Engine Controls - Tests W/codes - 3.0l Plymouth Voyager II

MODEL IDENTIFICATION

VEHICLE BODY IDENTIFICATION

INTRODUCTION

If no faults were found while performing F - GAS BASIC TESTING article, proceed with self-diagnostics. If no fault codes or only pass codes are present after entering self-diagnostics, proceed to TEST NF-1A and H - GAS TESTS W/O CODES article in the ENGINE PERFORMANCE Section for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.).

* PLEASE READ THIS FIRST *

SYSTEM DIAGNOSTICS

Note. Malfunction Indicator Light (MIL) may also be referred to as CHECK ENGINE Light.

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

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

Test circuits and repair or replace components as required. If problem is repaired or ceases to exist, PCM cancels fault after 50 ignition on/off cycles.

A specific fault results from a particular system failure. A fault does not condemn a specific component; component is not necessarily reason for failure. Faults only suggest probable malfunction area.

Hard Failures

Hard failures cause MIL to glow and remain on until malfunction is repaired. If light comes on and remains on (light may flash) during vehicle operation, determine cause of malfunction using self-diagnostic tests. If a sensor fails, PCM will use a substitute value in its calculations, allowing engine to operate in limp-in mode. In this condition, vehicle will run, but driveability may be poor.

Intermittent Failures

Intermittent failures may cause MIL to flicker or stay on until intermittent fault goes away. However, PCM memory will retain corresponding fault. If related fault does not reoccur within a certain time frame, related fault will be erased from PCM memory. Intermittent failures can be caused by a faulty sensor, bad connector or wiring related problems.

SERVICE PRECAUTIONS

During diagnosis, following these precautions

1. Always relieve fuel pressure before disconnecting any fuel injection-related component. DO NOT allow fuel to contact engine or electrical components. See «FUEL PRESSURE RELEASE»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__fuel-pressure-release) .
2. When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in the GENERAL INFORMATION Section before disconnecting battery.
3. Vehicle must have a fully charged battery and functional charging system.
4. Probe PCM 60-pin connector from pin side. DO NOT backprobe PCM connector.
5. DO NOT cause short circuits when performing electrical tests. This will set additional faults, making diagnosis of original problem more difficult.
6. DO NOT use a test light instead of a voltmeter.
7. When checking for spark, ensure coil wire is no more than 1/4" from ground. If coil wire is more than 1/4" from ground, damage to vehicle electronics and/or PCM may result.
8. DO NOT prolong testing of fuel injectors, or engine may hydrostatically (liquid) lock.
9. Always repair lowest fault code number (CHECK ENGINE light) or first fault displayed (DRB-II) first.
10. Always perform verification procedure test after repairs are made.
11. Always disconnect DRB-II after use.
12. Always disconnect DRB-II before charging battery.

VISUAL INSPECTION

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

DIAGNOSTIC PROCEDURE

Note. DO NOT skip any steps in self-diagnostic tests, or incorrect diagnosis may result.

Always perform a visual inspection before attempting to diagnose engine control system problems. See VISUAL INSPECTION . Enter on-board diagnostics, and retrieve fault codes. See ENTERING ON-BOARD DIAGNOSTICS . If fault codes are not present and/or using Diagnostic Readout Box II (DRB-II), proceed to one of following tests. See SELF-DIAGNOSTICS DIRECTORY table.

1. Go to appropriate «TEST NS-1A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-1a-qualifying-no-start-condition) if a no-start condition exists or engine stalls after start-up. Perform indicated VERIFICATION TEST after repairs have been made.
2. Go to appropriate «TEST FC-1A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-fc-1a-checking-system-for) if engine runs but has performance problems. Perform indicated VERIFICATION TEST after repairs have been made.
3. Go to appropriate «TEST NF-1A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l) if a driveability problem exits but no fault codes are present. Perform indicated VERIFICATION TEST after repairs have been made.

ENTERING ON-BOARD DIAGNOSTICS

Note. Although other scan testers are available, manufacturer recommends using Diagnostic Readout Box II (DRB-II). MIL function can be used but has limited diagnostic capability.

DRB-II Diagnostic Mode

1. Ensure ignition is off. Attach DRB-II to engine diagnostic connector. Engine diagnostic connector is located in engine compartment, near PCM on all models except Dakota. On Dakota, diagnostic connector is located in right rear corner of engine compartment, taped to harness.
2. Start engine (if possible). Turn A/C on, then off (if equipped). Turn engine off. Without starting engine, turn ignition on and access READ FAULTS function of DRB-II FUEL/IGN MENU. Record all fault messages displayed by DRB-II.

MIL Diagnostic Mode

1. Start engine (if possible). Move transmission shift lever through all positions, ending in Park. Turn A/C on, then off (if equipped).
2. Turn engine off. Without starting engine again, turn ignition on, off, on, off and on within 5 seconds. Record 2-digit fault codes as displayed by flashing MIL.
3. For example, fault code 23 is displayed as flash, flash, 4-second pause, flash, flash, flash. After a slightly longer pause, other codes stored are displayed in numerical order. When MIL begins to flash fault codes, it cannot be stopped. Start over if count is lost. Code 55 indicates end of fault code display.
4. Refer to FAULT CODES/MESSAGES to translate trouble code number to a DRB-II fault message. Once trouble area is identified, refer to TEST FC-1A. Use DRB-II fault messages to find appropriate test.
5. As an example, a 2.5L engine starts and runs but has a driveability problem. MIL indicates a Code 14. Refer to FAULT CODES/MESSAGES to translate trouble code number to a DRB-II fault message. When DRB-II fault message is obtained, refer to appropriate test. To clear fault codes, see CLEARING FAULTS.

CLEARING FAULTS

Note. Fault codes can also be cleared in READ FAULTS mode of DRB-II. To ensure all faults are read, use READ FAULTS mode to erase fault codes. See DRB-II DIAGNOSTIC MODE under ENTERING ON-BOARD DIAGNOSTICS .

1. If DRB-II is not available, go to step 3). If DRB-II is available, enter FUEL/IGN MENU. At FUEL/IGN MENU, press "5" (ADJUSTMENTS) key. Press ENTER key. At ADJUSTMENTS menu, press "1" (ERASE FAULTS) key. Press ENTER key.
2. DRB-II will display ERASE FAULTS ARE YOU SURE? (ENTER TO ERASE). Press ENTER key. When DRB-II is finished erasing fault codes, screen will display FAULTS ERASED.
3. If DRB-II is not available, fault codes may be cleared by disconnecting negative battery cable for at least 15 seconds.

INACTIVE FAULT CONDITION

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

1. Visually inspect related wiring harness connectors for broken, bent, pushed-out or corroded terminals.
2. Visually inspect related wiring harnesses for chafed, pierced or partially broken wires.
3. Check all pertinent TECHNICAL SERVICE BULLETINS (TSBs).

SUMMARY

If no hard fault codes (or only pass codes) are present, driveability symptoms exist or intermittent codes exist, proceed to appropriate TESTS W/O CODES article in the ENGINE PERFORMANCE Section for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.

Note. Although other scan testers are available, manufacturer recommends using Diagnostic Readout Box II (DRB-II) to diagnose system.

Ensure DRB-II is connected to engine diagnostic connector located in engine compartment. Ensure correct cartridge for vehicle and system being diagnosed is installed in DRB-II. Menu selections will vary depending on vehicle and system being diagnosed. Follow DRB-II screen prompts to actuate, adjust, monitor, reset, test and diagnose system as necessary.

DRB-II is grounded through engine diagnostic connector. Only one volt-ohmmeter test lead is required when using volt-ohmmeter option. DRB-II volt-ohmmeter should only be used when self-diagnostic tests require use of this option.

If DRB-II has a blank screen or displays RAM TEST FAILURE, CARTRIDGE ERROR, KEY PAD TEST FAILURE, LOW BATTERY or HIGH BATTERY, DRB-II failure is indicated. To diagnose and correct these conditions, see G - BODY TESTS W/CODES article in the ENGINE PERFORMANCE Section.

SERVICE REMINDER INDICATOR (SRI) MEMORY CHECK & MILEAGE

TRANSFER

Note. Perform SRI memory check only if referred here by diagnostic tests. Perform mileage transfer procedure only if PCM is being replaced.

When PCM is replaced, copy vehicle mileage from odometer to replacement PCM memory. Transfer of vehicle mileage will enable new PCM to operate SRI light properly.

1) Ensure ignition is off. Attach DRB-II to engine diagnostic connector. Engine diagnostic connector is located in engine compartment, near PCM on all models except Dakota. On Dakota, diagnostic connector is located in right rear corner of engine compartment, taped to harness. Turn ignition switch to RUN position.

2) Copyright information and diagnostic program version will appear on screen for a few seconds. After a few seconds DRB-II menu will appear. At FUEL/IGN MENU, press "5" (ADJUSTMENTS) key. Press ENTER key. At ADJUSTMENTS menu, press "4" (SRI MEMORY CHK) key. Press ENTER key. DRB-II display will read SRI MEMORY CHECK ARE YOU SURE? (ENTER TO CONTINUE).

3) Press ENTER key. DRB-II will display SRI MEMORY TEST WRITE TEST [-------] and, after a few seconds, IS INSTRUMENT PANEL MILEAGE BETWEEN XXXXX AND XXXXX? (PRESS YES OR NO). If vehicle mileage is within specification, SRI memory check is complete. Press YES key. If vehicle mileage is not within specification, go to next step.

4) Press NO key. DRB-II will display ENTER MILEAGE SHOWN ON INSTRUMENT PANEL (USE ENTER TO END) XXXXXXX. Enter vehicle mileage. DO NOT enter tenths. When correct vehicle mileage is entered, press ENTER key.

5) DRB-II will ask for verification of mileage entry. If mileage entry was accurate, press ENTER key. DRB-II will display SRI MEMORY CHECK COMPLETE. Vehicle must travel at least 8 miles for reset to occur.

SERVICE REMINDER INDICATOR (SRI) LIGHT RESET PROCEDURE

Note: Service Reminder Indicator (SRI) light is designed to be a reminder to service vehicle emissions control system. It is not an emissions warning system, only a reminder to perform necessary emissions servicing. Components to be serviced include PCV valve, oxygen sensor and some vacuum-operated components. SRI light will glow after a predetermined mileage.

1) To reset SRI light, ensure ignition is off. Connect DRB-II to engine diagnostic connector. Engine diagnostic connector is located in engine compartment, near PCM on all models except Dakota. On Dakota, diagnostic connector is located in right rear corner of engine compartment, taped to harness.

2) Turn ignition switch to RUN position. Copyright information and diagnostic program version will appear on screen for a few seconds. After a few seconds DRB-II menu will appear. At FUEL/IGN MENU, press "5" (ADJUSTMENTS) key. Press ENTER key.

3) At ADJUSTMENTS menu, press "3" (RESET SRI LIGHT) key. Press ENTER key. Display will read RESET SRI LIGHT ARE YOU SURE? (ENTER TO RESET). Press ENTER key.

FUEL PRESSURE RELEASE

Scheme 52

1. Fuel pressure must be fully released before opening fuel system or removing any fuel-carrying components. To release pressure in tank, open fuel tank cap slowly.
2. To release remaining pressure in system, disconnect injector wiring harness. Using jumper wire, connect injector harness ground terminal No. 1 to ground. (Scheme 52) Connect injector harness positive terminal No. 2 to positive battery terminal with second jumper wire.
3. DO NOT keep injector connector connected to positive battery terminal for longer than 5 seconds. Remove jumper wires. This releases system pressure. CAUTION: To minimize fuel spill, wrap a shop towel around and under pressure test port.
4. Using Fuel Pressure Gauge/Hose Tool (5069) with gauge removed, place gauge end of hose into approved gasoline container. To release pressure, screw other end of hose onto pressure test port. After pressure is released, remove hose from test port and continue fuel system service. When servicing is completed, install protective cap on fuel rail test port.

DTC & FAULT CODES/MESSAGES

Note. Not all fault codes apply to all vehicles. Some fault codes have more than one meaning. When a fault code has more than one meaning, MIL is unable to distinguish between different failures.

CODES/MESSAGES

Note. For DTC table, see TEST FC-1A - CHECKING SYSTEM FOR FAULT CODES under SELF-DIAGNOSTIC TESTS.

Code 11

DRB-II displays NO CRANK REFERENCE SIGNAL AT PCM. Condition is: no crankshaft reference signal picked up during cranking.

Code 13

DRB-II displays SLOW CHANGE IN IDLE MAP SENSOR SIGNAL. Condition is: Manifold Absolute Pressure (MAP) sensor output change slower and/or smaller than expected.

DRB-II displays NO CHANGE IN MAP FROM START TO RUN. Condition is: no difference recognized between Manifold Absolute Pressure (MAP) reading and barometric (atmospheric) pressure reading at start-up.

Code 14

DRB-II displays MAP VOLTAGE TOO LOW. Condition is: Manifold Absolute Pressure (MAP) sensor input less than minimum acceptable voltage.

DRB-II displays MAP VOLTAGE TOO HIGH. Condition is: Manifold Absolute Pressure (MAP) sensor input more than maximum acceptable voltage.

Code 15

DRB-II displays NO VEHICLE SPEED SENSOR SIGNAL. Condition is: no Vehicle Speed Sensor (VSS) signal detected with road load conditions.

Code 17

DRB-II displays ENGINE IS COLD TOO LONG. Condition is: coolant temperature stays less than normal operating temperature during vehicle operation.

Code 21

DRB-II displays O2S STAYS AT CENTER. Condition is: no rich or lean signal detected from oxygen sensor input.

DRB-II displays O2S SHORTED TO VOLTAGE. Condition is: oxygen sensor input voltage maintained at more than normal operating range.

Code 22

DRB-II displays ECT SENSOR VOLTAGE TOO LOW. Condition is: Engine Coolant Temperature (ECT) sensor input less than minimum acceptable voltage.

DRB-II displays ECT SENSOR VOLTAGE TOO HIGH. Condition is: Engine Coolant Temperature (ECT) sensor input more than maximum acceptable voltage.

Code 23

DRB-II displays INTAKE AIR TEMPERATURE SENSOR VOLTAGE LOW. Condition is: Intake Air Temperature (IAT) sensor input less than minimum acceptable voltage.

DRB-II displays INTAKE AIR TEMPERATURE SENSOR VOLTAGE HIGH. Condition is: Intake Air Temperature (IAT) sensor input more than maximum acceptable voltage.

DRB-II displays THROTTLE BODY TEMP VOLTAGE HIGH. Condition is: throttle body temperature input is more than maximum acceptable voltage.

DRB-II displays THROTTLE BODY TEMP VOLTAGE LOW. Condition is: throttle body temperature input is less than maximum acceptable voltage.

Code 24

DRB-II displays THROTTLE POSITION SENSOR VOLTAGE LOW. Condition is: Throttle Position Sensor (TPS) input less than minimum acceptable voltage.

DRB-II displays THROTTLE POSITION SENSOR VOLTAGE HIGH. Condition is: Throttle Position Sensor (TPS) input more than maximum acceptable voltage.

Code 25

DRB-II displays IDLE AIR CONTROL MOTOR CIRCUITS. Condition is: open or shorted condition detected in one or more Idle Air Control (IAC) motor circuits.

Code 27

DRB-II displays INJECTOR NO. 1-6 CONTROL CIRCUIT. Condition is: injector output driver does not respond properly to Powertrain Control Module (PCM) control signal.

Code 31

DRB-II displays EVAP PURGE SOLENOID CIRCUIT. Condition is: open or shorted condition detected in purge solenoid circuit.

Code 32

DRB-II displays EGR SOLENOID FAILURE. Condition is: open or shorted condition detected in EGR solenoid circuit.

DRB-II displays EGR SYSTEM FAILURE. Condition is: required change in air/fuel ratio not detected during diagnostic test. Fault is only present on models with California emissions packages.

Code 33

DRB-II displays A/C CLUTCH RELAY CIRCUIT. Condition is: open or shorted condition detected in A/C clutch relay circuit.

Code 34

DRB-II displays SPEED CONTROL SOLENOID CIRCUITS. Condition is: open or shorted condition detected in Speed Control (S/C) vacuum or vent solenoid circuits.

Code 35

DRB-II displays RADIATOR FAN RELAY CIRCUIT. Condition is: open or shorted condition detected in radiator fan relay circuit.

Code 37

DRB-II displays TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT. Condition is: open or shorted condition detected in torque converter clutch solenoid circuit.

Code 41

DRB-II displays GENERATOR FIELD NOT SWITCHING PROPERLY. Condition is: open or shorted condition detected in alternator field circuit.

Code 42

DRB-II displays AUTO SHUTDOWN RELAY CONTROL CIRCUIT. Condition is: open or shorted condition detected in Auto Shutdown (ASD) relay circuit.

DRB-II displays NO ASD RELAY VOLTAGE SENSE AT PCM. Condition is: Powertrain Control Module (PCM) did not receive message in Auto Shutdown (ASD) relay circuit.

Code 43

DRB-II displays IGNITION COIL NO. 1-3 PRIMARY CIRCUIT. Condition is: peak primary circuit current not achieved with maximum dwell time.

Code 44

DRB-II displays BATTERY TEMP SENSOR VOLTS OUT OF LIMIT. Condition is: battery temperature sensor volts out of limit.

Code 45

DRB-II displays OVERDRIVE SOLENOID. Condition is: open or shorted condition detected in overdrive solenoid circuit.

Code 46

DRB-II displays CHARGING SYSTEM VOLTAGE TOO HIGH. Condition is: battery voltage sense input more than target charging voltage during engine operation.

