, 3-4 solenoid circuit (Orange/White wire). If voltage is more than one volt, go to step 7). If voltage is one volt or less, go to next step.
4. Turn ignition off. Using an external ohmmeter, connect one lead to transmission relay connector, transmission control relay output circuit (Light Blue wire). Go to next step.
5. Connect other lead to PCM White connector, 3-4 shift solenoid control circuit (Orange/White wire). If resistance is 40 ohms or more, perform TEST TC-50B. If resistance is less than 26 ohms, perform TEST TC-50C. If resistance is 26-40 ohms, go to next step.
6. Check resistance of 3-4 solenoid circuit (Orange/White wire) between PCM White connector and engine ground. If resistance is less than 5 ohms, perform TEST TC-50D. If resistance is 5 ohms or more, perform TEST TC-50E.
7. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step. NOTE: Transmission relay is turned off by Powertrain Control Module (PCM) after 3 seconds with ignition switch on and engine off.
8. Turn ignition on. Using scan tool in voltmeter mode, check voltage on transmission solenoid connector, 3-4 solenoid circuit (Orange/White wire). If voltage is more than one volt, repair short to voltage in 3-4 solenoid circuit and perform TEST VER-2A. If voltage is one volt or less, go to next step.
9. Check voltage on transmission solenoid connector, transmission relay output circuit (Light Blue wire). If voltage is more than one volt, repair short to voltage in transmission relay output circuit and perform TEST VER-2A. If voltage is one volt or less, replace transmission solenoid pack and perform TEST VER-2A.

TEST TC-50B - TRANS 3-4 SOLENOID/TRANS RELAY CKTS

Note. Perform TEST TC-50A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of 3-4 shift solenoid control circuit (Orange/White) between PCM White connector and transmission solenoid connector. If resistance 5 ohms or more, repair open 3-4 solenoid control circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
3. Check resistance of transmission relay output circuit (Light Blue wire) between transmission solenoid connector and transmission control relay connector. If resistance is more than 5 ohms, repair open 3-4 shift solenoid circuit (Orange/White wire) and perform TEST VER-2A. If resistance is 5 ohms or more, replace transmission solenoid pack and perform TEST VER-2A.

TEST TC-50C - TRANS 3-4 SOLENOID/TRANS RELAY CKTS

Note. Perform TEST TC-50A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
2. Using an external ohmmeter, connect one lead to transmission relay connector, transmission control relay output circuit (Light Blue wire). Go to next step.
3. Connect other lead to PCM White connector, 3-4 shift solenoid control circuit (Orange/White wire). If resistance less than 5 ohms, repair transmission control relay output circuit for a short to 3-4 shift solenoid control circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace transmission solenoid pack and wiring harness, and perform TEST VER-2A.

TEST TC-50D - TRANS 3-4 SOLENOID/TRANS RELAY CKTS

Note. Perform TEST TC-50A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance between PCM White connector, 3-4 shift solenoid circuit (Orange/White wire) and engine ground. If resistance is less than 5 ohms, repair short to ground in 3-4 shift solenoid circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
3. Check resistance between transmission solenoid connector, transmission control relay output circuit (Light Blue wire) and engine ground. If resistance is less than 5 ohms, repair short to ground in transmission control relay output circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace transmission solenoid pack and perform TEST VER-2A.

TEST TC-50E - TRANS 3-4 SOLENOID/TRANS RELAY CKTS

Note. Perform TEST TC-50A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Condition required to set DTC is not present at this time. 3-4 SHIFT SOLENOID CIRCUIT DTC sets if an open or shorted circuit exists in 3-4 shift solenoid circuit. Possible causes are: open or shorted wiring to 3-4 shift solenoid, open fused ignition switch output circuit, defective connector terminals, or defective 3-4 shift solenoid. Go to next step.
2. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, go to next step.
3. Using scan tool, actuate 3-4 shift solenoid and read DTCs. Wiggle wiring harness from 3-4 shift solenoid to PCM and note if 3-4 SHIFT SOLENOID DTC resets. If DTC resets, repair wiring harness as necessary and perform TEST VER-2A. If DTC does not reset, see procedures under «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . If procedures in INACTIVE DTC CONDITION pass, replace PCM and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-50E to TEST TC-55A. No tests have been omitted.

TEST TC-55A - INJECTOR #9 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect injector No. 9 electrical connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance across injector No. 9 terminals. If resistance is not 10-16 ohms, replace injector and perform TEST VER-2A. If resistance is 10-16 ohms, go to next step.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on injector No. 9 connector, ASD relay output circuit (Dark Green/Orange wire). If voltage does not cycle from high voltage to low voltage, repair open ASD relay output circuit and perform TEST VER-2A. If voltage cycles from high voltage to low voltage, go to next step.
4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of PCM White connector, injector No. 9 driver circuit (Tan wire). If resistance is less than 5 ohms, repair short to ground in injector No. 9 driver circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
6. Using an external ohmmeter, check resistance of injector No. 9 driver circuit (Tan wire) between injector No. 9 connector and PCM White connector. If resistance is 5 ohms or more, repair open injector No. 9 driver circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

TEST TC-56A - INJECTOR #10 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect injector No. 10 electrical connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance across injector No. 10 terminals. If resistance is not 10-16 ohms, replace injector and perform TEST VER-2A. If resistance is 10-16 ohms, go to next step.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on injector No. 10 connector, ASD relay output circuit (Dark Green/Orange wire). If voltage does not cycle from high voltage to low voltage, repair open ASD relay output circuit and perform TEST VER-2A. If voltage cycles from high voltage to low voltage, go to next step.
4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of PCM White connector, injector No. 10 driver circuit (White/Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in injector No. 10 driver circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
6. Using an external ohmmeter, check resistance of injector No. 10 driver circuit (White/Dark Blue wire) between injector No. 10 connector and PCM White connector. If resistance is 5 ohms or more, repair open injector No. 10 driver circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

TEST TC-57A - INTAKE AIR TEMPERATURE SENSOR VOLTAGE LOW

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read Intake Air Temperature (IAT) sensor voltage. If voltage is less than 0.5 volt, go to step 5). If voltage is 0.5 volt or more, go to next step.
2. Wiggle wiring harness and connector from Powertrain Control Module (PCM) to IAT sensor while monitoring IAT sensor voltage. If voltage changes while wiggling wiring harness, repair wiring harness as necessary and perform TEST VER-2A. If voltage does not change while wiggling wiring harness, go to next step.
3. Condition required to set DTC is not present at this time. INTAKE AIR TEMPERATURE SENSOR VOLTAGE LOW DTC sets when IAT sensor voltage at PCM is less than 0.5 volt. Possible causes are: shorted IAT sensor wiring, defective connections, defective IAT sensor or PCM. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
5. Disconnect IAT sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Using scan tool, read IAT sensor voltage. If voltage is more than 4 volts, replace IAT sensor and perform TEST VER-2A. If voltage is 4 volts or less, go to next step.
7. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
8. Using an external ohmmeter, check resistance between IAT sensor connector, sensor signal circuit (Black/Red wire) and ground circuit (Black/Light Blue wire). If resistance less than 5 ohms, repair signal circuit short to ground circuit, perform TEST VER-2A. If resistance is more than 5 ohms, go to next step.
9. Reconnect PCM connectors. Using scan tool in ohmmeter mode, check resistance of IAT sensor connector, sensor signal circuit (Black/Red wire). If resistance is less than 5 ohms, repair short to ground in sensor signal circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.

TEST TC-58A - INTAKE AIR TEMPERATURE SENSOR VOLTAGE HIGH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read Intake Air Temperature (IAT) sensor voltage. If voltage is more than 4.5 volts, go to step 5). If voltage is 4.5 volts or less, go to next step.
2. Wiggle wiring harness and connector from Powertrain Control Module (PCM) to IAT sensor while monitoring IAT sensor voltage. If voltage changes while wiggling wiring harness, repair wiring harness as necessary and perform TEST VER-2A. If voltage does not change while wiggling wiring harness, go to next step.
3. Condition required to set DTC is not present at this time. INTAKE AIR TEMPERATURE SENSOR VOLTAGE HIGH DTC sets when IAT sensor voltage at PCM is more than 4.5 volts. Possible causes are: open IAT sensor wiring, defective connections, defective IAT sensor or PCM. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
5. Disconnect IAT sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Connect a jumper wire across IAT sensor connector, sensor signal circuit (Black/Red wire) and sensor ground circuit (Black/Light Blue wire). Go to next step.
7. Using scan tool, read IAT sensor voltage. If voltage is less than one volt, replace IAT sensor and perform TEST VER-2A. If voltage is one volt or more, go to next step.
8. Move jumper wire from IAT sensor connector, ground circuit (Black/Light Blue wire) to engine ground. Read IAT sensor voltage. If voltage is less than one volt, repair open sensor ground circuit and perform TEST VER-2A. If voltage is one volt or more, go to next step.
9. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
10. Using an external ohmmeter, check resistance of sensor signal circuit (Black/Red wire) between IAT sensor connector and PCM Black connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A. If resistance is 5 ohms or more, repair open sensor signal circuit and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-58A to TEST TC-61A. No tests have been omitted.

TEST TC-61A - INJECTOR #4 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect injector No. 4 electrical connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance across injector No. 4 terminals. If resistance is not 10-16 ohms, replace injector and perform TEST VER-2A. If resistance is 10-16 ohms, go to next step.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on injector No. 4 connector, ASD relay output circuit (Dark Green/Orange wire). If voltage does not cycle from high voltage to low voltage, repair open ASD relay output circuit and perform TEST VER-2A. If voltage cycles from high voltage to low voltage, go to next step.
4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of PCM White connector, injector No. 4 driver circuit (Light Blue/Brown wire). If resistance is less than 5 ohms, repair short to ground in injector No. 4 driver circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
6. Using an external ohmmeter, check resistance of injector No. 4 driver circuit (Light Blue/Brown wire) between injector No. 4 connector and PCM White connector. If resistance is 5 ohms or more, repair open injector No. 4 driver circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

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

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Warm engine to normal operating temperature. Wait 4 minutes with engine running. Using scan tool, read left/upstream Oxygen Sensor (O2S) voltage. If voltage is more than 1.5 volts, go to step 5). If voltage is 1.5 volts or less, go to next step.
2. Wiggle wiring harness and connector at left/upstream O2S while monitoring left/upstream O2S voltage. If voltage increases to more than 1.5 volts at any time while wiggling wiring harness, repair wiring harness and connector for intermittent short to voltage or open circuit as necessary and perform TEST VER-2A. If voltage does not increase to more than 1.5 volts at any time, go to next step.
3. Conditions required to set DTC is not present at this time. LEFT/UPSTREAM O2S SHORTED TO VOLTAGE DTC sets if left/upstream O2S voltage is more than 1.5 volts. Possible causes are: left/upstream O2S wiring shorted to voltage, dirt or moisture in connectors causing voltage tracking, defective connections, defective left/upstream O2S or PCM. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, test is complete. Perform TEST VER-2A.
5. Disconnect left/upstream O2S connector. Inspect connector/terminals for damage. Repair connector/terminals as necessary and perform TEST VER-2A If connector and terminals are okay, go to next step.
6. Using scan tool, read left/upstream O2S voltage. If voltage is more than 1.5 volts, repair short to voltage in left/upstream O2S connector, signal circuit (Black/Dark Green wire) and perform TEST VER-2A. If voltage is 1.5 volts or less, perform TEST TC-103A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-62A to TEST TC-66A. No tests have been omitted.

TEST TC-66A - RIGHT O2 SENSOR SHORTED TO VOLTAGE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Warm engine to normal operating temperature. Wait 4 minutes with engine running. Using scan tool, read right Oxygen Sensor (O2S) voltage. If voltage is more than 1.5 volts, go to step 5). If voltage is 1.5 volts or less, go to next step.
2. Wiggle wiring harness and connector at right O2S while monitoring right O2S voltage. If voltage increases to more than 1.5 volts at any time while wiggling wiring harness, repair wiring harness and connector for intermittent short to voltage or open circuit as necessary and perform TEST VER-2A. If voltage does not increase to more than 1.5 volts at any time, go to next step.
3. Condition required to set DTC is not present at this time. RIGHT O2S SHORTED TO VOLTAGE DTC sets if right O2S voltage is more than 1.5 volts. Possible causes are: right O2S wiring shorted to voltage, dirt or moisture in connectors causing voltage tracking, defective connections, defective right O2S or PCM. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If connectors and wiring are okay, test is complete. Perform TEST VER-2A.
5. Disconnect right O2S connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
6. Using scan tool, read right O2S voltage. If voltage is more than 1.5 volts, replace right O2S and perform TEST VER-2A. If voltage is 1.5 volts or less, go to next step.
7. Disconnect left O2S connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
8. Using scan tool, read left O2S voltage. If voltage is more than 4.98 volts, replace left/upstream O2S and perform TEST VER-2A. If resistance is 4.97 volts or less, go to next step.
9. Turn ignition off. Disconnect Powertrain Control Module (PCM) Black connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
10. Turn ignition on. Using an external voltmeter, check voltage between each O2S connector, ground circuit (Black/Light Blue wire) and signal circuit (Tan/Red wire on center O2S, if equipped; Tan/White wire on left/upstream O2S; Black/Dark Green wire on right/upstream O2S; Orange/Black wire on post-catalyst O2S, if equipped). If voltage on any circuit more than 1.5 volts, repair short to voltage in circuits and perform TEST VER-2A. If voltage on all circuits is 1.5 volts or less, replace PCM and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-66A to TEST TC-69A. No tests have been omitted.

TEST TC-69A - INJECTOR #5 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect injector No. 5 electrical connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance across injector No. 5 terminals. If resistance is not 10-16 ohms, replace injector and perform TEST VER-2A. If resistance is 10-16 ohms, go to next step.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on injector No. 5 connector, ASD relay output circuit (Dark Green/Orange wire). If voltage does not cycle from high voltage to low voltage, repair open ASD relay output circuit and perform TEST VER-2A. If voltage cycles from high voltage to low voltage, go to next step.
4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of PCM White connector, injector No. 5 driver circuit (Gray wire). If resistance is less than 5 ohms, repair short to ground in injector No. 5 driver circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
6. Using an external ohmmeter, check resistance of injector No. 5 driver circuit (Gray wire) between injector No. 5 connector and PCM White connector. If resistance is 5 ohms or more, repair open injector No. 5 driver circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

TEST TC-70A - INJECTOR #6 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect injector No. 6 electrical connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance across injector No. 6 terminals. If resistance is not 10-16 ohms, replace injector and perform TEST VER-2A. If resistance is 10-16 ohms, go to next step.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on injector No. 6 connector, ASD relay output circuit (Dark Green/Orange wire). If voltage does not cycle from high voltage to low voltage, repair open ASD relay output circuit and perform TEST VER-2A. If voltage cycles from high voltage to low voltage, go to next step.
4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of PCM White connector, injector No. 6 driver circuit (Brown/Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in injector No. 6 driver circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
6. Using an external ohmmeter, check resistance of injector No. 6 driver circuit (Brown/Dark Blue wire) between injector No. 6 connector and PCM White connector. If resistance is 5 ohms or more, repair open injector No. 6 driver circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-70A to TEST TC-74A. No tests have been omitted.

TEST TC-74A - TRANS TEMP SENSOR VOLTAGE TOO LOW

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read Transmission Temperature (TRANS TEMP) sensor voltage. If voltage is less than 1.5 volt, go to step 5). If voltage is 1.5 volt or more, go to next step.
2. Wiggle wiring harness and connector from Powertrain Control Module (PCM) to TRANS TEMP sensor while monitoring TRANS TEMP sensor voltage. If voltage changes while wiggling wiring harness, repair wiring harness as necessary and perform TEST VER-2A. If voltage does not change while wiggling wiring harness, go to next step.
3. Condition required to set DTC is not present at this time. TRANS TEMP SENSOR VOLTAGE LOW DTC sets when TRANS TEMP sensor voltage at PCM is less than 1.55 volts for 2.2 seconds. Possible causes are: shorted TRANS TEMP sensor wiring, defective connections, defective TRANS TEMP sensor or PCM. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
5. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Using scan tool, read TRANS TEMP sensor voltage. If voltage is more than 4.5 volts, perform TEST TC-75A. If voltage is 4.5 volts or less, go to next step.
7. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
8. Using an external ohmmeter, check resistance between transmission solenoid connector, TRANS TEMP sensor signal circuit (Gray/Black wire) and ground circuit (Black/Light Blue wire). If resistance is less than 5 ohms, repair signal circuit shorted to ground circuit and perform TEST VER-2A. If resistance is more than 5 ohms, go to next step.
9. Check resistance between transmission solenoid connector, signal TRANS TEMP signal circuit (Gray/Black wire) and engine ground. If resistance is less than 5 ohms, repair short to ground in sensor signal circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.

TEST TC-75A - TRANS TEMP SENSOR VOLTAGE TOO HIGH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read Transmission Temperature (TRANS TEMP) sensor voltage. If voltage is more than 4 volts, go to step 5). If voltage is 4 volts or less, go to next step.
2. Wiggle wiring harness and connector from Powertrain Control Module (PCM) to TRANS TEMP sensor while monitoring TRANS TEMP sensor voltage. If voltage changes while wiggling wiring harness, repair wiring harness as necessary and perform TEST VER-2A. If voltage does not change while wiggling wiring harness, go to next step.
3. Condition required to set DTC is not present at this time. TRANS TEMP SENSOR VOLTAGE HIGH DTC sets when TRANS TEMP sensor voltage at PCM is more than 3.76 volts for 2.2 seconds. Possible causes are: open TRANS TEMP sensor wiring, defective connections, defective TRANS TEMP sensor or PCM. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
5. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Connect a jumper wire between transmission solenoid connector, TRANS TEMP sensor signal circuit (Gray/Black wire) and sensor ground circuit (Black/Light Blue wire). Using scan tool, read TRANS TEMP sensor voltage. If voltage is one volt or more, go to step 8). If voltage is less than one volt, go to next step.
7. Reconnect transmission solenoid connector. Remove transmission pan and disconnect TRANS TEMP sensor connector. Connect jumper wire between TRANS TEMP sensor connector, signal circuit (Gray/Black wire) and ground circuit (Black/Light Blue wire). If voltage is less than one volt, replace TRANS TEMP sensor and perform TEST VER-2A. If voltage is one volt or more, replace transmission solenoid and wiring harness, and perform TEST VER-2A.
8. Move jumper wire from TRANS TEMP sensor connector, ground circuit (Black/Light Blue) to engine ground. Read TRANS TEMP sensor voltage. If voltage is less than one volt, repair open sensor ground circuit and perform TEST VER-2A. If voltage is one volt or more, go to next step.
9. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
10. Using an external ohmmeter, check resistance of sensor signal circuit (Gray/Black wire) between transmission solenoid connector and PCM White connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A. If resistance is 5 ohms or more, repair open sensor signal circuit and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-75A to TEST TC-79A. No tests have been omitted.

TEST TC-79A - INJECTOR #7 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect injector No. 7 electrical connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance across injector No. 7 terminals. If resistance is not 10-16 ohms, replace injector and perform TEST VER-2A. If resistance is 10-16 ohms, go to next step.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on injector No. 7 connector, ASD relay output circuit (Dark Green/Orange wire). If voltage does not cycle from high voltage to low voltage, repair open ASD relay output circuit and perform TEST VER-2A. If voltage cycles from high voltage to low voltage, go to next step.
4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of PCM White connector, injector No. 7 driver circuit (Violet wire). If resistance is less than 5 ohms, repair short to ground in injector No. 7 driver circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
6. Using an external ohmmeter, check resistance of injector No. 7 driver circuit (Violet wire) between injector No. 7 connector and PCM White connector. If resistance is 5 ohms or more, repair open injector No. 7 driver circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

TEST TC-80A - INJECTOR #8 CONTROL CIRCUIT

Note. Perform TEST TC-21A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect injector No. 8 electrical connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance across injector No. 8 terminals. If resistance is not 10-16 ohms, replace injector and perform TEST VER-2A. If resistance is 10-16 ohms, go to next step.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on injector No. 8 connector, ASD relay output circuit (Dark Green/Orange wire). If voltage does not cycle from high voltage to low voltage, repair open ASD relay output circuit and perform TEST VER-2A. If voltage cycles from high voltage to low voltage, go to next step.
4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of PCM White connector, injector No. 8 driver circuit (Gray/Light Blue wire). If resistance is less than 5 ohms, repair short to ground in injector No. 8 driver circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
6. Using an external ohmmeter, check resistance of injector No. 8 driver circuit (Gray/Light Blue wire) between injector No. 8 connector and PCM White connector. If resistance is 5 ohms or more, repair open injector No. 8 driver circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

TEST TC-80B - INJECTOR #8 CONTROL CIRCUIT

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect injector No. 8 electrical connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector is okay, go to next step.
2. Using an external ohmmeter, check resistance across injector No. 8 terminals. If resistance is not 3-6 ohms, replace injector and perform TEST VER-2A. If resistance is 3-6 ohms, go to next step.
3. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on injector No. 8 connector, ASD relay output circuit (Dark Green/Orange wire). If voltage does not cycle from high voltage to low voltage, repair open ASD relay output circuit and perform TEST VER-2A. If voltage cycles from high voltage to low voltage, go to next step.
4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of PCM White connector, injector No. 8 driver circuit (Gray/Light Blue wire). If resistance is less than 5 ohms, repair short to ground in injector No. 8 driver circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
6. Using an external ohmmeter, check resistance of injector No. 8 driver circuit (Gray/Light Blue wire) between injector No. 8 connector and PCM White connector. If resistance is 5 ohms or more, repair open injector No. 8 driver circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-80B to TEST TC-87A. No tests have been omitted.

TEST TC-87A - SPEED CONTROL SWITCH ALWAYS LOW

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, clear DTCs. Turn ignition off. Using scan tool, read Speed Control (S/C) switch sensor voltage. If voltage is less than one volt, go to step 3). If voltage is one volt or more, go to next step.
2. Condition required to set DTC not present at this time. SPEED CONTROL SWITCHES DTC sets if PCM senses actual switch state does not match intended switch state. Possible causes are: shorted switch circuit, defective PCM, open switch ground circuit or shorted/open switch. See «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-4A.
3. Disconnect S/C switch connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-4A. If connector and terminals are okay, go to next step.
4. Read S/C switch sensor voltage. If voltage changes to 5 volts, replace S/C switch and perform TEST VER-4A. If voltage does not change to 5 volts, go to next step.
5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-4A. If connectors and terminals are okay, go to next step.
6. Using an external ohmmeter, check resistance between PCM Gray connector, S/C switch signal circuit (White/Light Green wire) and PCM Black connector, ground circuit (Black/Light Blue wire). If resistance is 5 ohms or more, replace PCM and perform TEST VER-4A. If resistance is less than 5 ohms, repair S/C switch signal circuit shorted to ground circuit and perform TEST VER-4A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-87A to TEST TC-101A. No tests have been omitted.