Code 47

DRB-II displays CHARGING SYSTEM VOLTAGE TOO LOW. Condition is: battery voltage sense input less than target charging voltage during engine operation.

Code 51

DRB-II displays O2S STAYS BELOW CENTER (LEAN). Condition is: oxygen sensor input indicates lean air/fuel ratio during engine operation.

Code 52

DRB-II displays ADDITIVE ADAPTIVE MEMORY AT LEAN LIMIT. Condition is: additive adaptive memory at lean limit.

DRB-II displays O2S STAYS ABOVE CENTER (RICH). Condition is: oxygen sensor input indicates rich air/fuel ratio during engine operation.

Code 53

DRB-II displays INTERNAL PCM FAILURE. Condition is: Powertrain Control Module (PCM) detects internal failure.

DRB-II displays PCM FAILURE SPI COMMUNICATION. Condition is: no Chrysler Collision Detection (CCD) bus communication.

Code 54

DRB-II displays CRANKSHAFT SIGNAL SYNC PICK-UP SIGNAL. Condition is: no fuel sync signal detected during crankshaft rotation.

DRB-II displays NO CAM SYNC SIGNAL AT PCM. Condition is: open or shorted condition detected in cam sync signal circuit.

Code 55

DRB-II display will be blank. Completion of fault code display by MIL light.

Code 62

DRB-II displays PCM FAILURE SRI MILE NOT STORED. Condition is: Powertrain Control Module (PCM) detects internal failure.

Code 63

DRB-II displays PCM FAILURE EEPROM WRITE DENIED. Condition is: unsuccessful attempt to write to an EEPROM location by PCM.

Code 76

DRB-II displays FUEL PUMP RESISTOR BYPASS RELAY CIRCUIT. Condition is: open or shorted condition detected in ballast resistor by-pass relay circuit.

CONNECTOR IDENTIFICATION

CONNECTOR IDENTIFICATION DIRECTORY

Scheme 53

A/C CLUTCH RELAY CONNECTOR TERMINAL IDENTIFICATION (EXCEPT DAKOTA)

Scheme 54

ASD RELAY CONNECTOR TERMINAL IDENTIFICATION

Scheme 55

CAMSHAFT POSITION SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 56

CRANKSHAFT POSITION SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 57

DISTRIBUTOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 58

EGR SOLENOID CONNECTOR TERMINAL IDENTIFICATION

Scheme 59

ENGINE COOLANT TEMPERATURE (ECT) SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 60

EVAPORATIVE PURGE SOLENOID CONNECTOR TERMINAL IDENTIFICATION

Scheme 61

FUEL PUMP CONNECTOR TERMINAL IDENTIFICATION

Scheme 62

FUEL PUMP RELAY CONNECTOR TERMINAL IDENTIFICATION

Scheme 63

IDLE AIR CONTROL (IAC) MOTOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 64

IGNITION COIL CONNECTOR TERMINAL IDENTIFICATION

Scheme 65

INJECTOR CONNECTOR TERMINAL IDENTIFICATION (INJECTOR SIDE)

INJECTOR CONNECTOR TERMINAL IDENTIFICATION (PCM SIDE)

Scheme 66

INTAKE AIR TEMPERATURE SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 67

MAP SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 68

OXYGEN SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 69

RADIATOR FAN RELAY CONNECTOR TERMINAL IDENTIFICATION

Scheme 70

TCC RELAY CONNECTOR TERMINAL IDENTIFICATION

Scheme 71

TCC SOLENOID CONNECTOR TERMINAL IDENTIFICATION

Scheme 72

TPS CONNECTOR TERMINAL IDENTIFICATION

Scheme 73

TRANSMISSION SOLENOID CONNECTOR TERMINAL IDENTIFICATION

Scheme 74

TEST FC-1A - CHECKING SYSTEM FOR FAULT CODES

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

Note. Battery must be fully charged before proceeding.

1. Try to start engine. If necessary, crank engine for up to 10 seconds. Connect DRB-II to data link connector. Record DRB-II fault messages. If DRB-II screen displays NO RESPONSE, go to «TEST NS-6A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-6a-correcting-no-response) .
2. If DRB-II has a blank screen or displays RAM TEST FAILURE, CARTRIDGE ERROR, KEY PAD TEST FAILURE, LOW BATTERY or HIGH BATTERY, this indicates a DRB-II failure. To diagnose and correct these conditions, see G - BODY TESTS W/CODES article in the ENGINE PERFORMANCE Section.
3. If fault messages are displayed, refer to fault code list. See «DTCS & DRB-II FAULT MESSAGES INDEX»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l) table. If DRB-II does not display any fault messages, refer to «TEST NF-1A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l) for no fault codes or «TEST NS-1A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-1a-qualifying-no-start-condition) for no-start problems.

DTCS & DRB-II FAULT MESSAGES INDEX

TEST FC-2A - NO CRANK REFERENCE SIGNAL AT PCM (DTC 11)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages. Attempt to start engine. If necessary, crank engine for at least 10 seconds. Read DRB-II fault messages. If DRB-II does not display NO CRANK REFERENCE SIGNAL AT PCM, go to next step. If DRB-II displays NO CRANK REFERENCE SIGNAL AT PCM, go to step 5).
2. At this time, condition required to set fault is not present. NO CRANK REFERENCE SIGNAL AT PCM fault sets if Powertrain Control Module (PCM) does not see crank signal with cam signal present. Possible causes are open 8-volt power supply at crankshaft position sensor, open or shorted crankshaft position sensor signal wire, open crankshaft position sensor ground, failed crankshaft position sensor, improperly adjusted crankshaft position sensor, failed PCM, and failed Transmission Control Module (TCM). Go to next step.
3. Inspect crankshaft position sensor wiring and connectors. Clean and repair wiring and connectors as required. Perform TEST VER-2. If wiring and connectors are okay, start engine. Wiggle wiring harness from crankshaft position sensor to PCM.
4. If engine misses or stalls when wiring harness is wiggled, repair wiring harness where wiggling caused problem. Perform TEST VER-2. If engine does not miss or stall when wiring harness is wiggled, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Test is complete. Perform TEST VER-2.
5. If DRB-II displayed NO CRANK REFERENCE SIGNAL AT PCM instep 1), turn ignition off. Disconnect and inspect distributor connector. Repair as required. Perform TEST VER-2. If distributor connector is okay, turn ignition on. Using DRB-II in voltmeter mode, check voltage of distributor connector (harness side) 8-volt power supply circuit (Orange wire).
6. If voltage is less than 7 volts, go to «TEST FC-2B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-fc-2b-no-crank-reference) . If voltage is more than 7 volts, disconnect coil wire from distributor cap. Place coil wire within 1/4" of a good ground.
7. Connect a jumper wire between distributor connector (harness side), crankshaft position sensor signal circuit (Gray/Black wire) and sensor ground circuit (Black/Light Blue wire).
8. Make and break connection at distributor connector sensor ground wire (Light Blue/Black wire) several times while watching coil wire for spark. If coil wire sparks, go to next step. If coil wire does not spark, go to step 10).
9. Remove distributor cap. Crank engine while watching rotor. If rotor turns, replace crankshaft position sensor. Perform TEST VER-2. If rotor does not turn, repair distributor drive system. Perform TEST VER-2.
10. If coil wire did not spark in step 8), turn ignition off. Using DRB-II in ohmmeter mode, check resistance of distributor connector, sensor ground circuit (Black/Light Blue wire). If resistance is more than 5 ohms, repair open in Black/Light Blue wire. Perform TEST VER-2.
11. If resistance is less than 5 ohms, disconnect PCM connector. Inspect PCM connector for damaged or pushed-out terminals. Repair as necessary. Perform TEST VER-2. If PCM connector terminals are okay, go to next step.
12. Using an external ohmmeter, check resistance of crankshaft position sensor signal circuit (Gray/Black wire) between distributor connector (harness side) and PCM connector terminal No. 24. If resistance is more than 5 ohms, repair open in Gray/Black wire. Perform TEST VER-2.
13. If resistance is less than 5 ohms, place DRB-II in ohmmeter mode. Using DRB-II, check resistance of distributor connector (harness side), crankshaft position sensor signal circuit (Gray/Black wire).
14. If resistance is more than 5 ohms, replace PCM. Perform TEST VER-2. If resistance is less than 5 ohms and vehicle is not equipped with an electronic automatic transmission, repair short to ground in Gray/Black wire. Perform TEST VER-2.
15. If resistance is less than 5 ohms and vehicle is equipped with electronic automatic transmission, disconnect TCM connector. Using DRB-II, check resistance of distributor connector (harness side), crankshaft position sensor signal circuit (Gray/Black wire).
16. If resistance is less than 5 ohms, repair short to ground in Gray/Black wire. Perform TEST VER-2. If it is more than 5 ohms, replace TCM. Perform TEST VER-2.

TEST FC-2B - NO CRANK REFERENCE SIGNAL AT PCM (DTC 11)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect PCM connector for damaged or pushed-out terminals. Repair as required. Perform TEST VER-2. If PCM connector terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of 8-volt supply circuit (Orange wire) between distributor connector (harness side) and PCM connector terminal No. 7. If resistance is more than 5 ohms, repair open in Orange wire. Perform TEST VER-2.
3. If resistance is less than 5 ohms, place DRB-II in ohmmeter mode. Using DRB-II, check resistance of PCM connector terminal No. 7, 8-volt power supply circuit (Orange wire). If resistance is more than 5 ohms, replace PCM. Perform TEST VER-2. If resistance is less than 5 ohms, repair short to ground in Orange wire. Perform TEST VER-2.

TEST FC-3A - NO CAM SYNC SIGNAL AT PCM (DTC 54)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages. Attempt to start engine. If engine will not start, crank engine for at least 10 seconds. Using DRB-II, read fault messages. If DRB-II does not display NO CAM SYNC SIGNAL AT PCM, go to next step. If DRB-II displays NO CAM SYNC SIGNAL AT PCM, go to step 4).
2. At this time, condition required to set fault is not present. NO CAM SYNC SIGNAL AT PCM fault sets if Powertrain Control Module (PCM) does not see a camshaft position sensor signal with crankshaft position sensor signal present. Possible causes are open or shorted camshaft position sensor signal wire, failed camshaft position sensor, and failed PCM. Go to next step.
3. Inspect all related wiring and connectors. Repair as necessary. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If wiring and connectors are okay, see INACTIVE FAULT CONDITION. Perform TEST VER-2.
4. If DRB-II displayed NO CAM SYNC SIGNAL AT PCM in step 1), turn ignition off. Disconnect and inspect distributor connector. Repair as required. Perform TEST VER-2. If distributor connector is okay, go to next step.
5. Turn ignition on. Using DRB-II in voltmeter mode, check voltage of distributor connector (harness side), camshaft position sensor signal circuit (Tan/Yellow wire). If voltage is more than 4 volts, replace camshaft position sensor. Perform TEST VER-2.
6. If voltage is less than 4 volts, turn ignition off. Disconnect PCM connector. Using an external ohmmeter, check resistance of camshaft position sensor signal circuit (Tan/Yellow wire) between distributor connector (harness side) and PCM connector terminal No. 44.
7. If resistance is more than 5 ohms, repair open in Tan/Yellow wire. Perform TEST VER-2. If resistance is less than 5 ohms, go to next step.
8. Using DRB-II in ohmmeter mode, check resistance of PCM connector terminal No. 44, camshaft position sensor signal circuit (Tan/Yellow wire). If resistance is less than 5 ohms, repair short to ground in Tan/Yellow wire. Perform TEST VER-2. If resistance is more than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-4A - NO CHANGE IN MAP FROM START TO RUN (DTC 13)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Turn ignition on. Using DRB-II, erase fault messages. Start engine and let idle for 30 seconds. Using DRB-II, read fault messages. If DRB-II does not display NO CHANGE IN MAP FROM START TO RUN, go to next step. If DRB-II displays NO CHANGE IN MAP FROM START TO RUN, go to step 7).
2. With engine running, set engine speed to 1500 RPM. Using DRB-II, read MAP sensor voltage value. While monitoring MAP sensor voltage, wiggle wiring from MAP sensor to Powertrain Control Module (PCM).
3. If engine stalls or MAP sensor voltage becomes erratic, repair wiring or connector defect between MAP sensor and PCM. Perform TEST VER-2. If engine does not stall or MAP sensor voltage does not becomes erratic, go to next step.
4. Using DRB-II, read MAP sensor vacuum value. Snap throttle open and closed. If vacuum does not drop rapidly to zero in. Hg, go to step 6). If vacuum drops rapidly to zero in. Hg, go to next step.
5. At this time, condition required to set fault is not present. NO CHANGE IN MAP FROM START TO RUN fault sets if too small a difference is seen between barometric pressure at key on and manifold vacuum after start-up. Possible causes are restricted or leaking vacuum/pressure to MAP sensor, ice in sensor or passage, and MAP sensor failure.
6. If vacuum did not drop rapidly to zero in. Hg in step 4), remove MAP sensor vacuum line and check for restriction. Remove restriction if present, and reinstall MAP sensor vacuum line. Perform TEST VER-2. If restriction is not present, replace MAP sensor. Perform TEST VER-2.
7. If DRB-II displayed NO CHANGE IN MAP FROM START TO RUN in step 1), turn engine off. Connect a vacuum gauge into vacuum hose to MAP sensor. Start engine and let idle. Read vacuum gauge reading. If vacuum gauge indicates zero in. Hg at idle, repair vacuum signal to MAP sensor. If gauge does not indicate zero in. Hg at idle, go to next step.
8. While monitoring vacuum gauge, snap throttle open and closed. If vacuum does not rapidly drop to zero in. Hg, repair restricted vacuum signal. Perform TEST VER-2.
9. If vacuum rapidly drops to zero in. Hg, turn ignition off. Disconnect MAP sensor connector. Turn ignition on. Using DRB-II in voltmeter mode, check voltage of MAP sensor connector 5-volt sensor feed circuit (Violet/White wire).
10. If voltage is less than 4 volts, repair Violet/White wire to MAP sensor. Perform TEST VER-2. If voltage is more than 4 volts, replace MAP sensor. Perform TEST VER-2.

TEST FC-5A - MAP SENSOR VOLTAGE TOO LOW (DTC 14)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, read MAP sensor voltage value with engine running. If MAP sensor voltage is less than 0.2 volt, go to step 6). If MAP sensor voltage is more than 0.2 volt, turn ignition on (engine off).
2. Using DRB-II, read MAP sensor voltage value. If MAP sensor voltage is less than 1.2 volts, go to step 6). If MAP sensor voltage is more than 1.2 volts, wiggle MAP sensor connector and harness while observing DRB-II display.
3. If MAP sensor voltage changes when MAP sensor connector and harness are wiggled, repair harness or connector that caused voltage change. Perform TEST VER-2. If MAP sensor voltage does not change when MAP sensor connector and harness are wiggled, go to next step.
4. At this time, condition required to set fault is not present. MAP SENSOR VOLTAGE TOO LOW fault sets if MAP sensor output voltage is less than 1.2 volts at start or less than 0.2 volt with engine running. Engine speed must be more than 400 RPM, but less than 1500 RPM, and TPS voltage must be less than one volt. Possible causes are MAP sensor signal wire shorted to ground, MAP sensor shorted internally, and loss of MAP sensor 5-volt supply wire. Go to next step.
5. Inspect MAP sensor wiring and connectors. Repair as required. Perform TEST VER-2. If MAP sensor wiring and connectors are okay, test is complete. Perform TEST VER-2.
6. Turn ignition on (engine off). Disconnect MAP sensor connector. Using DRB-II, read MAP sensor voltage value. If MAP sensor voltage is more than 4 volts, replace MAP sensor. Perform TEST VER-2. If MAP sensor voltage is less than 4 volts, turn ignition off.
7. Disconnect Powertrain Control Module (PCM) connector. Using DRB-II 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 on Dark Green/Red wire. Perform TEST VER-2. If resistance is more than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-6A - MAP SENSOR VOLTAGE TOO HIGH (DTC 14)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Start engine. Using DRB-II, read MAP sensor voltage value. If MAP sensor voltage is more than 4.6 volts, go to step 5). If MAP sensor voltage is less than 4.6 volts, wiggle MAP sensor connector and harness while observing DRB-II display.
2. If MAP sensor voltage changes when MAP sensor connector and harness are wiggled, repair harness or connector that caused voltage change. Perform TEST VER-2. If MAP sensor voltage does not change when MAP sensor connector and harness are wiggled, go to next step.
3. At this time, condition required to set fault is not present. MAP SENSOR VOLTAGE TOO HIGH fault sets if MAP sensor output voltage is more than 4.6 volts at start or with engine running. Engine speed must be more than 400 RPM, but less than 1500 RPM, and TPS voltage must be less than one volt. Possible causes are MAP sensor signal wire open, MAP sensor open internally, MAP sensor ground wire open, and MAP sensor signal wire shorted to voltage. Go to next step.
4. Inspect MAP sensor wiring and connector. Repair wiring and connector as required. Perform TEST VER-2. If wiring and connectors are okay, test is complete. Perform TEST VER-2.
5. If MAP sensor voltage was more than 4.6 volts in step 1), turn ignition off. Disconnect MAP sensor connector. Connect a jumper wire between MAP sensor connector signal circuit (Dark Green/Red wire) and ground circuit (Black/Light Blue wire). Using DRB-II, read MAP sensor voltage value.
6. If MAP sensor voltage is less than one volt, replace MAP sensor. Perform TEST VER-2. If MAP sensor voltage is more than one volt, move jumper wire from MAP sensor connector Black/Light Blue wire to engine ground.
7. Read MAP sensor voltage. If voltage is less than one volt, repair open in MAP sensor Black/Light Blue wire. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If voltage is more than one volt, turn ignition off. Disconnect Powertrain Control Module (PCM).
8. Using external ohmmeter, check resistance of MAP sensor signal circuit (Dark Green/Red wire) between MAP sensor connector and PCM connector terminal No. 1. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2. If it is more than 5 ohms, repair open in Dark Green/Red wire. Perform TEST VER-2.

TEST FC-7A - NO VEHICLE SPEED SENSOR SIGNAL (DTC 15)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Raise and support vehicle under lower control arms, allowing wheels to spin free. Start engine. Using DRB-II, read vehicle speed sensor MPH value. Place transmission in forward gear. If DRB-II does not display 0 MPH, go to next step. If DRB-II displays 0 MPH, go to step 3).
2. If vehicle is equipped with an electronic automatic transmission, go to «TEST FC-7B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-fc-7b-no-vehicle-speed) . If vehicle is not equipped with an electronic automatic transmission, go to «TEST FC-7C»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-fc-7c-no-vehicle-speed) .
3. At this time, condition required to set fault is not present. VEHICLE SPEED SENSOR SIGNAL fault sets when Powertrain Control Module (PCM) does not see a speed signal on PCM terminal No. 47, speed sensor signal circuit (White/Orange wire) for 11 seconds under road load conditions. Possible causes are open or shorted vehicle speed sensor signal wire, failed vehicle speed sensor (except 41TE transmission), failed transmission control module (41TE transmission), and open 8-volt supply to vehicle speed sensor (except 41TE transmission).

TEST FC-7B - NO VEHICLE SPEED SENSOR SIGNAL (DTC 15)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, read electronic automatic transmission faults. If any electronic automatic transmission faults (Codes 50-58) are present, repair transmission as required.
2. If electronic automatic transmission faults are not present, turn ignition off. Disconnect Transmission Control Module (TCM) connector. Turn ignition on. Using DRB-II in voltmeter mode, check voltage of TCM connector terminal No. 58, speed sensor signal circuit (White/Orange wire).
3. If voltage is more than 4 volts, go to step 7). If voltage is less than 4 volts, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect PCM connector and repair as required. Perform TEST VER-2. If PCM connector is okay, go to next step.
4. Using an external ohmmeter, check resistance of speed sensor signal circuit (White/Orange wire) between PCM connector terminal No. 47 and TCM connector terminal No. 58.
5. If resistance is more than 5 ohms, repair open in White/Orange wire. Perform TEST VER-2. If resistance is less than 5 ohms, place DRB-II in ohmmeter mode. Using DRB-II, check resistance of PCM connector terminal No. 47, speed sensor signal circuit (White/Orange wire).
6. If resistance is less than 5 ohms, repair short to ground in White/Orange wire. Perform TEST VER-2. If resistance is more than 5 ohms, replace PCM. Perform TEST VER-2.
7. If voltage was more than 4 volts in step 3), read vehicle speed MPH value using DRB-II. Connect one end of a jumper wire to TCM connector terminal No. 58, speed sensor signal circuit (White/Orange wire).
8. While observing DRB-II vehicle speed MPH display, connect other end of jumper wire to ground. If DRB-II displays vehicle speed more than 0 MPH, replace TCM. Perform TEST VER-2. If DRB-II displays vehicle speed of 0 MPH or less, turn ignition off.
9. Disconnect PCM connector. Using an external ohmmeter, check resistance of speed sensor signal circuit (White/Orange wire) between PCM connector terminal No. 47 and TCM connector terminal No. 58.
10. If resistance is more than 5 ohms, repair open in White/Orange wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-7C - NO VEHICLE SPEED SENSOR SIGNAL (DTC 15)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Turn ignition off. Disconnect vehicle speed sensor connector. Inspect terminals. Repair as required. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If terminals are okay, turn ignition on.
2. Using DRB-II in voltmeter mode, check voltage at vehicle speed sensor connector, 8-volt power supply circuit (Orange wire). If voltage is less than 7 volts, repair open in Orange wire. Perform TEST VER-2. If voltage is more than 7 volts, go to next step.
3. Using DRB-II, check voltage at vehicle speed sensor connector, speed sensor signal circuit (White/Orange wire). If voltage is less than 4 volts, go to «TEST FC-7D»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-fc-7d-no-vehicle-speed) . If voltage is more than 4 volts, go to next step.
4. Connect one end of a jumper wire to vehicle speed sensor connector, speed sensor signal circuit (White/Orange wire). Using DRB-II, read vehicle speed. While observing DRB-II vehicle speed display, connect other end of jumper wire to vehicle speed sensor connector, sensor ground circuit (Black/Light Blue wire).
5. If DRB-II displays more than 0 MPH, replace vehicle speed sensor. Perform TEST VER-2. If DRB-II displays 0 MPH or less, turn ignition off. Using DRB-II in ohmmeter mode, check resistance at vehicle speed sensor connector, sensor ground circuit (Black/Light Blue wire).
6. If resistance is more than 5 ohms, repair Black/Light Blue wire for open to harness splice. Perform TEST VER-2. If less than 5 ohms, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect connector. Repair it as required. Perform TEST VER-2. If connector is okay, go to next step.
7. Using an external ohmmeter, check resistance of vehicle speed sensor signal circuit (White/Orange wire) between PCM connector terminal No. 47 and vehicle speed sensor connector. If resistance is more than 5 ohms, repair open White/Orange wire. Perform TEST VER-2. If it is less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-7D - NO VEHICLE SPEED SENSOR SIGNAL (DTC 15)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect PCM connector terminals. Repair as required. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If PCM connector is okay, go to next step.
2. Using DRB-II in ohmmeter mode, check resistance of PCM connector terminal No. 47, speed sensor signal circuit (White/Orange wire). If resistance is less than 5 ohms, repair short to ground in White/Orange wire. Perform TEST VER-2. If resistance is more than 5 ohms, go to next step.
3. Using an external ohmmeter, check resistance of speed sensor signal circuit (White/Orange wire) between vehicle speed sensor connector and PCM connector terminal No. 47. If resistance is more than 5 ohms, repair open in White/Orange wire. Perform TEST VER-2. If less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-8A - OXYGEN (O2) SENSOR STAYS AT CENTER (DTC 21)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Start engine. Allow engine to reach normal operating temperature. Using DRB-II, set engine speed to 1500 RPM. Read O2 sensor state. If O2 sensor is switching from rich to lean, go to next step. If O2 sensor is not switching from rich to lean, go to step 5).
2. While monitoring DRB-II display, wiggle O2 sensor connector and harness. If O2 sensor is locked on center at any time, repair open harness or connector where wiggling caused O2 sensor to stay at center. Perform TEST VER-2. If O2 sensor is not locked on center at any time, go to next step.
3. At this time, condition required to set fault is not present. O2S STAYS AT CENTER fault sets if O2 sensor output voltage stays at 0.5 volt for 1.5 minutes with engine temperature more than 170°F (76.6°C), and engine running for 2 minutes. Possible causes are O2 sensor circuit open and O2 sensor failure. Go to next step.
4. Inspect O2 sensor wiring and connectors. Repair wiring and connectors as required. Perform TEST VER-2. If wiring and connectors are okay, test is complete. Perform TEST VER-2.
5. If O2 sensor was not switching from rich to lean in step 1), disconnect O2 sensor connector. Using DRB-II in ohmmeter mode, check resistance of O2 sensor connector ground circuit (Black/Light Blue wire).
6. If resistance is more than 5 ohms, repair open in Black/Light Blue wire. Perform TEST VER-2. If less than 5 ohms, go to next step.
7. Connect a jumper wire between O2 sensor connector signal circuit (Black/Dark Green wire) and positive battery terminal. Using DRB-II, read O2 sensor voltage value. If voltage is more than one volt, replace O2 sensor. Perform TEST VER-2. If less than one volt, go to next step.
8. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Disconnect jumper wire. Using an external ohmmeter, check resistance of O2 sensor signal circuit (Black/Dark Green wire) between O2 sensor connector and PCM connector terminal No. 41.
9. If resistance is more than 5 ohms, repair open Black/Dark Green wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-9A - OXYGEN (O2) SENSOR STAYS ABOVE CENTER (RICH) (DTC 52)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, set engine speed to 1500 RPM. Read O2 sensor voltage value. If O2 sensor voltage is always less than 0.5 volt, go to step 3). If O2 sensor voltage is always more than 0.5 volt, check for short to voltage from 12-volt O2 heater feed circuit (Dark Green/Orange wire).
2. Check connectors for dirt and grease build-up. Repair as required. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If connectors are okay, a condition causing engine to run rich is indicated. Go to «TEST NF-1A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l) .
3. At this time, condition required to set fault is not present. O2S STAYS ABOVE CENTER (RICH) fault sets if O2 sensor output voltage stays more than 0.5 volt, but less than 1.2 volts, without changing for more than 8 minutes. Possible causes are high fuel pressure, other engine sensor calibrations, ignition system failure, and fuel contamination. Go to TEST NF-1A.

TEST FC-10A - OXYGEN (O2) SENSOR STAYS BELOW CENTER (LEAN) (DTC 51)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Set parking brake and start engine. Using DRB-II, set engine speed to 1500 RPM. Read O2 sensor voltage value. If O2 sensor voltage is always less than 0.5 volt, go to next step. If O2 sensor voltage is always more than 0.5 volt, go to step 4).
2. If O2 sensor voltage is always zero volts, repair O2 sensor connector signal circuit (Black/Dark Green wire) for short to ground. Perform TEST VER-2. If O2 sensor voltage is not always zero volts, go to next step.
3. Check for tracking from O2 sensor signal circuit (Black/Dark Green wire) to ground. Check connectors for dirt and grease build-up. Repair as required. Perform TEST VER-2. If connectors are okay, a condition causing engine to run lean is indicated. Go to TEST NF-1A.
4. At this time, condition required to set fault is not present. O2S STAYS BELOW CENTER (LEAN) fault sets if O2 sensor output voltage stays less than 0.5 volt without changing for more than 8 minutes. Possible causes are major vacuum leak, low fuel pressure, other engine sensor calibrations, ignition system failure, O2 sensor failure, and fuel contamination. Go to «TEST NF-1A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l) .

TEST FC-11A - OXYGEN (O2) SENSOR SHORTED TO VOLTAGE (DTC 21)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, read O2 sensor voltage value. If O2 sensor voltage is less than 1.2 volts, go to step 3). If O2 sensor voltage is more than 1.2 volts, disconnect right O2 sensor connector.
2. If O2 sensor voltage is less than 1.2 volts with O2 sensor connector disconnected, replace O2 sensor. Perform TEST VER-2. If O2 sensor voltage is more than 1.2 volts with O2 sensor connector disconnected, repair short in O2 sensor signal circuit (Black/Dark Green wire). Perform TEST VER-2.
3. If O2 sensor voltage was less than 1.2 volts in step 1), wiggle O2 sensor connector and harness while observing DRB-II display. If at any time sensor voltage jumps more than 1.2 volts while O2 connector and harness are wiggled, repair connector or harness that caused voltage to jump (short to voltage). Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If O2 sensor voltage does not jump more than 1.2 volts while O2 connector and harness are wiggled, go to next step.
4. At this time, condition required to set fault is not present. O2S SHORTED TO VOLTAGE fault sets if O2 sensor signal wire voltage is more than 1.2 volts. Possible causes are O2 sensor signal circuit (Black/Dark Green wire) shorted to another circuit, dirty/wet connection causing voltage tracking in connector, and O2 sensor failure. Go to next step.
5. Inspect wiring and connectors. Repair as required. Perform TEST VER-2. If wiring and connectors are okay, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Perform TEST VER-2.

TEST FC-12A - ECT SENSOR VOLTAGE TOO LOW (DTC 22)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, read Engine Coolant Temperature (ECT) sensor voltage value. If ECT sensor voltage is less than 0.5 volt, go to step 5). If ECT sensor voltage is more than 0.5 volt, wiggle ECT sensor connector and harness while watching DRB-II display.
2. If ECT sensor voltage changes when ECT connector and harness are wiggled, repair connector or harness that caused voltage to change. Perform TEST VER-2. If ECT sensor voltage does not change when ECT connector and harness are wiggled, go to next step.
3. At this time, condition required to set fault is not present. ECT SENSOR VOLTAGE TOO LOW fault sets if ECT sensor signal circuit (Tan/Black wire) is more than 0.5 volt. Possible causes are ECT sensor circuit shorted to ground and ECT sensor open internally. Go to next step.
4. Inspect wiring and connectors. Repair as required. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If wiring and connectors are okay, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Perform TEST VER-2.
5. If ECT sensor voltage was less than 0.5 volt in step 1), disconnect ECT sensor connector. Using DRB-II, read ECT sensor voltage value. If voltage is more than 4 volts, replace ECT sensor. Perform TEST VER-2.
6. If voltage is less than 4 volts, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using DRB-II in ohmmeter mode, check resistance of ECT sensor connector, ECT signal circuit (Tan/Black wire).
7. If resistance is less than 5 ohms, repair Tan/Black wire for short to ground. Perform TEST VER-2. If resistance is more than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-13A - ECT SENSOR VOLTAGE TOO HIGH (DTC 22)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, read Engine Coolant Temperature (ECT) sensor voltage value. If ECT sensor voltage is more than 4.5 volts, go to step 5). If ECT sensor voltage is less than 4.5 volts, wiggle ECT sensor connector and harness while watching DRB-II display.
2. If ECT sensor voltage changes when ECT connector and harness are wiggled, repair connector or harness that caused voltage to change. Perform TEST VER-2. If ECT sensor voltage does not change when ECT connector and harness are wiggled, go to next step.
3. At this time, condition required to set fault is not present. ECT SENSOR VOLTAGE TOO HIGH fault sets if ECT sensor signal circuit (Tan/Black wire) is more than 4.9 volts. Possible causes are ECT sensor circuit open, ECT sensor open internally, and ECT sensor ground wire open. Go to next step.
4. Inspect wiring and connectors. Repair as required. Perform TEST VER-2. If wiring and connectors are okay, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) .
5. If ECT sensor voltage was more than 4.5 volts in step 1), disconnect ECT sensor connector. Connect a jumper wire between ECT sensor connector, ECT sensor signal circuit (Tan/Black wire) and sensor ground circuit (Black/Light Blue wire).
6. Using DRB-II, read ECT sensor voltage. If voltage is less than one volt, replace ECT sensor. Perform TEST VER-2. If voltage is more than one volt, move jumper wire from Black/Light Blue wire to engine ground. Read ECT sensor voltage value.
7. If voltage is less than one volt, repair open Black/Light Blue wire. Perform TEST VER-2. If ECT sensor voltage is more than one volt, disconnect Powertrain Control Module (PCM) connector.
8. Using an external ohmmeter, check resistance of ECT sensor signal circuit (Tan/Black wire) between ECT sensor connector and PCM connector terminal No. 2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2. If resistance is more than 5 ohms, repair open in Tan/Black wire. Perform TEST VER-2.