TEST TC-101A - FUEL PUMP RELAY CONTROL CIRCUIT

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Use scan tool to actuate Fuel Pump (FP) relay. If FP relay does not click, go to step 5). If FP relay clicks, go to next step.
2. Condition required to set DTC is not present at this time. FUEL PUMP RELAY CONTROL CIRCUIT DTC sets if an open or short is detected in FP relay circuit. Possible causes are: open or short in FP relay control circuit, open or short in FP relay fused ignition switch output circuit, FP relay coil open or shorted, inoperative circuit driver in Powertrain Control Module (PCM) or PCM failure. Go to next step.
3. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, go to next step.
4. Start engine. Wiggle wiring harness from FP relay to PCM. If engine stalls while wiggling wiring harness, repair wiring harness as necessary and perform TEST VER-2A. If engine does not stall while wiggling wiring harness, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition). Test is complete. Perform TEST VER-2A.
5. Remove FP relay. Inspect FP relay connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Using scan tool in voltmeter mode, check voltage on FP relay connector, fused ignition switch output circuit (Dark Blue wire). If voltage is 10 volts or less, repair open fused ignition switch output circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step.
7. Using an external ohmmeter, check resistance across FP relay terminals. (Scheme 82) If resistance is 100 ohms or more, replace FP relay and perform TEST VER-2A. If resistance is less than 100 ohms, go to next step.
8. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
9. Using scan tool in ohmmeter mode, check resistance of PCM Gray connector, FP relay control circuit (Brown wire). If resistance less than 5 ohms, repair short to ground FP relay control circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
10. Using an external ohmmeter, check resistance of FP relay control circuit (Brown wire) between FP relay connector and PCM Gray connector. If resistance is 5 ohms or more, repair open FP relay control circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

TEST TC-102A - LEFT/UPSTREAM O2 SENSOR SLOW RESPONSE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Start engine. Check exhaust system for leaks between engine and catalytic converter. Repair exhaust system as necessary and perform TEST VER-5A. If exhaust system is okay, go to next step.
2. Check exhaust for excessive smoke caused by oil consumption. Repair engine mechanical condition as necessary, replace catalytic converter and Oxygen Sensors (O2S), and perform TEST VER-5A. If engine mechanical condition is okay, go to next step.
3. Turn ignition off. Disconnect left/upstream O2S connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-5A. If connector and terminals are okay, go to next step.
4. Using scan tool in ohmmeter mode, check resistance of left/upstream O2S (component side), ground circuit (Gray wire). (Scheme 84) If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-5A. If resistance is less than 5 ohms, go to next step.
5. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-5A. If connectors and terminals are okay, replace left/upstream O2S and perform TEST VER-5A.

Oxygen Sensor Connector Terminals (Component Side). Scheme 84

TEST TC-103A - LEFT/UPSTREAM O2 SENSOR HEATER FAILURE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Disconnect left/upstream O2S connector. Using an external ohmmeter, check resistance between O2S (component side), ASD relay output circuit (White wire) and heater ground circuit (White wire). (Scheme 84) If resistance is not 4-6 ohms, replace left/upstream O2S and perform TEST VER-5A. If resistance is 4-6 ohms, go to next step.
2. Using scan tool in ohmmeter mode, check resistance of O2S connector, heater ground circuit (Black wire). If resistance is 5 ohms or more, repair open heater ground circuit and perform TEST VER-5A. If resistance is less than 5 ohms, go to next step.
3. Start engine. Using scan tool in voltmeter mode, check voltage on left/upstream O2S connector, ASD relay output circuit (Dark Green/Orange wire). If voltage is less than 12 volts, repair open ASD relay output circuit and perform TEST VER-5A. If voltage is 12 volts or more, go to next step.
4. Turn engine off. Using an external ohmmeter, check resistance of O2S signal circuit (Black/Dark Green wire) between O2S connector and PCM Black connector. If resistance is 5 ohms or more, repair open signal circuit and perform TEST VER-5A. If resistance is less than 5 ohms, go to next step.
5. Check resistance of O2S ground circuit (Black/Light Blue wire) between O2S connector and PCM Black connector. If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-5A. If resistance is less than 5 ohms, replace left/upstream O2S and perform TEST VER-5A.

TEST TC-105A - PRE-CAT/DOWNSTREAM O2 SENSOR HEATER FAILURE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Disconnect Pre-Catalyst (PRE-CAT)/downstream O2S connector. Using an external ohmmeter, check resistance between O2S (component side), ASD relay output circuit (White wire) and heater ground circuit (White wire). (Scheme 84) If resistance is not 4-6 ohms, replace PRE-CAT/downstream O2S and perform TEST VER-5A. If resistance is 4-6 ohms, go to next step.
2. Using scan tool in ohmmeter mode, check resistance of O2S connector, heater ground circuit (Black wire). If resistance is 5 ohms or more, repair open heater ground circuit and perform TEST VER-5A. If resistance is less than 5 ohms, go to next step.
3. Start engine. Using scan tool in voltmeter mode, check voltage on PRE-CAT/upstream O2S connector, ASD relay output circuit (Dark Green/Orange wire). If voltage is less than 12 volts, repair open ASD relay output circuit and perform TEST VER-5A. If voltage is 12 volts or more, go to next step.
4. Turn engine off. Using an external ohmmeter, check resistance of O2S signal circuit (Tan/White wire) between O2S connector and PCM Black connector. If resistance is 5 ohms or more, repair open signal circuit and perform TEST VER-5A. If resistance is less than 5 ohms, go to next step.
5. Check resistance of O2S sensor ground circuit (Black/Light Blue wire) between O2S connector and PCM Black connector. If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-5A. If resistance is less than 5 ohms, replace PRE-CAT/downstream O2S and perform TEST VER-5A.

TEST TC-106A - MULTIPLE CYLINDER MISFIRE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Note. Repair any other DTCs before proceeding. MULTIPLE CYLINDER MISFIRE DTC sets only if condition occurs during 2 driving cycles.

1. Using scan tool, clear DTCs. Start engine. Allow engine to reach operating temperature. Road test vehicle. Stop vehicle, turn engine off, then on. Go to next step.
2. Start engine. Continue road test. Ensure engine speed is maintained at 1200-3400 RPM. Avoid sharp maneuvers. Return to service bay. Stop vehicle. Turn ignition off and go to next step.
3. Turn ignition on. Using scan tool, read DTCs. If MULTIPLE CYLINDER MISFIRE DTC returns, go to step 7). If MULTIPLE CYLINDER MISFIRE DTC does not return, and CYLINDER #1, #2, #3, #4, #5, #6, #7, #8, #9 or #10 MISFIRE DTC returns, perform TEST TC-107A. If no CYLINDER MISFIRE DTCs returns, go to next step. NOTE: Refer to manufacturer's operation manual for instructions in use of engine analyzer and procedure for pattern analysis.
4. Connect an engine analyzer to engine. Start engine and check secondary ignition pattern. Repair indicated secondary ignition system component as necessary and perform TEST VER-5A. If secondary ignition pattern is okay, go to next step. NOTE: DO NOT spray inductive pick-up.
5. Using a spray bottle, spray ign cables with water while observing secondary ignition pattern. If pattern changes while spraying water, repair ign cable(s) and perform TEST VER-5A. If pattern is okay, go to next step.
6. Condition required to set DTC is not present at this time. MULTIPLE CYLINDER MISFIRE DTC sets when Powertrain Control Module (PCM) senses an absence of spark. Possible causes are: defective ignition coil circuit, defective spark plug, defective spark plug cable or connector, defective fuel pump or filter, mechanical engine problem, defective EGR system, defective fuel injectors or connectors, restricted exhaust, low fuel level, restricted intake system, defective PCM power grounds, defective EVAP system or defective PCM. See «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-5A. NOTE: Refer to manufacturer's operation manual for instructions in use of engine analyzer and procedure for pattern analysis.
7. Turn ignition off. Connect an engine analyzer to engine. Start engine and allow it to idle. If engine will not idle, maintain constant engine speed at more than idle. Go to next step.
8. Inspect ignition cables for proper installation. Repair cable installation as necessary and perform TEST VER-5A. If cables are installed properly, go to next step.
9. Set engine analyzer to read display or parade pattern and check secondary ignition pattern. Repair indicated secondary ignition system component as necessary and perform TEST VER-5A. If secondary ignition pattern is okay, go to next step. NOTE: DO NOT spray inductive pick-up.
10. Using a spray bottle, spray ignition cables with water while observing secondary ignition pattern. If pattern changes while spraying water, repair ignition cable(s) and perform TEST VER-5A. If pattern is okay, go to next step.
11. Turn ignition off. Connect a vacuum gauge to engine vacuum source. Start engine and allow it to reach normal operating temperature. With parking brake on and shift lever in Neutral, read vacuum gauge. If vacuum gauge does not read at least 13 in. Hg, perform TEST NTC-22A. If vacuum gauge reads at least 13 in. Hg, go to next step.
12. While observing vacuum gauge, snap throttle open and closed. If vacuum does no drop rapidly to zero, repair restricted exhaust system and perform TEST VER-5A. If vacuum drops rapidly to zero, turn ignition off and go to next step. WARNING: Fuel system may be under extreme pressure. Release fuel pressure before connecting fuel pressure gauge. See «FUEL PRESSURE RELEASE»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l) .
13. Release fuel pressure. Connect a fuel pressure gauge to fuel rail. Turn ignition on. Go to next step.
14. Using scan tool, actuate fuel system test. Allow time for fuel pressure gauge to stabilize to normal fuel pressure. Go to next step.
15. Using scan tool, stop fuel system test. Observe fuel pressure gauge for one minute. If fuel pressure drops to less than 10 psi, perform TEST NTC-3A. If fuel pressure does not drop to less than 10 psi, go to next step.
16. Inspect air cleaner and air inlet ducts for restrictions. Clean and repair restrictions as necessary and perform TEST VER-5A. If no restrictions exist, go to next step.
17. Inspect injector wiring and connections. Repair wiring and connectors as necessary and perform TEST VER-5A. If wiring and connectors are okay, go to next step.
18. Perform each test in order listed in REPAIRING MULTIPLE CYLINDER MISFIRE TESTS table. If a test passes, continue to next test until problem is located.

REPAIRING MULTIPLE CYLINDER MISFIRE TESTS

TEST TC-107A - CYLINDER #1, #2, #3, #4, #5, #6, #7, #8, #9 OR

#10 MISFIRE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Note. Repair any other DTCs, including MULTIPLE CYLINDER MISFIRE DTC, before proceeding. Inspect only cylinder(s) that sets DTC.

1. CYLINDER MISFIRE DTC sets when Powertrain Control Module (PCM) senses an absence of spark. Possible causes are: defective ignition coil circuit, defective spark plug, defective spark plug cable or connector, defective fuel pump or filter, mechanical engine problem, defective EGR system, defective fuel injectors or connectors, restricted exhaust, low fuel level, restricted intake system, defective PCM power grounds, defective EVAP system or defective PCM. Go to next step. NOTE: Refer to manufacturer's operation manual for instructions in use of engine analyzer and procedure for pattern analysis.
2. Turn ignition off. Connect an engine analyzer to engine. Start engine and allow it to idle. If engine will not idle, maintain constant engine speed at more than idle. Go to next step.
3. Inspect ignition cables for proper installation. Repair cable installation as necessary and perform TEST VER-5A. If cable are installed properly, go to next step.
4. Set engine analyzer to read display or parade pattern. Repair indicated secondary ignition system component as necessary and perform TEST VER-5A. If secondary ignition pattern is okay, go to next step. NOTE: DO NOT spray inductive pick-up.
5. Using a spray bottle, spray ignition cables with water while observing secondary ignition pattern. If pattern changes while spraying water, repair ignition cable(s) and perform TEST VER-5A. If pattern is okay, go to next step.
6. Turn ignition off. Connect a vacuum gauge go brake booster vacuum hose. Start engine and allow it to reach normal operating temperature. With parking brake on and shift lever in Neutral, read vacuum gauge. If vacuum gauge does not read at least 13 in. Hg, perform TEST NTC-18A. If vacuum gauge reads at least 13 in. Hg, go to next step.
7. Turn ignition off. Remove all spark plugs. Remove Auto Shutdown (ASD) relay. Check engine compression. If cylinder(s) that set DTC is not within 25 percent of other cylinders, repair engine mechanical problem as necessary and perform TEST VER-5A. If cylinder(s) is within 25 percent of other cylinders, go to next step.
8. Inspect cam lobes on cylinder(s) that set DTC. Replace camshaft if necessary and perform TEST VER-5A. If cam lobes okay, replace spark plugs for cylinder(s) that set DTC, perform TEST VER-5A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-107A to TEST TC-112A. No tests have been omitted.

TEST TC-112A - CATALYTIC CONVERTER EFFICIENCY FAILURE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Note. Repair any oxygen sensor related DTCs before proceeding.

1. Using scan tool, read DTCs. If scan tool displays any Oxygen Sensor (O2S) related DTCs, see DTC MESSAGES & CODES table in DTC TEST and perform appropriate test(s). If no O2S related DTCs are displayed, go to next step.
2. Check if any Technical Service Bulletins (TSBs) apply to vehicle. If so, perform corrective action and perform TEST VER-5A. If no TSBs exist, go to next step.
3. CATALYTIC CONVERTER EFFICIENCY FAILURE DTC sets in Powertrain Control Module (PCM) as catalytic converter loses ability to store oxygen and concentration of oxygen becomes the same downstream (after catalytic converter) as upstream (before catalytic converter). Output voltage of downstream O2S becomes the same as upstream O2S with a time lag seen by PCM between switching of O2S. Go to next step.
4. Malfunction Indicator Light (MIL) on instrument panel will illuminate after 2 trips and remain on, but goes off if conditions required to set DTC are not found on subsequent trips. Possible causes are: defective catalytic converter, exhaust leaks before catalytic converter, contaminated fuel or engine mechanical problem. Go to next step.
5. Start engine. Check for exhaust leaks between engine and downstream O2S. Repair leaks as necessary and perform TEST VER-5A. If no exhaust leaks exists, go to next step.
6. Check for excessive smoke caused by high oil consumption. Repair engine mechanical condition as necessary, replace catalytic converter and perform TEST VER-5A. If no excessive smoke and high oil consumption exists, go to next step. NOTE: A newly installed downstream O2S with an existing, aging upstream O2S may cause this DTC to be set.
7. If downstream O2S has been not been replaced within last 5000 miles, replace catalytic converter and perform TEST VER-5A. If downstream O2S has been replaced within last 5000 miles, go to next step.
8. If upstream oxygen sensor has been replaced within last 5000 miles, replace catalytic converter and perform TEST VER-5A. If downstream oxygen sensor has not been replaced within last 5000 miles, replace downstream oxygen sensor and perform TEST VER-5A.

TEST TC-113A - EVAP PURGE FLOW MONITOR FAILURE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Note. Replacing PCM will not correct this problem. EVAP purge solenoid may also be referred to as EVAP solenoid.

1. Using scan tool, monitor EVAP PURGE SOLENOID state. Start engine. Allow engine to reach normal operating temperature. Disconnect EVAP solenoid-to-EVAP canister hose at EVAP solenoid. Go to next step.
2. Ensure no continuous vacuum flow exists through EVAP solenoid while scan tool displays duty cycle more than zero percent. If continuous vacuum flow does not exist, go to step 4). If continuous vacuum flow exists, go to next step. CAUTION: DO NOT use more than 5 psi in following step.
3. Turn ignition off. Attempt to blow air through EVAP solenoid-to-EVAP canister hose. If air flows, EVAP solenoid and hoses are okay. Test is complete. Perform TEST VER-5A. If air does not flow, perform TEST TC-113B.
4. Turn engine off, ignition on. Disconnect EVAP solenoid-to-throttle hose at EVAP solenoid. Connect a vacuum gauge to disconnected hose. Start engine and allow it to idle. If gauge does not read manifold vacuum, repair restriction in vacuum hose, throttle or intake manifold and perform TEST VER-5A. If gauge reads manifold vacuum, go to next step.
5. Reconnect EVAP solenoid-to-throttle hose. Connect vacuum gauge to canister side of EVAP solenoid. If vacuum reading is not 3-7 in. Hg, replace EVAP solenoid and perform TEST VER-5A. If vacuum reading is 3-7 in. Hg, go to next step.
6. Connect vacuum pump to EVAP solenoid-to-EVAP canister hose. Apply more than 2 in. Hg vacuum. If canister does not hold more than 2 in. Hg, replace EVAP solenoid and perform TEST VER-5A. If canister holds more than 2 in. Hg, go to next step.
7. Check for plugged hose or vent port on EVAP canister. Repair hose as necessary and perform TEST VER-5A. If vent port is plugged, clean plugged vent port and retest. If no plugs exist, replace EVAP canister and perform TEST VER-5A.

TEST TC-113B - EVAP PURGE FLOW MONITOR FAILURE

Note. Perform TEST TC-113A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Note. Replacing PCM will not correct this problem. EVAP purge solenoid may also be referred to as EVAP solenoid.

1. Disconnect EVAP solenoid-to-EVAP canister hose at canister. Attempt to blow air through hose. If air does not flow, repair or replace hose and perform TEST VER-5A. if air flows, go to next step.
2. Check for plugged hose vent port on EVAP canister. Repair hose as necessary and perform TEST VER-5A. If vent port is plugged, clean plugged vent port and retest. If no plug exists, replace EVAP canister and perform TEST VER-5A.

TEST TC-114A - P/N SWITCH STUCK IN PARK OR IN GEAR

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read Park/Neutral (P/N) position switch input state. Move gear selector in and out of Park and Reverse while observing scan tool display. If scan tool does not display P/N and D/R, go to step 4). If scan tool displays P/N and D/R, go to next step.
2. Condition required to set DTC is not present at this time. PARK/NEUTRAL SWITCH FAILURE DTC sets if Powertrain Control Module (PCM) senses transmission is in Drive, with vehicle speed more than 8 MPH, engine speed more than 992 RPM, throttle position sensor closed and MAP sensor outside of predetermined parameter during 2 driving cycles. Possible causes are: defective connector terminals or connector wires, disconnected wiring harness, defective P/N position switch, mechanical transmission problem or defective PCM. Go to next step.
3. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.
4. Turn ignition off. Place gear selector in Park. Disconnect PCM connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of PCM Black connector, P/N position switch sense circuit (Brown/Orange wire). Go to next step.
6. Move gear selector in and out of Park and Reverse while observing scan tool display. If resistance switches from less than 5 ohms to more than 5 ohms, replace PCM and perform TEST VER-2A. If resistance does not switch from less than 5 ohms to more than 5 ohms, go to next step.
7. If resistance stays at less than 5 ohms at all times, go to next step. If resistance does not stay at less than 5 ohms at all times, go to step 10).
8. Disconnect P/N switch connector. Check resistance of PCM Black connector, P/N position switch sense circuit (Brown/Orange wire). Go to next step.
9. Move gear selector in and out of Park and Reverse while observing scan tool display. If resistance stays at less than 5 ohms at all times, repair short to ground in P/N position switch sense circuit and perform TEST VER-2A. If resistance does not stay at less than 5 ohms at all times repair or replace stuck P/N position switch and perform TEST VER-2A.
10. Disconnect P/N position switch connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
11. Using an external ohmmeter, check resistance of P/N position switch connector, P/N switch sense circuit (Brown/Orange wire) between P/N position switch connector and PCM Black connector. If resistance is less than 5 ohms, replace P/N position switch and perform TEST VER-2A. If resistance is 5 ohms or more, repair open P/N position switch sense circuit and perform TEST VER-2A.

TEST TC-118A - FUEL SYSTEM RICH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. FUEL SYSTEM RICH DTC sets if Powertrain Control Module (PCM) senses fuel system is running too rich on 2 sequential trips. Possible causes are: defective catalytic converter, defective PCM, engine wear, defective fuel injectors, defective MAP sensor, defective upstream Oxygen Sensor (O2S), defective fuel pressure regulator, or defective connector terminals or connector wires. Go to next step.
2. Perform TEST NTC-8A. If test fails, perform appropriate repair procedure indicated in test. Test is complete. If test passes, perform TEST TC-118B.

TEST TC-118B - FUEL SYSTEM RICH

Note. Perform TEST TC-118A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-5A. If wiring and connectors are okay, go to next step.
2. Perform each test in order listed in REPAIRING FUEL SYSTEM RICH TESTS table. If a test passes, continue to next test until problem is located.

REPAIRING FUEL SYSTEM RICH TESTS

TEST TC-119A - FUEL SYSTEM LEAN

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Note. Very low fuel level could cause FUEL SYSTEM LEAN DTC to set. Ensure fuel tank is at least 1/4 full.

1. If vehicle ran out of fuel shortly before FUEL SYSTEM LEAN DTC set, ensure fuel tank is at least 1/4 full. Using scan tool, erase DTCs and perform TEST VER-5A. If vehicle did not run out of fuel shortly before DTC set, ensure fuel tank is at least 1/4 full and go to next step.
2. FUEL SYSTEM LEAN DTC sets if Powertrain Control Module (PCM) senses fuel system is running to lean on 2 sequential trips. Possible causes are: defective ignition coil, defective PCM, engine wear, defective exhaust manifold, defective fuel pump, defective fuel filter, defective ignition secondary wires, defective injectors, defective MAP sensor, defective upstream Oxygen Sensor (O2S), defective fuel pressure regulator, defective fuel pump relay, defective spark plugs, or defective connector terminals or connector wires. Go to next step.
3. Using scan tool, read DTCs. Repair any other DTCs before proceeding. See DTC MESSAGES & CODES table in DTC TEST and perform appropriate test(s). If no other DTCs exist, go to next step.
4. Start engine. Allow engine to reach normal operating temperature. Allow engine to idle for 20 seconds after warm-up. Inspect exhaust system between engine and upstream O2S for leaks. Repair exhaust system as necessary and perform TEST VER-5A. If exhaust system is okay, turn engine off and perform TEST TC-119B.

TEST TC-119B - FUEL SYSTEM LEAN

Note. Perform TEST TC-119A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-5A. If wiring and connectors are okay, go to next step.
2. Perform each test in order listed in REPAIRING FUEL SYSTEM LEAN TESTS table. If a test passes, continue to next test until problem is located.

REPAIRING FUEL SYSTEM LEAN TESTS

TEST TC-120A - RIGHT BANK FUEL SYSTEM RICH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. FUEL SYSTEM RICH DTC sets if Powertrain Control Module (PCM) senses fuel system is running too rich on 2 sequential trips. Possible causes are: defective catalytic converter, defective PCM, engine wear, defective fuel injectors, defective MAP sensor, defective upstream Oxygen Sensor (O2S), defective fuel pressure regulator, or defective connector terminals or connector wires. Go to next step.
2. Perform TEST NTC-8A. If test fails, perform appropriate repair procedure indicated in test. Test is complete. If test passes, perform TEST TC-118B.

TEST TC-120B - RIGHT BANK FUEL SYSTEM RICH

Note. Perform TEST TC-120A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-5A. If wiring and connectors are okay, go to next step.
2. Perform each test in order as listed in the «REPAIRING FUEL SYSTEM RICH TESTS»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l) table. If a test passes, continue to next test until problem is located.

TEST TC-121A - RIGHT BANK FUEL SYSTEM LEAN

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Note. Very low fuel level could cause FUEL SYSTEM LEAN DTC to set. Ensure fuel tank is at least 1/4 full.

1. If vehicle ran out of fuel shortly before FUEL SYSTEM LEAN DTC set, ensure fuel tank is at least 1/4 full. Using scan tool, erase DTCs and perform TEST VER-5A. If vehicle did not run out of fuel shortly before DTC sets, ensure fuel tank is at least 1/4 full and go to next step.
2. FUEL SYSTEM LEAN DTC sets if Powertrain Control Module (PCM) senses fuel system is running to lean on 2 sequential trips. Possible causes are: defective ignition coil, defective PCM, engine wear, defective exhaust manifold, defective fuel pump, defective fuel filter, defective ignition secondary wires, defective injectors, defective MAP sensor, defective upstream Oxygen Sensor (O2S), defective fuel pressure regulator, defective fuel pump relay, defective spark plugs, or defective connector terminals or connector wires. Go to next step.
3. Using scan tool, read DTCs. Repair any other DTCs before proceeding. See «DTC MESSAGES & CODES»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l) table in DTC TEST and perform appropriate test(s). If no other DTCs exist, go to next step.
4. Start engine. Allow engine to reach normal operating temperature. Allow engine to idle for 20 seconds after warm-up. Inspect exhaust system between engine and upstream O2S for leaks. Repair exhaust system as necessary and perform TEST VER-5A. If exhaust system is okay, go to next step.
5. Using scan tool, monitor right O2S state for 10 seconds or more. If O2S state switches from lean to rich twice within 10 seconds, condition required to set DTC is no longer present. Test is complete. Perform TEST VER-5A. If O2S state does not switch as specified, turn engine off and perform TEST TC-121B.

TEST TC-121B - RIGHT BANK FUEL SYSTEM LEAN

Note. Perform TEST TC-121A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Inspect all related wiring and connectors for damage. Repair wiring and connectors as necessary and perform TEST VER-5A. If wiring and connectors are okay, go to next step.
2. Perform each test in order, as listed in the «REPAIRING FUEL SYSTEM LEAN TESTS»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l) table. If a test passes, continue to next test until problem is located.