TEST FC-14A - THROTTLE POSITION SENSOR VOLTAGE LOW (DTC 24)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, read Throttle Position Sensor (TPS) voltage value. If TPS voltage is less than 0.2 volt, go to step 6). If TPS voltage is more than 0.2 volt, slowly open and close throttle while monitoring DRB-II.
2. If voltage does not change smoothly when throttle is opened and closed, replace TPS. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If voltage changes smoothly when throttle is opened and closed, go to next step.
3. Wiggle TPS connectors and harnesses while watching DRB-II. If TPS voltage changes when TPS connectors and harnesses are wiggled, repair connectors or harnesses that caused voltage to change. Perform TEST VER-2. If TPS voltage does not change when TPS connectors and harnesses are wiggled, go to next step.
4. At this time, condition required to set fault is not present. THROTTLE POSITION SENSOR VOLTAGE LOW fault sets if TPS voltage is less than 0.2 volt or if vehicle speed is more than 20 MPH, engine speed is more than 1500 RPM, and engine vacuum is less than 2 in. Hg with TPS voltage less than 0.5 volt. Possible causes are TPS signal wire shorted to ground, TPS sensor failure, and loss of 5-volt supply. Go to next step.
5. Inspect wiring and connectors. Repair as required. Perform TEST VER-2. If wiring and connectors are okay, problem does not exist at this time. Perform TEST VER-2.
6. If TPS voltage was less than 0.2 volt in step 1), disconnect TPS connector. Using DRB-II, read TPS voltage value. If TPS voltage is less than one volt, replace TPS. Perform TEST VER-2.
7. If TPS voltage is more than one volt, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Place DRB-II in ohmmeter mode. Using DRB-II, check resistance of TPS connector signal circuit (Orange/Dark Blue wire).
8. If resistance is less than 5 ohms, repair Orange/Dark Blue wire for short to ground. Perform TEST VER-2. If resistance is more than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-15A - THROTTLE POSITION SENSOR VOLTAGE HIGH (DTC 24)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, read Throttle Position Sensor (TPS) voltage value. If TPS voltage is more than 4.5 volts, go to step 6). If TPS voltage is less than 4.5 volts, slowly open and close throttle while monitoring DRB-II.
2. If voltage does not change smoothly when throttle is opened and closed, replace TPS. Perform TEST VER-2. If voltage changes smoothly when throttle is opened and closed, go to next step.
3. Wiggle TPS connectors and harnesses while watching DRB-II display. If TPS voltage changes when TPS connectors and harnesses are wiggled, repair connectors or harnesses that caused voltage to change. Perform TEST VER-2. If TPS voltage does not change when TPS connectors and harnesses are wiggled, go to next step.
4. At this time, condition required to set fault is not present. THROTTLE POSITION SENSOR VOLTAGE HIGH fault sets if TPS voltage is more than 4.5 volts. Possible causes are TPS output wire open, TPS ground wire open, and TPS failure. Go to next step.
5. Inspect wiring and connectors. Repair as required. Perform TEST VER-2. If wiring and connectors are okay, see INACTIVE FAULT CONDITION. Perform TEST VER-2.
6. If TPS voltage was more than 4.5 volts in step 1), disconnect TPS connector. Connect a jumper wire between TPS connector, signal circuit (Orange/Dark Blue wire) and sensor ground circuit (Black/Light Blue wire).
7. Using DRB-II, read TPS voltage value. If TPS voltage is less than one volt, replace TPS. Perform TEST VER-2. If TPS voltage is more than one volt, move jumper wire from Black/Light Blue wire to engine ground.
8. Read TPS voltage value. If voltage is less than one volt, repair open in Black/Light Blue wire. Perform TEST VER-2. If voltage is more than one volt, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using external ohmmeter, check resistance of sensor signal circuit (Orange/Dark Blue wire) between PCM connector terminal No. 22 and TPS connector.
9. If resistance is more than 5 ohms, repair Orange/Dark Blue wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-16A - IDLE AIR CONTROL MOTOR CIRCUITS (DTC 25)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages. Turn ignition off. Start engine. Allow engine to reach operating temperature. Using DRB-II, read fault messages. If Idle Air Control (IAC) motor fault message does not return, go to next step. If IAC motor fault message returns, go to step 5).
2. Using DRB-II, set engine speed to 1800 RPM and then 700 RPM. If engine speed responds to DRB-II command, go to next step. If engine speed does not respond to DRB-II command, go to step 5).
3. At this time, condition required to set fault is not present. IDLE AIR CONTROL MOTOR CIRCUITS fault sets if any of 4 wires are shorted to ground or to 12 volts. Possible causes are harness shorted to ground, harness shorted to 12 volts, IAC motor shorted internally, and IAC wires shorted together.
4. Inspect wiring and connectors. Repair as required. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If wiring and connectors are okay, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Perform TEST VER-2.
5. Turn ignition off. Disconnect IAC motor connector and Powertrain Control Module (PCM) connector. Using DRB-II in ohmmeter mode, check resistance of all IAC motor connector terminals.
6. If resistance is less than 5 ohms at any wire, repair IAC wiring for a short to ground. Perform TEST VER-2. If resistance is more than 5 ohms at all wires, go to next step.
7. Turn ignition off. Using an external ohmmeter, check resistance of each wire between IAC motor connector and PCM connector. See PCM TERMINAL IDENTIFICATION table. If resistance for any wire is more than 5 ohms, repair open on necessary wire. Perform TEST VER-2. If resistance for all wires is less than 5 ohms, go to next step. PCM TERMINAL IDENTIFICATION Wire Color Terminal No. Gray/Red 39 Brown/White 40 Violet/Black 59 Yellow/Black 60
8. Using an external ohmmeter, check resistance between following wires at IAC motor connector. Record resistance readings. Violet/Black and Brown/White wires Violet/Black and Yellow/Black wires Violet/Black and Gray/Red wires Brown/White and Yellow/Black wires Brown/White and Gray/Red wires Yellow/Black and Gray/Red wires
9. If resistance between any 2 wires is less than 5 ohms, repair those wires for shorting together. Perform TEST VER-2. If resistance between all pairs of wires is more than 5 ohms, reconnect PCM connector.
10. Turn ignition on. Using DRB-II, actuate IAC motor. Using DRB-II in voltmeter mode, check voltage on each IAC motor connector wire at IAC motor connector. Normal voltage reading will switch from less than one volt to more than 10 volts.
11. If voltage is switching at each IAC motor connector wire, replace IAC motor. Perform TEST VER-2. If voltage is not switching at each IAC motor connector wire, replace PCM. Perform TEST VER-2.

TEST FC-17A - INJECTOR NO. 1 CONTROL CIRCUIT (DTC 27)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages. Attempt to start engine. If engine will not start, crank engine for at least 10 seconds.
2. Using DRB-II, read fault messages. If engine started, allow engine to idle for at least 20 seconds. If DRB-II does not display INJECTOR NO. 1 CONTROL CIRCUIT, go to next step. If DRB-II displays INJECTOR NO. 1 CONTROL CIRCUIT, go to step 6).
3. At this time, condition required to set fault is not present. INJECTOR NO. 1 CONTROL CIRCUIT fault sets if Powertrain Control Module (PCM) does not detect injector "turn-off edge" when expected. Possible causes are open or shorted injector control circuit, open injector power supply circuit, open injector, and failed driver in PCM. Go to next step.
4. Inspect all related wiring and connectors and repair as necessary. Perform TEST VER-2. If no problems are found with wiring and connectors, go to next step.
5. Start engine. Wiggle wiring harness from injector No. 1 to PCM. If engine misfires or stalls, repair wiring harness as necessary. Perform TEST VER-2. If engine does not misfire or stall, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) .
6. If DRB-II displayed INJECTOR NO. 1 CONTROL CIRCUIT in step 2), turn ignition off. Disconnect 8-pin injector harness connector. Using an external ohmmeter, check resistance of injector harness connector (injector side) between injector driver No. 1 circuit (White/Dark Blue wire) and Auto Shutdown (ASD) output circuit (Dark Green/Orange wire). If resistance is not 10-15 ohms, go to «TEST FC-17B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-fc-17b-injector-no-1) .
7. If resistance is 10-15 ohms, move ohmmeter lead from Dark Green/Orange wire to ground. If resistance is less than 5 ohms, repair short to ground in White/Dark Blue wire. Perform TEST VER-2.
8. If resistance is more than 5 ohms, turn ignition on. Using DRB-II, actuate ASD relay. Using DRB-II in voltmeter mode, check voltage of injector harness connector (PCM side), ASD output circuit (Dark Green/Orange wire). If voltage is less than 10 volts, repair open in Dark Green/Orange wire. Perform TEST VER-2.
9. If voltage is more than 10 volts, turn ignition off. Disconnect PCM connector. Using DRB-II in ohmmeter mode, check resistance of PCM connector terminal No. 16, injector driver No. 1 circuit (White/Dark Blue wire).
10. If resistance is less than 5 ohms, repair short in White/Dark Blue wire. Perform TEST VER-2. If resistance is more than 5 ohms, go to next step.
11. Using external ohmmeter, check resistance of injector driver No. 1 circuit (White/Dark Blue wire) between PCM connector terminal No. 16 and PCM side of injector harness connector. If resistance exceeds 5 ohms, repair open in White/Dark Blue wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-17B - INJECTOR NO. 1 CONTROL CIRCUIT (DTC 27)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

Note. If necessary, remove intake plenum during this procedure.

1. Reconnect 8-pin injector harness connector. Disconnect injector No. 1 connector. Turn ignition on. Using DRB-II, actuate Auto Shutdown (ASD) relay.
2. Using DRB-II in voltmeter mode, check voltage of injector No. 1 connector, ASD output circuit (Dark Green/Orange wire). If voltage is less than 10 volts, repair open in Dark Green/Orange wire. Perform TEST VER-2. If voltage is more than 10 volts, turn ignition off. Go to next step.
3. Disconnect 8-pin injector harness connector. Using an external ohmmeter, check resistance of injector driver No. 1 circuit (White/Dark Blue wire) between injector No. 1 connector and injector harness connector (injector side).
4. If resistance is more than 5 ohms, repair open in White/Dark Blue wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace injector. Perform TEST VER-2.

TEST FC-18A - INJECTOR NO. 2 CONTROL CIRCUIT (DTC 27)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages. Attempt to start engine. If engine will not start, crank engine for at least 10 seconds.
2. Using DRB-II, read fault messages. If engine started, allow engine to idle for at least 20 seconds. If DRB-II does not display INJECTOR NO. 2 CONTROL CIRCUIT, go to next step. If DRB-II displays INJECTOR NO. 2 CONTROL CIRCUIT, go to step 6).
3. At this time, condition required to set fault is not present. INJECTOR NO. 2 CONTROL CIRCUIT fault sets if Powertrain Control Module (PCM) does not detect injector "turn-off edge" when expected. Possible causes are open or shorted injector control circuit, open injector power supply circuit, open injector, and failed driver in PCM. Go to next step.
4. Inspect all related wiring and connectors and repair as necessary. Perform TEST VER-2. If no problems are found with wiring and connectors, go to next step.
5. Start engine. Wiggle wiring harness from injector No. 2 to PCM. If engine misfires or stalls, repair wiring harness as necessary. Perform TEST VER-2. If engine does not misfire or stall, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) .
6. If DRB-II displayed INJECTOR NO. 2 CONTROL CIRCUIT in step 2), turn ignition off. Disconnect 8-pin injector harness connector. Using an external ohmmeter, check resistance of injector harness connector (injector side) between injector driver No. 2 circuit (Brown wire) and Auto Shutdown (ASD) output circuit (Dark Green/Orange wire). If resistance is not 10-15 ohms, go to «TEST FC-18B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-fc-18b-injector-no-2) .
7. If resistance is 10-15 ohms, move ohmmeter lead from Dark Green/Orange wire to ground. If resistance is less than 5 ohms, repair Brown wire for short to ground. Perform TEST VER-2.
8. If resistance is more than 5 ohms, turn ignition on. Using DRB-II, actuate ASD relay. Using DRB-II in voltmeter mode, check voltage of injector harness connector (PCM side), ASD output circuit (Dark Green/Orange wire). If voltage is less than 10 volts, repair open in Dark Green/Orange wire. Perform TEST VER-2.
9. If voltage is more than 10 volts, turn ignition off. Disconnect PCM connector. Using DRB-II in ohmmeter mode, check resistance of PCM connector terminal No. 15, injector driver No. 2 circuit (Tan wire).
10. If resistance is less than 5 ohms, repair short in Tan wire. Perform TEST VER-2. If resistance is more than 5 ohms, go to next step.
11. Using external ohmmeter, check resistance of injector driver No. 2 circuit (Tan wire) between PCM connector terminal No. 15 and PCM side of injector harness connector. If resistance is more than 5 ohms, repair open in Tan wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-18B - INJECTOR NO. 2 CONTROL CIRCUIT (DTC 27)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

Note. If necessary, remove intake plenum during this procedure.

1. Reconnect 8-pin injector harness connector. Disconnect injector No. 2 connector. Turn ignition on. Using DRB-II, actuate Auto Shutdown (ASD) relay.
2. Using DRB-II in voltmeter mode, check voltage of injector No. 2 connector, ASD output circuit (Dark Green/Yellow wire). If voltage is less than 10 volts, repair open in Dark Green/Yellow wire. Perform TEST VER-2. If voltage is more than 10 volts, turn ignition off. Go to next step.
3. Disconnect 8-pin injector harness connector. Using an external ohmmeter, check resistance of injector driver No. 2 circuit (Brown wire) between injector No. 2 connector and injector harness connector (injector side).
4. If resistance is more than 5 ohms, repair open in Brown wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace injector. Perform TEST VER-2.

TEST FC-19A - INJECTOR NO. 3 CONTROL CIRCUIT (DTC 27)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages. Attempt to start engine. If engine will not start, crank engine for at least 10 seconds.
2. Using DRB-II, read fault messages. If engine started, allow engine to idle for at least 20 seconds. If DRB-II does not display INJECTOR NO. 3 CONTROL CIRCUIT, go to next step. If DRB-II displays INJECTOR NO. 3 CONTROL CIRCUIT, go to step 6).
3. At this time, condition required to set fault is not present. INJECTOR NO. 3 CONTROL CIRCUIT fault sets if Powertrain Control Module (PCM) does not detect injector "turn-off edge" when expected. Possible causes are open or shorted injector control circuit, open injector power supply circuit, open injector, and failed driver in PCM. Go to next step.
4. Inspect all related wiring and connectors and repair as necessary. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If no problems are found with wiring and connectors, go to next step.
5. Start engine. Wiggle wiring harness from injector No. 3 to PCM. If engine misfires or stalls, repair wiring harness as necessary. Perform TEST VER-2. If engine does not misfire or stall, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Perform TEST VER-2.
6. If DRB-II displayed INJECTOR NO. 3 CONTROL CIRCUIT in step 2), turn ignition off. Disconnect 8-pin injector harness connector. Using an external ohmmeter, check resistance of injector harness connector (injector side) between injector driver No. 3 circuit (Yellow/White wire) and Auto Shutdown (ASD) output circuit (Dark Green/Orange wire). If resistance is not 10-15 ohms, go to «TEST FC-19B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-fc-19b-injector-no-3) .
7. If resistance is 10-15 ohms, move ohmmeter lead from Dark Green/Orange wire to ground. If resistance is less than 5 ohms, repair short to ground in Yellow/White wire. Perform TEST VER-2.
8. If resistance is more than 5 ohms, turn ignition on. Using DRB-II, actuate ASD relay. Using DRB-II in voltmeter mode, check voltage of injector harness connector (PCM side), ASD output circuit (Dark Green/Orange wire). If voltage is less than 10 volts, repair open in Dark Green/Orange wire. Perform TEST VER-2.
9. If voltage is more than 10 volts, turn ignition off. Disconnect PCM connector. Using DRB-II in ohmmeter mode, check resistance of PCM connector terminal No. 14, injector driver No. 3 circuit (Yellow/White wire).
10. If resistance is less than 5 ohms, repair short in Yellow/White wire. Perform TEST VER-2. If it is more than 5 ohms, go to next step.
11. Using external ohmmeter, check resistance of injector driver No. 3 circuit (Yellow/White wire) between PCM connector terminal No. 14 and PCM side of injector harness connector. If resistance is more than 5 ohms, repair open in Yellow/White wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-19B - INJECTOR NO. 3 CONTROL CIRCUIT (DTC 27)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

Note. If necessary, remove intake plenum during this procedure.

1. Reconnect 8-pin injector harness connector. Disconnect injector No. 3 connector. Turn ignition on. Using DRB-II, actuate Auto Shutdown (ASD) relay.
2. Using DRB-II in voltmeter mode, check voltage of injector No. 3 connector, ASD output circuit (Dark Green/Yellow wire). If voltage is less than 10 volts, repair open in Dark Green/Yellow wire. Perform TEST VER-2. If voltage is more than 10 volts, turn ignition off. Go to next step.
3. Disconnect 8-pin injector harness connector. Using an external ohmmeter, check resistance of injector driver No. 3 circuit (Yellow/White wire) between injector No. 3 connector and injector harness connector (injector side).
4. If resistance is more than 5 ohms, repair open in Yellow/White wire. Perform TEST VER-2. If it is less than 5 ohms, replace injector. Perform TEST VER-2.

TEST FC-20A - INJECTOR NO. 4 CONTROL CIRCUIT (DTC 27)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages. Attempt to start engine. If engine will not start, crank engine for at least 10 seconds.
2. Using DRB-II, read fault messages. If engine starts, allow engine to idle for at least 20 seconds. If DRB-II does not display INJECTOR NO. 4 CONTROL CIRCUIT, go to next step. If DRB-II displays INJECTOR NO. 4 CONTROL CIRCUIT, go to step 6).
3. At this time, condition required to set fault is not present. INJECTOR NO. 4 CONTROL CIRCUIT fault sets if Powertrain Control Module (PCM) does not detect injector "turn-off edge" when expected. Possible causes are open or shorted injector control circuit, open injector power supply circuit, open injector, and failed driver in PCM. Go to next step.
4. Inspect all related wiring and connectors and repair as necessary. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If no problems are found with wiring and connectors, go to next step.
5. Start engine. Wiggle wiring harness from injector No. 4 to PCM. If engine misfires or stalls, repair wiring harness as necessary. Perform TEST VER-2. If engine does not misfire or stall, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) .
6. If DRB-II displayed INJECTOR NO. 4 CONTROL CIRCUIT in step 2), turn ignition off. Disconnect 8-pin injector harness connector. Using an external ohmmeter, check resistance of injector harness connector (injector side) between injector driver No. 4 circuit (Light Blue/Brown wire) and Auto Shutdown (ASD) output circuit (Dark Green/Orange wire). If resistance is not 10-15 ohms, go to «TEST FC-20B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-fc-20b-injector-no-4) .
7. If resistance is 10-15 ohms, move ohmmeter lead from Dark Green/Orange wire to ground. If resistance is less than 5 ohms, repair Light Blue/Brown wire for a short to ground. Perform TEST VER-2.
8. If resistance is more than 5 ohms, turn ignition on. Using DRB-II, actuate ASD relay. Using DRB-II in voltmeter mode, check voltage of injector harness connector (PCM side), ASD output circuit (Dark Green/Orange wire). If voltage is less than 10 volts, repair open in Dark Green/Orange wire. Perform TEST VER-2.
9. If voltage is more than 10 volts, turn ignition off. Disconnect PCM connector. Using DRB-II in ohmmeter mode, check resistance of PCM connector terminal No. 13, injector driver No. 4 circuit (Light Blue/Brown wire).
10. If resistance is less than 5 ohms, repair short in Light Blue/Brown wire. Perform TEST VER-2. If it is more than 5 ohms, go to next step.
11. Using external ohmmeter, check resistance of injector driver No. 4 circuit (Light Blue/Brown wire) between PCM connector terminal No. 13 and PCM side of injector harness connector. If resistance exceeds 5 ohms, repair open in Light Blue/Brown wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-20B - INJECTOR NO. 4 CONTROL CIRCUIT (DTC 27)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

Note. If necessary, remove intake plenum during this procedure.