TEST TC-122A - RIGHT/UPSTREAM O2 SENSOR SLOW RESPONSE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. RIGHT/UPSTREAM O2S SHORTED TO VOLTAGE DTC sets if right/upstream Oxygen Sensor (O2S) voltage is more than 1.5 volts with engine running and engine at operating temperature. Possible causes are: O2S output circuit shorted to power circuit, defective O2S, defective PCM, open circuit, or defective wiring or connectors. Go to next step.
2. Start engine. Check exhaust system for leaks between engine and catalytic converter. Repair exhaust system as necessary and perform TEST VER-5A. If exhaust system is okay, go to next step.
3. Check exhaust for excessive smoke caused by oil consumption. Repair engine mechanical condition as necessary, replace catalytic converter and O2Ss, and perform TEST VER-5A. If engine mechanical condition is okay, go to next step.
4. Turn ignition off. Disconnect right/upstream O2S connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-5A. If connector and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of right/upstream O2S (component side), ground circuit (Gray wire). (Scheme 84) If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-5A. If resistance is less than 5 ohms, go to next step.
6. Disconnect PCM connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-5A. If connectors and terminals are okay, replace right/upstream O2S and perform TEST VER-5A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-122A to TEST TC-124A. No tests have been omitted.

TEST TC-124A - RIGHT/UPSTREAM O2 SENSOR HEATER FAILURE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Disconnect right/upstream O2S connector. Using an external ohmmeter, check resistance between O2S (component side), ASD relay output circuit (White wire) and heater ground circuit (White wire). (Scheme 84) If resistance is not 4-6 ohms, replace right/upstream O2S and perform TEST VER-5A. If resistance is 4-6 ohms, go to next step.
2. Using scan tool in ohmmeter mode, check resistance of O2S connector, heater ground circuit (Black wire). If resistance is 5 ohms or more, repair open heater ground circuit and perform TEST VER-5A. If resistance is less than 5 ohms, go to next step.
3. With engine running, check voltage on right/upstream O2S connector, ASD relay output circuit (Dark Green/Orange wire). If voltage is less than 12 volts, repair open ASD relay output circuit and perform TEST VER-5A. If voltage is 12 volts or more, go to next step.
4. Using an external ohmmeter, check resistance of right/upstream O2S signal circuit (Black/Dark Green wire) between O2S connector and PCM Black connector. If resistance is 5 ohms or more, repair open signal circuit and perform TEST VER-5A. If resistance is less than 5 ohms, go to next step.
5. Check resistance of right/upstream O2S connector, ground sensor circuit (Black/Light Blue wire) between O2S connector and PCM Black connector. If resistance is 5 ohms or more, repair open sensor ground circuit and perform TEST VER-5A. If resistance is less than 5 ohms, replace right/upstream O2S and perform TEST VER-5A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-124A to TEST TC-126A. No tests have been omitted.

TEST TC-126A - PRE-CATALYST/DOWNSTREAM O2 SENSOR SHORTED TO

VOLTAGE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Warm engine to normal operating temperature. Wait 4 minutes with engine running. Using scan tool, read Pre-Catalyst (PRE-CAT)/downstream Oxygen Sensor (O2S) voltage. If voltage is more than 1.5 volts, go to step 5). If voltage is 1.5 volts or less, go to next step.
2. Wiggle wiring harness and connector at PRE-CAT/downstream O2S while monitoring PRE-CAT/downstream O2S voltage. If voltage increases to more than 1.5 volts at any time when moving wiring harness, repair wiring harness and connector for short to voltage or open circuit as necessary and perform TEST VER-5A. If voltage does not increase to more than 1.5 volts at any time, go to next step.
3. Condition required to set DTC is not present at this time. PRE-CATALYST/DOWNSTREAM O2S SHORTED TO VOLTAGE DTC sets if PRE-CAT/downstream O2S voltage is more than 1.2 volts. Possible causes are: O2S output circuit shorted to another circuit, dirty/wet connection causing voltage tracking to another connection, defective O2S, defective Powertrain Control Module (PCM) or defective wiring or connectors. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-5A. If wiring and connectors are okay, test is complete. Perform TEST VER-5A.
5. Disconnect PRE-CAT/downstream O2S connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-5A. If connector and terminals are okay, go to next step.
6. Using scan tool, read PRE-CAT/downstream O2S voltage. If voltage is 1.5 volts or less, repair open to voltage in PRE-CAT/downstream O2S connector, signal circuit (Tan/White wire) and perform TEST VER-5A. If voltage is more than 1.5 volts, perform TEST TC-105A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-126A to TEST TC-128A. No tests have been omitted.

TEST TC-128A - CLOSED LOOP TEMPERATURE NOT REACHED

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Note. The following test is invalid if thermostat is stuck open.

1. Check thermostat operation. Replace thermostat if necessary and perform TEST VER-2A. if thermostat is operating correctly, go to next step.
2. CLOSED LOOP TEMP NOT REACHED DTC sets if engine temperature does not reach more than 18°F (-7.7°C) within 10 minutes of engine start. Possible causes are: defective thermostat, defective Engine Coolant Temperature (ECT) sensor, extremely cold ambient temperature, defective PCM, defective connector terminals or connector wires. Go to next step.
3. Using scan tool temperature probe, check engine temperature. Run engine until engine temperature reaches more than 80°F (26.6°C). Turn ignition off and go to next step.
4. Disconnect ECT sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminal are okay, go to next step.
5. Using an external ohmmeter, check resistance across ECT sensor. If resistance is 11,000 ohms or more, replace ECT sensor and perform TEST VER-2A. If resistance is less than 11,000 ohms, go to next step.
6. Disconnect Powertrain Control Module (PCM) connectors. Inspect PCM connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, replace PCM and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-128A to TEST TC-132A. No tests have been omitted.

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

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read DTCs. If scan tool displays any MAP sensor related DTCs, see «DTC MESSAGES & CODES»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l) table in DTC TEST and perform appropriate test(s). If no MAP sensor related DTCs are displayed, go to next step.
2. Using scan tool, read MAP sensor voltage. If voltage is less than 3.5 volts, perform TEST NTC-6A. If voltage is 3.5 volts or more, go to next step.
3. Start engine. Using scan tool, read MAP sensor voltage. If voltage does not drop from more than 3.5 volts to less than 2.0 volts, perform TEST NTC-6A. If voltage drops from more than 3.5 volts to less than 2.0 volts, go to next step.
4. TPS VOLTAGE DOES NOT AGREE WITH MAP DTC sets if proper Throttle Position (TP) sensor voltage is not present after 4 seconds when 2 predetermined conditions are met. Possible causes are: defective PCM, defective TP sensor, mechanical failure, defective connector terminals or connector wires, miswired connector terminals, defective vehicle speed sensor or defective MAP sensor. Go to next step.
5. With throttle linkage at idle position, check throttle plate and linkage for binding. Repair throttle plate and linkage as necessary. If throttle plate and linkage are okay, go to next step. NOTE: If TP sensor 5-volt supply circuit and ground circuit are switched at TP sensor connector or at PCM connector, TPS VOLTAGE DOES NOT AGREE WITH MAP DTC will set.
6. Disconnect TP sensor connector. Ensure appropriate wire is installed in correct TP sensor connector terminal. See TP SENSOR CONNECTOR WIRING table. Inspect connector and terminals for damage. Repair connector and terminals as necessary. If connector and terminals are okay, go to next step. TP SENSOR CONNECTOR WIRING (1) Terminal No. Circuit Wire Color 1 5-Volt Supply VIO/WHT 2 Signal ORG/DK BLU 3 Ground BLK/LT BLU (1) View connector from terminal end with locking clip facing up. Terminals are numbered right to left.
7. Using scan tool in voltmeter mode, check voltage on TP sensor connector, 5-volt supply circuit. For appropriate wire color, see TP SENSOR CONNECTOR WIRING table. If voltage is less than 0.5 volt, repair open 5-volt supply circuit and perform TEST VER-2A. If voltage is 0.5 volt or more, go to next step.
8. Reconnect TP sensor connector. Turn ignition on. Using scan tool, read TP sensor voltage. If voltage is more than one volt, replace TP sensor and perform TEST VER-2A. If voltage is one volt or less, go to next step.
9. Slowly open and close throttle while monitoring scan tool display. If voltage does not change smoothly when throttle is opened and closed, replace TP sensor and perform TEST VER-2A. If voltage changes smoothly, go to next step.
10. Open throttle to wide open throttle position while monitoring scan tool display. If voltage is 3.5 volts or less, replace TP sensor and perform TEST VER-2A. If voltage is more than 3.5 volts, go to next step.
11. Wiggle TP sensor connectors and harness while observing scan tool display. If voltage changes while wiggling connectors and harness, repair connectors or harness that caused voltage to change and perform TEST VER-2A. If voltage does not change while wiggling TP sensor connectors and harness, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-132A to TEST TC-138A. No tests have been omitted.

TEST TC-138A - TARGET IDLE NOT REACHED

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn engine off, ignition on. With throttle linkage at idle position and throttle plate fully closed against its stop, check throttle plate and linkage for binding. Repair throttle plate and linkage as necessary and perform TEST VER-2A. If throttle linkage and plate are okay, go to next step.
2. Start engine. Allow engine to idle for 60 seconds. If vehicle is equipped with automatic transmission, set parking brake, depress brake pedal and put gear selector in Drive. On all vehicles, use scan tool to read TARGET IDLE and engine speed (RPM). If engine RPM is within 200 RPM of target idle, go to step 5). If engine RPM is not within 200 RPM of target idle, go to next step. NOTE: The following test step is invalid if engine has any vacuum leaks.
3. Check engine, brake booster and vacuum hoses for leaks. Ensure PCV valve is operating properly. Repair vacuum leaks or replace PCV valve as necessary and perform TEST VER-2A. If no vacuum leaks exist and PCV valve is operating properly, go to next step.
4. Start engine. Allow engine to warm up. Using scan tool, actuate IAC wiggle test. Idle speed should raise and lower with scan tool display. If IAC motor does not operate as specified, perform TEST TC-25A. If IAC motor operates as specified, perform TEST TC-138B.
5. Condition required to set DTC is not present at this time. TARGET IDLE NOT REACHED DTC sets if PCM senses target idle is not within 200 RPM of target idle for 2.96 milliseconds. Possible causes are: IAC driver circuit shorted to ground, IAC driver circuit shorted to battery, IAC driver circuits shorted together, defective PCM, IAC motor shorted internally, carbon deposits, open driver circuit, defective connector terminals or connector wires. Go to next step.
6. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, go to next step.
7. Wiggle harness from IAC motor to PCM. Observe for IAC motor to stop operating. If IAC motor stops operating, repair harness where wiggling caused motor to stop and perform TEST VER-2A. If IAC motor continues to operate, go to next step.
8. Stop IAC motor wiggle test. See «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.

TEST TC-138B - TARGET IDLE NOT REACHED

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect PCV valve hose from intake manifold. Cap vacuum port at intake manifold. Disconnect idle purge hose from throttle. Install Orifice Tool (6457) on idle purge hose port at throttle. Go to next step.
2. Start engine. Allow engine to reach operating temperature. Using scan tool, actuate MIN AIRFLOW. If engine speed is 500 RPM or more, replace throttle and perform TEST VER-2A. If engine speed is less than 500 RPM, go to next step. WARNING: Clean throttle in well ventilated area and wear rubber gloves.
3. Remove throttle. While holding throttle open, spray entire throttle bore with carburetor/throttle cleaner. Using soft scuff pad, clean throttle bore and throttle plate. Using compressed air, dry throttle. Install throttle and go to next step.
4. Start engine. Allow engine idle to stabilize. Using scan tool, actuate MIN AIRFLOW. If engine speed is less than 500 RPM, replace throttle and perform TEST VER-2A. If engine speed is 500 RPM or more, test is complete. Perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-138B to TEST TC-141A. No tests have been omitted.

TEST TC-141A - GOVERNOR PRESSURE NOT EQUAL TO TARGET AT

15-20 PSI

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read DTCs. Repair any other transmission related DTCs before proceeding. See «DTC MESSAGES & CODES»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l) table in DTC TEST and perform appropriate test(s). If no other transmission related DTCs exist, go to next step.
2. Start engine. Allow engine to reach operating temperature. With engine running, put gear selector in Neutral and go to next step.
3. Using scan tool, read governor pressure sensor value. If scan tool displays more than zero psi, perform TEST TC-141B. If scan tool displays zero psi, go to next step.
4. Set parking brake, depress brake pedal and put gear selector in Drive. Read governor pressure sensor value. If scan tool displays more than zero psi, perform TEST TC-141C. If scan tool displays zero psi, leave engine on and perform TEST TC-141D.

TEST TC-141B - GOVERNOR PRESSURE NOT EQUAL TO TARGET AT

15-20 PSI

Note. Perform TEST TC-141A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Install a pressure gauge at governor pressure port. (Scheme 85) Start engine. With gear selector in Neutral, read gauge pressure. If pressure is zero psi, go to step 4). If pressure is more than zero, go to next step.
2. Turn engine off. Drain and remove transmission oil pan. Inspect pan for burnt oil and debris. Repair transmission as necessary and perform TEST VER-2A. If transmission is okay, go to next step.
3. Remove transmission valve. Inspect for internal transmission damage. Repair transmission as necessary and perform TEST VER-2A. If transmission is okay, replace valve and perform TEST VER-2A.
4. Turn engine off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
5. Using an external voltmeter, check voltage on transmission solenoid connector, 5-volt supply circuit (Orange wire). If voltage is less than 5 volts, repair 5-volt supply circuit as necessary and perform TEST VER-2A. If voltage is 5 volts or more, go to next step.
6. Turn ignition off. Using an external ohmmeter, check resistance between transmission solenoid connector, sensor ground circuit (Black/Light Blue wire) and engine ground. If resistance is 10 ohms or more, repair open sensor ground circuit and perform TEST VER-2A. If resistance is less than 10 ohms, go to next step.
7. Connect a jumper wire between transmission solenoid connector, governor pressure sensor circuit (Light Green/Red wire) and sensor ground circuit (Black/Light Blue wire). Go to next step.
8. Turn ignition on. Using scan tool, read governor pressure sensor. If scan tool does not display zero psi, perform TEST TC-141E. If scan tool displays zero psi, go to next step.
9. Turn ignition off. Drain and remove transmission oil pan. Inspect pan for burnt oil and debris. Repair transmission as necessary and perform TEST VER-2A. If transmission is okay, go to next step.
10. Disconnect governor pressure sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
11. Using an external ohmmeter, check resistance of governor pressure sensor circuit (White wire) between governor pressure sensor connector and transmission solenoid connector. If resistance is 10 ohms or more, repair open governor pressure sensor circuit and perform TEST VER-2A. If resistance is less than 10 ohms, go to next step.
12. Check resistance of sensor ground circuit (Green wire) between governor pressure sensor connector and transmission solenoid connector. If resistance is 10 ohms or more, repair open sensor ground circuit and perform TEST VER-2A. If resistance is less than 10 ohms, go to next step.
13. Check resistance of 5-volt supply circuit (Red wire) between governor pressure sensor connector and transmission solenoid connector. If resistance is 10 ohms or more, repair open 5-volt supply circuit and perform TEST VER-2A. If resistance is less than 10 ohms, go to next step.
14. Check resistance of 5-volt supply circuit (Red wire) between transmission solenoid connector and transmission solenoid pack connector (transmission side). If resistance is 10 ohms or more, repair open 5-volt supply circuit and perform TEST VER-2A. If resistance is less than 10 ohms, replace governor pressure sensor and perform TEST VER-2A.

Identifying Transmission Test Ports. Scheme 85

TEST TC-141C - GOVERNOR PRESSURE NOT EQUAL TO TARGET AT

15-20 PSI

Note. Perform TEST TC-141A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using scan tool in ohmmeter mode, check resistance of transmission solenoid connector, relay output circuit (Light Blue wire). If resistance is 5 ohms or more, repair open relay output circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
3. Using an external ohmmeter, check resistance between transmission solenoid pack connector (transmission side), governor pressure solenoid circuit (Violet wire) and relay output circuit (Blue wire). If resistance is 4.7 ohms or more, perform TEST TC-141F. If resistance is less than 4.7 ohms, go to next step.
4. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and Perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using an external ohmmeter, check resistance of governor pressure solenoid circuit (Pink wire) between transmission solenoid connector and PCM White connector. If resistance is 10 ohms or less, repair open governor pressure solenoid circuit and perform TEST VER-2A. If resistance is more than 10 ohms, replace PCM and perform TEST VER-2A.

TEST TC-141D - GOVERNOR PRESSURE NOT EQUAL TO TARGET AT

15-20 PSI

Note. Perform TEST TC-141A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, actuate governor pressure solenoid at zero percent duty cycle and read governor pressure sensor volts. If voltage cycles between 0.0 and 3.8 volts, go to step 3). If voltage does not cycle between 0.0 and 3.8 volts go to next step.
2. Turn engine off. Install a pressure gauge on transmission at governor pressure port. (Scheme 85) Start engine and compare scan tool and gauge readings. If readings are within 10 psi of each other, perform TEST TC-141C. If readings are not within 10 psi of each other, perform TEST TC-141B.
3. Drive vehicle at 20 MPH. Using scan tool, monitor governor pressure and target pressure. If pressures do not stay consistently within 5 psi of each other, perform TEST TC-141C. If pressures stay consistently within 5 psi of each other, no problem is found at this time. See «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition). Test is complete. Perform TEST VER-2A.

TEST TC-141E - GOVERNOR PRESSURE NOT EQUAL TO TARGET AT

15-20 PSI

Note. Perform TEST TC-141A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and Perform TEST VER-2A. If connectors and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of governor pressure sensor circuit (Light Green/Red wire) between transmission solenoid connector and PCM White connector. If resistance 10 ohms or more, repair open governor pressure sensor circuit and perform TEST VER-2A. If resistance is less than 10 ohms, replace PCM and perform TEST VER-2A.

TEST TC-141F - GOVERNOR PRESSURE NOT EQUAL TO TARGET AT

15-20 PSI

Note. Perform TEST TC-141A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn engine off. Drain and remove transmission oil pan. Inspect pan for burnt oil and debris. Repair transmission as necessary and perform TEST VER-2A. If transmission is okay, go to next step.
2. Using an external ohmmeter, check resistance of governor pressure solenoid circuit (Violet wire) between solenoid pack connector (transmission side) and solenoid connector. If resistance is 10 ohms or more, repair open governor pressure solenoid circuit and perform TEST VER-2A. If resistance is less than 10 ohms, go to next step.
3. Check resistance of transmission relay output circuit (Blue wire) between solenoid pack connector (transmission side) and solenoid connector. If resistance is 10 ohms or more, repair open transmission relay output circuit and perform TEST VER-2A. If resistance is less than 10 ohms, replace governor pressure solenoid and perform TEST VER-2A.

TEST TC-142A - GOVERNOR PRESSURE ABOVE 3 PSI IN GEAR

W/ZERO MPH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read DTCs. Repair any other transmission related DTCs before proceeding. See «DTC MESSAGES & CODES»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l) table in DTC TEST and perform appropriate test(s). If no other transmission related DTCs exist, go to next step.
2. Start engine. Allow engine to reach operating temperature. With engine running, put gear selector in Neutral and go to next step.
3. Using scan tool, read governor pressure sensor value. If scan tool displays more than zero psi, perform TEST TC-142B. If scan tool displays zero psi, go to next step.
4. Set parking brake, depress brake pedal and put gear selector in Drive. Read governor pressure sensor value. If scan tool displays more than zero psi at zero MPH, perform TEST TC-142C. If scan tool displays zero psi at zero MPH, leave engine on and perform TEST TC-142D.

TEST TC-142B - GOVERNOR PRESSURE ABOVE 3 PSI IN GEAR WITH

ZERO MPH

Note. Perform TEST TC-142A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Install a pressure gauge at governor pressure port. (Scheme 85) Start engine. With gear selector in Neutral, read gauge pressure. If pressure is less than 3 psi, go to step 4). If pressure is 3 psi or more, go to next step.
2. Turn engine off. Drain and remove transmission oil pan. Inspect pan for burnt oil and debris. Repair transmission as necessary and perform TEST VER-2A. If transmission is okay, go to next step.
3. Remove transmission valve. Inspect for internal transmission damage. Repair transmission as necessary and perform TEST VER-2A. If transmission is okay, replace valve and perform TEST VER-2A.
4. Turn engine off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
5. Turn ignition on. Using an external voltmeter, check voltage on transmission solenoid connector, 5-volt supply circuit (Orange wire). If voltage is less than 5 volts, repair 5-volt supply circuit as necessary and perform TEST VER-2A. If voltage is 5 volts or more, go to next step.
6. Using an external ohmmeter, check resistance between transmission solenoid connector, sensor ground circuit (Black/Light Blue wire) and engine ground. If resistance is 10 ohms or more, repair open sensor ground circuit and perform TEST VER-2A. If resistance is less than 10 ohms, go to next step.
7. Connect a jumper wire between transmission solenoid connector, governor pressure sensor circuit (Light Green/Red wire) and sensor ground circuit (Black/Light Blue wire). Go to next step.
8. Using scan tool, read governor pressure sensor. If scan tool does not display zero psi, perform TEST TC-142E. If scan tool displays zero psi, go to next step.
9. Turn engine off. Drain and remove transmission oil pan. Inspect pan for burnt oil and debris. Repair transmission as necessary and perform TEST VER-2A. If transmission is okay, go to next step.
10. Disconnect governor pressure sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
11. Using an external ohmmeter, check resistance of governor pressure sensor circuit (White wire) between governor pressure sensor connector and transmission solenoid pack connector (transmission side). If resistance is 10 ohms or more, repair open governor pressure sensor circuit and perform TEST VER-2A. If resistance is less than 10 ohms, go to next step.
12. Check resistance of sensor ground circuit (Green wire) between governor pressure sensor connector and transmission solenoid pack connector (transmission side). If resistance is 10 ohms or more, repair open sensor ground circuit and perform TEST VER-2A. If resistance is less than 10 ohms, replace governor pressure sensor and perform TEST VER-2A.

TEST TC-142C - GOVERNOR PRESSURE ABOVE 3 PSI IN GEAR WITH

ZERO MPH

Note. Perform TEST TC-142A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using scan tool in ohmmeter mode, check resistance of transmission solenoid connector, relay output circuit (Light Blue wire). If resistance is 5 ohms or more, repair open relay output circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
3. Using an external ohmmeter, check resistance between transmission solenoid pack connector (transmission side), governor pressure solenoid circuit (Violet wire) and relay output circuit (Blue wire). If resistance is 4.7 ohms or more, perform TEST TC-142F. If resistance is less than 4.7 ohms, go to next step.
4. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using an external ohmmeter, check resistance of governor pressure solenoid circuit (Pink wire) between transmission solenoid connector and PCM White connector. If resistance is 10 ohms or less, repair open governor pressure solenoid circuit and perform TEST VER-2A. If resistance is more than 10 ohms, replace PCM and perform TEST VER-2A.

TEST TC-142D - GOVERNOR PRESSURE ABOVE 3 PSI IN GEAR WITH

ZERO MPH

Note. Perform TEST TC-142A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, actuate governor pressure solenoid at zero percent duty cycle and read governor pressure sensor volts. If voltage cycles between 0.0 and 3.8 volts, go to step 3). If voltage does not cycle between 0.0 and 3.8 volts go to next step.
2. Turn engine off. Install a pressure gauge on transmission at governor pressure port. (Scheme 85) Start engine and compare scan tool and gauge readings. If readings are within 10 psi of each other, perform TEST TC-142C. If readings are not within 10 psi of each other, perform TEST TC-142B.
3. Drive vehicle at 20 MPH. Using scan tool, monitor governor pressure and target pressure. If pressures do not stay consistently within 5 psi of each other, perform TEST TC-142C. If pressures stay consistently within 5 psi of each other, no problem is found at this time. See «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition). Test is complete. Perform TEST VER-2A.

TEST TC-142E - GOVERNOR PRESSURE ABOVE 3 PSI IN GEAR WITH

ZERO MPH

Note. Perform TEST TC-142A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of governor pressure sensor circuit (Light Green/Red wire) between transmission solenoid connector and PCM White connector. If resistance is 10 ohms or more, repair open governor pressure sensor circuit, perform TEST VER-2A. If resistance is less than 10 ohms, replace PCM and perform TEST VER-2A.