1. Reconnect 8-pin injector harness connector. Disconnect injector No. 4 connector. Turn ignition on. Using DRB-II, actuate Auto Shutdown (ASD) relay.
2. Using DRB-II in voltmeter mode, check voltage of injector No. 4 connector, ASD output circuit (Dark Green/Light Blue wire). If voltage is less than 10 volts, repair open in Dark Green/Light Blue wire. Perform TEST VER-2. If voltage is more than 10 volts, turn ignition off. Go to next step.
3. Disconnect 8-pin injector harness connector. Using an external ohmmeter, check resistance of injector driver No. 4 circuit (Light Blue/Brown wire) between injector No. 4 connector and injector harness connector (injector side).
4. If resistance is more than 5 ohms, repair open in Light Blue/Brown wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace injector. Perform TEST VER-2.

TEST FC-21A - INJECTOR NO. 5 CONTROL CIRCUIT (DTC 27)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages. Attempt to start engine. If engine will not start, crank engine for at least 10 seconds.
2. Using DRB-II, read fault messages. If engine started, allow engine to idle for at least 20 seconds. If DRB-II does not display INJECTOR NO. 5 CONTROL CIRCUIT, go to next step. If DRB-II displays INJECTOR NO. 5 CONTROL CIRCUIT, go to step 6).
3. At this time, condition required to set fault is not present. INJECTOR NO. 5 CONTROL CIRCUIT fault sets if Powertrain Control Module (PCM) does not detect injector "turn-off edge" when expected. Possible causes are open or shorted injector control circuit, open injector power supply circuit, open injector, and failed driver in PCM. Go to next step.
4. Inspect all related wiring and connectors and repair as necessary. Perform TEST VER-2. If no problems are found with wiring and connectors, go to next step.
5. Start engine. Wiggle wiring harness from injector No. 5 to PCM. If engine misfires or stalls, repair wiring harness as necessary. Perform TEST VER-2. If engine does not misfire or stall, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) .
6. If DRB-II displayed INJECTOR NO. 5 CONTROL CIRCUIT in step 2), turn ignition off. Disconnect 8-pin injector harness connector. Using an external ohmmeter, check resistance of injector harness connector (injector side) between injector driver No. 5 circuit (Gray wire) and Auto Shutdown (ASD) output circuit (Dark Green/Orange wire). If resistance is not 10-15 ohms, go to «TEST FC-21B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-fc-21b-injector-no-5) .
7. If resistance is 10-15 ohms, move ohmmeter lead from Dark Green/Orange wire to ground. If resistance is less than 5 ohms, repair Gray wire for short to ground. Perform TEST VER-2.
8. If resistance is more than 5 ohms, turn ignition on. Using DRB-II, actuate ASD relay. Using DRB-II in voltmeter mode, check voltage of injector harness connector (PCM side), ASD output circuit (Dark Green/Orange wire). If voltage is less than 10 volts, repair open in Dark Green/Orange wire. Perform TEST VER-2.
9. If voltage is more than 10 volts, turn ignition off. Disconnect PCM connector. Using DRB-II in ohmmeter mode, check resistance of PCM connector terminal No. 38, injector driver No. 5 circuit (Gray wire).
10. If resistance is less than 5 ohms, repair short in Gray wire. Perform TEST VER-2. If resistance is more than 5 ohms, go to next step.
11. Using external ohmmeter, check resistance of injector driver No. 5 circuit (Gray wire) between PCM connector terminal No. 38 and PCM side of injector harness connector. If resistance is more than 5 ohms, repair open in Gray wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-21B - INJECTOR NO. 5 CONTROL CIRCUIT (DTC 27)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

Note. If necessary, remove intake plenum during this procedure.

1. Reconnect 8-pin injector harness connector. Disconnect injector No. 5 connector. Turn ignition on. Using DRB-II, actuate Auto Shutdown (ASD) relay.
2. Using DRB-II in voltmeter mode, check voltage of injector No. 5 connector, ASD output circuit (Dark Green/Light Blue wire). If voltage is less than 10 volts, repair open in Dark Green/Light Blue wire. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If voltage is more than 10 volts, turn ignition off. Go to next step.
3. Disconnect 8-pin injector harness connector. Using an external ohmmeter, check resistance of injector driver No. 5 circuit (Gray wire) between injector No. 5 connector and injector harness connector (injector side). If resistance is more than 5 ohms, repair open in Gray wire. Perform TEST VER-2. If less than 5 ohms, replace injector. Perform TEST VER-2.

TEST FC-22A - INJECTOR NO. 6 CONTROL CIRCUIT (DTC 27)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages. Attempt to start engine. If engine will not start, crank engine for at least 10 seconds.
2. Using DRB-II, read fault messages. If engine started, allow engine to idle for at least 20 seconds. If DRB-II does not display INJECTOR NO. 6 CONTROL CIRCUIT, go to next step. If DRB-II displays INJECTOR NO. 6 CONTROL CIRCUIT, go to step 6).
3. At this time, condition required to set fault is not present. INJECTOR NO. 6 CONTROL CIRCUIT fault sets if Powertrain Control Module (PCM) does not detect injector "turn-off edge" when expected. Possible causes are open or shorted injector control circuit, open injector power supply circuit, open injector, and failed driver in PCM. Go to next step.
4. Inspect all related wiring and connectors and repair as necessary. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If no problems are found with wiring and connectors, go to next step.
5. Start engine. Wiggle wiring harness from injector No. 6 to PCM. If engine misfires or stalls, repair wiring harness as necessary. Perform TEST VER-2. If engine does not misfire or stall, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Perform TEST VER-2.
6. If DRB-II displayed INJECTOR NO. 6 CONTROL CIRCUIT in step 2), turn ignition off. Disconnect 8-pin injector harness connector. Using an external ohmmeter, check resistance of injector harness connector (injector side) between injector driver No. 6 circuit (Brown/Dark Blue wire) and Auto Shutdown (ASD) output circuit (Dark Green/Orange wire). If resistance is not 10-15 ohms, go to «TEST FC-22B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-fc-22b-injector-no-6) .
7. If resistance is 10-15 ohms, move ohmmeter lead from Dark Green/Orange wire to ground. If resistance is less than 5 ohms, repair Brown/Dark Blue wire for a short to ground. Perform TEST VER-2.
8. If resistance is more than 5 ohms, turn ignition on. Using DRB-II, actuate ASD relay. Using DRB-II in voltmeter mode, check voltage of injector harness connector (PCM side), ASD output circuit (Dark Green/Orange wire). If voltage is less than 10 volts, repair open in Dark Green/Orange wire. Perform TEST VER-2.
9. If voltage is more than 10 volts, turn ignition off. Disconnect PCM connector. Using DRB-II in ohmmeter mode, check resistance of PCM connector terminal No. 58, injector driver No. 6 circuit (Brown/Dark Blue wire).
10. If resistance is less than 5 ohms, repair short in Brown/Dark Blue wire. Perform TEST VER-2. If it is more than 5 ohms, go to next step.
11. Using external ohmmeter, check resistance of injector driver No. 6 circuit (Brown/Dark Blue wire) between PCM connector terminal No. 58 and PCM side of injector harness connector. If resistance exceeds 5 ohms, repair open in Brown/Dark Blue wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-22B - INJECTOR NO. 6 CONTROL CIRCUIT (DTC 27)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

Note. If necessary, remove intake plenum during this procedure.

1. Reconnect 8-pin injector harness connector. Disconnect injector No. 6 connector. Turn ignition on. Using DRB-II, actuate Auto Shutdown (ASD) relay.
2. Using DRB-II in voltmeter mode, check voltage of injector No. 6 connector, ASD output circuit (Dark Green/Brown wire). If voltage is less than 10 volts, repair open in Dark Green/Brown wire. Perform TEST VER-2. If voltage is more than 10 volts, turn ignition off. Go to next step.
3. Disconnect 8-pin injector harness connector. Using an external ohmmeter, check resistance of injector driver No. 6 circuit (Brown/Dark Blue wire) between injector No. 6 connector and injector harness connector (injector side).
4. If resistance is more than 5 ohms, repair open in Brown/Dark Blue wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace injector. Perform TEST VER-2.

TEST FC-23A - PCM FAILURE SRI MILE NOT STORED OR PCM FAILURE EEPROM WRITE DENIED (DTC 62 OR 63)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Turn ignition on. Using DRB-II, perform Service Reminder Indicator (SRI) memory test. If DRB-II displays WRITE FAILURE, replace Powertrain Control Module (PCM). Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) .
2. If DRB-II displays WRITE REFUSED, go to step 4). If DRB-II displays SRI MILEAGE INVALID, update mileage and retest SRI memory. Perform TEST VER-2. If DRB-II does not display SRI MILEAGE INVALID, compare SRI mileage stored with instrument panel odometer.
3. If mileage is same, retest SRI memory. Perform TEST VER-2. If mileage is not same, update mileage and retest SRI memory. Perform TEST VER-2.
4. If DRB-II displayed WRITE REFUSED in step 2), PCM was busy. Using DRB-II, perform SRI memory test. Retest SRI memory 2 or more times, if necessary. If WRITE REFUSED fault returns, replace PCM. Perform TEST VER-2. If WRITE REFUSED does not return, test is complete. Perform TEST VER-2.

TEST FC-24A - EGR SYSTEM FAILURE (DTC 32)

1. Start engine. Allow engine to idle for 2 minutes. Disconnect vacuum supply hose to EGR solenoid. Connect a vacuum gauge to disconnected hose. If vacuum gauge reading is less than 10 in. Hg, repair vacuum supply hose to EGR solenoid.
2. If vacuum gauge reading is more than 10 in. Hg, reconnect vacuum hose to EGR solenoid. Disconnect vacuum hose from EGR valve. Connect a vacuum gauge to disconnected hose. While observing vacuum gauge, momentarily increase engine speed to more than 2000 RPM.
3. If vacuum gauge reading is more than 5 in. Hg when throttle is opened, go to next step. If vacuum gauge reading is less than 5 in. Hg when throttle is opened, replace EGR valve assembly.
4. Remove vacuum gauge. Connect a vacuum pump to EGR valve nipple. With engine idling, slowly apply vacuum to EGR valve while observing engine idle speed. If engine idles rough or stalls when vacuum is applied, go to step 6).
5. If engine does not idle rough or stall when vacuum is applied, remove EGR valve and inspect manifold and tube for restrictions. Repair as required. Perform TEST VER-2. If no restrictions are found, replace EGR valve assembly. Perform TEST VER-2.
6. If engine idled rough or stalled when vacuum was applied in step 4), turn ignition off. Apply vacuum to EGR valve nipple. Observe vacuum gauge. If vacuum does not hold for at least 10 seconds, replace EGR valve assembly. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If vacuum holds for at least 10 seconds, go to next step.
7. At this time, condition required to set fault is not present. EGR SYSTEM FAILURE fault occurs when Powertrain Control Module (PCM) performs a test of EGR system and monitors O2 sensor signal for a change. Possible causes are EGR valve not opening, EGR transfer tube blocked, and EGR passage in manifold blocked. Go to next step.
8. Inspect vacuum hoses and connectors. Repair as required. Perform TEST VER-2. If vacuum hoses and connections are okay, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Perform TEST VER-2.

TEST FC-25A - EGR SOLENOID CIRCUIT (DTC 32)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages. Actuate EGR solenoid. Using DRB-II, read faults. If DRB-II does not display EGR SOLENOID CIRCUIT, go to next step. If it displays EGR SOLENOID CIRCUIT, go to step 5).
2. At this time, condition required to set fault is not present. EGR SOLENOID CIRCUIT fault is set when solenoid is not in its proper state when monitored by Powertrain Control Module (PCM). Possible causes are open or shorted solenoid, open power supply circuit, open or shorted control circuit, and failed PCM. Go to next step.
3. Inspect wiring and connectors. Repair as required. Perform TEST VER-2. If wiring and connectors are okay, read faults using DRB-II. Actuator test should still be running. Wiggle wiring harness from EGR solenoid to PCM.
4. If EGR SOLENOID CIRCUIT fault returns while wiring harness is wiggled, repair harness where wiggling caused problem to appear. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If EGR SOLENOID CIRCUIT fault does not return while wiring harness is wiggled, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Test is complete. Perform TEST VER-2.
5. If DRB-II displayed EGR SOLENOID CIRCUIT in step 1), turn ignition off. Disconnect EGR solenoid connector. Turn ignition on. Using DRB-II in voltmeter mode, check voltage of EGR solenoid connector, ignition 12-volt feed circuit (Dark Blue wire).
6. If voltage is less than 10 volts, repair open in Dark Blue wire. Perform TEST VER-2. If voltage is less than 10 volts, turn ignition off. Disconnect PCM connector. Go to next step.
7. Using an external ohmmeter, check resistance of EGR solenoid control circuit (Gray/Yellow wire) between PCM connector terminal No. 35 and EGR solenoid connector. If resistance is less than 5 ohms, repair Gray/Yellow wire for a short to ground. Perform TEST VER-2. If resistance is more than 5 ohms, reconnect EGR solenoid connector. Turn ignition on.
8. Using DRB-II in voltmeter mode, check voltage of PCM connector terminal No. 35, EGR solenoid control circuit (Gray/Yellow wire). If voltage is less than 10 volts, replace EGR solenoid. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If voltage is more than 10 volts, replace PCM. Perform TEST VER-2.

TEST FC-26A - EVAP PURGE SOLENOID CIRCUIT (DTC 31)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase faults. Actuate EVAP purge solenoid. Using DRB-II, read faults. If DRB-II does not display EVAP PURGE SOLENOID CIRCUIT, go to next step. If DRB-II displays EVAP PURGE SOLENOID CIRCUIT, go to step 6).
2. At this time, condition required to set fault is not present. EVAP PURGE SOLENOID CIRCUIT fault sets if solenoid is not in its proper state when monitored by Powertrain Control Module (PCM). Possible causes are open or shorted solenoid, open or shorted control circuit, failed PCM, and open ignition 12-volt feed to solenoid. Go to next step.
3. Inspect wiring and connectors. Repair as required. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If wiring and connectors are okay, read faults using DRB-II. Ensure actuator test is still running.
4. Wiggle wiring harness from solenoid to PCM. If EVAP PURGE SOLENOID CIRCUIT fault returns, repair wiring harness where wiggling caused problem to appear. Perform TEST VER-2.
5. If EVAP PURGE SOLENOID CIRCUIT fault does not return when wiring harness is wiggled, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Test is complete. Perform TEST VER-2.
6. If DRB-II displayed EVAP PURGE SOLENOID CIRCUIT in step 1), turn ignition off. Disconnect EVAP purge solenoid connector. Turn ignition on. Using DRB-II in voltmeter mode, check voltage of EVAP purge solenoid connector, ignition 12-volt feed circuit (Dark Blue wire).
7. If voltage is less than 10 volts, repair open in Dark Blue wire. Perform TEST VER-2. If more than 10 volts, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Go to next step.
8. Using an external ohmmeter, check resistance of EVAP purge solenoid control circuit (Pink/Black wire) between PCM connector terminal No. 52 and EVAP purge solenoid connector. If resistance is more than 5 ohms, repair open in Pink/Black wire. Perform TEST VER-2.
9. If resistance is less than 5 ohms, place DRB-II in ohmmeter mode. Using DRB-II, check resistance of PCM connector terminal No. 52, EVAP purge solenoid control circuit (Pink/Black wire).
10. If resistance is less than 5 ohms, repair short to ground in Pink/Black wire. If resistance is more than 5 ohms, reconnect EVAP purge solenoid connector. Turn ignition on.
11. Using DRB-II in voltmeter mode, check voltage of PCM connector terminal No. 52, EVAP purge solenoid control circuit (Pink/Black wire). If voltage is less than 10 volts, replace EVAP purge solenoid. Perform TEST VER-2. If voltage is more than 10 volts, replace PCM. Perform TEST VER-2.

TEST FC-27A - TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT (DTC 37)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, actuate Torque Converter Clutch (TCC) solenoid.Wait 10 seconds. Using DRB-II, read faults. If TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT fault does not return, go to next step. If TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT fault returns, go to step 4).
2. While actuator test is still running, wiggle wiring from TCC solenoid connector to PCM. Using DRB-II, read faults. If TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT fault returns, repair wiring harness where wiggling caused fault message to reset. Perform TEST VER-2.
3. If TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT fault does not return, see «INACTIVE FAULT CONDITION»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__inactive-fault-condition) . Test is complete. Perform TEST VER-2.
4. If TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT fault returned in step 1), disconnect TCC solenoid connector. Using DRB-II in voltmeter mode, check voltage of TCC solenoid connector, ignition feed circuit (Dark Blue wire).
5. If voltage is less than 10 volts, repair Dark Blue wire. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If more than 10 volts, turn ignition off. Disconnect PCM connector. Using DRB-II in ohmmeter mode, check resistance of PCM connector terminal No. 54, TCC solenoid control circuit (Orange/Black wire).
6. If resistance is less than 10 ohms, repair short to ground in Orange/Black wire. Perform TEST VER-2. If more than 10 ohms, go to next step.
7. Using an external ohmmeter, check resistance of TCC solenoid control circuit (Orange/Black wire) between PCM connector terminal No. 54 and TCC solenoid connector.
8. If resistance is more than 10 ohms, repair open in Orange/Black wire. Perform TEST VER-2. If it is less than 10 ohms, reconnect TCC solenoid connector. Turn ignition on.
9. Using DRB-II in voltmeter mode, check voltage of PCM connector terminal No. 54, TCC solenoid control circuit (Orange/Black wire). If voltage is more than 10 volts, replace PCM. Perform TEST VER-2. If resistance is less than 10 volts, replace TCC solenoid. Perform TEST VER-2.