TEST TC-142F - GOVERNOR PRESSURE ABOVE 3 PSI IN GEAR WITH

ZERO MPH

Note. Perform TEST TC-142A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn engine off. Drain and remove transmission oil pan. Inspect pan for burnt oil and debris. Repair transmission as necessary and perform TEST VER-2A. If transmission is okay, go to next step.
2. Using an external ohmmeter, check resistance of governor pressure solenoid circuit (Violet wire) between solenoid pack connector (transmission side) and solenoid connector. If resistance is 10 ohms or more, repair open governor pressure solenoid circuit and perform TEST VER-2A. If resistance is less than 10 ohms, go to next step.
3. Check resistance of transmission relay output circuit (Blue wire) between solenoid pack connector (transmission side) and solenoid connector. If resistance is 10 ohms or more, repair open transmission relay output circuit and perform TEST VER-2A. If resistance is less than 10 ohms, replace governor pressure solenoid and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-142F to TEST TC-147A. No tests have been omitted.

TEST TC-147A - POST-CATALYST O2S SHORTED TO VOLTAGE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Warm engine to normal operating temperature. Wait 4 minutes with engine running. Using scan tool, read Pre-Catalyst (PRE-CAT) Oxygen Sensor (O2S) voltage. If voltage is more than 1.5 volts, go to step 5). If voltage is 1.5 volts or less, go to next step.
2. Wiggle wiring harness and connector at POST-CAT O2S while monitoring scan tool. If voltage increases to more than 1.5 volts at any time when moving wiring harness, repair wiring harness and connector as necessary and perform TEST VER-5A. If voltage does not increase to more than 1.5 volts at any time, go to next step.
3. Condition required to set DTC is not present at this time. POST-CAT O2S SHORTED TO VOLTAGE DTC sets if POST-CAT O2S voltage is more than 1.5 volts. Possible causes are: O2S output circuit shorted to another circuit, dirt or moisture in connectors causing voltage tracking, defective connections or wiring, defective O2S or PCM. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-5A. If wiring and connectors are okay, test is complete. Perform TEST VER-5A.
5. Disconnect POST-CAT O2S connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-5A. If connector and terminals are okay, go to next step.
6. Using scan tool, read POST-CAT O2S voltage. If voltage is 1.5 volts or less, replace POST-CAT O2S and perform TEST VER-5A. If voltage is more than 1.5 volts, go to next step.
7. Disconnect left O2S connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-5A. If connector and terminals are okay, go to next step.
8. Using scan tool, read left O2S voltage. If voltage is 4.97 volts or less, replace O2S and perform TEST VER-5A. If voltage is more than 4.97 volts, go to next stop.
9. Turn ignition off. Disconnect PCM Black connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-5A. If connectors and terminals are okay, go to next step.
10. Turn ignition on. Using an external voltmeter, check voltage between each O2S connector, ground circuit (Black/Light Blue wire) and signal circuit (Tan/Red wire on center O2S; Tan/White wire on left/upstream O2S; Black/Dark Green wire on right/upstream O2S; Orange/Black wire on post-catalyst O2S). If voltage on any circuits is more than 1.5 volts, repair short to voltage in circuits and perform TEST VER-2A. If voltage on all circuits is 1.5 volts or less, replace PCM and perform TEST VER-2A.

TEST TC-148A - TORQ CONV CLU NO RPM DROP AT LOCKUP

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read DTCs. If any DTC listed in TORQUE CONVERTOR CLUTCH (TCC) TESTS table is present, perform appropriate test(s). If no DTCs are present, go to next step. TORQUE CONVERTOR CLUTCH (TCC) TESTS DTC Message Test THROTTLE POSITION SENSOR VOLTAGE TOO LOW TEST TC-26A THROTTLE POSITION SENSOR VOLTAGE TOO HIGH TEST TC-27A PCM FAILURE EEPROM WRITE DENIED TEST TC-49A TORQUE CONVERTOR CLUTCH SOLENOID TEST TC-12A SPEED CONTROL SYSTEM (1) TEST TC-35A NO CRANK REFERENCE SIGNAL AT PCM TEST TC-40A (1) Any vehicle speed sensor signal DTC.
2. Check transmission fluid for proper level and for debris. Fill or repair transmission as necessary and perform TEST VER-2A. If fluid level and condition are okay, go to next step.
3. Remove Vehicle Speed Sensor (VSS) and check for correct gear. Replace gear if necessary and perform TEST VER-2A. If gear is okay, go to next step.
4. Reinstall VSS. Connect a 0-300 psi pressure gauge to transmission cooler output line. With an assistant, test drive vehicle. Ensure engine and transmission are at operating temperature. Note transmission pressure before lock-up. Go to next step.
5. Using scan tool, monitor TCC solenoid state. If transmission pressure does not increase when scan tool displays ENERGIZED (lock-up achieved), repair TCC solenoid and related components as necessary, and perform TEST VER-2A. If pressure increases, no problem is found at this time. Test is complete. Perform TEST VER-2A.

TEST TC-149A - FUEL LEVEL SENDING UNIT VOLTS TOO LOW

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read fuel level sending unit voltage. If voltage is less than 0.2 volt, go to step 5). If voltage is 0.2 volt or more, go to next step.
2. Wiggle connectors and harness from fuel tank sending unit to PCM and instrument cluster while observing scan tool display. If voltage changes while wiggling, repair connector or harness that caused voltage change and perform TEST VER-2A. If voltage does not change, go to next step.
3. Condition required to set DTC is not present at this time. FUEL LEVEL SENDING UNIT VOLTAGE TOO LOW DTC sets if Powertrain Control Module (PCM) senses less than 0.2 volt for 2 seconds while ignition is on. Possible causes are: fuel level sensor signal shorted to ground, defective fuel level sending unit, loss of fuel ignition switch output voltage, defective instrument cluster circuit board, defective PCM, defective connector terminals or connector wires. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, test is complete. Perform TEST VER-2A.
5. Disconnect fuel pump module connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary. If connector and terminals are okay, go to next step.
6. Using scan tool, read fuel level sending unit voltage. If voltage is more than 4.5 volts, replace fuel pump module and perform TEST VER-2A. If voltage is 4.5 volts or less, go to next step.
7. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
8. Using scan tool in ohmmeter mode, check resistance of PCM Gray connector, fuel level sensor OBD-II signal circuit (Light Blue/Black wire). If resistance is less than 5 ohms, repair short to ground in fuel level sensor OBD-II signal circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
9. Using an external ohmmeter, check resistance between PCM Gray connector, fuel level sensor OBD-II signal circuit (Light Blue/Black wire) and PCM Black connector, sensor ground circuit (Black/Light Blue wire). If resistance is less than 5 ohms, repair fuel level sensor OBD-II signal circuit for a short to sensor ground circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.

TEST TC-150A - FUEL LEVEL SENDING UNIT VOLTS TOO HIGH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read fuel level sending unit voltage. If voltage is more than 4.7 volts, go to step 5). If voltage is 4.7 volts or less, go to next step.
2. Wiggle connectors/harness from fuel tank sending unit to PCM and instrument cluster while observing scan tool display. If voltage changes while wiggling connectors/harness, repair connector or harness that caused voltage change and perform TEST VER-2A. If voltage does not change, go to next step.
3. Condition required to set DTC is not present at this time. FUEL LEVEL SENDING UNIT VOLTAGE TOO HIGH DTC sets if Powertrain Control Module (PCM) senses more than 4.7 volts for 2 seconds while ignition is on. Possible causes are: fuel level sensor open, defective fuel level sending unit, defective instrument cluster circuit board, defective PCM, defective connector terminals or connector wires. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, test is complete. Perform TEST VER-2A.
5. Disconnect fuel pump module connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary. If connector and terminals are okay, go to next step.
6. Connect a jumper wire between fuel pump connector, fuel level sensor OBD-II signal circuit (Light Blue/Black wire) and sensor ground circuit (Black/Light Blue wire). Go to next step.
7. Using scan tool, read fuel level sending unit voltage. If voltage is less than one volt, replace fuel pump module and perform TEST VER-2A. If voltage is one volt or more, go to next step.
8. Move jumper wire from fuel pump connector, sensor ground circuit (Black/Light Blue wire) to engine ground. If voltage less than one volt, repair open sensor ground circuit and perform TEST VER-2A. if voltage is one volt or more go to next step.
9. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
10. Using an external ohmmeter, check resistance of fuel level sensor OBD-II signal circuit (Light Blue/Black wire) between PCM Gray connector and fuel pump module connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A. If resistance is 5 ohms or more, repair open fuel level sensor OBD-II signal circuit and perform TEST VER-2A.

TEST TC-151A - FUEL LEVEL UNIT NO CHANGE OVER MILES

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Ensure fuel tank is 1/4 full. Using scan tool, read and note fuel level sending unit voltage. If voltage is less than 0.2 volt, perform TEST TC-149A. If voltage is more than 4.7 volts, perform TEST TC-150A. If voltage is not 2.5-4.7 volts, go to step 5). If voltage is 2.5-4.7 volts, go to next step.
2. Add 5 gallons of fuel to fuel tank. Using scan tool, read fuel level sending unit voltage. If voltage does not decrease by at least 0.2 volt, replace fuel pump module and perform TEST VER-2A. If voltage decreases by at least 0.2 volt, go to next step.
3. Condition required to set DTC is not present at this time. FUEL LEVEL UNIT NO CHANGE OVER MILES DTC sets if Powertrain Control Module (PCM) does not sense fuel level signal circuit voltage change a calibrated amount over a calculated number of miles. Possible causes are: open sensor signal circuit, defective fuel level sending unit, defective PCM, or defective connections or wiring. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, test is complete. Perform TEST VER-2A.
5. Condition required to set DTC is not present at this time. FUEL LEVEL UNIT NO CHANGE OVER MILES DTC sets if Powertrain Control Module (PCM) does not sense fuel level signal circuit voltage change a calibrated amount over a calculated number of miles. Possible causes are: open sensor signal circuit, defective fuel level sending unit, defective PCM, or defective connections or wiring. Go to next step.
6. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, test is complete. Perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-151A to TEST TC-153A. No tests have been omitted.

TEST TC-153A - BATTERY TEMP SENSOR VOLTAGE TOO LOW/TOO HIGH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read Battery Temperature (BT) sensor voltage. If voltage is less than 0.4 volt, go to step 5). If voltage is more than 4.9 volts, perform TEST TC-153B. If voltage is 0.4-4.9 volts, go to next step.
2. Wiggle connectors and harness from BT sensor to Powertrain Control Module (PCM) while observing scan tool display. If voltage changes while wiggling connectors and harness, repair connector or harness that caused voltage change and perform TEST VER-2A. If voltage does not change, go to next step.
3. Condition required to set DTC is not present at this time. BATTERY TEMP SENSOR VOLTAGE TOO HIGH or TOO LOW DTC sets if PCM senses voltage from BT sensor to be either less than 0.5 volt or more than 4.9 volts for 3 seconds with ignition on. Possible causes are: defective PCM, defective connector terminals, defective BT sensor or connector wires. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, see INACTIVE DTC CONDITION. Test is complete. Perform TEST VER-2A.
5. Disconnect BT sensor connector. Using scan tool, read BT sensor voltage. If voltage is more than 4 volts, replace BT sensor and perform TEST VER-2A. If voltage is 4 volts or less, go to next step.
6. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
7. Using scan tool in ohmmeter mode, check resistance of BT sensor connector, BT sensor signal circuit (Pink/Yellow wire). If resistance is less than 5 ohms, repair short to ground in BT sensor signal circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
8. Using an external ohmmeter, check resistance of BT sensor signal circuit (Pink/Yellow wire) between BT sensor connector and PCM Gray connector. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A. If resistance is less than 5 ohms, repair short to ground in sensor signal circuit and perform TEST VER-2A.

TEST TC-153B - BATTERY TEMP SENSOR VOLTAGE TOO LOW/TOO HIGH

Note. Perform TEST TC-153A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Disconnect Battery Temperature (BT) sensor connector. Connect a jumper wire between BT sensor connector, BT sensor signal circuit (Pink/Yellow wire) and ground circuit (Black/Light Blue wire). Go to next step.
2. Using scan tool, read BT sensor voltage. If voltage is less than one volt, replace BT sensor and perform TEST VER-2A. If voltage is one volt or more, go to next step.
3. Move jumper wire from BT sensor connector, ground circuit (Black/Light Blue wire) to engine ground. Read BT sensor voltage. If voltage is less than one volt, repair open ground circuit and perform TEST VER-2A. If voltage is one volt or more, go to next step.
4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using an external ohmmeter, check resistance of BT sensor signal circuit (Pink/Yellow wire) between BT sensor connector and PCM Gray connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A. If resistance is 5 ohms or more, repair open BT sensor signal circuit and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-153B to TEST TC-155A. No tests have been omitted.

TEST TC-155A - UPSTREAM O2S VOLTAGE SHORTED TO GROUND

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. UPSTREAM O2S VOLTAGE SHORTED TO GROUND DTC sets if PCM senses Oxygen Sensor (O2S) voltage is less than 0.156 volt for 28 seconds after starting engine. Possible causes are: O2S output wire shorted to another circuit, dirty or wet connection causing voltage tracking in connector, defective O2S, defective Powertrain Control Module (PCM), defective connector terminals or connector wires. Go to next step.
2. If engine is warm, turn engine off and allow it to cool for at least 15 minutes. Turn ignition on, engine off. Go to next step.
3. Using scan tool, read left/upstream O2S voltage. If voltage is less than 0.16 volt, go to step 5). If voltage is 0.16 volt or more, go to next step.
4. Wiggle wiring harness and connector going to left/upstream O2S while monitoring voltage. If voltage changes while wiggling wiring harness, repair wiring harness and connector as necessary and perform TEST VER-5A. If voltage does not change while wiggling wiring harness, condition required to set DTC is not present at this time. See INACTIVE DTC CONDITION. Test is complete. Perform TEST VER-5A.
5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-5A. If connectors and terminals are okay, go to next step.
6. Disconnect left/upstream O2S connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-5A. If connector and terminals are okay, go to next step.
7. Using an external in ohmmeter, check resistance of O2S signal circuit (Black/Light Green wire) between O2S connector and PCM Black connector. If resistance is less than 5 ohms, repair short to ground in O2S signal circuit and perform TEST VER-5A. If resistance is 5 ohms or more, go to next step.
8. Using scan tool, perform wiggle test. If resistance changes when performing wiggle test, repair short to ground in O2S signal circuit (Black/Light Green wire) and perform TEST VER-5A. If resistance does not change, replace PCM and perform TEST VER-5A.

TEST TC-156A - PRE-CAT/DOWNSTREAM O2S VOLTAGE SHORTED TO

GROUND

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. DOWNSTREAM O2S VOLTAGE SHORTED TO GROUND DTC sets if PCM senses Oxygen Sensor (O2S) voltage is less than 0.156 volt prior to heater test. Possible causes are: O2S output wire shorted to another circuit, dirty or wet connection causing voltage tracking in connector, defective O2S, defective Powertrain Control Module (PCM), defective connector terminals or connector wires. Go to next step.
2. If engine is warm, turn engine off and allow it to cool for at least 15 minutes. Turn ignition on, engine off. Go to next step.
3. Using scan tool, read Pre-Catalyst (PRE-CAT)/downstream O2S voltage. If voltage is less than 0.16 volt, go to step 5). If voltage is 0.16 volt or more, go to next step.
4. Using scan tool, perform wiggle test while monitoring PRE-CAT/downstream voltage. If voltage changes when performing wiggle test, repair short to ground in wiring harness as necessary and perform TEST VER-5A. If voltage does not change, condition required to set DTC is not present at this time. See «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-5A.
5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-5A. If connectors and terminals are okay, go to next step.
6. Disconnect PRE-CAT/downstream O2S connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-5A. If connector and terminals are okay, go to next step.
7. Using an external in ohmmeter, check resistance of O2S signal circuit (Black/Light Green wire) between O2S connector and PCM Black connector. If resistance is less than 5 ohms, repair short to ground in O2S signal circuit and perform TEST VER-5A. If resistance is 5 ohms or more, go to next step.
8. Using scan tool, perform wiggle test. If resistance changes when performing wiggle test, repair short to ground in O2S signal circuit (Black/Light Green wire) and perform TEST VER-5A. If resistance does not change, replace PCM and perform TEST VER-5A.

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

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Note. After each repair, perform TEST VER-2A.

1. INTERMITTENT LOSS OF CMP OR CKP DTC sets when expected Camshaft Position (CMP) sensor signal level disagrees with actual CMP signal level. Possible causes are: open or shorted 5-volt supply circuit, open sensor ground, open or shorted signal circuit, excessive clearance between Crankshaft Position (CKP) sensor and crankshaft pulse ring, excessive clearance between CKP sensor and target magnet, damaged target magnet, defective sensor or defective PCM. Go to next step.
2. If vehicle is not equipped with a distributor, go to next step. If equipped, use scan tool in set sync mode to check distributor position. Set distributor to specs using procedure in TEST NS-8A if necessary and perform TEST VER-2A. If distributor is set to specification, go to next step. NOTE: Refer to manufacturer's operation manual for instructions in use of oscilloscope and procedure for pattern analysis.
3. If not using an oscilloscope for diagnosis, perform TEST TC-157B. If using oscilloscope, with CMP sensor connected, backprobe oscilloscope's voltage lead at CMP sensor connector, CMP signal circuit (Tan/Yellow wire). Start engine. If sensor signal pattern is consistent, go to step 6). If sensor signal pattern is not consistent, go to next step.
4. Turn ignition off. Disconnect CMP sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
5. Disconnect Powertrain Control Module (PCM) Black connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, perform TEST TC-157C.
6. Backprobe oscilloscope's voltage lead at PCM Black connector, CMP signal circuit (Tan/Yellow wire). Wiggle wiring harness from PCM to CMP sensor while observing oscilloscope pattern. If sensor signal does not remain consistent while wiggling wiring harness, repair wiring harness as necessary where wiggling caused inconsistent pattern and perform TEST VER-2A. If sensor signal is consistent, go to next step.
7. With CKP sensor connected, backprobe oscilloscope's voltage lead at CKP sensor connector, CKP sensor circuit (Gray/Black wire). Start engine. If sensor signal pattern is consistent, go to step 10). If sensor signal pattern is not consistent, go to next step.
8. Turn ignition off. Disconnect CKP sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
9. Disconnect Powertrain Control Module (PCM) Black connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, perform TEST TC-157D.
10. Using oscilloscope's voltage lead, backprobe at PCM Black connector, CKP signal circuit (Gray/Black wire). Wiggle wiring harness from PCM to CKP sensor while observing oscilloscope pattern. If sensor signal does not remain consistent while wiggling wiring harness, repair wiring harness as necessary where wiggling caused inconsistent pattern and perform TEST VER-2A. If sensor signal is consistent, go to next step.
11. Condition required to set DTC is not present at this time. See «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-2A.

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

Note. Perform TEST TC-157A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) Black connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Disconnect CMP sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
3. Disconnect CKP sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
4. Reconnect PCM, CMP and CKP connectors. Start engine and allow it to idle. Go to next step.
5. Using scan tool, read engine speed (RPM) while wiggling CMP and CKP wiring harness. If RPM changes while wiggling wiring harness, repair wiring harness as necessary and perform TEST VER-2A. If RPM does not change, go to next step.
6. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
7. Condition required to set DTC is not present at this time. INTERMITTENT LOSS OF CMP or CKP DTC sets when PCM senses a cam signal level that disagrees with actual cam signal level. Possible causes are: open or shorted 5-volt supply circuit, open sensor ground, open or shorted signal circuit, excessive clearance between crankshaft sensor and crankshaft pulse ring, excessive clearance between crankshaft sensor and target magnet, damaged target magnet, failed sensor or failed PCM. Go to next step.
8. See «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) S. Test is complete. Perform TEST VER-2A.

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

Note. Perform TEST TC-157A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. If vehicle is equipped with a distributor, go to next step. On all other vehicles, remove CMP sensor and inspect camshaft sprocket. Repair camshaft sprocket as necessary and perform TEST VER-2A. If camshaft sprocket is okay, replace CMP sensor and perform TEST VER-2A.
2. Remove distributor cap. Inspect distributor rotor and drive for looseness. Repair distributor rotor and drive looseness as necessary and perform TEST VER-2A. If distributor rotor and drive are okay, replace CMP sensor and perform TEST VER-2A.

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

Note. Perform TEST TC-157A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Remove CKP sensor. Inspect flywheel for damage. Repair flywheel as necessary and perform TEST VER-2A. If flywheel is okay, replace CKP sensor and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-157D to TEST TC-160A. No tests have been omitted.

TEST TC-160A - EVAP LEAK MONITOR SMALL LEAK DETECTED

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. DTC may be set by defective secondary seal on fuel filler neck, or a loose or missing fuel tank cap. Ensure fuel tank is at least 1/2 full. Using Evaporative (EVAP) System Testing Kit (6872A) and instructions printed on its cover, perform pressure pump self-test. Go to next step.
2. Connect EVAP system pressure pump supply hose to Leak Detection Pump (LDP) test port. Set pressure hold to OPEN and set vent to CLOSED. Turn pump timer on and go to next step.
3. Connect a vacuum pump to EVAP system testing kit vacuum tee and apply 18 in. Hg of vacuum to LDP. If LDP does not hold vacuum, repair LDP vacuum supply line for leak and repeat this step to verify repair. If LDP holds vacuum, go to next step.
4. Turn ignition on. Using scan tool, actuate LDP solenoid while monitoring EVAP system testing kit vacuum gauge. If vacuum does not drop when solenoid is actuated, replace LDP and repeat this step to verify repair. If vacuum drops when solenoid is actuated, go to next step.
5. Using vacuum pump, raise vacuum to 18 in. Hg vacuum. Using EVAP system testing kit, perform IM240 simulation (as described on cover of testing kit) while monitoring vacuum reading. If vacuum decreases more than 8 in. Hg in 2 minutes, go to step 8). If vacuum does not decrease more than 8 in. Hg in 2 minutes, go to next step.
6. Condition required to set DTC is not present at this time. EVAP SYSTEM SMALL LEAK DTC sets if a leak larger than .040" and smaller than .080" exists in EVAP system. Possible causes are: defective LDP or a leak larger than .040 inches and smaller than .080" in EVAP system. Go to next step.
7. Inspect all related hoses, wiring and connectors for damage. Repair hoses, wiring and connectors as necessary and perform TEST VER-5A. If hoses, wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-5A.
8. Set pressure hold to OPEN and set vent to OPEN. Turn pump timer on. Move EVAP system testing kit away from vehicle to prevent operating noise from interfering with test procedures. Go to next step.
9. Using Ultrasonic Leak Detector (6904), check for leaks at fuel tank cap, fuel tank rollover valve, charcoal canister, LDP, and EVAP purge solenoid. Repair or replace leaking component as necessary and perform TEST VER-5A. If no leaks exist, replace LDP and perform TEST VER-5A.

TEST TC-161A - EVAP LEAK MONITOR LARGE LEAK DETECTED

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. DTC may be set by defective secondary seal on fuel filler neck, or a loose or missing fuel tank cap. Ensure fuel tank is at least 1/2 full. Using Evaporative (EVAP) System Testing Kit (6872A) and instructions printed on its cover, perform pressure pump self-test. Go to next step.
2. Connect EVAP system testing kit pressure pump supply hose to Leak Detection Pump (LDP) test port. Set pressure hold to OPEN and set vent to CLOSED. Turn pump timer on and go to next step.
3. Connect a vacuum pump to EVAP system testing kit vacuum tee and apply 18 in. Hg of vacuum to LDP. If LDP does not hold vacuum, repair LDP vacuum supply line for leak and repeat this step to verify repair. If LDP holds vacuum, go to next step.
4. Turn ignition on. Using scan tool, actuate LDP solenoid while monitoring EVAP system testing kit vacuum gauge. If vacuum does not drop when solenoid is actuated, replace LDP and repeat this step to verify repair. If vacuum drops when solenoid is actuated, go to next step.
5. Using vacuum pump, raise vacuum to 18 in. Hg vacuum. EVAP system Using testing kit, perform IM240 simulation (as described on cover of testing kit) while monitoring vacuum reading. If vacuum decreases more than 8 in. Hg in 2 minutes, go to step 8). If vacuum does not decrease more than 8 in. Hg in 2 minutes, go to next step.
6. Condition required to set DTC is not present at this time. EVAP SYSTEM GROSS LEAK DTC sets if a leak larger than .080" exists in EVAP system. Possible causes are: defective LDP or a leak larger than .080" in EVAP system. Go to next step.
7. Inspect all related hoses, wiring and connectors for damage. Repair hoses, wiring and connectors as necessary and perform TEST VER-5A. If hoses, wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-5A.
8. Set pressure hold to OPEN and set vent to CLOSED. Turn pump timer on. Move EVAP system testing kit away from vehicle to prevent operating noise from interfering with test procedures. If pump noise still interferes with test procedures, turn pressure hold to CLOSED and turn pump timer off. Go to next step.
9. Ensure EVAP system is under pressure. If EVAP system is not under pressure, leave pump timer on and turn pressure hold to OPEN. Using Ultrasonic Leak Detector (6904), check for leaks at fuel tank cap, fuel tank rollover valve, charcoal canister, LDP, and EVAP purge solenoid. Repair or replace leaking component as necessary and perform TEST VER-5A. If no leaks exist, replace LDP and filter, and perform TEST VER-5A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-161A to TEST TC-164A. No tests have been omitted.

TEST TC-164A - TRANS TEMP SENSOR NO RISE AFTER START

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Note. To test Transmission Temperature (TRANS TEMP) sensor, engine and transmission must be at ambient temperature.

1. Ensure engine and transmission are at ambient temperature. Using scan tool, read DTCs. If P/N SWITCH, TRANS TEMP SENSOR VOLTAGE TOO LOW or TRANS TEMP SENSOR VOLTAGE TOO HIGH DTC is present, repair these DTCs before proceeding. If none of these DTCs are present, go to next step.
2. Using scan tool, read TRANS TEMP sensor voltage. If voltage is less than 1.4 volts, perform TEST TC-74A. If voltage is more than 4 volts, perform TEST TC-75A. If voltage is 1.4-4.0 volts, go to next step.
3. Using scan tool, read and record Engine Coolant Temperature (ECT) sensor temperature, Battery (BATT) temperature, and TRANS TEMP sensor temperature. If TRANS TEMP is within 9 degrees of ECT or BATT temperature, go to step 5). If TRANS TEMP is not within 9 degrees of ECT or BATT temperature, go to next step.
4. Start engine and let it idle in gear, with brake on. Monitor TRANS TEMP sensor. If TRANS TEMP increases steadily 15°F over a 10 minute period, TRANS TEMP sensor is functioning properly at this time. Perform TEST VER-2A. If TRANS TEMP does not increase steadily 15°F over a 10 minute period, go to next step.
5. Disconnect transmission solenoid 8-pin connector. Inspect connector and terminals for damage. Repair as necessary and perform TEST VER-2A. If connector and terminals are okay, replace TRANS TEMP/governor pressure sensor and perform TEST VER-2A.

TEST TC-165A - 3-4 SHIFT SOLENOID NO RPM DROP 3-4 SHIFT

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read DTCs. If any DTC listed in 3-4 SHIFT SOLENOID TESTS table is present, perform appropriate test(s). If no DTCs are present, go to next step. 3-4 SHIFT SOLENOID TESTS DTC Message Test NO CAM SIGNAL AT PCM TEST TC-1A P/N SWITCH STUCK IN PARK OR IN GEAR TEST TC-114A THROTTLE POSITION SENSOR VOLTAGE TOO LOW TEST TC-26A THROTTLE POSITION SENSOR VOLTAGE TOO HIGH TEST TC-27A TORQUE CONVERTOR CLUTCH SOLENOID TEST TC-12A TPS VOLTAGE DOES NOT AGREE WITH MAP TEST TC-132A TRANS 12-VOLT SUPPLY RELAY CNTRL CIRCUIT TEST TC-173A 3-4 SHIFT SOLENOID/TRANS RELAY CIRCUIT TEST TC-50A
2. Check transmission fluid for proper level and for debris. Fill or repair transmission as necessary and perform TEST VER-2A. If fluid level and condition are okay, go to next step.
3. Remove Vehicle Speed Sensor (VSS) and check for correct gear. Replace gear if necessary and perform TEST VER-2A. If gear is okay, go to next step.
4. Reinstall VSS. Connect a 0-300 psi pressure gauge to transmission overdrive clutch test port. (Scheme 86) With an assistant, test drive vehicle. Ensure engine and transmission are at operating temperature. Note transmission pressure before lock-up. Go to next step.
5. Using scan tool monitor 3-4 solenoid state. If transmission pressure does not increase when scan tool displays ENERGIZED (3-4 shift achieved), repair 3-4 solenoid and related components as necessary and perform TEST VER-2A. If pressure increases, no problem is found at this time. Test is complete. Perform TEST VER-2A.

Identifying Overdrive Clutch Test Port. Scheme 86

TEST TC-166A - LOW OUTPUT SPEED SENSOR RPM ABOVE 15 MPH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read DTCs. If P/N SWITCH STUCK IN PARK OR IN GEAR DTC is present, repair this DTC before proceeding. If DTC is not present, go to next step. WARNING: Keep hands and feet clear of rotating wheels.
2. Raise and support vehicle so drive wheels are free to rotate. Start engine. Using scan tool, read Output Speed Sensor (OSS) signal. Place transmission in any forward gear. If scan tool displays zero MPH, go to step 5). If scan tool displays more than zero MPH, go to next step.
3. Condition required to set DTC is not present at this time. LOW OUTPUT SPEED SENSOR RPM DTC sets if no OSS signal (23 pulses per output shaft revolution) is received at Powertrain Control Module (PCM). Possible causes are: defective OSS, defective connections, no pulses, defective wiring, or defective PCM. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-1A. If wiring and connectors are okay, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . VSS test okay at this time. Perform TEST VER-1A.
5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-1A. If connectors and terminals are okay, go to next step.
6. Using scan tool in ohmmeter mode, check resistance of PCM White connector, OSS signal circuit (Light Green/White wire). If resistance is 5 ohms or more, go to step 9). If resistance is less than 5 ohms, go to next step.
7. Disconnect OSS connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-1A. If connector and terminals are okay, go to next step.
8. Check resistance of PCM White connector, OSS signal circuit (Light Green/White wire). If resistance is 5 ohms or more, replace OSS and perform TEST VER-1A. If resistance is less than 5 ohms, repair short to ground in OSS signal circuit and perform TEST VER-1A.
9. Using an external ohmmeter, check resistance between PCM White connector, OSS signal circuit (Light Green/White wire) and OSS ground circuit (Dark Blue/Black wire). If resistance is 300-1200 ohms, replace PCM and perform TEST VER-1A. If resistance is not 300-1200 ohms, go to next step.
10. Disconnect OSS connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-1A. If connector and terminals are okay, go to next step.
11. Check resistance of OSS signal circuit (Light Green/White wire) between PCM white connector and OSS connector. If resistance is 5 ohms or more, repair open OSS signal circuit and perform TEST VER-1A. If resistance is less than 5 ohms, go to next step.
12. Check resistance of OSS ground circuit (Dark Blue/Black) between PCM White connector and OSS connector. If resistance is 5 ohms or more, repair open OSS ground circuit and perform TEST VER-1A. If resistance is less than 5 ohms, replace OSS and perform TEST VER-1A.

TEST TC-167A - GOVERNOR PRESSURE SENSOR VOLTS TOO LOW

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition on. Using scan tool, read GOV PRESSURE voltage. If voltage is 0.0-3.8 volts, perform TEST TC-167B. If voltage is not 0.0-3.8 volts, go to next step.
2. Wiggle wiring harness from PCM to governor pressure sensor while monitoring GOV PRESSURE voltage. If voltage changes while wiggling wiring harness, repair short to ground in governor pressure sensor signal circuit (Light Green/Red wire) and perform TEST VER-2A. If voltage does not change, go next step.
3. Condition required to set DTC is not present at this time. GOVERNOR PRESSURE SENSOR VOLTS TOO LOW DTC sets if governor pressure sensor input is less than 0.1 volt for 8.36 seconds. Possible causes are: defective PCM, internally shorted or open, incorrectly wired, dirty or corroded connector, or open or shorted wiring. Go to next step.
4. Test is complete. See «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Perform TEST VER-2A.

TEST TC-167B - GOVERNOR PRESSURE SENSOR VOLTS TOO LOW

Note. Perform TEST TC-167A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of governor pressure sensor signal circuit (Light Green/Red wire) between transmission solenoid connector and engine ground. If resistance is less than 5 ohms, repair short to ground in governor pressure sensor signal circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
3. Turn ignition off. Check resistance between transmission solenoid connector, governor pressure sensor signal circuit (Light Green/Red wire) and 5-volt supply circuit (Orange wire). If resistance is less than 5 ohms, go to step 5). If resistance is 5 ohms or more, go to next step.
4. Check resistance of governor pressure sensor signal circuit (Light Green/Red wire) between transmission solenoid connector and PCM. If resistance is 5 ohms or more, repair open governor pressure sensor signal circuit and perform TEST VER-2A. If resistance is less than 5 ohms, perform TEST TC-167C.
5. Disconnect PCM connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
6. Check resistance between transmission solenoid connector, governor pressure sensor signal circuit (Light Green/Red wire) and 5-volt supply circuit (Orange wire). If resistance is less than 5 ohms, repair governor pressure sensor signal circuit for a short to 5-volt supply circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.

TEST TC-167C - GOVERNOR PRESSURE SENSOR VOLTS TOO LOW

Note. Perform TEST TC-167B before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Disconnect governor pressure sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance between governor pressure sensor connector, governor pressure signal circuit (White wire) and sensor ground circuit (Green wire). If resistance is less than 5 ohms, replace transmission solenoid pack wiring harness and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
3. Check resistance of governor pressure signal circuit (White wire) between governor pressure sensor connector and transmission solenoid pack connector. If resistance is less than 5 ohms, replace governor pressure sensor and perform TEST VER-2A. If resistance is 5 ohms or more, replace transmission solenoid pack wiring harness and perform TEST VER-2A.

TEST TC-168A - GOVERNOR PRESSURE SENSOR VOLTS TOO HIGH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition on. Using scan tool, read GOV PRESSURE voltage. If voltage is 3.75 volts, perform TEST TC-168B. If voltage is not 3.75 volts, go to next step.
2. Wiggle wiring harness from PCM to governor pressure sensor while monitoring GOV PRESSURE voltage. If voltage changes while wiggling wiring harness, repair short to ground in governor pressure sensor signal circuit (Light Green/Red wire) and perform TEST VER-2A. If voltage does not change, go next step.
3. Condition required to set DTC is not present at this time. GOVERNOR PRESSURE SENSOR VOLTS TOO HIGH DTC sets if governor pressure sensor input is more than 4.89 volts for 8.36 seconds. Possible causes are: defective PCM, internally shorted or open, incorrectly wired, dirty or corroded connector, or open or shorted wiring. Go to next step.
4. Test is complete. See «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Perform TEST VER-2A.

TEST TC-168B - GOVERNOR PRESSURE SENSOR VOLTS TOO HIGH

Note. Perform TEST TC-168A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external voltmeter, check voltage on governor pressure sensor signal circuit (Light Green/Red wire) between transmission solenoid connector and engine ground. If voltage is more than 5.75 volts, repair short to ground in governor pressure sensor signal circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
3. Turn ignition off. Check resistance between transmission solenoid connector, governor pressure sensor signal circuit (Light Green/Red wire) and 5-volt supply circuit (Orange wire). If resistance is less than 5 ohms, go to step 5). If resistance is 5 ohms or more, go to next step.
4. Check resistance of governor pressure sensor signal circuit (Light Green/Red wire) between transmission solenoid connector and PCM. If resistance is 5 ohms or more, repair open governor pressure sensor signal circuit and perform TEST VER-2A. If resistance is less than 5 ohms, perform TEST TC-168C.
5. Disconnect PCM connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
6. Check resistance between transmission solenoid connector, governor pressure sensor signal circuit (Light Green/Red wire) and 5-volt supply circuit (Orange wire). If resistance is less than 5 ohms, repair governor pressure sensor signal circuit for a short to 5-volt supply circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.

TEST TC-168C - GOVERNOR PRESSURE SENSOR VOLTS TOO LOW

Note. Perform TEST TC-168B before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Disconnect governor pressure sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance between governor pressure sensor connector, governor pressure signal circuit (White wire) and 5-volt supply circuit (Red wire). If resistance is less than 5 ohms, replace transmission solenoid pack wiring harness and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
3. Check resistance of governor pressure signal circuit (White wire) between governor pressure sensor connector and transmission solenoid pack connector. If resistance is less than 5 ohms, replace governor pressure sensor and perform TEST VER-2A. If resistance is 5 ohms or more, replace transmission solenoid pack wiring harness and perform TEST VER-2A.

TEST TC-169A - GOV PRESS SEN OFFSET VOLTS TOO LOW OR TOO HIGH

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Start engine and allow it to reach operating temperature. Check transmission fluid level and condition. Correct transmission fluid level or condition as necessary and perform TEST VER-2A. If transmission fluid level and condition are okay, go to next step.
2. Check Park Neutral (P/N) switch operation. Repair P/N switch as necessary and perform TEST VER-2A. If P/N switch operation is okay, go to next step.
3. Put gear selector in Neutral. Using scan tool, read GOV PRESSURE voltage. If voltage is not 0.30-0.76 volt, go to step 5). If voltage is 0.30-0.76 volt, go to next step.
4. Condition required to set DTC is not present at this time. GOV PRESS SENS VOLTS TOO LOW or TOO HIGH DTC sets if governor pressure sensor input is less than or more than a predetermined P/N switch calibration for 1.32 seconds under predetermined conditions. Possible causes are: defective governor pressure sensor, shorted or open 5-volt supply circuit, or defective powertrain control module. Test is complete. Perform TEST VER-2A.
5. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Turn ignition on. Using scan tool in voltmeter mode, check voltage on transmission solenoid connector, 5-volt supply circuit (Orange wire). If voltage is less than 5 volts, repair open 5-volt supply circuit and perform TEST VER-2A. If voltage is 5 volts or more, go to next step.
7. Turn ignition off. Using scan tool in ohmmeter mode, check resistance of transmission solenoid connector, ground circuit (Black/Light Blue wire). If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
8. Drain and remove transmission pan. Using scan tool, perform OHM TEST on internal transmission wiring harness. Repair wiring harness as necessary and perform TEST VER-2A. If wiring harness is okay, replace governor pressure sensor and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-169A to TEST TC-171A. No tests have been omitted.

TEST TC-171A - GOVERNOR PRESSURE SOLENOID/TRANS RELAY CKTS

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
2. Disconnect transmission relay connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
3. Turn ignition on. Using an external voltmeter, check voltage between PCM White connector, governor pressure solenoid control circuit (Pink wire) and engine ground. If voltage is more than one volt, go to step 6). If voltage is one volt or less, go to next step.
4. Turn ignition off. Using an external ohmmeter, check resistance between PCM White connector, governor pressure solenoid control circuit (Pink wire), and transmission relay connector, transmission control relay output circuit (Light Blue wire). If resistance is 10 ohms or more, perform TEST TC-171B. If resistance is 3 ohms or less, perform TEST TC-171C. If resistance is 3-10 ohms, go to next step.
5. Using an external ohmmeter, check resistance between PCM White connector, governor pressure solenoid control circuit (Pink wire), and engine ground. If resistance is less than 5 ohms, perform TEST TC-171D. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.
6. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
7. Turn ignition on. Using scan tool in voltmeter mode, check voltage on transmission solenoid connector, governor pressure solenoid control circuit (Pink wire), and engine ground. If voltage is more than one volt, repair short to voltage in governor pressure solenoid control circuit and perform TEST VER-2A. If voltage is one volt or less, go to next step.
8. Check voltage on transmission relay connector, governor pressure solenoid control circuit (Pink wire), and engine ground. If voltage is more than one volt, repair short to voltage in transmission control relay output circuit (Light Blue wire) and perform TEST VER-2A. If voltage is one volt or less, go to next step.
9. Reconnect transmission solenoid connector. Drain and remove transmission pan. Disconnect governor pressure solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
10. Turn ignition on. Check voltage on PCM White connector, governor pressure solenoid control circuit (Pink wire), and engine ground. If voltage is more than one volt, replace internal transmission wiring harness and perform TEST VER-2A. If voltage is one volt or less, go to next step.
11. Check voltage on transmission relay connector, transmission control relay output circuit (Light Blue wire). If voltage is more than one volt, replace internal transmission wiring harness and perform TEST VER-2A. If voltage is one volt or less, replace governor pressure solenoid and perform TEST VER-2A.

TEST TC-171B - GOVERNOR PRESSURE SOLENOID/TRANS RELAY CKTS

Note. Perform TEST TC-171A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of transmission relay control circuit (Violet/Light Blue wire) between transmission solenoid connector and Powertrain Control Module (PCM). If resistance is 5 ohms or more, repair open transmission relay control circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
3. Check resistance of transmission control relay output circuit (Light Blue wire) between transmission relay connector and transmission solenoid connector. If resistance is more than 5 ohms, repair open transmission control relay output circuit and perform TEST VER-2A. If resistance is 5 ohms or less, go to next step.
4. Drain and remove transmission pan. Disconnect governor pressure solenoid connector. Inspect connector/terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
5. Check resistance across governor pressure solenoid terminals. If resistance 8 ohms or less, replace internal transmission wiring harness and perform TEST VER-2A. If resistance more than 8 ohms, replace governor pressure solenoid and perform TEST VER-2A.

TEST TC-171C - GOVERNOR PRESSURE SOLENOID/TRANS RELAY CKTS

Note. Perform TEST TC-171A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of governor pressure solenoid circuit (Pink wire) between transmission relay connector and Powertrain Control Module (PCM). If resistance is more than 5 ohms, repair short in governor pressure solenoid circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
3. Drain and remove transmission pan. Reconnect transmission solenoid connector. Disconnect governor pressure solenoid connector. Check resistance of governor pressure solenoid circuit (Pink wire) between transmission relay connector and Powertrain Control Module (PCM). If resistance is less than 5 ohms, replace internal transmission wiring harness and perform TEST VER-2A. If resistance is 5 ohms or more, replace governor pressure solenoid and perform TEST VER-2A.

TEST TC-171D - GOVERNOR PRESSURE SOLENOID CIRCUIT

Note. Perform TEST TC-171A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of governor pressure solenoid circuit (Pink wire) between Powertrain Control Module (PCM) White connector and engine ground. If resistance is less than 5 ohms, repair short to ground in governor pressure solenoid circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
3. Check resistance of governor pressure solenoid circuit (Pink wire) between transmission relay connector and engine ground. If resistance is less than 5 ohms, repair short to ground in governor pressure solenoid circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
4. Drain and remove transmission pan. Reconnect transmission solenoid connector. Disconnect governor pressure solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
5. Check resistance of governor pressure solenoid circuit (Pink wire) between PCM White connector and engine ground. If resistance is less than 5 ohms, replace internal transmission wiring harness and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
6. Check resistance of governor pressure solenoid circuit (Pink wire) between transmission relay connector and engine ground. If resistance is less than 5 ohms, replace internal transmission wiring harness and perform TEST VER-2A. If resistance is 5 ohms or more, replace governor pressure solenoid and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-171D to TEST TC-173A. No tests have been omitted.

TEST TC-173A - TRANS 12-VOLT SUPPLY RELAY CNTRL CIRCUIT

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, actuate transmission control relay. If transmission control relay does not click, go to step 5). If transmission control relay clicks, go to next step.
2. Condition required to set DTC is not present at this time. TRANS 12-VOLT SUPPLY RELAY CNTRL CIRCUIT DTC sets if transmission control relay is not in a state requested by Powertrain Control Module (PCM) for more than 3 seconds. Possible causes are: defective relay, open or shorted control circuit, defective PCM, or defective connector terminals. Go to next step.
3. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, go to next step.
4. Wiggle wiring harness from transmission control relay to PCM. Ensure scan tool is still actuating transmission control relay. If transmission control relay stops clicking, repair wiring harness as necessary and perform TEST VER-2A. If transmission control relay continues clicking, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition). Test is complete. Perform TEST VER-2A.
5. Remove transmission control relay. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Using scan tool in voltmeter mode, check voltage on transmission control relay connector, fused ignition switch output circuit (Light Green/Black wire). If voltage is 10 volts or less, repair open fused ignition switch output circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step.
7. Using an external ohmmeter, check resistance between transmission control relay terminals No. 85 and 86. (Scheme 82) If resistance is 100 ohms or more, replace transmission control relay and perform TEST VER-2A. If resistance is less than 100 ohms, go to next step.
8. Turn ignition off. Disconnect Powertrain Control Module (PCM) White connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
9. Using scan tool in ohmmeter mode, check resistance of PCM White connector, transmission relay control circuit (Violet/Light Blue wire). If resistance is less than 5 ohms, repair short to ground in transmission relay control circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
10. Using an external ohmmeter, check resistance of transmission relay control circuit (Violet/Light Blue wire) between transmission control relay connector and PCM White connector. If resistance is 5 ohms or more, repair open transmission relay control circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace PCM and perform TEST VER-2A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-173A to TEST TC-181A. No tests have been omitted.

TEST TC-181A - RIGHT/UPSTREAM O2S VOLTAGE SHORTED TO GROUND

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. RIGHT/UPSTREAM O2S VOLTAGE SHORTED TO GROUND DTC sets if PCM senses Oxygen Sensor (O2S) voltage is less than 0.156 volt for 28 seconds after starting engine. Possible causes are: O2S output circuit shorted to another circuit, dirty or wet connection causing voltage tracking in connector, defective O2S, defective Powertrain Control Module (PCM), defective connector terminals or connector wires. Go to next step.
2. If engine is warm, turn engine off and allow it to cool for at least 15 minutes. Turn ignition on, engine off. Go to next step.
3. Using scan tool, read right/upstream O2S voltage. If voltage is less than 0.16 volt, go to step 5). If voltage is 0.16 volt or more, go to next step.
4. Using scan tool, perform wiggle test while monitoring voltage. If voltage changes when performing wiggle test, repair wiring harness and connector as necessary and perform TEST VER-5A. If voltage does not change, condition required to set DTC is not present at this time. See «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-5A.
5. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-5A. If connectors and terminals are okay, go to next step.
6. Disconnect right/upstream O2S connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-5A. If connector and terminals are okay, go to next step.
7. Using an external ohmmeter, check resistance of O2S signal circuit (Black/Light Green wire) between 02S connector and PCM Black connector. If resistance is less than 5 ohms, repair short to ground in O2S signal circuit and perform TEST VER-5A. If resistance is 5 ohms or more, go to next step.
8. Using scan tool, perform wiggle test while monitoring scan tool. If resistance changes when performing wiggle test, repair short to ground in O2S signal circuit (Black/Light Green wire) and perform TEST VER-5A. If resistance does not change, replace PCM and perform TEST VER-5A.

Note. A break in test sequence occurs at this point. Sequence skips from TEST TC-181A to TEST TC-183A. No tests have been omitted.

TEST TC-183A - LEAK DETECTION PUMP SOLENOID CIRCUIT

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Start engine and allow it to idle. Using scan tool, read and note Leak Detection Pump (LDP) pressure switch status. Using scan tool, actuate LDP solenoid. If status does not switch from DOWN to UP, go to step 6). If status switches from DOWN to UP, go to next step.
2. Using scan tool, stop LDP solenoid actuation. Using scan tool, read LDP pressure switch status. If status does not switch from UP to DOWN, go to step 6). If status switches from UP to DOWN, go to next step.
3. Condition required to set DTC is not present at this time. LEAK DETECTION PUMP SOLENOID CKT DTC sets if Powertrain Control Module (PCM) does not sense state of solenoid changing. Possible causes are: open or shorted LDP solenoid control circuit, defective LDP solenoid, or open fused ignition switch. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-5A. If wiring and connectors are okay, go to next step.
5. Using scan tool, actuate LDP solenoid. Wiggle wiring harness from LDP solenoid to PCM while monitoring LDP switch status. If status switches from UP to DOWN at any time while wiggling wiring harness, repair wiring harness as necessary and perform TEST VER-5A. If status does not change, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-5A.
6. Turn ignition off. Disconnect LDP solenoid connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on LDP solenoid connector, fused ignition switch output circuit (Red/Orange wire). If voltage is 10 volts or less, repair open fused ignition switch circuit and perform TEST VER-5A. If voltage is more than 10 volts, go to next step.
7. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-5A. If connectors and terminals are okay, go to next step.
8. Using an external ohmmeter, check resistance of LDP solenoid control circuit (Dark Green/Red wire) from LDP connector to PCM Gray connector. If resistance is 5 ohms or more, repair open LDP solenoid control circuit and perform TEST VER-5A. If resistance is less than 5 ohms, go to next step.
9. Using scan tool in ohmmeter mode, check resistance of PCM Gray connector, LDP solenoid control circuit (Dark Green/Red wire). If resistance is less than 5 ohms, repair short to ground in LDP solenoid control circuit and perform TEST VER-5A. If resistance is 5 ohms or more, go to next step.
10. Reconnect LDP connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM Gray connector, LDP solenoid control circuit (Dark Green/Red wire). If voltage is 10 volts or less, replace LDP and perform TEST VER-5A. If voltage is more than 10 volts, replace PCM and perform TEST VER-5A.