TEST FC-28A - NO ASD RELAY VOLT SENSE AT PCM (DTC 42)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages. Attempt to start engine. If engine will not start, crank engine for at least 5 seconds. If engine does not start, disconnect ASD relay. Go to next step. If engine starts, wiggle wiring harness from ASD relay to Powertrain Control Module (PCM) in attempt to recreate original fault condition. Go to next step.
2. Using DRB-II, read fault messages. If DRB-II displays NO ASD RELAY VOLT SENSE AT PCM, repair wiring harness as necessary. Perform TEST VER-2. If DRB-II does not display NO ASD RELAY VOLT SENSE AT PCM, go to next step.
3. At this time, condition required to set fault is not present. NO ASD RELAY VOLT SENSE AT PCM fault sets if there is no ASD voltage sensed when Auto Shutdown (ASD) relay is energized. Possible causes are open ASD relay output circuit, open ASD relay control circuit, failed ASD relay and fuel pump relay, and open ASD relay battery feed circuit. Go to next step.
4. Using DRB-II in voltmeter mode, check voltage on ASD relay connector terminal "B", battery feed circuit (Red/White wire). If voltage is less than 12 volts, repair open in Red/White wire. Perform TEST VER-2. If voltage is more than 12 volts, turn ignition off.
5. Disconnect PCM connector. Using DRB-II in ohmmeter mode, check resistance of output circuit (Dark Green/Orange wire) between ASD relay connector and PCM connector terminal No. 57. If resistance is more than 5 ohms, repair open in Dark Green/Orange wire. Perform TEST VER-2. If it is less than 5 ohms, reconnect PCM connector.
6. Install a known good ASD relay. Attempt to start engine. If engine starts, replace original ASD relay. Perform TEST VER-2. If engine does not start, replace PCM. Perform TEST VER-2.

TEST FC-29A - AUTO SHUTDOWN RELAY CONTROL CIRCUIT (DTC 42)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages. Using DRB-II, actuate Auto Shutdown (ASD) relay. If ASD relay is clicking, go to next step. If ASD relay is not clicking, go to step 5).
2. At this time, condition required to set fault is not present. AUTO SHUTDOWN RELAY CONTROL CIRCUIT fault sets if ASD relay and fuel pump relay control circuit are not in proper state when monitored by Powertrain Control Module (PCM) during cranking. Possible causes are open or short in ASD relay and fuel pump relay control circuits, open or short in ASD relay ignition feed circuit and failed driver in PCM. Go to next step.
3. Inspect all related wiring and connectors and repair as necessary. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If no problems are found with wiring and connectors, go to next step.
4. While still actuating ASD relay, wiggle wiring harness from ASD relay to PCM. Stop actuation of ASD relay. Using DRB-II, read fault messages. If AUTO SHUTDOWN RELAY CONTROL CIRCUIT fault returned, repair wiring harness as necessary. Perform TEST VER-2. If AUTO SHUTDOWN RELAY CONTROL CIRCUIT fault does not return, system is now functioning properly. Perform TEST VER-2.
5. If ASD relay was not clicking in step 1), remove ASD relay. Install a known good ASD relay. If known good ASD relay is clicking, replace original ASD relay. Perform TEST VER-2. If known good ASD relay is not clicking, remove known good ASD relay.
6. DRB-II should still be actuating ASD relay. Using DRB-II in voltmeter mode, check voltage on ASD relay connector, ignition feed circuit (Dark Blue wire). If voltage is less than 10 volts, repair open in Dark Blue wire. Perform TEST VER-2. If voltage is more than 10 volts, turn ignition off.
7. Disconnect PCM connector. Using DRB-II in ohmmeter mode, check resistance of ASD relay connector, control circuit (Dark Blue/Yellow wire). If resistance is less than 5 ohms, repair short to ground in Dark Blue/Yellow wire. Perform TEST VER-2.
8. If resistance is more than 5 ohms, check resistance of control circuit (Dark Blue/Yellow wire) between ASD relay connector and PCM connector terminal No. 51 using external ohmmeter. If resistance is more than 5 ohms, repair open in Dark Blue/Yellow wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-30A - A/C CLUTCH RELAY CIRCUIT (DTC 33)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages and actuate A/C clutch relay. If A/C clutch relay is clicking, go to next step. If A/C clutch relay is not clicking, go to «TEST FC-30B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-fc-30b-ac-clutch-relay) .
2. At this time, condition required to set fault is not present. A/C CLUTCH RELAY CIRCUIT fault sets if A/C clutch relay control circuit is not in its proper state when monitored by Powertrain Control Module (PCM).
3. Possible causes are open or short in A/C clutch relay coil windings, open or short in A/C clutch relay control circuit, open or short in A/C clutch relay ignition feed circuit, and failed driver in PCM. Go to next step.
4. Inspect all related wiring and connectors. Repair as necessary. Perform TEST VER-2. If no problems are found with wiring and connectors, go to next step.
5. While still actuating A/C clutch relay, wiggle wiring harness from A/C clutch relay to PCM. Stop actuation of A/C clutch relay. Using DRB-II, read fault messages. If A/C CLUTCH RELAY CIRCUIT fault returns, repair wiring harness as necessary. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If A/C CLUTCH RELAY CIRCUIT fault does not return, system is now functioning properly. Perform TEST VER-2.

TEST FC-30B - A/C CLUTCH RELAY CIRCUIT

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Remove A/C clutch relay. Install a known good A/C clutch relay. If known good A/C clutch relay is clicking, replace original A/C clutch relay. Perform TEST VER-2. If known good A/C clutch relay is not clicking, remove known good A/C clutch relay.
2. Ensure A/C clutch relay actuation test is still running. Using DRB-II in voltmeter mode, check voltage on A/C clutch relay connector, ignition feed circuit (Dark Blue wire). If voltage is less than 10 volts, repair open in Light Green wire. Perform TEST VER-2.
3. If voltage is more than 10 volts, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using DRB-II in ohmmeter mode, check resistance of A/C clutch relay connector, control circuit (Dark Blue/Orange wire). If resistance is less than 5 ohms, repair short to ground in Dark Blue/Orange wire. Perform TEST VER-2.
4. If resistance is more than 5 ohms, check resistance of control circuit (Dark Blue/Orange wire) between A/C clutch relay connector and PCM connector terminal No. 34 using an external ohmmeter. If resistance is more than 5 ohms, repair open in Dark Blue/Orange wire. Perform TEST VER-2. If less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-32A - LOW SPEED FAN CONTROL RELAY CIRCUIT (DTC 35)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages. Using DRB-II, actuate radiator low speed fan relay. If low speed fan relay is clicking, go to next step. If low speed fan relay is not clicking, go to step 6).
2. If low speed fan relay is clicking, condition required to set fault is not present at this time. LOW SPEED FAN CTRL RELAY CIRCUIT fault sets if low speed fan relay control circuit is not in its proper state (high or low) when monitored by Powertrain Control Module (PCM).
3. Possible causes are open or short in low speed fan relay coil windings, open or short in low speed fan relay control circuit, open or short in low speed fan relay ignition feed circuit, and failed driver in PCM.
4. Inspect all related wiring and connectors and repair as necessary. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If no problems are found with wiring and connectors, go to next step.
5. While still actuating low speed fan relay, wiggle wiring harness from low speed fan relay to PCM. Stop actuation of low speed fan relay. Using DRB-II, read fault messages. If LOW SPEED FAN CTRL RELAY CIRCUIT fault returns, repair wiring harness as necessary. Perform TEST VER-2. If LOW SPEED FAN CTRL RELAY CIRCUIT fault does not return, system is now functioning properly. Perform TEST VER-2.
6. If low speed fan relay did not click in step 1), remove low speed fan relay. Install a known good low speed fan relay. If known good low speed fan relay is clicking, replace original low speed fan relay. Perform TEST VER-2. If known good low speed fan relay is not clicking, remove known good low speed fan relay.
7. Ensure low speed fan relay actuation test is still running. Using DRB-II in voltmeter mode, check voltage on low speed fan relay connector, ignition feed circuit (Dark Blue wire). If voltage is less than 10 volts, repair open in Dark Blue wire. Perform TEST VER-2.
8. If voltage is more than 10 volts, turn ignition off. Disconnect PCM connector. Using DRB-II in ohmmeter mode, check resistance of low speed fan relay connector, control circuit (Dark Blue/Pink wire). If resistance is less than 5 ohms, repair short to ground in Dark Blue/Pink wire. Perform TEST VER-2.
9. If resistance is more than 5 ohms, check resistance of control circuit (Dark Blue/Pink wire) between low speed fan relay connector and PCM connector terminal No. 31 using an external ohmmeter. If resistance is more than 5 ohms, repair open in Dark Blue/Pink wire. Perform TEST VER-2. If less than 5 ohms, replace PCM. Perform TEST VER-2.

TEST FC-33A - HIGH SPEED FAN CONTROL RELAY CIRCUIT (DTC 35)

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, erase fault messages and actuate radiator high speed fan relay. If high speed fan relay is clicking, go to next step. If high speed fan relay is not clicking, go to step 6).
2. If high speed fan relay is clicking, condition required to set fault is not present at this time. HIGH SPEED FAN CTRL RELAY CIRCUIT fault sets if high speed fan relay control circuit is not in its proper state (high or low) when monitored by Powertrain Control Module (PCM).
3. Possible causes are open or short in high speed fan relay coil windings, open or short in high speed fan relay control circuit, open or short in high speed fan relay ignition feed circuit, and failed driver in PCM.
4. Inspect all related wiring and connectors and repair as necessary. Perform TEST VER-2. If no problems are found with wiring and connectors, go to next step.
5. While still actuating high speed fan relay, wiggle wiring harness from high speed fan relay to PCM. Stop actuation of high speed fan relay. Using DRB-II, read fault messages. If HIGH SPEED FAN CTRL RELAY CIRCUIT fault returns, repair wiring harness as necessary. Perform TEST VER-2. If HIGH SPEED FAN CTRL RELAY CIRCUIT fault does not return, system is now functioning properly. Perform TEST VER-2.
6. If high speed fan relay did not click in step 1), remove high speed fan relay. Install a known good high speed fan relay. If known good high speed fan relay is clicking, replace original high speed fan relay. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If known good high speed fan relay is not clicking, remove known good high speed fan relay.
7. Ensure high speed fan relay actuation test is still running. Using DRB-II in voltmeter mode, check voltage on high speed fan relay connector, ignition feed circuit (Dark Blue wire). If voltage is less than 10 volts, repair open in Dark Blue wire. Perform TEST VER-2.
8. If voltage is more than 10 volts, turn ignition off. Disconnect PCM connector. Using DRB-II in ohmmeter mode, check resistance of high speed fan relay connector, control circuit (Yellow wire). If less than 5 ohms, repair short to ground in Yellow wire. Perform TEST VER-2.
9. If more than 5 ohms, check resistance of control circuit (Yellow wire) between high speed fan relay connector and PCM connector terminal No. 55 using an external ohmmeter. If resistance is more than 5 ohms, repair open in Yellow wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.

No Fault Complete Test

Check TECHNICAL SERVICE BULLETINS (TSBs) for any pertinent information. If a TSB exists, perform corrective action. If TSB does not exist or driveability problem still exists, perform tests NF-2A through NF-14A in sequence until problem is found. See NO FAULT CODE TEST MENU table.

NO FAULT CODE TEST MENU

No Fault Quick Individual Test

If it is suspected that any item listed in NO FAULT CODE TEST MENU table is cause of a vehicle's driveability problem, perform associated tests individually. Return to NO FAULT CODE TEST MENU table if driveability problem still exists or perform NO FAULT COMPLETE TEST.

No Fault 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 TEST FC-1A is reviewed before attempting to diagnose a symptom.

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

NO FAULT QUICK SYMPTOM TEST MENU

TEST NF-2A - CHECKING SECONDARY IGNITION & TIMING

1. Turn engine off. Connect engine analyzer to engine. Start engine, and let it idle. If engine will not idle, maintain engine speed for reading scope pattern. Set scope to read display or parade pattern. Follow equipment manufacturer's procedure for pattern analysis.
2. If secondary ignition pattern is not okay, repair indicated component in secondary ignition system. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If secondary ignition pattern is okay, disconnect any spark plug wire. Observe secondary kilovolt line.
3. If open circuit secondary voltage is not at least 25 kilovolts, replace electronic ignition coil. Perform TEST VER-2. If open circuit secondary voltage is at least 25 kilovolts, reinstall spark plug wire.
4. Ensure engine temperature is more than 180°F (82°C) before proceeding. Disconnect Engine Coolant Temperature (ECT) sensor connector. When ECT sensor is disconnected, ECT sensor fault will set and warning light will come on. Connect a timing light to engine.
5. Check ignition timing. If ignition timing is not within 2 degrees of specification, adjust as necessary. Perform TEST VER-2. If ignition timing is within 2 degrees of specification, reconnect ECT sensor.
6. Using DRB-II, read spark advance. Increase engine speed to 2000 RPM. If spark advance does not change with increase in RPM, replace Powertrain Control Module (PCM). Perform TEST VER-2. If spark advance changes with increase in RPM, erase ECT fault using DRB-II. ECT sensor and ignition timing are operating properly. Test is complete.

TEST NF-3A - CHECKING FUEL PRESSURE

1. Release fuel pressure. Connect fuel pressure gauge to fuel supply line. Turn ignition on. Using DRB-II, actuate fuel system. If fuel pressure is 43-53 psi (3.0-3.7 kg/cm 2 ), fuel pressure is normal. Test is complete. If fuel pressure is not 43-53 psi (3.0-3.7 kg/cm 2 ), record fuel pressure reading. If pressure is more than 53 psi (3.7 kg/cm 2 ), go to «TEST NF-3B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-nf-3b-checking-fuel-pressure) .
2. If pressure is less than 43 psi (3.0 kg/cm 2 ), stop fuel system actuation. Turn ignition off. Inspect fuel lines for kinked or restricted lines. Repair fuel lines as necessary. Perform TEST VER-2.
3. If no kinked or restricted lines exist, release fuel pressure. Remove fuel pressure gauge. Install fuel pressure gauge between fuel tank and fuel filter. Turn ignition on. Using DRB-II, actuate fuel system. If fuel pressure is at least 5 psi (0.4 kg/cm 2 ) more than previously recorded pressure, replace fuel filter. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . CAUTION: DO NOT allow fuel pressure to exceed 60 psi (4.2 kg/cm 2 ) when squeezing fuel return hose.
4. If fuel pressure is not at least 5 psi (0.4 kg/cm 2 ) more than previous reading, gently squeeze fuel return hose while observing fuel pressure gauge, ensuring fuel pressure does not exceed 60 psi (4.2 kg/cm 2 ). If fuel pressure increases, replace fuel pressure regulator. Perform TEST VER-2. If fuel pressure does not increase, replace fuel pump and sock assembly. Perform TEST VER-2.

TEST NF-3B - CHECKING FUEL PRESSURE

1. Using DRB-II, stop fuel system actuation. Release fuel pressure. Ensure fuel tank is at least 1/2 full before performing following test. Install fuel pressure gauge and adapter between fuel tank and filter at rear of vehicle.
2. Remove fuel return line from fuel pump at fuel tank. Connect Fuel Pressure Test Adapter (6541) to fuel return line. Place other end of adapter hose into an approved 2-gallon gasoline can. Turn ignition on.
3. Using DRB-II, actuate fuel system. Observe fuel pressure gauge. If fuel pressure is 43-53 psi (3.0-3.7 kg/cm 2 ), repair fuel return line for a restriction at fuel tank. Perform TEST VER-2.
4. If fuel pressure is 43-53 psi (3.0-3.7 kg/cm 2 ), repair fuel return line for a restriction to fuel tank. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If pressure is not 43-53 psi (3.0-3.7 kg/cm 2 ), replace fuel pressure regulator. Perform TEST VER-2.

TEST NF-4A - CHECKING COOLANT SENSOR CALIBRATION & RADIATOR

FAN OPERATION

1. Start engine. Using DRB-II, read Engine Coolant Temperature (ECT) sensor value. If ECT sensor temperature is more than 180°F (82°C), stop engine. Allow engine coolant to cool to 150°F (66°C). Start engine. Allow engine to reach normal operating temperature of 180°F (82°C). If ECT sensor value does not increase smoothly, replace ECT sensor. Perform TEST VER-2. If ECT sensor value increases smoothly, go to next step.
2. If ECT sensor value does not reach 180°F (82°C) or more, replace ECT sensor. Perform TEST VER-2. If ECT sensor value reached 180°F (82°C) or more, run engine until radiator fan operates or ECT sensor value reaches 220°F (104°C). If cooling fan does not operate, repair cooling system as necessary. Perform TEST VER-2. If cooling fan operates, system is functioning properly. Test is complete.