TEST TC-184A - LEAK DETECTION PUMP SW OR MECHANICAL FAULT

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Start engine and allow it to idle. Using scan tool, read and note Leak Detection Pump (LDP) pressure switch status. Using scan tool, actuate LDP solenoid. If status does not switch from UP to DOWN, go to step 6). If status switches from UP to DOWN, go to next step.
2. Using scan tool, stop LDP solenoid actuation. Using scan tool, read LDP pressure switch status. If status does not switch from DOWN to UP, go to step 6). If status switches from DOWN to UP, go to next step.
3. Condition required to set DTC is not present at this time. LEAK DETECTION PUMP PRESSURE SW DTC sets if Powertrain Control Module (PCM) does not sense state of solenoid change when it is energized. Possible causes are: open or shorted LDP switch sense circuit, defective LDP switch, or open fused ignition switch circuit. Go to next step.
4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-5A. If wiring and connectors are okay, go to next step.
5. Using scan tool, actuate LDP solenoid. Wiggle wiring harness from LDP solenoid to PCM while monitoring LDP switch status. If status switches from UP to DOWN at any time while wiggling wiring harness, repair wiring harness as necessary and perform TEST VER-5A. If status does not change, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-5A.
6. Connect a vacuum gauge between LDP and LDP vacuum supply hose. Start engine and read vacuum gauge. If vacuum gauge does not read within one in. Hg of engine vacuum, repair leak or obstruction in vacuum supply hose and perform TEST VER-5A. If vacuum gauge reads within one in. Hg of engine vacuum, go to next step.
7. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-5A. If connectors and terminals are okay, go to next step.
8. Turn ign on. Using scan tool voltmeter mode, check voltage on PCM Gray connector, LDP pressure switch circuit (Violet/Red). If voltage is more than 10 volts, replace LDP and perform TEST VER-5A. If voltage is 10 volts or less, go to next step.
9. Disconnect LDP connector. Check voltage on LDP connector, fused ignition switch output circuit (Red/Orange wire). If voltage is 10 volts or less, repair open fused ignition switch circuit and perform TEST VER-5A. If voltage is more than 10 volts, go to next step.
10. Using an external ohmmeter, check resistance of LDP pressure switch circuit (Violet/Red wire) from LDP connector to PCM Gray connector. If resistance is 5 ohms or more, repair open LDP pressure switch circuit and perform TEST VER-5A. If resistance is less than 5 ohms, replace LDP and perform TEST VER-5A.

TEST TC-185A - AUXILIARY 5-VOLT SUPPLY OUTPUT TOO LOW

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read DTCs. If scan tool displays AUXILIARY 5-VOLT SUPPLY OUTPUT TOO LOW, go to step 5). If scan tool does not display AUXILIARY 5-VOLT SUPPLY OUTPUT TOO LOW, go to next step.
2. Condition required to set DTC is not present at this time. AUXILIARY 5-VOLT SUPPLY OUTPUT TOO LOW DTC sets if auxiliary 5-volt supply to sensors is less than 3.5 volts for 4 seconds, with ignition on. Possible causes are: shorted 5-volt supply circuit, shorted governor pressure sensor, or shorted Vehicle Speed Sensor (VSS). Go to next step.
3. Inspect all related wiring and connectors for damage. Repair wiring and connectors as necessary and perform TEST VER-5A. If wiring and connectors are okay, go to next step.
4. Wiggle wiring harness from powertrain control module to VSS and transmission solenoid pack. If scan tool displays AUXILIARY 5-VOLT SUPPLY OUTPUT TOO LOW, repair wiring harness as necessary and perform TEST VER-5A. If scan tool does not display AUXILIARY 5-VOLT SUPPLY CIRCUIT TOO LOW, see «INACTIVE DTC CONDITION»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l__inactive-dtc-condition) . Test is complete. Perform TEST VER-5A.
5. Turn ignition on, engine off. Disconnect Vehicle Speed Sensor (VSS) connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-5A. If connector and terminals are okay, go to next step.
6. Using scan tool in voltmeter mode, check voltage on VSS connector, 5-volt supply circuit (Orange wire). If voltage is less than 4.5 volts, repair short to ground in 5-volt supply circuit and perform TEST VER-5A. If voltage is 4.5 volts or more, go to next step.
7. Turn ignition off. Using scan tool in ohmmeter mode, check resistance of VSS connector, 5-volt supply circuit (Orange wire). If resistance is less than 5 ohms, repair short to ground in 5-volt supply circuit and perform TEST VER-5A. If resistance is 5 ohms or more, go to next step.
8. Reconnect VSS connector. Go to next step.
9. Disconnect transmission solenoid connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-5A. If connector and terminals are okay, go to next step.
10. Using scan tool in voltmeter mode, check voltage on transmission solenoid connector, 5-volt supply circuit (Orange wire). If voltage is 4.5 volts or more, replace governor pressure sensor and perform TEST VER-5A. If voltage is less than 4.5 volts, go to next step.
11. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-5A. If connectors and terminals are okay, go to next step.
12. Using scan tool in ohmmeter mode, check resistance of VSS connector, 5-volt supply circuit (Orange wire). If resistance is less than 5 ohms, repair short to ground in 5-volt supply circuit and perform TEST VER-5A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-5A.

TEST TC-186A - MISFIRE ADAPTIVE NUMERATOR AT LIMIT

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Disconnect Crankshaft Position (CKP) sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-5A. If connector and terminals are okay, go to next step.
2. Check installation of CKP sensor. Properly install CKP sensor and perform TEST VER-5A. If CKP sensor is properly installed, go to next step.
3. Remove crankshaft position sensor. Inspect flexplate slots for damage or excessive movement. Repair flexplate as necessary and perform TEST VER-5A. If flexplate is okay, replace CKP sensor and perform TEST VER-5A.

TEST TC-187A - EVAP LEAK MONITOR PINCHED HOSE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. DTC may be set by defective secondary seal on fuel filler neck, or a loose or missing fuel tank cap. Ensure fuel tank is at least 1/2 full. Using Evaporative (EVAP) System Testing Kit (6872A) and instructions printed on its cover, perform pressure pump self-test. Turn ignition off and go to next step.
2. Connect EVAP system pressure pump supply hose to Leak Detection Pump (LDP) test port. Set pressure hold to OPEN and set vent to CLOSED. Turn pump timer on and go to next step.
3. Connect a vacuum pump to testing kit vacuum tee and apply 18 in. Hg of vacuum to LDP. If LDP does not hold vacuum, repair LDP vacuum supply line for leak and perform TEST VER-5A. If LDP holds vacuum, go to next step.
4. Turn ignition on. Using scan tool, actuate LDP solenoid while monitoring testing kit vacuum gauge. If vacuum does not drop when solenoid is actuated, replace LDP and perform TEST VER-5A. If vacuum drops when solenoid is actuated, go to next step.
5. Using vacuum pump, raise vacuum to 18 in. Hg vacuum. When pressure gauge on testing kit reads more than 14 psi, remove fuel tank cap and open secondary seal. If pressure drops when fuel tank cap is removed, go to step 7). If pressure does not drop, go to next step.
6. Note pressure reading and disconnect fuel tank vent line at the EVAP canister. If pressure drops when the vent line is removed, repair obstruction in vent line between the fuel tank and the EVAP canister, and perform TEST VER-5A. If pressure does not drop, perform TEST TC-187B.
7. Reinstall fuel tank cap. Allow testing kit to pressurize to 14 psi. Disconnect pressure hose from LDP. If pressure drops when hose is disconnected, perform TEST TC-187C. If pressure does not drop, go to next step.
8. Disconnect LDP pressure hose from EVAP canister. If pressure drops when hose is disconnected, replace LDP pressure hose and perform TEST VER-5A. If pressure does not drop, replace EVAP canister and perform TEST VER-5A.

TEST TC-187B - EVAP LEAK MONITOR PINCHED HOSE

Note. Perform TEST TC-187A before proceeding.

Disconnect EVAP purge line from EVAP canister. If pressure drops when hose is disconnected, replace EVAP canister and perform TEST VER-5A. If pressure does not drop when hose is disconnected, repair obstruction in EVAP purge line to EVAP canister and perform TEST VER-5A.

TEST TC-187C - EVAP LEAK MONITOR PINCHED HOSE

Note. Perform TEST TC-187A before proceeding.

1. Reconnect Leak Detection Pump (LDP) pressure hose. Allow testing tool pressure pump to reach at least 14 psi. Using scan tool, stop all actuation tests while monitoring testing tool pressure gauge. If pressure does not drop when stopping actuation tests, replace LDP and filter, and perform TEST VER-5A. If pressure drops, go to next step.
2. Disconnect testing tool from LDP. Disconnect EVAP purge hose from EVAP solenoid. Start engine and allow it to idle. Wait 3 minutes or until EVAP purge solenoid starts to operate. If vacuum pulsates at canister side of solenoid, no problem is found at this time. Perform TEST VER-5A. If vacuum does not pulsate, go to next step.
3. Disconnect vacuum hose from throttle side of EVAP solenoid. If engine vacuum is present, replace EVAP solenoid and perform TEST VER-5A. If vacuum is not present, repair obstruction in vacuum hose or throttle, and perform TEST VER-5A.

TEST TC-188A - O/D SWITCH LOW RATIONALITY

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
2. Using scan tool in ohmmeter mode, check resistance of PCM Gray connector, Overdrive (O/D) off switch sense circuit (Orange/White wire). Press O/D off switch 2 or 3 times. If resistance changes while pressing button, replace PCM and perform TEST VER-2A. If resistance does not change, go to next step.
3. Disconnect O/D switch connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
4. Using scan tool in ohmmeter mode, check resistance of O/D switch connector, O/D switch sense circuit (Orange/White wire). If resistance is less than 5 ohms, repair short to ground in O/D switch sense circuit and perform TEST VER-2A. If resistance is 5 ohms or more, go to next step.
5. Using an external ohmmeter, check resistance of O/D switch sense circuit between PCM Gray connector and O/D switch connector. If resistance is 5 ohms or more, repair open O/D switch sense circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace O/D switch and perform TEST VER-2A.

TEST TC-189A - POST-CATALYST O2 SENSOR HEATER FAILURE

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Disconnect post-catalyst O2S connector. Using an external ohmmeter, check resistance between O2S connector (component side), ASD relay output circuit (White wire) and heater ground circuit (White wire). (Scheme 84) If resistance is not 4-6 ohms, replace post-catalyst O2S and perform TEST VER-2A. If resistance is 4-6 ohms, go to next step.
2. Using an external ohmmeter, check resistance between engine ground and O2S connector, heater ground circuit (Black/Light Blue wire). If resistance is 5 ohms or more, repair open heater ground circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
3. Start engine. Check voltage on O2S connector, ASD relay output circuit (Dark Green/Orange wire). If voltage is less than 12 volts, repair open ASD relay output circuit and perform TEST VER-2A. If voltage is 12 volts or more, go to next step.
4. Using an external ohmmeter, check resistance of O2S signal circuit (Orange/Brown wire) between O2S connector and PCM Black connector. If resistance is 5 ohms or more, repair open signal circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
5. Check resistance of O2S ground circuit (Black/Light Blue wire) between O2S connector and PCM Black connector. If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-2A. If resistance is less than 5 ohms, replace O2S and perform TEST VER-2A.

No Trouble Code Complete Test

Check Technical Service Bulletins (TSBs) for any pertinent information. If a TSB exists, perform corrective action. If TSB does not exist or if driveability problem still exists, perform TEST NTC-2A through NTC-16A, and TEST NTC-22A in sequence until driveability problem is found. See NO TROUBLE CODE TEST MENU.

NO TROUBLE CODE TEST MENU

No Trouble Code Quick Individual Test

If any item listed in NO TROUBLE CODE TEST MENU is suspected as cause of vehicle's driveability problem, perform associated test(s) individually. Return to NO TROUBLE CODE TEST MENU if driveability problem still exists.

No Trouble Code Quick Symptom Test

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

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

NO TROUBLE CODE QUICK SYMPTOM TEST MENU

TEST NTC-2A - CHECKING SECONDARY IGNITION & TIMING

Note. Refer to manufacturer's operation manual for instructions in use of engine analyzer and procedure for pattern analysis.

1. Turn engine off. Connect engine analyzer to engine. Start engine, and let it idle. If engine will not idle, maintain constant engine speed at more than idle. Set scope to read display or parade pattern. If secondary ignition pattern is not okay, repair indicated component in secondary ignition system and perform TEST VER-2A. If secondary ignition pattern is okay, go to next step.
2. Remove any spark plug wire. Observe secondary kilovolt line. If open circuit secondary voltage is not at least 25,000 volts, replace ignition coil and perform TEST VER-2A. If open circuit secondary voltage is at least 25,000 volts, go to next step.
3. Reinstall spark plug wire. Ensure engine temperature is more than 180°F (82.2°C) before proceeding. Go to next step.
4. Using scan tool, read total timing advance. Increase engine speed to 2000 RPM. If timing advance does not change with increase in RPM, replace PCM and perform TEST VER-2A. If timing advance changes with increase in RPM, secondary ignition system and timing advance are normal. Test passed.

TEST NTC-3A - CHECKING FUEL PRESSURE

1. Turn ignition off. Release fuel pressure. Connect fuel pressure gauge to fuel rail. Turn ignition on. Go to next step.
2. Using scan tool, actuate fuel system test. If fuel pressure is 45-55 psi (3.2-3.9 kg/cm 2 ), fuel pressure is normal. Test passed. If fuel pressure is not as specified, go to next step.
3. Record fuel pressure reading. If fuel pressure is more than 55 psi (3.9 kg/cm 2 ), go to step 5). If fuel pressure is less than 55 psi (3.2 kg/cm 2 ), go to next step.
4. Using scan tool, stop actuation test. Turn ignition off. Inspect fuel lines for kinks or restrictions. Release fuel pressure and repair fuel lines as necessary, and perform TEST VER-2A. If no kinked or restricted lines exist, go to next step.
5. Start engine and note fuel pressure gauge reading. If fuel pressure is 44.2-54.2 psi (3.1-3.8 kg/cm 2 ) fuel pressure is normal. Test passed. If fuel pressure is not as specified, go to next step.
6. If fuel pressure is more than 54.2 psi (3.8 kg/cm 2 ), fuel pump is okay, but internal fuel regulator is defective. Replace fuel pump module and perform TEST VER-2A. If fuel pressure is more than zero, but less than 44.2 psi (3.1 kg/cm 2 ), replace fuel pump module and perform TEST VER-2A. If fuel pressure is zero, perform TEST TC-101A.

TEST NTC-4A - CHECKING ECT SENSOR CALIBRATION

1. Turn ignition on. Using scan tool, read Engine Coolant Temperature (ECT) sensor value. If ECT sensor value is more than 180°F (82.2°C), allow engine to cool to 150°F (65.6°C) and go to next step.
2. Start engine. Allow engine to reach 180°F (82.2°C) or more while monitoring scan tool. If scan tool reading does not increase smoothly as engine temperature increases, inspect cooling system for mechanical failures. Repair cooling system as necessary and perform TEST VER-2A. If cooling system is okay, replace ECT sensor and perform TEST VER-2A. If scan tool reading increases smoothly, go to next step.
3. If ECT sensor value did not reach 180°F (82.2°C) or more, inspect cooling system for mechanical failures. Repair cooling system as necessary and perform TEST VER-2A. If cooling system is okay, replace ECT sensor and perform TEST VER-2A. If ECT sensor value reached 180°F (82.2°C), ECT sensor is operating properly. Test is complete.

TEST NTC-5A - CHECKING THROTTLE POSITION SENSOR CALIBRATION

1. Turn ignition on. Using scan tool, read Throttle Position (TP) sensor voltage. Ensure throttle is fully closed and against throttle stop. If voltage is more than 1.5 volts with throttle closed, replace TP sensor and perform TEST VER-2A. If voltage is 1.5 volts or less with throttle closed, go to next step.
2. Observe scan tool while slowly opening throttle to wide open position. If voltage change is not smooth, replace TP sensor and perform TEST VER-2A. If voltage change is smooth, go to next step.
3. If maximum voltage is not at least 3.4 volts at Wide Open Throttle (WOT), replace TP sensor and perform TEST VER-2A. If voltage is at least 3.4 volts at WOT, TP sensor is operating normally. Test is complete.

TEST NTC-6A - CHECKING MAP SENSOR CALIBRATION

1. Turn engine off. Install vacuum "T" in MAP sensor vacuum hose. Install vacuum gauge. Start engine, and let it idle. If engine will not idle, maintain a constant RPM above idle. Go to next step.
2. Using scan tool, read MAP sensor vacuum. If reading is not within one in. Hg of vacuum gauge reading, replace MAP sensor and perform TEST VER-2A. If reading is within one in. Hg of vacuum gauge reading, MAP sensor is operating properly. Test is complete.

TEST NTC-7A - CHECKING OXYGEN SENSOR SWITCHING

1. Allow engine to reach normal operating temperature. Using scan tool, read pre-catalyst/upstream and post-catalyst/downstream O2S states. Raise engine speed to more than 1500 RPM. If both O2S states are switching between rich and lean, system is functioning properly. Test is complete. If either or both O2S is locked on lean, perform TEST NTC-7B. If neither O2S is locked on lean, go to next step.
2. Turn engine off. Release fuel pressure. Connect fuel pressure gauge to fuel rail. Turn ignition on. Using scan tool, actuate fuel system test. Allow fuel pressure gauge to stabilize to normal fuel pressure. Stop fuel system actuation test. Go to next step.
3. Monitor fuel pressure gauge for one minute. If fuel pressure gauge reading drops more than 10 psi (0.7 kg/cm 2 ), replace leaking injector(s) as necessary and perform TEST VER-2A. If fuel pressure gauge reading does not drop more than 10 psi (0.7 kg/cm 2 ), go to next step.
4. Inspect air cleaner and inlet ducts for restrictions. Repair air cleaner/inlet ducts as necessary and perform TEST VER-2A. If no restrictions exist, perform TEST NTC-8A.

TEST NTC-7B - CHECKING OXYGEN SENSOR SWITCHING

Note. Perform TEST NTC-7A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Allow engine to idle. Inspect engine for vacuum leaks. Repair vacuum leaks as necessary and perform TEST VER-2A. If no vacuum leaks exist, go to next step.
2. Using scan tool, read O2S signal voltage. If voltage is 0.1 volt or more, go to step 6). If voltage is less than 0.1 volt, go to next step.
3. Turn ignition off. Disconnect O2S connector. inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
4. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of O2S connector, O2S signal circuit (Black/Dark Green wire). If resistance is less than 5 ohms, repair short to ground in O2S signal circuit and perform TEST VER-2A. If resistance is more than 5 ohms, replace O2S and perform TEST VER-2A.
6. Turn engine off. If O2S has been replaced, go to next step. If O2S has not been replaced, replace O2S and go to next step.
7. Turn ignition on. Using scan tool, reset adaptive fuel memory. Start engine, and allow it to reach normal operating temperature. Using scan tool, read O2S state. If O2S state is switching, repair is complete. Perform TEST VER-2A. If O2S state is not switching, perform TEST NTC-8A.

TEST NTC-7D - CHECKING OXYGEN SENSOR SWITCHING

Note. Perform TEST NTC-7A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Allow engine to idle. Inspect engine for vacuum leaks. Repair vacuum leaks as necessary and perform TEST VER-2A. If no vacuum leaks exist, go to next step.
2. Using scan tool, read both O2S signal voltages. If neither voltage is less than 0.1 volt, go to step 6). If either or both voltage(s) is less than 0.1 volt, go to next step.
3. Turn ignition off. Disconnect faulty O2S connector. inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
4. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
5. Using scan tool in ohmmeter mode, check resistance of O2S connector, O2S signal circuit (Black/Orange wire or Tan/White wire). If resistance is less than 5 ohms, repair short to ground in O2S signal circuit and perform TEST VER-2A. If resistance is more than 5 ohms, replace O2S and perform TEST VER-2A.
6. Turn engine off. If O2S has been replaced, go to next step. If O2S has not been replaced, replace O2S and go to next step.
7. Turn ignition on. Using scan tool, reset adaptive fuel memory. Start engine, and allow it to reach normal operating temperature. Using scan tool, read O2S state. If O2S state is switching, repair is complete. Perform TEST VER-2A. If O2S state is not switching, perform TEST NTC-8A.

TEST NTC-8A - CHECKING OXYGEN SENSOR HEATER

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Disconnect suspected O2S connector. Using an external ohmmeter, check resistance between O2S (component side), ASD relay output circuit (White wire) and heater ground circuit (White wire). (Scheme 84) If resistance is not 4-6 ohms, replace O2S and perform TEST VER-2A. If resistance is 4-6 ohms, go to next step.
2. Using an external in ohmmeter, check resistance of O2S connector, ground circuit (Black/Light Blue wire) to ground. If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
3. Start engine. Using scan tool in voltmeter mode, check voltage on O2S connector, ASD relay output circuit (Dark Green/Orange wire). If voltage is less than 12 volts, repair open ASD relay output circuit and perform TEST VER-2A. If voltage is 12 volts or more, go to next step.
4. Turn engine off. Using an external ohmmeter, check resistance of O2S signal circuit between O2S connector and PCM Black connector. For appropriate wire color, see O2S SIGNAL CIRCUIT IDENTIFICATION table. If resistance is 5 ohms or more, repair open signal circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step. O2S SIGNAL CIRCUIT IDENTIFICATION Application Wire Color Downstream Tan/White Upstream Black/Light Green
5. Check resistance of O2S ground circuit (Black/Light Blue wire) between O2S connector and PCM Black connector. If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-2A. If resistance is less than 5 ohms, O2S is operating properly. Test passed.

TEST NTC-9A - CHECKING IDLE AIR CONTROL MOTOR

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, set engine speed to 1100 RPM. If engine speed sets at 1050-1150 RPM, return engine to normal idle. Idle speed motor is operating properly. Test passed. If engine speed does not set as specified, return engine to normal idle and go to next step.
2. Disconnect Idle Air Control (IAC) motor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
3. Using scan tool in voltmeter mode, check voltage on IAC motor connector, driver No. 1 circuit (Violet/Black wire) while momentarily opening and closing throttle. If voltage stays less than one volt, perform TEST NTC-9B. If voltage does not stay less than one volt, go to next step.
4. Check voltage on IAC motor connector, driver No. 2 circuit (Brown/White wire) while momentarily opening and closing throttle. If voltage stays less than one volt, perform TEST NTC-9B. If voltage does not stay less than one volt, go to next step.
5. Check voltage on IAC motor connector, driver No. 3 circuit (Yellow/Black wire) while momentarily opening and closing throttle. If voltage stays less than one volt, perform TEST NTC-9B. If voltage does not stay less than one volt, go to next step.
6. Check voltage on IAC motor connector, driver No. 4 circuit (Gray/Red wire) while momentarily opening and closing throttle. If voltage stays less than one volt, perform TEST NTC-9B. If voltage does not stay less than one volt, go to next step.
7. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step. NOTE: Steps 8)-11) check for short circuits between IAC motor driver circuits.
8. Using an external ohmmeter, check resistance between IAC motor connector, driver No. 1 circuit (Violet/Black wire) and each remaining circuit on IAC motor connector. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together and perform TEST VER-2A. If resistance is 5 ohms or more on all IAC motor driver circuits, go to next step.
9. Check resistance between IAC motor connector, driver No. 2 circuit (Brown/White wire) and each remaining circuit on IAC motor connector. If resistance less than 5 ohms between any 2 circuits, repair driver circuits shorted together and perform TEST VER-2A. If resistance is 5 ohms or more on all IAC motor driver circuits, go to next step.
10. Check resistance between IAC motor connector, driver No. 3 circuit (Yellow/Black wire) and each remaining circuit on IAC motor connector. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together and perform TEST VER-2A. If resistance is 5 ohms or more on all IAC motor driver circuits, go to next step.
11. Check resistance between IAC motor connector, driver No. 4 circuit (Gray/Red wire) and each remaining circuit on IAC motor connector. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together and perform TEST VER-2A. If resistance is 5 ohms or more replace IAC motor and perform TEST VER-2A.