TEST NF-5A - CHECKING TPS CALIBRATION

1. Turn ignition on (engine off). Using DRB-II, read Throttle Position Sensor (TPS) voltage. Ensure throttle is fully closed and against throttle stop.
2. If voltage is not one volt or less with throttle closed, replace TPS. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If voltage is one volt or less with throttle closed, watch voltage while slowly opening throttle wide open. If voltage change is not smooth, replace TPS. Perform TEST VER-2. If voltage change is smooth, go to next step.
3. If maximum voltage is not at least 3.6 volts at wide open throttle, replace TPS. Perform TEST VER-2. If maximum voltage is at least 3.6 volts at wide open throttle, TPS is functioning properly. Test is complete.

TEST NF-6A - CHECKING MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR

CALIBRATION

1. Turn engine off. Install vacuum "T" in MAP sensor vacuum hose. Install vacuum gauge. Start engine, and let it idle. Using DRB-II, read vacuum reading. If reading is within one in. Hg of vacuum gauge reading, MAP sensor is functioning properly. Test is complete. If reading is not within one in. Hg of vacuum gauge reading, turn engine off.
2. Disconnect vacuum gauge from MAP sensor vacuum hose. Connect an auxiliary vacuum pump to MAP sensor. Apply 5 in. Hg to MAP sensor. Using DRB-II, read and record MAP sensor voltage. Increase vacuum to 20 in. Hg. Read and record MAP sensor voltage. Subtract voltage recorded at 20 in. Hg from voltage recorded at 5 in. Hg.
3. If difference is 2.3-2.9 volts, repair restriction in vacuum hose to MAP sensor. Perform TEST VER-2. If voltage difference is not 2.3-2.9 volts, replace MAP sensor. Perform TEST VER-2.

TEST NF-7A - CHECKING OXYGEN (O2) SENSOR SWITCHING

1. Allow engine to reach normal operating temperature. Using DRB-II, read O2 sensor state. If O2 sensor state is switching, system is functioning okay. Test is complete. If O2 sensor state is not switching, check if O2 sensor is locked on lean. If O2 sensor is locked on lean, go to TEST NF-7B. If O2 sensor is not locked on lean, turn engine off.
2. Release fuel pressure. Install fuel pressure gauge in fuel supply line. Turn ignition on. Using DRB-II, actuate fuel system. Allow fuel pressure gauge to stabilize to normal fuel pressure. Stop fuel system actuation. Monitor fuel pressure gauge for one minute.
3. If fuel pressure gauge reading drops more than 10 psi (0.7 kg/cm 2 ), replace leaking injectors or "O" rings. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . 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 as necessary. Perform TEST VER-2. If no restrictions are present, go to «TEST NF-14A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-nf-14a-no-fault-code) .

TEST NF-7B - CHECKING OXYGEN (O2) SENSOR SWITCHING

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Allow engine to idle. Inspect engine for vacuum leaks. Repair vacuum leaks as necessary. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If no vacuum leaks exist, read O2 sensor signal voltage using DRB-II.
2. If voltage is more than 0.1 volt, go to step 4). If voltage is less than 0.1 volt, turn ignition off. Disconnect O2 sensor connector. Disconnect Powertrain Control Module (PCM) connector. Using DRB-II in ohmmeter mode, check resistance of O2 sensor connector, signal circuit (Black/Dark Green wire).
3. If resistance is less than 10 ohms, repair short to ground in Black/Dark Green wire. Perform TEST VER-2. If resistance is more than 10 ohms, replace O2 sensor. Perform TEST VER-2.
4. If voltage was more than 0.1 volt in step 2), turn engine off. Turn ignition on. Using DRB-II, reset adaptive fuel memory. Start engine. Allow engine to reach normal operating temperature.
5. Using DRB-II, read O2 sensor state. If O2 sensor state is switching, repair is complete. Perform TEST VER-2. If O2 sensor state is not switching, go to «TEST NF-14A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-nf-14a-no-fault-code) .

TEST NF-8A - CHECKING IDLE AIR CONTROL MOTOR

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, set engine speed to 1100 RPM. If engine speed sets at 1050-1150 RPM, idle speed motor is operating properly. Test is complete. If engine speed does not set at 1050-1150 RPM, return engine to normal idle speed. Disconnect idle air control motor connector.
2. Using DRB-II in voltmeter mode, check voltage on idle air control motor connector, driver No. 1 circuit (Brown/White wire) while momentarily opening and closing throttle. If voltage is less than one volt, go to «TEST NF-8B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-nf-8b-checking-idle-air) . If voltage is more than one volt, go to next step.
3. Using DRB-II, check voltage on idle air control motor connector, driver No. 2 circuit (Yellow/Black wire) while momentarily opening and closing throttle. If voltage is less than one volt, go to TEST NF-8B. If voltage is more than one volt, go to next step.
4. Using DRB-II, check voltage on idle air control motor connector, driver No. 3 circuit (Gray/Red wire) while momentarily opening and closing throttle. If voltage is less than one volt, go to «TEST NF-8B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-nf-8b-checking-idle-air) . If voltage is more than one volt, go to next step.
5. Using DRB-II, check voltage on idle air control motor connector, driver No. 4 circuit (Violet/Black wire) while momentarily opening and closing throttle. If voltage is less than one volt, go to TEST NF-8B. If voltage is more than one volt, go to next step.
6. Check engine for vacuum leaks. Repair as required. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) . If no vacuum leaks are observed, replace idle air control motor. Perform TEST VER-2.

TEST NF-8B - CHECKING IDLE AIR CONTROL MOTOR

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

Turn engine off. Disconnect Powertrain Control Module (PCM) connector. Using an external ohmmeter, check resistance on each wire between Idle Air Control (IAC) motor connector and PCM connector. See PCM TERMINAL IDENTIFICATION table. If resistance for any wire is more than 10 ohms, repair open on that wire. Perform TEST VER-2. If resistance for all wires is less than 10 ohms, replace PCM. Perform TEST VER-2.

PCM TERMINAL IDENTIFICATION

TEST NF-9A - CHECKING SOLENOID OPERATIONS

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, actuate purge solenoid. While touching top of purge solenoid, feel for operation. If purge solenoid does not operate, replace purge solenoid. Perform TEST VER-2.
2. If purge solenoid operates and vehicle is not equipped with an EGR valve, purge solenoid is operating normally. Test is complete. If purge solenoid operates and vehicle is equipped with an EGR valve, actuate EGR solenoid.
3. While touching top of EGR solenoid, feel for operation. If EGR solenoid does not operate, replace solenoid. Perform TEST VER-2. If EGR solenoid operates, test is complete.

TEST NF-10A - CHECKING PARK/NEUTRAL SWITCH

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, read park/neutral switch input state. While watching DRB-II display, move gear selector in and out of Park and Reverse positions. If display shows P/N and D/R, system is functioning correctly. Test is complete. If display does not show P/N and D/R, go to next step.
2. Turn ignition off. Place gear selector in Park position. Disconnect Powertrain Control Module (PCM) connector. Using DRB-II in ohmmeter mode, check resistance on PCM connector terminal No. 30, park/neutral switch sense circuit (Brown/Yellow wire). Observe DRB-II display while moving gear selector in and out of Park and Reverse positions.
3. If display switches from less than 5 ohms to more than 5 ohms, replace PCM. Perform TEST VER-2. If display does not switch from less than to more than 5 ohms, check if display always stays less than 5 ohms. If display does not always stay less than 5 ohms, go to next step. If display always stays less than 5 ohms, repair short to ground in Brown/Yellow wire. Perform TEST VER-2.
4. Disconnect park/neutral switch connector. Using an external ohmmeter, check resistance of sense circuit (Brown/Yellow wire) between park/neutral switch connector and PCM connector terminal No. 30. If resistance is less than 10 ohms, replace park/neutral switch. Perform TEST VER-2. If resistance is more than 10 ohms, repair open in Brown/Yellow. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) .

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

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using DRB-II in ohmmeter mode, check resistance of PCM connector terminal No. 5, signal ground circuit (Black/White wire). If resistance is more than 5 ohms, repair open in Black/White wire. Perform TEST VER-2. If resistance is less than 5 ohms, go to next step.
2. Using DRB-II, check resistance of PCM connector terminal No. 11, power ground circuit (Black/Tan wire). If resistance is more than 5 ohms, repair open in Black/Tan wire. Perform TEST VER-2. If resistance is less than 5 ohms, go to next step.
3. Using DRB-II, check resistance of PCM connector terminal No. 12, power ground circuit (Black/Tan wire). If resistance is more than 5 ohms, repair open in Black/Tan wire. Perform TEST VER-2. If resistance is less than 5 ohms, go to next step.
4. Turn ignition on. Using DRB-II in voltmeter mode, check voltage on PCM connector terminal No. 9, ignition 12-volt feed circuit (Dark Blue wire). If voltage is less than 10 volts, repair open in Dark Blue wire. Perform TEST VER-2. If voltage is more than 10 volts, turn ignition off. Reconnect PCM connector. PCM grounds and power circuits are okay. Test is complete.

TEST NF-12A - CHECKING ENGINE VACUUM

Connect a vacuum gauge to engine. Start engine, and let it idle. Normal vacuum reading will vary depending on altitude. Observe vacuum gauge at idle. If vacuum gauge reading is not steady 13-22 in. Hg, perform TEST NF-14A. If vacuum gauge reading is steady 13-22 in. Hg, engine vacuum is normal. Test is complete. Perform TEST VER-2.

TEST NF-13A - CHECKING MINIMUM IDLE AIRFLOW

1. Turn ignition off. Disconnect PCV valve hose from PCV valve. Disconnect idle purge hose from engine vacuum harness "T". Install Vacuum Fitting (6457) to intake manifold idle purge hose. Start engine. Allow engine to reach normal operating temperature.
2. If vehicle has less than 1000 miles on odometer, go to next step. If vehicle has more than 1000 miles on odometer, actuate minimum airflow using DRB-II. Engine speed should be 625-950 RPM. If engine speed is as specified, minimum airflow is normal. Test is complete. If engine speed is not as specified, replace throttle body. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) .
3. Using DRB-II, actuate minimum airflow. Engine speed should be750-950 RPM. If engine speed is within specification, minimum airflow is normal. Test is complete. If engine speed is not within specification, replace throttle body. Perform TEST VER-2.

TEST NF-14A - NO FAULT CODE MECHANICAL TEST

Note. If coming to this test from O2 sensor test and rich or lean condition is not corrected after checking items listed below, replace Powertrain Control Module (PCM).

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

1. Check if any TECHNICAL SERVICE BULLETINS (TSBs) apply to vehicle.
2. Check engine compression.
3. Check for exhaust system restriction.
4. Check camshaft and crankshaft sprockets.
5. Check valve timing.
6. Check torque converter stall speed.
7. Check engine vacuum. It must be at least 13 in. Hg in Neutral.
8. Check for fuel contamination.
9. Ensure PCV system is functioning properly.
10. Ensure injector control circuit is connected to correct fuel injector and injector is not plugged or restricted.
11. Check power booster for internal vacuum leak.

TEST NS-1A - QUALIFYING NO-START CONDITION

1. Turn ignition off. Disconnect any spark plug cable at spark plug. Insert an insulated screwdriver in spark plug cable terminal. Hold screwdriver within 1/4" of ground. NOTE: When checking for spark, consider one or 2 sparks as a no-spark condition.
2. While cranking engine for 10 seconds, watch for spark. If a good spark occurs, go to «TEST NS-2A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-2a-inspecting-fuel-system) . If a good spark does not occur, reconnect spark plug cable. Disconnect another spark plug cable at spark plug, and repeat test.
3. If a good spark occurs, replace spark plug cable that was initially used to test for spark. If a good spark does not occur, disconnect ignition coil wire. Hold coil wire within 1/4" of ground. While cranking engine for 10 seconds, watch for spark.
4. If good spark occurs, repair secondary ignition system as necessary. Perform TEST VER-1. If a good spark does not occur, turn ignition off. Remove ignition coil secondary cable. Using an external ohmmeter, check resistance of ignition coil secondary cable.
5. If resistance is more than 15,000 ohms, replace ignition coil secondary cable. Perform TEST VER-1. If less than 15,000 ohms, remove distributor cap. While watching distributor rotor, crank engine. If rotor does not turn, repair distributor drive system. Perform «TEST VER-1»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-1) .
6. If rotor turns, reinstall distributor cap. Reinstall ignition coil secondary cable. Disconnect ignition coil electrical connector. Inspect all terminals. Repair as required. Perform TEST VER-1. If terminals are okay, turn ignition on. Using DRB-II, actuate Auto Shutdown (ASD) relay.
7. Using DRB-II in voltmeter mode, check voltage on ignition coil connector, output circuit (Dark Green/Orange wire). If voltage is less than 10 volts, repair open in Dark Green/Orange wire. Perform TEST VER-1.
8. If voltage is more than 10 volts, check voltage on ignition coil connector, driver circuit (Gray wire). If voltage is more than 10 volts, replace ignition coil. Perform TEST VER-1. If voltage is less than 10 volts, turn ignition off.
9. Disconnect PCM connector. Using DRB-II in ohmmeter mode, check resistance of PCM connector terminal No. 19, driver circuit (Gray wire). If resistance is less than 5 ohms, repair short to ground in Gray wire. Perform TEST VER-1.
10. If resistance is more than 5 ohms, check resistance of driver circuit (Gray wire) between ignition coil connector and PCM connector terminal No. 19 using external ohmmeter. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-1. If resistance is more than 5 ohms, repair open in Gray wire. Perform TEST VER-1.

TEST NS-2A - INSPECTING FUEL SYSTEM

1. Ensure throttle cables are not holding throttle open. If throttle is held open, repair as required. Perform TEST VER-1. If throttle is not held open, read Throttle Position Sensor (TPS) voltage using DRB-II.
2. If voltage is less than 1.5 volts, go to next step. If voltage is more than 1.5 volts, disconnect TPS connector. Inspect terminals. Repair as required. Perform TEST VER-1. If terminals are okay, replace TPS. Perform «TEST VER-1»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-1) .
3. If vehicle is not equipped with factory vehicle theft alarm, go to next step. If vehicle is equipped with factory vehicle theft alarm, read theft alarm status using DRB-II. If DRB-II displays FUEL ON, go to next step. If DRB-II does not display FUEL ON, see G - BODY TESTS W/CODES article in the ENGINE PERFORMANCE Section.
4. Using DRB-II, actuate fuel system. Listen for fuel pump operation at fuel tank. If fuel pump operation cannot be heard, go to «TEST NS-5A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-5a-inspecting-fuel-pump) . If fuel pump operation can be heard, turn ignition off.
5. Ensure fuel tank is at least 1/4 full. Release fuel pressure. Install a fuel pressure gauge in fuel supply line. Turn ignition on. Using DRB-II, actuate fuel system. Read fuel pressure gauge reading.
6. If pressure is more than 53 psi (3.7 kg/cm 2 ), go to «TEST NS-4B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-4b-correcting-fuel-delivery) . If fuel pressure is less than 53 psi (3.7 kg/cm 2 ), go to next step.
7. If fuel pressure is less than 43 psi (3 kg/cm 2 ), go to «TEST NS-4A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-4a-correcting-fuel-delivery) . If fuel pressure is more than 43 psi (3 kg/cm 2 ), go to next step.
8. If vehicle initially started and stalled repeatedly, go to «TEST NS-7A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-7a-inspecting-idle-air) . If vehicle did not initially start and stall repeatedly, go to TEST NS-3A.

TEST NS-3A - INSPECTING MECHANICAL SYSTEM

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Disconnect Manifold Absolute Pressure (MAP) sensor connector. Turn ignition on. Using DRB-II, check voltage on MAP sensor connector, 5-volt supply circuit (Violet/White wire). If voltage is less than 4.5 volts, repair open circuit in Violet/White wire. Perform TEST VER-1.
2. If voltage is more than 4.5 volts, reconnect MAP sensor connector. Remove all spark plugs. Inspect spark plug tips for wet fuel. If spark plug tips are wet, clean and reinstall spark plugs. If spark plug tips are not wet, reinstall spark plugs.
3. Inspect spark plug cables for correct placement. Reposition wires as required. Perform TEST VER-1. If spark plug cables are okay, disconnect Engine Coolant Temperature (ECT) sensor connector. While cranking engine, check timing using timing light. If ignition timing is not 0-16 degrees BTDC, go to step 5).
4. If ignition timing is 0-16 degrees BTDC, turn ignition off. Check valve timing. Correct valve timing as required. Perform TEST VER-1. If valve timing is okay, check engine compression. Repair as required. Perform «TEST VER-1»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-1) . If engine compression is okay, replace MAP sensor. Perform TEST VER-1.
5. If ignition timing was not 0-16 degrees BTDC in step 3), try to set timing to specification on emissions label. If timing cannot be set to specification, repair distributor misalignment. Perform TEST VER-1. If ignition timing can be set to specification, try to start engine.
6. If engine starts, test is complete. Perform TEST VER-1. If engine does not start, turn ignition off. Check valve timing. Correct valve timing as required. Perform TEST VER-1.
7. If valve timing is okay, check engine compression. Repair as required. Perform TEST VER-1. If compression is okay, replace MAP sensor. Perform TEST VER-1.