TEST NTC-9B - CHECKING IDLE AIR CONTROL MOTOR

Note. Perform TEST NTC-9A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of IAC motor connector, driver No. 1 circuit (Violet/Black wire) between IAC motor connector and PCM Black connector. If resistance is less than 5 ohms, perform TEST NTC-9C. If resistance is 5 ohms or more, repair open driver No. 1 circuit and go to next step.
3. Check resistance of IAC motor connector, driver No. 2 circuit (Brown/White wire) between IAC motor connector and PCM Black connector. If resistance is less than 5 ohms, perform TEST NTC-9C. If resistance is 5 ohms or more, repair open driver No. 2 circuit and go to next step.
4. Check resistance of IAC motor connector, driver No. 3 circuit (Yellow/Black wire) between IAC motor connector and PCM Black connector. If resistance is less than 5 ohms, perform TEST NTC-9C. If resistance is 5 ohms or more, repair open driver No. 3 circuit and go to next step.
5. Check resistance of IAC motor connector, driver No. 4 circuit (Gray/Red wire) between IAC motor connector and PCM Black connector. If resistance is less than 5 ohms, perform TEST NTC-9C. If resistance is 5 ohms or more, repair open No. 4 driver circuit and perform TEST VER-2A.

TEST NTC-9C - CHECKING IDLE AIR CONTROL MOTOR

Note. Perform TEST NTC-9B before proceeding. This test checks for short circuits between driver circuits.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using an external ohmmeter, check resistance between IAC motor connector, driver No. 1 circuit (Violet/Black wire) and each remaining circuit on IAC motor connector. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together and perform TEST VER-2A. If resistance is 5 ohms or more on all IAC motor driver circuits, go to next step.
2. Check resistance between IAC motor connector, driver No. 2 circuit (Brown/White wire) and each remaining circuit on IAC motor connector. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits shorted together and perform TEST VER-2A. If resistance is 5 ohms or more on all IAC motor driver circuits, go to next step.
3. Check resistance between IAC motor connector, driver No. 3 circuit (Yellow/Black wire) and each remaining circuit on IAC motor connector. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together and perform TEST VER-2A. If resistance is 5 ohms or more on all IAC motor driver circuits, go to next step.
4. Check resistance between IAC motor connector, driver No. 4 circuit (Gray/Red wire) and each remaining circuit on IAC motor connector. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together and perform TEST VER-2A. If resistance is 5 ohms or more replace IAC motor and perform TEST VER-2A.

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

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, read Park/Neutral (P/N) position switch state. Move gear selector in and out of Park and Reverse while observing scan tool display. If display corresponds with gear selector position, system is functioning correctly. Test passed. If display does not correspond with gear selector position, go to next step.
2. Turn ignition off. Place gear selector in Park. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
3. Using scan tool in ohmmeter mode, check resistance of PCM Black connector, P/N position switch sense circuit (Brown/Orange wire). Observe scan tool display while moving gear selector in and out of Park and Reverse. If resistance switches from less than 5 ohms to more than 5 ohms, replace PCM and perform TEST VER-2A. If resistance does not switch from less than 5 ohms to more than 5 ohms, go to next step.
4. Check if resistance always stays less than 5 ohms. if resistance always stays less than 5 ohms, repair short to ground in P/N position switch sense circuit and perform TEST VER-2A. if resistance does not always stay less than 5 ohms, go to next step.
5. Disconnect P/N position switch connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Using an external ohmmeter, check resistance of P/N position switch sense circuit (Brown/Orange wire), between PCM Black connector and P/N position switch connector. If resistance is less than 10 ohms, replace P/N position switch and perform TEST VER-2A. If resistance is 10 ohms or more, repair open P/N position switch sense circuit and perform TEST VER-2A.

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

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) Black connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Using scan tool in ohmmeter mode, check resistance of PCM Black connector terminal No. 31, ground circuit (Black/Tan wire). If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
3. Using scan tool in ohmmeter mode, check resistance of PCM Black connector terminal No. 32, ground circuit (Black/Tan wire). If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
4. Using scan tool in voltmeter mode, check voltage on of PCM Black connector, fused B+ circuit (Red/White wire). If voltage is 10 volts or less, repair open B+ circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step.
5. Turn ignition on. Check voltage on PCM Black connector, ignition switch output circuit (Light Green/Black wire). If voltage is 10 volts or less, repair open ignition switch output circuit and perform TEST VER-2A. If voltage is more than 10 volts, turn ignition off. Reconnect PCM connector. PCM ground and power circuits are operating properly. Test passed.

TEST NTC-12A - CHECKING EVAP SYSTEM

Note. For component location, see the THEORY/OPERATION - 5.9L article.

1. Start engine. When engine reaches operating temp, inspect throttle-to-EVAP canister vacuum hoses for leaks or restrictions. Repair or replace hoses as necessary and perform TEST VER-2A. If hoses are okay, go to next step.
2. Disconnect EVAP solenoid-to-EVAP canister hose. Using scan tool, actuate EVAP solenoid. If EVAP solenoid is not allowing vacuum to cycle through, replace EVAP solenoid and perform TEST VER-2A. If EVAP solenoid is allowing vacuum to cycle through, go to next step.
3. Stop EVAP solenoid actuation. Disconnect EVAP solenoid connector. If EVAP solenoid is allowing vacuum to cycle through, replace EVAP solenoid and perform TEST VER-2A. If EVAP solenoid is not allowing vacuum to cycle through, go to next step. CAUTION: DO NOT use more than 5 psi in following steps.
4. Turn ignition off. Attempt to blow air through EVAP solenoid-to-canister hose. If air flows, EVAP solenoid and hoses are okay. Test passed. If air does not flow, go to next step.
5. Disconnect EVAP solenoid-to-EVAP canister hose at EVAP canister. Attempt to blow air through EVAP solenoid-to-EVAP canister hose. If air flows, replace EVAP canister and perform TEST VER-2A. If air does not flow, repair or replace hose as necessary and perform TEST VER-2A.

TEST NTC-13A - CHECKING EGR SYSTEM

Note. For component location, see the THEORY/OPERATION - 5.9L article.

1. Turn ign off. Inspect condition and routing of all EGR hoses. Repair or replace hoses as necessary and perform TEST VER-2A. If hoses are okay, go to next step.
2. Disconnect vacuum supply hose at EGR solenoid. Connect vacuum gauge to disconnected vacuum hose. Start engine. If vacuum is more than 10 in. Hg at idle, go to step 4). If vacuum is 10 in. Hg or less at idle, go to next step.
3. Disconnect EGR vacuum supply hose at intake manifold. Connect a vacuum gauge to intake manifold nipple. Read vacuum gauge at idle. If vacuum is more than 10 in. Hg at idle, repair restriction or leak in vacuum line to EGR solenoid and perform TEST VER-2A. If vacuum is 10 in. Hg or less at idle, repair plugged vacuum nipple at throttle and perform TEST VER-2A.
4. Disconnect vacuum gauge, and reconnect vacuum hose to EGR solenoid. Disconnect vacuum hose from EGR valve, and connect vacuum gauge to disconnected hose. Go to next step.
5. While observing vacuum gauge, momentarily snap throttle open. If vacuum is not more than 5 in. Hg at any time, replace EGR valve assembly and perform TEST VER-2A. If vacuum is more than 5 in. Hg at any time, go to next step.
6. Turn ignition off. Disconnect hose to EGR valve exhaust backpressure tube. Adjust a shop air hose to 20 psi. Connect shop air to nipple on base of backpressure transducer. Listen for a tone change while opening and closing throttle. If tone changes, replace EGR valve assembly and perform TEST VER-2A. If tone does not change, go to next step.
7. Remove vacuum gauge. Cap open nipple on base of backpressure transducer. Connect hand vacuum pump to EGR valve. Start engine and go to next step.
8. While slowly applying vacuum to EGR valve, listen for engine RPM change. If engine RPM does not change, replace EGR valve assembly and perform TEST VER-2A. If engine RPM changes, go to next step.
9. Turn ignition off. Apply 10 in. Hg and hold for 30 seconds. If vacuum does not hold for 30 seconds, replace EGR valve assembly and perform TEST VER-2A. If vacuum holds for 30 seconds, EGR system is normal. Test passed.

TEST NTC-14A - CHECKING ENGINE VACUUM

Note. Normal vacuum reading will vary depending on altitude.

Connect a vacuum gauge to engine vacuum source. Start engine, and let it idle. Observe vacuum gauge at idle. If vacuum gauge reading is not steady 13-22 in. Hg, perform TEST NTC-22A. If vacuum gauge reading is steady and within specification, engine vacuum is normal. Test passed.

TEST NTC-15A - CHECKING INTAKE AIR TEMPERATURE SENSOR

Note. Ensure engine is off and ignition is on. Perform following steps within 5 minutes of each other.

1. Using scan tool, read and record Intake Air Temperature (IAT) sensor reading. Turn ignition off. Remove MAP sensor. Go to next step.
2. Using temperature probe, measure temperature inside MAP sensor opening. If temperature probe reading is not within 10°F of scan tool reading, replace IAT sensor and perform TEST VER-2A. If temperature probe reading is within 10°F of scan tool reading, reinstall MAP sensor. IAT system is operating properly. Test passed.

TEST NTC-16A - CHECKING MINIMUM IDLE AIRFLOW

1. Remove air cleaner. Disconnect vacuum hose from PCV valve. Install Vacuum Fitting (6714) in disconnected hose. Disconnect 3/16" EVAP hose from throttle side of. Cap 3/16" nipple. Go to next step.
2. Start engine. Allow engine to reach normal operating temperature. Using scan tool, actuate minimum idle airflow and wait for system to stabilize. If engine speed is 500-900 RPM, stop actuation test. Minimum idle airflow is normal. Test passed. If engine speed is not as specified, go to next step. WARNING: Clean throttle in well ventilated area and wear rubber gloves.
3. Stop actuation test. Turn engine off. Remove throttle. While holding throttle open, spray entire throttle bore with carburetor/throttle cleaner. Using soft scuff pad, clean throttle bore and throttle plate. Using compressed air, dry throttle. Install throttle and go to next step.
4. Start engine. Using scan tool, actuate minimum idle airflow. If engine speed is 500-900 RPM, stop actuation test. Minimum idle airflow is normal. Test passed. Perform TEST VER-2A. If engine speed is not as specified, replace throttle and perform TEST VER-2A.

TEST NTC-17A - CHECKING INTAKE AIR HEATER #1

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool in voltmeter mode, check voltage on positive battery terminal. Using scan tool, actuate intake air heater No. 1. If voltage drops at least 0.5 volt when heater actuates, system is operating properly. Test passed. If voltage does not drop at least 0.5 volt, go to next step.
2. Listen for "clicking" noise from intake air heater relay No. 1. when heater actuates. If relay clicking, perform TEST NTC-17B. If relay is not clicking, go to next step.
3. Disconnect fused ignition switch output circuit (Light Green/Black wire) at intake air heater relay No. 1. (Scheme 87) Using scan tool in voltmeter mode, check voltage on fused ignition switch output circuit. If voltage is 10 volts or less, repair open fused ignition switch output circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step.
4. Reconnect fused ignition switch output circuit. Disconnect intake air heater No. 1 control circuit (Yellow/Black wire) from intake air heater relay No. 1. Connect one end of a jumper wire to driver terminal (where Yellow/Black wire was connected) and briefly tap other end of jumper wire to engine ground. If intake air heater relay No. 1 does not click, replace relay and perform TEST VER-2A. If intake air relay No. 1 clicks, go to next step.
5. Turn ignition off. Disconnect Powertrain Control Module (PCM) Black connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Using an external ohmmeter, check resistance of intake air heater relay No. 1 control circuit (Yellow/Black wire) between relay connector and PCM Black connector. If resistance is 5 ohms or more, repair open intake air heater relay No. 1 control circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
7. Using scan tool in ohmmeter mode, check resistance of PCM Black connector, intake air heater relay No. 1 control circuit (Yellow/Black wire). If resistance is less than 5 ohms, repair short to ground in intake air heater relay No. 1 control circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.

Testing Intake Air Heater Relays. Scheme 87

TEST NTC-17B - CHECKING INTAKE AIR HEATER #1

Note. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool in voltmeter mode, check voltage on positive battery cable (Black 6-gauge wire) at intake air heater relay No. 1. (Scheme 87) If voltage is 10 volts or less, repair open cable and perform TEST VER-2A. If voltage is more than 10 volts, go to next step. CAUTION: Intake air heaters draw a large amount of current. Ensure actuation time is brief.
2. Using scan tool in voltmeter mode, check voltage on positive battery cable (Black 6-gauge wire) at intake air heater relay No. 1. (Scheme 87) Using scan tool, actuate intake air heater relay No. 1. If voltage is 9 volts or less, repair open positive battery cable and perform TEST VER-2A. If voltage is more than 10 volts, replace intake air heater and perform TEST VER-2A.

TEST NTC-18A - CHECKING INTAKE AIR HEATER #2

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool in voltmeter mode, check voltage on positive battery terminal. Using scan tool, actuate intake air heater No. 2. If voltage drops at least 0.5 volt when heater actuates, system is operating properly. Test passed. If voltage does not drop at least 0.5 volt, go to next step.
2. Listen for "clicking" noise from intake air heater relay No. 2. when heater actuates. If relay clicking, perform TEST NTC-18B. If relay is not clicking, go to next step.
3. Disconnect fused ignition switch output circuit (Light Green/Black wire) at intake air heater relay No. 2. (Scheme 87) Using scan tool in voltmeter mode, check voltage on fused ignition switch output circuit. If voltage is 10 volts or less, repair open fused ignition switch output circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step.
4. Reconnect fused ignition switch output circuit. Disconnect intake air heater No. 2 control circuit (Orange/Black wire) from intake air heater relay No. 2. Connect one end of a jumper wire to driver terminal (where Orange/Black wire was connected) and briefly tap other end of jumper wire to engine ground. If intake air relay No. 2 does not click, replace relay and perform TEST VER-2A. If intake air relay No. 2 clicks, go to next step.
5. Turn ignition off. Disconnect Powertrain Control Module (PCM) Black connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Using external ohmmeter, check resistance of intake air heater relay 2 control circuit (Orange/Black) between relay connector and PCM Black connector. If resistance 5 ohms or more, repair open intake air relay 2 control circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
7. Using scan tool in ohmmeter mode, check resistance of PCM Black connector, intake air heater relay No. 2 control circuit (Orange/Black wire). If resistance is less than 5 ohms, repair short to ground in intake air heater relay No. 2 control circuit and perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM and perform TEST VER-2A.

TEST NTC-18B - CHECKING INTAKE AIR HEATER #2

Note. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool in voltmeter mode, check voltage on positive battery cable (Black 6-gauge wire) at intake air heater relay No. 2. (Scheme 87) If voltage is 10 volts or less, repair open cable and perform TEST VER-2A. If voltage is more than 10 volts, go to next step. CAUTION: Intake air heaters draw a large amount of current. Ensure actuation time is brief.
2. Using scan tool in voltmeter mode, check voltage on positive battery cable (Black 6-gauge wire) at heater relay No. 2. (Scheme 87) Using scan tool, actuate intake air heater relay No. 2. If voltage is 9 volts or less, repair open positive battery cable and perform TEST VER-2A. If voltage is more than 10 volts, replace intake air heater and perform TEST VER-2A.

TEST NTC-19A - CHECKING FUEL HEATER

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Note. Test applies only if vehicle symptoms are: runs rich, hard to start, does not rev-up, or misses under load. If vehicle experiences these symptoms only when ambient temperature is 40°F (4.4°C) or more, this test does not apply.

1. Disconnect fuel heater connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Turn ignition on. Using scan tool in voltmeter mode, check voltage on fuel heater connector, fuel heater relay output circuit (Red/Black wire). If voltage is 10 volts or less, repair open fuel heater relay output circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step.
3. Turn ignition off. Using scan tool in ohmmeter mode, check resistance of fuel heater connector, ground circuit (Black/Tan wire). If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
4. Ensure fuel heater element temperature is less than 40°F (4.4°C). Using an external ohmmeter, check resistance across fuel heater connector terminals (component side). If resistance is not 2.4-3.1 ohms, replace fuel heater element and perform TEST VER-2A. If resistance is 2.4-3.1 ohms, fuel heater is operating normally. Test passed.

TEST NTC-20A - CHECKING WAIT-TO-START LAMP

Note. This test only applies to problems with WAIT-TO-START lamp.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. While observing WAIT-TO-START lamp, turn ignition on. If WAIT-TO-START lamp does not come on, go to step 3). If lamp comes on then turns off, system is operating normally. Test passed. If lamp comes on and stays on, turn ignition off and go to next step.
2. Disconnect PCM White connector. While observing WAIT-TO-START lamp, turn ignition on. If WAIT-TO-START lamp comes on, repair short to ground in WAIT-TO-START lamp driver circuit (Orange/Black wire) and perform TEST VER-2A. If WAIT-TO-START lamp does not come on, replace PCM and perform TEST VER-2A.
3. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
4. Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM White connector, WAIT-TO-START lamp driver circuit (Orange/Black wire). If voltage is more than 10 volts, replace PCM and perform TEST VER-2A. If voltage is 10 volts or less, go to next step.
5. Disconnect WAIT-TO-START lamp connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
6. Inspect WAIT-TO-START lamp bulb. If bulb is burned-out, replace bulb and perform TEST VER-2A. If bulb is okay, reinstall bulb and go to next step.
7. Backprobe message center connector, fused ignition switch output circuit (Light Green/Yellow wire). If voltage is 10 volts or less, repair open fused ignition switch output circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step.
8. Connect a jumper wire between message center connector, WAIT-TO-START lamp driver circuit (Orange/Black wire) and engine ground. If WAIT-TO-START lamp comes on, repair open WAIT-TO-START lamp driver circuit and perform TEST VER-2A. If WAIT-TO-START lamp does not come on, replace message center printed circuit assembly and perform TEST VER-2A.

TEST NTC-21A - CHECKING WATER-IN-FUEL LAMP & SENSOR

Note. This test only applies to problems with WATER-IN-FUEL lamp.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Disconnect Water-In-Fuel (WIF) sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
2. Connect jumper wire between WIF sensor connector, sensor signal circuit (Dark Green/Red), and engine ground. Turn ignition off, then on to recycle lamp. If WIF lamp comes on, perform TEST NTC-21B. If WIF lamp does not come on, turn ignition off and go to next step.
3. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A. If connectors and terminals are okay, go to next step.
4. Using an external ohmmeter, check resistance of WIF sensor signal circuit (Dark Green/Red wire) between WIF sensor connector and PCM Black connector. If resistance is 5 ohms or more, repair open WIF sensor signal circuit and perform TEST VER-2A. If resistance is less than 5 ohms, turn ignition on and go to next step.
5. Using scan tool in voltmeter mode, check voltage on PCM Gray connector, WIF lamp driver circuit (Tan/Orange wire). If voltage is more than 10 volts, replace PCM and perform TEST VER-2A. If voltage is 10 volts or less, go to next step.
6. Disconnect WIF lamp connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A. If connector and terminals are okay, go to next step.
7. Inspect WIF lamp bulb. If bulb is burned-out, replace bulb and perform TEST VER-2A. If bulb is okay, reinstall bulb and go to next step.
8. Using scan tool in voltmeter mode, backprobe message center connector, fused ignition switch output circuit (Light Green/Yellow wire). If voltage is 10 volts or less, repair open fused ignition switch output circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step.
9. Connect a jumper wire between PCM Gray connector, WIF lamp driver circuit (Tan/Orange) and engine ground. If WIF lamp does not come on, repair open WIF lamp driver circuit and perform TEST VER-2A. If WIF lamp comes on, replace message center printed circuit assembly and perform TEST VER-2A.

TEST NTC-21B - CHECKING WATER-IN-FUEL LAMP & SENSOR

Note. This test only applies to problems with Water-In-Fuel (WIF) lamp. Perform TEST NTC-21A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Turn ignition off. Disconnect jumper wire. Using scan tool in ohmmeter mode, check resistance of WIF sensor connector, ground circuit (Black/Light Blue wire). If resistance is more than 5 ohms, repair open ground circuit and perform TEST VER-2A. If resistance is 5 ohms or less, replace WIF sensor and perform TEST VER-2A.

TEST NTC-22A - CHECKING ENGINE MECHANICAL SYSTEMS

Note. If coming to this test from an oxygen sensor test, and rich or lean condition is not corrected after checking items listed below, replace Powertrain Control Module (PCM) and perform TEST VER-2A.

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 distributor position. See CHECKING DISTRIBUTOR POSITION WITH SCAN TOOL.
3. Ensure engine vacuum is at least 13 in. Hg in Neutral.
4. Check valve timing.
5. Check engine compression.
6. Check camshaft lobes for abnormal wear.
7. Check for exhaust system restrictions.
8. Check PCV system for proper function.
9. Check camshaft and crankshaft sprockets.
10. Check torque converter stall speed.
11. Check power brake booster for internal vacuum leak.
12. Check for fuel contamination.
13. Ensure injector control wire is connected to correct fuel injector and injector is not plugged or restricted.

Note. Setting distributor position does not adjust ignition timing. Ignition timing is controlled by PCM.

Checking Distributor Position With Scan Tool

1. Connect scan tool to data link connector. Select SET SYNC from scan tool menu. Start engine and go to next step.
2. Observe scan tool display. If scan tool does not display IN RANGE, loosen distributor hold-down clamp bolt and rotate distributor until reading is as close to zero degrees as possible, and IN RANGE message is displayed. Tighten hold-down clamp bolt to 16.7 ft. lbs. (22.5 N.m).

TEST NS-SEL - NO START SELECTION MENU

1. Attempt to crank engine. If engine will not crank, perform TEST NS-9A. If engine cranks, but does not start and scan tool displays NO RESPONSE, perform TEST NS-6A. If engine starts and scan tool displays NO RESPONSE, perform TEST NS-6B. If engine starts and scan tool does not display NO RESPONSE, go to next step.
2. Turn ignition off. Turn ignition on, but do not crank engine. Using scan tool, read DTCs. If any DTCs are displayed, go to DTC TEST and perform appropriate test(s). If no DTCs are displayed, refer to TEST NS-1A.

TEST NS-1A - QUALIFYING NO START CONDITION

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect spark plug cable at spark plug No. 1. Connect cable terminal to a spark plug tester. Connect spark plug tester to engine ground. Go to next step. CAUTION: When checking for spark, consider 1-2 sparks as a no-spark condition.
2. While cranking engine for 10 seconds, observe for spark. If a good spark occurs, perform TEST NS-2A. If a good spark does not occur, reconnect spark plug cable and go to next step.
3. Turn ignition off. Disconnect ignition secondary cable from distributor. Connect cable terminal to a spark plug tester. Connect spark plug tester to engine ground. Go to next step.
4. While cranking engine for 10 seconds, observe for spark. If a good spark occurs, replace distributor cap, rotor or cables as necessary and perform TEST VER-1A. If a good spark does not occur, go to next step.
5. Turn ignition off. Disconnect other end of ignition secondary cable from ignition coil. Using an external ohmmeter, check resistance between both ends of ignition secondary cable. If resistance is more than 15,000 ohms, replace ignition secondary cable and perform TEST VER-1A. If resistance is 15,000 ohms or less, go to next step.
6. Remove distributor cap and observe distributor rotor while cranking engine. If rotor does not turn, repair distributor drive system as necessary and perform TEST VER-1A. If rotor turns, go to next step.
7. Reinstall distributor cap and ignition secondary cable. Disconnect ignition coil connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-1A. If connector and terminals are okay, go to next step.
8. Turn ignition on. Using scan tool in voltmeter mode, check voltage on ignition coil connector, ASD relay output circuit (Dark Green/Orange wire). Using scan tool, actuate generator field. If voltage is 10 volts or less, repair open ASD relay output circuit and perform TEST VER-1A. If voltage is more than 10 volts, go to next step.
9. Turn ignition off. Using an external ohmmeter, check resistance across ignition coil primary terminals. (Scheme 88) If resistance is not 0.95-1.20 ohms, replace ignition coil and perform TEST VER-1A. If resistance is as specified, go to next step.
10. Check resistance across ignition coil primary and secondary terminals. (Scheme 88) If resistance is not 11,300-15,300 ohms, replace ignition coil and perform TEST VER-1A. If resistance is as specified, go to next step.
11. Disconnect PCM Black connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-1A. If connector and terminals are okay, go to next step.
12. Using scan tool in ohmmeter mode, check resistance of PCM Black connector, ignition coil driver circuit (Gray wire). If resistance is less than 5 ohms, repair short to ground in ignition coil driver circuit and perform TEST VER-1A. If resistance is 5 ohms or more, go to next step.
13. Using an external ohmmeter, check resistance of ignition coil driver circuit (Gray wire) between PCM Black connector and ignition coil connector. If resistance is more than 5 ohms, repair open ignition coil driver circuit and perform TEST VER-1A. If resistance is 5 ohms or less, go to next step.
14. Check valve timing. Correct valve timing as necessary and perform TEST VER-1A. If valve timing is okay, replace PCM and perform TEST VER-1A.

Identifying Ignition Coil Terminals (Typical). Scheme 88

TEST NS-2A - CHECKING FUEL SYSTEM

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Ensure throttle cables are not holding throttle open. Repair throttle as necessary and perform TEST VER-1A. If throttle is okay, go to next step.
2. Using scan tool, actuate fuel system. Using a stethoscope, listen for fuel pump operation at fuel tank. If fuel pump operation cannot be heard, perform TEST NS-5A. If fuel pump operation can be heard, turn ignition off and go to next step. WARNING: Fuel system may be under pressure. Release pressure before connecting fuel pressure gauge. See «FUEL PRESSURE RELEASE»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l) .
3. Turn ignition off. Release fuel pressure. Ensure fuel tank is at least 1/4 full. Connect a fuel pressure gauge to fuel rail. Go to next step.
4. Turn ignition on. Using scan tool, actuate fuel system. Read fuel pressure gauge. If fuel pressure is more than 44 psi (3.1 kg/cm 2 ), replace fuel filter/regulator and primary fuel filter, and perform TEST VER-1A. If fuel pressure is less than 34 psi (2.3 kg/cm 2 ), perform TEST NS-4A. If fuel pressure is 34-44 psi (2.3-3.1 kg/cm 2 ) and vehicle initially started and stalled repeatedly, perform TEST NS-7A. If vehicle did not initially start and stall repeatedly, perform TEST NS-3A.

TEST NS-3A - CHECKING ENGINE MECHANICAL SYSTEM

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Disconnect Manifold Absolute Pressure (MAP) sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-1A. If connector and terminals are okay, go to next step.
2. Turn ignition on. Using scan tool in voltmeter mode, check voltage on MAP sensor connector, 5-volt supply circuit (Violet/White wire). If voltage is 4.5 volts or less, repair open 5-volt supply circuit and perform TEST VER-1A. If voltage is more than 4.5 volts, go to next step.
3. Reconnect MAP sensor connector. Remove all spark plugs. Inspect spark plug tips for wet fuel. If spark plug tips are wet, clean spark plugs and perform TEST VER-1A. If spark plug tips are not wet, reinstall spark plugs and go to next step.
4. Inspect spark plug cables for correct placement. Reposition cables as necessary and perform TEST VER-1A. If spark plug cables are installed correctly, go to next step.
5. Turn ignition off. Check valve timing. Correct valve timing as necessary and perform TEST VER-1A. If valve timing is okay, replace MAP sensor and perform TEST VER-1A.

TEST NS-4A - REPAIRING LOW FUEL PRESSURE

Inspect fuel lines from fuel filter/regulator to fuel rail for restrictions. Repair restricted fuel lines as necessary and perform TEST VER-1A. If no restrictions exist, Release fuel pressure. Replace fuel pump module and perform TEST VER-1A.

TEST NS-5A - CHECKING FUEL PUMP

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Using scan tool, stop fuel system actuation and actuate fuel pump relay. Feel fuel pump relay. If fuel pump relay does not pulsate, perform TEST TC-101A. If fuel pump relay pulsates, go to next step.
2. Turn ignition off. Remove fuel pump relay. Inspect fuel pump relay connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-1A. If connector and terminals are okay, go to next step.
3. Using scan tool in voltmeter mode, check voltage on fuel pump relay connector, fused B+ circuit (Red/White wire). If voltage is 10 volts or less, repair open fused B+ circuit and perform TEST VER-1A. If voltage is more than 10 volts, go to next step.
4. Substitute a known-good fuel pump relay. Attempt to start engine. If engine starts, replace original fuel pump relay and perform TEST VER-1A. If engine does not start, reinstall original fuel pump relay and go to next step. NOTE: Ensure fuel pump connector has clean and tight connections.
5. Disconnect fuel pump connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-1A. If connector and terminals are okay, go to next step.
6. Turn ignition on. Using scan tool, actuate fuel system. Using scan tool in voltmeter mode, check voltage on fuel pump connector, fuel pump relay output circuit (Dark Green/Black wire). If voltage is 10 volts or less, repair open fuel pump relay output circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step. WARNING: Fuel system may be under pressure. Release fuel pressure before opening system for testing or component replacement. See «FUEL PRESSURE RELEASE»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l) .
7. Using scan tool, stop fuel system actuation. Using scan tool in ohmmeter mode, check resistance of fuel pump connector, fuel pump ground circuit (Black wire). If resistance is 5 ohms or more, repair open fuel pump ground circuit and perform TEST VER-1A. If resistance is less than 5 ohms, release fuel pressure. Replace fuel pump and perform TEST VER-1A.

TEST NS-6A - REPAIRING NO RESPONSE CONDITION

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) Black connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-1A. If connector and terminals are okay, go to next step.
2. Turn ignition off. Using scan tool in ohmmeter mode, check resistance of both PCM Black connector, ground circuits (Black/Tan wires). If resistance is 5 ohms or more on either ground circuit, repair open ground circuits and perform TEST VER-1A. If resistance is less than 5 ohms on both ground circuits, go to next step.
3. Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM Black connector, fused ignition switch output circuit (Light Green/Black wire). If voltage is 10 volts or less, repair open fused ignition switch output circuit and perform TEST VER-1A. If voltage is more than 10 volts, go to next step.
4. Check voltage on PCM Black connector, fused B+ circuit (Red/White wire). If voltage is more than 10 volts, replace PCM and perform TEST VER-1A. If voltage is 10 volts or less, go to next step.
5. Remove and inspect B+ fuse/fuse link from Power Distribution Center (PDC). If fuse/fuse link is open, do not replace fuse/fuse link and go to step 7). If fuse/fuse link is okay, go to next step.
6. Check voltage on B+ fuse/fuse link connector, battery supply circuit (Red wire), between battery and PDC. If voltage is 10 volts or less, repair open battery supply circuit and perform TEST VER-1A. If voltage is more than 10 volts, repair open fused B+ circuit (Red/White wire) between PDC and PCM, and perform TEST VER-1A.
7. Turn ignition off. Remove Auto Shutdown (ASD) relay. Remove fuel system relay and go to next step.
8. Using scan tool in ohmmeter mode, check resistance of PCM Black connector, fused B+ circuit (Red/White wire). If resistance is less than 5 ohms, repair short to ground in fused B+ circuit, replace fuse/fuse link and perform TEST VER-1A. If resistance is 5 ohms or more, go to next step.
9. Check resistance of ASD relay connector, ASD relay output circuit (Dark Green/Orange wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, perform TEST NS-6C.
10. Disconnect each Oxygen Sensor (O2S) connector. Using scan tool in ohmmeter mode, check resistance of ASD relay connector, ASD relay output circuit (Dark Green/Orange wire). If resistance is more than 5 ohms, go to next step. If resistance is 5 ohms or less, go to step 12).
11. Check resistance of each O2S connector (component side) terminal No. 1, ASD relay output circuit (White wire). (Scheme 84) Replace O2S that has continuity to ground and perform TEST VER-1A. NOTE: Oxygen sensors must remain disconnected for remainder of test.
12. Disconnect ignition coil connector. Check resistance of ASD relay connector, ASD relay output circuit (Dark Green/Orange wire). If resistance is more than 5 ohms, replace ignition coil and fuse/fuse link, and perform TEST VER-1A. If resistance is 5 ohms or less, go to next step.
13. Disconnect generator field connector. Using scan tool in ohmmeter mode, check resistance of ASD relay connector, ASD relay output circuit (Dark Green/Orange wire). If resistance is more than 5 ohms, repair short to ground in generator and perform TEST VER-1A. If resistance is 5 ohms or less, go to next step.
14. While monitoring scan tool display, disconnect and reconnect each fuel injector connector in sequence. If resistance is more than 5 ohms when any fuel injector is disconnected, replace fuel injector that caused change in resistance, replace fuse/fuse link, and perform TEST VER-1A. If resistance is not more than 5 ohms when any fuel injector is disconnected, repair short to ground in ASD relay output circuit (Dark Green/Orange wire), replace fuse/fuse link, and perform TEST VER-1A.

TEST NS-6B - REPAIRING NO RESPONSE CONDITION

Note. Perform TEST NS-SEL before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. If ignition is not on when NO RESPONSE message is displayed, turn ignition on to get a response. Test is complete. If ignition is on when NO RESPONSE message is displayed, turn ignition off. Go to next step.
2. Disconnect Powertrain Control Module (PCM) connectors. Disconnect scan tool from Data Link Connector (DLC). Inspect PCM and DLC connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-1A. If connectors and terminals are okay, go to next step.
3. Using an external ohmmeter, check resistance between DLC connector, SCI transmit circuit (Pink wire) and engine ground. If resistance is less than 5 ohms, repair short to ground in SCI transmit circuit and perform TEST VER-1A. If resistance is 5 ohms or more, go to next step.
4. Check resistance between DLC connector, SCI receive circuit (Light Green/White wire) and engine ground. If resistance is less than 5 ohms, repair short to ground in SCI receive circuit and perform TEST VER-1A. If resistance is 5 ohms or more, go to next step.
5. Check resistance of SCI transmit circuit (Pink wire) between DLC and PCM Gray connector. If resistance is 5 ohms or more, repair open SCI transmit circuit and perform TEST VER-1A. If resistance is less than 5 ohms, go to next step.
6. Check resistance of SCI receive circuit (Light Green/White wire) between DLC and PCM Gray connector. If resistance 5 ohms or more, repair open SCI receive circuit and perform TEST VER-1A. If resistance is less than 5 ohms, go to next step.
7. Connect scan tool to functional DLC on another vehicle. Turn ignition on. Using scan tool, attempt to read DTCs. If scan tool does not display NO RESPONSE, replace initial vehicle's PCM and perform TEST VER-1A. If scan tool displays NO RESPONSE, go to next step.
8. Substitute another scan tool adapter cable. Using scan tool, attempt to read DTCs. If scan tool does not display NO RESPONSE, replace original scan tool adapter cable. If scan tool displays NO RESPONSE, repair or replace scan tool.

TEST NS-6C - REPAIRING NO RESPONSE CONDITION

Note. Perform TEST NS-6A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Disconnect fuel pump connector. Using scan tool in ohmmeter mode, check resistance of fuel pump relay connector, fuel pump relay output circuit (Dark Green/Black wire). If resistance is less than 5 ohms, repair short to ground in fuel pump relay output circuit. Replace fuse and perform TEST VER-1A. If resistance is 5 ohms or more, replace fuel pump and fuse, and perform TEST VER-1A.

TEST NS-7A - CHECKING IDLE AIR CONTROL MOTOR

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Holding throttle 1/4 way down, attempt to start engine. If engine does not start and stay running, and then stall when throttle is released, perform TEST NS-8A. If engine starts and stays running, and then stalls when throttle is released, go to next step.
2. Disconnect Idle Air Control (IAC) motor connector. Using scan tool, actuate IAC motor. Using scan tool in voltmeter mode, check voltage on IAC motor connector, No. 3 driver circuit (Yellow/Black wire). If voltage stays less than one volt, perform TEST NS-7B. If voltage stays one volt or more, go to next step.
3. Check voltage on IAC motor connector, No. 1 driver circuit (Violet/Black wire). If voltage stays less than one volt, perform TEST NS-7C. If voltage stays one volt or more, go to next step.
4. Check voltage on IAC motor connector, No. 4 driver circuit (Gray/Red wire). If voltage stays less than one volt, perform TEST NS-7D. If voltage stays one volt or more, go to next step.
5. Check voltage on IAC motor connector, No. 2 driver circuit (Brown/White wire). If voltage stays less than one volt, perform TEST NS-7E. If voltage stays one volt or more, go to next step.
6. Turn ignition off. Remove IAC motor from throttle. Reconnect IAC motor connector. Using scan tool, actuate IAC motor. If IAC motor tip does not move in and out, go to step 8). If IAC motor tip moves in and out, go to next step.
7. Inspect throttle for restriction or carbon build-up. Repair throttle as necessary and perform TEST VER-1A. If throttle is okay, perform TEST NS-8A.
8. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-1A. If connectors and terminals are okay, go to next step.
9. Using an external ohmmeter, check resistance between IAC motor connector, driver No. 1 circuit (Violet/Black wire) and each remaining circuit on IAC motor connector. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together and perform TEST VER-1A. If resistance is 5 ohms or more on all IAC motor driver circuits, go to next step.
10. Check resistance between IAC motor connector, driver 2 circuit (Brown/White) and each remaining circuit on IAC motor connector. If resistance less than 5 ohms between any 2 circuits, repair driver circuits shorted together and perform TEST VER-1A. If resistance is 5 ohms or more on all IAC motor driver circuits, go to next step.
11. Check resistance between IAC motor connector, driver No. 3 circuit (Yellow/Black wire) and each remaining circuit on IAC motor connector. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together and perform TEST VER-1A. If resistance is 5 ohms or more on all IAC motor driver circuits, go to next step.
12. Check resistance between IAC motor connector, driver No. 4 circuit (Gray/Red wire) and each remaining circuit on IAC motor connector. If resistance is less than 5 ohms between any 2 circuits, repair driver circuits that are shorted together and perform TEST VER-1A. If resistance is 5 ohms or more replace IAC motor and perform TEST VER-1A.

TEST NS-7B - IDLE AIR CONTROL MOTOR CIRCUITS

Note. Perform TEST NS-7A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-1A. If connectors and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of IAC motor connector, driver No. 3 circuit (Yellow/Black wire) between IAC motor connector and PCM Black connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-1A. If resistance is 5 ohms or more, repair open driver No. 3 circuit and perform TEST VER-1A.

TEST NS-7C - IDLE AIR CONTROL MOTOR CIRCUITS

Note. Perform TEST NS-7A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-1A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of IAC motor connector, driver No. 1 circuit (Violet/Black wire) between IAC motor connector and PCM Black connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-1A. If resistance is 5 ohms or more, repair open driver No. 1 circuit and perform TEST VER-1A.

TEST NS-7D - IDLE AIR CONTROL MOTOR CIRCUITS

Note. Perform TEST NS-7A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-1A. If connector and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of IAC motor connector, driver No. 4 circuit (Gray/Red wire) between IAC motor connector and PCM Black connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-1A. If resistance is 5 ohms or more, repair open driver No. 4 circuit and perform TEST VER-1A.

TEST NS-7E - IDLE AIR CONTROL MOTOR CIRCUITS

Note. Perform TEST NS-7A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-1A. If connectors and terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of IAC motor connector, driver No. 2 circuit (Brown/White wire) between IAC motor connector and PCM Black connector. If resistance is less than 5 ohms, replace PCM and perform TEST VER-1A. If resistance is 5 ohms or more, repair open driver No. 2 circuit and perform TEST VER-1A.

TEST NS-8A - REPAIRING START & STALL CONDITION

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

1. Check if any Technical Service Bulletins (TSBs) apply to vehicle.
2. Check distributor position. See CHECKING DISTRIBUTOR POSITION WITH SCAN TOOL.
3. Check valve timing.
4. Check engine compression.
5. Check for exhaust system restriction.
6. Check PCV system for proper function.
7. Check camshaft and crankshaft sprockets.
8. Check for fuel contamination.
9. Check secondary ignition system.

Note. Setting distributor position does not adjust ignition timing. Ignition timing is controlled by powertrain control module.

1. Connect scan tool to data link connector. Select SET SYNC from scan tool menu. Start engine and go to next step.
2. Observe scan tool display. If scan tool does not display IN RANGE, loosen distributor hold-down clamp bolt and rotate distributor until reading is as close to zero degrees as possible, and IN RANGE message is displayed. Tighten hold-down clamp bolt to 16.7 ft. lbs. (22.5 N.m).

TEST NS-9A - REPAIRING NO CRANK CONDITION

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. Ensure transmission is in Park. Using scan tool, select INPUTS/OUTPUTS and read Park/Neutral position. If scan tool does not display P/N, P/N switch sense circuit is open. Perform TEST TC-114A. If scan tool displays P/N, go to next step.
2. Remove starter relay. Inspect starter relay connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-1A. If connector and terminals are okay, go to next step.
3. Using scan tool in voltmeter mode, check voltage on starter relay connector, fused B+ circuit (Red/Light Green wire). If voltage is 10 volts or less, repair open fused B+ circuit and perform TEST VER-1A. If voltage is more than 10 volts, go to next step.
4. While holding ignition key in Crank position, check voltage on starter relay connector, ignition switch output circuit (Yellow wire). If voltage is 10 volts or less, repair open ignition switch output circuit and perform TEST VER-1A. If voltage is more than 10 volts, go to next step. WARNING: Engine may crank in following step. Keep away from moving engine parts.
5. Ensure transmission is in Park and parking brake is set. Briefly connect a jumper wire between starter relay connector, fused B+ circuit (Red/Light Green wire) and ignition switch output circuit (Yellow wire), then perform TEST NS-9C.

TEST NS-9C - REPAIRING NO CRANK CONDITION

Note. Perform TEST NS-9A before proceeding.

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

1. If starter motor cranks, go to step 6). If starter motor does not crank, note if starter solenoid clicks when jumper wire is connected. Disconnect jumper wire and go to next step.
2. Disconnect starter relay output circuit (Brown wire) from starter solenoid. Inspect connector and terminal for damage. Repair connector and terminals as necessary and perform TEST VER-1A. If connector and terminals are okay, go to next step.
3. Using an external ohmmeter, check resistance of starter relay output circuit between starter relay connector and starter solenoid. If resistance is 5 ohms or more, repair open starter relay output circuit and perform TEST VER-1A. If resistance is less than 5 ohms, go to next step.
4. Reinstall starter relay. Check battery cables for high resistance. If either cable has a voltage drop of more than 0.2 volt, replace battery cable(s) and perform TEST VER-1A. If battery cables are okay, go to next step.
5. If starter solenoid did not click when jumper wire was connected in step 1), replace solenoid and perform TEST VER-1A. If starter solenoid clicked, repair mechanical condition preventing starter from cranking and perform TEST VER-1A.
6. If vehicle is equipped with manual transmission, replace starter relay and perform TEST VER-1A. If vehicle is equipped with automatic transmission, go to next step.
7. Using scan tool in ohmmeter mode, check resistance of starter relay connector, Park/Neutral (P/N) position switch sense circuit (Brown/Orange wire). If resistance is less than 5 ohms, replace starter relay and perform TEST VER-1A. If resistance is 5 ohms or more, repair open P/N position switch sense circuit and perform TEST VER-1A.

TEST NS-13A - CHECKING FUEL PRESSURE LOSS

Note. For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.9L article.

Note. A fuel injector circuit is shorted to ground, causing engine to flood.

1. Using scan tool, read DTCs. If any fuel injector related DTCs are present, see «DTC MESSAGES & CODES»(/dodge/ram-wagon-b1500/1996-1997/remont/testing-diagnostics/#engine-controls-tests-wcodes-59l) table in DTC TEST and perform appropriate test(s). If no fuel injector DTCs are displayed, go to next step.
2. Turn ignition off. Disconnect Powertrain Control Module connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-1A. If connectors and terminals are okay, go to next step.
3. Disconnect all injector connectors. Using scan tool in ohmmeter mode, check resistance of each injector connector, control circuit (NOT Orange/Black wire) for short to ground. Repair injector control circuit(s) shorted to ground and perform TEST VER-1A. If no injector control circuits are shorted to ground, replace PCM and perform TEST VER-1A.

TEST VER-1A - NO START VERIFICATION

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

TEST VER-2A - ROAD TEST VERIFICATION

1. If this test is being performed subsequent to an OBD-II test, perform TEST VER-5A. If this test is being performed subsequent to a NO TROUBLE CODE (NTC) test, go to next step. If this test is being performed subsequent to a TROUBLE CODE (TC) test, go to step 3).
2. Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. Check if initial symptom still exists. If initial or another symptom exists, repair not complete. Check if any pertinent TSBs apply to vehicle and return to DTC TEST, if necessary.
3. If any DTCs have not been diagnosed, go to DTC TEST and finish diagnosing other DTCs. If all DTCs have been diagnosed, go to next step.
4. If Powertrain Control Module (PCM) has not been changed, connect scan tool to PCM data link connector. Erase DTCs. Using scan tool, reset all values in adaptive memory. Disconnect scan tool. Go to next step.
5. To ensure no other DTC remains, drive vehicle at least 5 minutes. While driving vehicle, attain a speed of 40 MPH. Stop vehicle. Turn engine off. Wait 10 seconds. Start engine and continue driving vehicle. Ensure transmission shifts through all gears. After road test, turn engine off. Go to next step.
6. Connect scan tool to DLC and read DTCs. If repaired DTC has reset, repair is not complete. Check all pertinent Technical Service Bulletins (TSBs), and return to DTC TEST if necessary. If another DTC exists, return to DTC TEST and follow path specified by other DTC. If no other DTCs exist, repair is now complete.

TEST VER-3A - CHARGING VERIFICATION

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

TEST VER-4A - SPEED CONTROL VERIFICATION

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

TEST VER-5A - ROAD TEST FOR OBD-II DTCS

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

See also:
• COMPUTER RELEARN PROCEDURES
• BASIC TESTING - 5.9L
• TESTS W/O CODES - 5.9L
• WIRING DIAGRAMS - 5.9L
• THEORY/OPERATION - 5.9L
• RETRIEVING DTCS
• FUEL PRESSURE RELEASE
• SELF-DIAGNOSTIC TESTS
• CLEARING DTCS
• TC-16A
• TC-10A
• TC-185A
• TC-153A
• TC-112A
• TC-6A
• TC-5A
• TC-128A
• TC-107A
• TC-31A
• TC-30A
• TC-17A
• TC-46A
• TC-161A
• TC-187A
• TC-160A
• TC-113A
• TC-18A
• TC-150A
• TC-149A
• TC-151A
• TC-101A
• TC-119A
• TC-118A
• TC-11A
• TC-142A
• TC-141A
• TC-169A
• TC-168A
• TC-167A
• TC-171A
• TC-25A
• TC-21A
• TC-58A
• TC-57A
• TC-157A
• TC-184A
• TC-183A
• TC-166A
• TC-37A
• TC-36A
• TC-186A
• TC-106A
• TC-44A
• TC-1A
• TC-39A
• TC-40A
• TC-35A
• TC-188A
• TC-114A
• TC-49A
• TC-48A
• TC-147A
• TC-189A
• TC-105A
• TC-126A
• TC-156A
• TC-121A
• TC-120A
• TC-181A
• TC-66A
• TC-124A
• TC-122A
• TC-15A
• TC-87A
• TC-138A
• TC-27A
• TC-26A
• TC-148A
• TC-12A
• TC-132A
• TC-173A
• TC-50A
• TC-75A
• TC-74A
• TC-164A
• TC-103A
• TC-155A
• TC-102A
• TC-62A
• TC-165A
• INACTIVE DTC CONDITION