TEST NS-4A - CORRECTING FUEL DELIVERY

1. Record fuel pressure gauge reading. Turn ignition off. Release fuel pressure. Remove fuel pressure gauge. Install fuel pressure gauge between fuel tank and fuel filter. Turn ignition on.
2. Using DRB-II, actuate Auto Shutdown (ASD) fuel system. Record fuel pressure gauge reading. Compare fuel pressure gauge reading with previous reading. If fuel pressure gauge reading is at least 10 psi more than previous reading, go to next step. If fuel pressure gauge reading is not at least 10 psi more than previous reading, go to step 4).
3. Turn ignition off. Inspect fuel lines between fuel filter and fuel rail for restriction. Repair as required. Perform «TEST VER-1»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-1) . If no restrictions are observed, replace fuel filter. Perform TEST VER-1. CAUTION: DO NOT allow fuel pressure to exceed 70 psi (4.9 kg/cm 2 ) when squeezing fuel return hose.
4. If fuel pressure gauge reading was not at least 10 psi more than previous reading in step 2), gently squeeze fuel return hose. Read fuel pressure gauge reading. Using DRB-II, stop fuel system actuator test.
5. If pressure is more than 43 psi (3 kg/cm 2 ), replace fuel pressure regulator. Perform TEST VER-1. If pressure is less than 43 psi (3 kg/cm 2 ), replace fuel pump and sock filter. Perform TEST VER-1.

TEST NS-4B - CORRECTING FUEL DELIVERY

1. Ensure fuel tank is at least 1/4 full. Release fuel pressure. Turn ignition off. Disconnect fuel return hose from fuel rail. Connect a 6-foot fuel hose to fuel rail return line. Put other end of 6-foot hose into an approved 2-gallon or more capacity gasoline container.
2. Turn ignition on. Using DRB-II, actuate fuel system. If pressure is less than 53 psi (3.7 kg/cm 2 ), go to next step. If pressure is more than 53 psi (3.7 kg/cm 2 ), replace fuel pressure regulator. Perform «TEST VER-1»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-1) .
3. Stop fuel system actuation. Turn ignition off. Reconnect fuel return hose. Remove fuel return hose from fuel tank. Connect Fuel Pressure Test Adapter (C-6541) to disconnected return hose.
4. Put other end of hose into an approved 2-gallon or more capacity gasoline container. Turn ignition on. Using DRB-II, actuate fuel system. Read fuel pressure gauge. Using DRB-II, stop actuation test.
5. If pressure is less than 53 psi (3.7 kg/cm 2 ), repair restricted fuel pump. Perform TEST VER-1. If pressure is more than 53 psi (3.7 kg/cm 2 ), repair restricted fuel return line between fuel rail and fuel tank. Perform TEST VER-1.

TEST NS-5A - INSPECTING FUEL PUMP

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Using DRB-II, stop actuation test. Using DRB-II, actuate Auto Shutdown (ASD) relay. Touch fuel pump relay. If fuel pump relay does not pulsate when actuated, go to «TEST NS-5B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-5b-inspecting-fuel-pump) . If fuel pump relay pulsates when actuated, turn ignition off.
2. Disconnect fuel pump relay. Using DRB-II in voltmeter mode, check voltage on fuel pump relay connector, battery voltage circuit (Red/White wire). If voltage is less than 10 volts, repair open circuit in Red/White wire. If voltage is more than 10 volts, install known good relay. Try to start engine. If engine starts, replace original relay. Perform TEST VER-2.
3. If engine does not start, disconnect fuel pump harness connector. Ensure fuel pump connector has clean and tight connections. Turn ignition on. Using DRB-II, actuate fuel system. While actuating, check voltage on fuel pump connector, output circuit (Dark Green/Black wire), using DRB-II in voltmeter mode. If voltage is less than 10 volts, repair open in Dark Green/Black wire. Perform TEST VER-1. If voltage is more than 10 volts, stop actuation test.
4. Using DRB-II in ohmmeter mode, check resistance of fuel pump connector, ground circuit (Black wire). If resistance is less than 5 ohms, replace fuel pump. Perform «TEST VER-1»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-1) . If it is more than 5 ohms, repair open in Black wire. Perform TEST VER-1.

TEST NS-5B - INSPECTING FUEL PUMP

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Turn ignition off. Disconnect fuel pump relay. Turn ignition on. Using DRB-II, check voltage on fuel pump relay connector terminal "A", ignition 12-volt supply circuit (Dark Blue wire).
2. If voltage is less than 10 volts, repair open in Dark Blue wire. Perform TEST VER-1. If voltage is more than 10 volts, go to next step.
3. Using an external ohmmeter, check resistance across fuel pump relay terminals. (Scheme 75) If resistance is more than 100 ohms, replace fuel pump relay. Perform TEST VER-1. If resistance is less than 100 ohms, repair open in Dark Blue/Yellow wire. Perform TEST VER-1.

Testing Fuel Pump Relay. Scheme 75

TEST NS-6A - CORRECTING NO RESPONSE CONDITION

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. If vehicle starts, go to TEST NS-6B. If vehicle does not start, turn ignition off. Disconnect Throttle Position Sensor (TPS) connector. Turn ignition on.
2. Using DRB-II in voltmeter mode, check voltage on TPS connector, 5-volt supply circuit (Violet/White wire). If voltage is more than 6 volts, repair open ground circuits at Powertrain Control Module (PCM) connector terminals No. 5 (Black/White wire), No. 11 (Black/Tan wire) and No. 12 (Black/Tan wire). Perform TEST VER-1. If voltage is less than 6 volts, go to next step.
3. If voltage is less than 4.4 volts, go to step 5). If voltage is more than 4.4 volts, reconnect TPS connector. Disconnect Manifold Absolute Pressure (MAP) sensor connector.
4. Using DRB-II, check voltage on MAP sensor connector, 5-volt supply circuit (Violet/White wire). If voltage is more than 4.4 volts, go to «TEST NS-6B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-6b-correcting-no-response) . If less than 4.4 volts, replace TPS. Perform TEST VER-1.
5. If voltage was less than 4.4 volts in step 3), disconnect MAP sensor electrical connector. Using DRB-II, check voltage on TPS connector, 5-volt supply circuit (Violet/White wire). If voltage is more than 4.4 volts, replace MAP sensor. Perform TEST VER-1.
6. If voltage is less than 4.4 volts, turn ignition off. Disconnect PCM connector. Using DRB-II in ohmmeter mode, check resistance of PCM connector terminal No. 6, 5-volt supply circuit (Violet/White wire).
7. If resistance is less than 5 ohms, repair short to ground in Violet/White wire. Perform TEST VER-1. If resistance is more than 5 ohms, turn ignition on. Using DRB-II in voltmeter mode, check voltage on PCM connector terminal No. 9, ignition 12-volt feed circuit (Dark Blue/White wire).
8. If voltage is less than 10 volts, repair open in Dark Blue/White wire between PCM connector and ignition switch. Perform TEST VER-1. If voltage is more than 10 volts, go to next step.
9. Using DRB-II, check voltage on PCM connector terminal No. 3, battery voltage circuit (Red/White wire). If voltage is more than 10 volts, replace PCM. Perform TEST VER-1. If less than 10 volts, go to «TEST NS-6C»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-6c-correcting-no-response) .

TEST NS-6B - CORRECTING NO RESPONSE CONDITION

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. If ignition was not on when NO RESPONSE message was displayed, turn ignition on to get a response. If ignition was on when NO RESPONSE message was displayed, turn ignition off.
2. Disconnect DRB-II from data link connector. Disconnect Powertrain Control Module (PCM) connector. Using an external ohmmeter, check resistance between data link connector, SCI transmit circuit (Pink wire), and ground.
3. If resistance is less than 5 ohms, repair short to ground in Pink wire. Perform TEST VER-1. If it is more than 5 ohms, use an external ohmmeter to check resistance between data link connector, SCI receive circuit (Light Green wire), and ground.
4. If resistance is less than 5 ohms, repair short to ground in Light Green wire. Perform «TEST VER-1»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-1) . If more than 5 ohms, go to next step.
5. Using an external ohmmeter, check resistance of SCI receive circuit (Light Green wire) between data link connector and PCM connector terminal No. 45. If resistance is more than 5 ohms, repair open in Light Green wire. Perform TEST VER-1.
6. If resistance is less than 5 ohms, connect DRB-II to a functional data link connector on another vehicle. Turn ignition on. Using DRB-II, attempt to read fault messages. If DRB-II does not display NO RESPONSE, replace PCM on initial vehicle. Perform TEST VER-1.
7. If DRB-II displays NO RESPONSE, substitute another DRB-II cartridge. Using DRB-II, attempt to read fault messages. If DRB-II does not display NO RESPONSE, replace DRB-II cartridge. If DRB-II displays NO RESPONSE, substitute another DRB-II adapter cable. Using DRB-II, attempt to read fault messages. If DRB-II does not display NO RESPONSE, replace DRB-II adapter cable. If DRB-II displays NO RESPONSE, repair or replace DRB-II.

TEST NS-6C - CORRECTING NO RESPONSE CONDITION

1. Inspect fusible links located in engine compartment near left strut tower. If a fusible link is blown, go to next step. If fusible links are okay, repair open in Red/White wire between PCM connector terminal No. 3 and battery positive. Perform TEST VER-1.
2. Using DRB-II in ohmmeter mode, check resistance of PCM connector terminal No. 3, fused battery voltage circuit (Red/White wire). If resistance is less than 5 ohms, repair short to ground in Red/White wire. Perform TEST VER-1.
3. If resistance is more than 5 ohms, use DRB-II to check resistance of ASD relay connector terminal "D", output circuit (Dark Green/Orange wire). If resistance is more than 5 ohms, go to «TEST NS-6D»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-6d-correcting-no-response) . If resistance is less than 5 ohms, disconnect ignition coil connector. Using DRB-II, check resistance of ASD relay connector terminal "D", output circuit (Dark Green/Orange wire). If resistance is more than 5 ohms, replace ignition coil. Perform «TEST VER-2»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-2) .
4. If resistance is less than 5 ohms, disconnect generator field connector. Using DRB-II, check resistance of ASD relay connector terminal "D", output circuit (Dark Green/Orange wire). If resistance is more than 5 ohms, repair short to ground in generator. Perform TEST VER-1.
5. If resistance is less than 5 ohms, disconnect fuel injector harness connector. Using DRB-II, check resistance of ASD relay connector terminal "D", output circuit (Dark Green/Orange wire). If resistance exceeds 5 ohms, repair short to ground in fuel injector harness. Perform TEST VER-1. If resistance is less than 5 ohms, repair short to ground in Dark Green/Orange wire. Perform TEST VER-1.

TEST NS-6D - CORRECTING NO RESPONSE CONDITION

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Disconnect fuel pump and oxygen sensor connectors. Using DRB-II, check resistance of fuel pump relay connector, output circuit (Dark Green/Black wire). If resistance is less than 5 ohms, repair short to ground in Dark Green/Black wire. Perform «TEST VER-1»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-1) .
2. If resistance is more than 5 ohms, check resistance of oxygen sensor connector, relay output circuit (White wire). If resistance is less than 5 ohms, replace oxygen sensor. Perform TEST VER-1. If resistance is more than 5 ohms, replace fuel pump. Perform TEST VER-1.

TEST NS-7A - INSPECTING IDLE AIR CONTROL MOTOR OPERATION

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Disconnect Idle Air Control (IAC) motor connector. Turn ignition on. Using DRB-II, actuate IAC motor. Using DRB-II in voltmeter mode, check voltage on IAC motor connector, driver No. 3 circuit (Gray/Red wire). If voltage is less than one volt, go to «TEST NS-7B»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-7b-inspecting-idle-air) .
2. If voltage is more than one volt, check voltage on IAC motor connector, driver No. 1 circuit (Brown/White wire). If voltage is less than one volt, go to «TEST NS-7C»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-7c-inspecting-idle-air) . If voltage is more than one volt, check voltage on IAC motor connector, driver No. 4 circuit (Violet/Black wire). If voltage is less than one volt, go to «TEST NS-7D»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-7d-inspecting-idle-air) .
3. If voltage is more than one volt, check voltage on IAC motor connector, driver No. 2 circuit (Yellow/Black wire). If voltage is less than one volt, go to «TEST NS-7E»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-7e-inspecting-idle-air) . If voltage is more than one volt, turn ignition off.
4. Remove IAC motor from throttle body. Reconnect IAC motor connector. Using DRB-II, actuate IAC motor. If IAC motor tip moves in and out, go to «TEST NS-8A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-ns-8a-correcting-start) . If IAC motor tip does not move in and out, replace IAC motor. Perform «TEST VER-1»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-1) .

TEST NS-7B - INSPECTING IDLE AIR CONTROL MOTOR OPERATION

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect all terminals, and repair as required. Perform «TEST VER-1»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-1) . If PCM terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of driver No. 3 circuit (Gray/Red wire) between IAC motor connector and PCM connector terminal No. 39. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-1. If resistance is more than 5 ohms, repair open in Gray/Red wire. Perform TEST VER-1.

TEST NS-7C - INSPECTING IDLE AIR CONTROL MOTOR OPERATION

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect all terminals, and repair as required. Perform TEST VER-1. If PCM terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of driver No. 1 circuit (Brown/White wire) between IAC motor connector and PCM connector terminal No. 40. If resistance is less than 5 ohms, replace PCM. Perform «TEST VER-1»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-1) . If resistance is more than 5 ohms, repair open in Brown/White wire. Perform TEST VER-1.

TEST NS-7D - INSPECTING IDLE AIR CONTROL MOTOR OPERATION

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect all terminals, and repair as required. Perform TEST VER-1. If PCM terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of driver No. 4 circuit (Violet/Black wire) between IAC motor connector and PCM connector terminal No. 59. If resistance is less than 5 ohms, replace PCM. Perform «TEST VER-1»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-1) . If resistance is more than 5 ohms, repair open in Violet/Black wire. Perform TEST VER-1.

TEST NS-7E - INSPECTING IDLE AIR CONTROL MOTOR OPERATION

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect all terminals, and repair as required. Perform TEST VER-1. If PCM terminals are okay, go to next step.
2. Using an external ohmmeter, check resistance of driver No. 2 circuit (Yellow/Black wire) between IAC motor connector and PCM connector terminal No. 60. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-1. If resistance is more than 5 ohms, repair open in Yellow/Black wire. Perform «TEST VER-1»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__verification-procedure-1) .

TEST NS-8A - CORRECTING 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. Check following items as possible causes

1. Check if any TECHNICAL SERVICE BULLETINS (TSBs) apply to vehicle.
2. Check engine compression.
3. Check for exhaust system restriction.
4. Check camshaft and crankshaft sprockets.
5. Check valve timing.
6. Check for fuel contamination.
7. Check secondary ignition system.
8. Ensure PCV system is functioning properly.

VERIFICATION PROCEDURE 1

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. Attempt to start engine.
2. If engine does not start, check if any TECHNICAL SERVICE BULLETINS (TSBs) apply to vehicle and return to «TEST FC-1A»(/plymouth/voyager/ii-1991-1995/remont/testing-diagnostics/#engine-controls-tests-wcodes-30l__test-fc-1a-checking-system-for) , if necessary. If engine starts and Powertrain Control Module (PCM) was changed, repair is complete. If engine starts and PCM was not changed, connect DRB-II to data link connector and erase fault messages. Repair is complete.

VERIFICATION PROCEDURE 2

Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. If another fault was read previously and not corrected, return to TEST FC-1A and follow path specified by other fault. If Powertrain Control Module (PCM) has not been replaced, perform following

1. Connect DRB-II to data link connector, and erase faults.
2. Using DRB-II, reset all values in adaptive memory.
3. Disconnect DRB-II.

To ensure no other fault remains, perform following

1) Turn on A/C and blower motor (if equipped). Drive vehicle at least 5 minutes and attain a speed of at least 40 MPH. Ensure transmission shifts through all gears.

2) Upon completion of road test, turn engine off. Restart engine, and let it idle for at least 2 minutes. Turn engine off. Connect DRB-II to data link connector.

3) Read all fault messages. If repaired fault has reset, repair is not complete. Check all pertinent TECHNICAL SERVICE BULLETINS (TSBs), and return to TEST FC-1A if necessary. If another fault exists, return to TEST FC-1A and follow path specified by other fault. If no other faults exist, repair is now complete.

See also:
• FUEL PRESSURE RELEASE
• VISUAL INSPECTION
• ENTERING ON-BOARD DIAGNOSTICS
• TEST NS-1A
• TEST FC-1A
• TEST NF-1A
• CONNECTOR IDENTIFICATION
• TEST NS-6A
• DTC 11
• DTC 54
• DTC 13
• DTC 14
• DTC 14
• DTC 15
• DTC 21
• DTC 52
• DTC 51
• DTC 21
• DTC 22
• DTC 22
• DTC 24
• DTC 24
• DTC 25
• DTC 27
• DTC 27
• DTC 27
• DTC 27
• DTC 27
• DTC 27
• DTC 62
• DTC 32
• DTC 32
• DTC 31
• DTC 37
• DTC 42
• DTC 42
• DTC 33
• DTC 35
• DTC 35
• INACTIVE FAULT CONDITION
• TEST FC-2B
• TEST VER-2
• TEST FC-7B
• TEST FC-7C
• TEST FC-7D
• TEST FC-17B
• TEST FC-18B
• TEST FC-19B
• TEST FC-20B
• TEST FC-21B
• TEST FC-22B
• TEST FC-30B
• NF-2A
• NF-3A
• NF-4A
• NF-5A
• NF-6A
• NF-7A
• NF-8A
• NF-9A
• NF-10A
• NF-11A
• NF-12A
• NF-13A
• NF-14A
• TEST NF-3B
• TEST NF-8B
• TEST NS-2A
• TEST VER-1
• TEST NS-5A
• TEST NS-4B
• TEST NS-4A
• TEST NS-7A
• TEST NS-5B
• TEST NS-6B
• TEST NS-6C
• TEST NS-6D
• TEST NS-7B
• TEST NS-7C
• TEST NS-7D
• TEST NS-7E
• TEST NS-8A