2000 CHRYSLER VOYAGER engine

TEST ACTION APPLICABILITY
6 Ignition Off
Disconnect the LDP Connector.
Note: Check connectors - Clean/repair as necessary.
Disconnect the PCM.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the resistance of the LDP Pressure Switch Sense
Circuit from the PCM Connector to a good ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the LDP Pressure Switch Sense Circuit for a short to
ground.
Perform Powertrain Verification Test VER-5A.
No®Go To 7
7 Ignition Off
Disconnect the LDP Connector.
Note: Check connectors - Clean/repair as necessary.
Disconnect the PCM.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the resistance of the LDP Pressure Switch Sense
Circuit from the PCM Connector to the LDP Connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 8
No®Repair the open LDP Switch Sense Circuit.
Perform Powertrain Verification Test VER-5A.
8 Ignition Off
Disconnect the Engine Vacuum Supply Hose at the LDP.
Disconnect the PCM.
Note: Check connectors - Clean/repair as necessary.
Key on.
With voltmeter connected to LDP switch sense circuit at PCM connector, ground the
LDP solenoid control circuit. Then while applying vacuum to LDP with a hand
vacuum pump, observe voltmeter.
Did the voltage change?All
Ye s®Go To 9
No®Replace the LDP.
Perform Powertrain Verification Test VER-5A.
9 Ignition Off
If there are no potential causes remaining, the PCM is assumed to be defective.
View repair options.All
Repair
Replace the PCM.
Perform Powertrain Verification Test VER-5A.
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DRIVEABILITY
P-1494 LEAK DETECTION PUMP PRESSURE SWITCH ÐContinued
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Symptom:
P-1495 LEAK DETECTION PUMP SOLENOID CIRCUIT
When Monitored and Set Condition:
P-1495 LEAK DETECTION PUMP SOLENOID CIRCUIT
When Monitored: Immediately after a cold start, with ambient temperature between 4
deg C (40 deg F) and 32 deg C (90 deg F) and coolant temperature within ±12 deg C (10 deg
F) of ambient temperature.
Set Condition: The state of the solenoid does not change.
POSSIBLE CAUSES
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
LDP DEFECTIVE
LDP SOLENOID CKT WIRING HARNESS INTERMITTENT DEF
LDP SOLENOID CKT WIRING HARNESS OBSERVABLE DEFECT
LDP SOLENOID CONTROL CIRCUIT OPEN
LDP SOLENOID CONTROL CIRCUIT SHORT TO GROUND
PCM DEFECTIVE
NO POSSIBLE CAUSES REMAINING
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, actuate the LDP Pump Solenoid.
Is it clicking?All
Ye s®Go To 2
No®Go To 5
2 Ignition On, Engine Not Running.
With the DRB, actuate the LDP Solenoid.
While monitoring the LDP Switch state, wiggle Wiring Harness from the LDP
Solenoid to PCM.
Did the LDP Switch state ever change from up to down when wiggled?All
Ye s®Repair as necessary where wiggling caused problem to appear.
Perform Powertrain Verification Test VER-6A.
No®Go To 3
3 Ignition Off
Using the schematic as a guide, inspect the Wiring and Connectors.
Were any problems found?All
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-6A.
No®Go To 4
209
DRIVEABILITY
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Symptom:
P-1496 5 VOLT SUPPLY OUTPUT TOO LOW
When Monitored and Set Condition:
P-1496 5 VOLT SUPPLY OUTPUT TOO LOW
When Monitored: With the ignition on.
Set Condition: The 5-volt supply to the sensors is below 3.5 volts for 4 seconds.
POSSIBLE CAUSES
5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
5-VOLT SUPPLY WIRING HARNESS INTER DEF
A/C PRESSURE SENSOR DEFECTIVE
MAP SENSOR DEFECTIVE
THROTTLE POSITION SENSOR DEFECTIVE
PCM DEF (5 VOLT SUPPLY CIRCUIT)
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
Disconnect the Throttle Position Sensor Connector.
Note: Check connectors - Clean/repair as necessary
With a voltmeter, probe the 5-Volt Supply Ckt at the TP Sensor harness connector.
Note: Reconnect TPS Connector after measurement.
Is the voltage reading below 4.5 volts?All
Ye s®Go To 2
No®Go To 6
2 Ignition On, Engine Not Running.
Disconnect the Throttle Position Sensor Connector.
Disconnect the A/C Pressure Sensor.
Note: Check connectors - Clean/repair as necessary.
With a voltmeter, probe the TP Sensor 5-Volt Supply Circuit to the TP Sensor.
Is the 5-Volt Supply Circuit voltage above 4.0 volts?All
Ye s®Replace the A/C Pressure Sensor.
Perform Powertrain Verificaton Test VER-2A.
No®Go To 3
3 Ignition On, Engine Not Running
Disconnect the Throttle Position Sensor Connector.
Disconnect the MAP Sensor Electrical Connector.
Note: Check connectors - Clean/repair as necessary.
With the voltmeter, probe the TP Sensor 5-Volt Supply Circuit to the TP Sensor.
Is the 5-Volt Supply Circuit voltage above 4.0 volts?All
Ye s®Replace the Map Sensor.
Perform Powertrain Verification Test VER-2A.
No®Go To 4
212
DRIVEABILITY
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TEST ACTION APPLICABILITY
4 Ignition Off
Disconnect the Throttle Position Sensor Connector.
Disconnect the MAP Sensor Electrical Connector.
Disconnect the A/C Sensor Connector.
Disconnect the Powertrain Control Module Connector.
Note: Check connectors - Clean/repair as necessary.
With the ohmmeter, probe the 5-volt supply circuit at the TPS Connector.
Is the resistance below 5.0 ohms?All
Ye s®Repair the 5-volt Supply Circuit for a short to ground.
Perform Powertrain Verification Test VER-2A.
No®Go To 5
5 If there are no potential causes remaining, the Powertrain Control Module is
assumed to be defective.
View repair options.All
Repair
Replace the PCM.
Perform Powertrain Verification Test VER-2A.
6 Ignition On, Engine Not Running
Disconnect the MAP Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
With the voltmeter, probe the 5-Volt Supply Ckt at the MAP Sensor Connector.
Is the voltage reading below 4.5 volts?All
Ye s®Replace the TPS.
Perform Powertrain Verification Test VER-2A.
No®Test Complete.
7 Ignition On, Engine Not Running
Disconnect the MAP Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
With the DRB in voltmeter mode, probe the 5-volt supply circuit voltage at the MAP
Sensor Connector.
Wiggle all connectors and wiring to all sensors (MAP, A/C PRESS, TPS).
While you wiggle the connectors and wiring to all sensors monitor the 5.0 volt supply
circuit voltage.
Was there any voltage change?All
Ye s®Repair the harness or connector that caused the voltage change.
Perform Powertrain Verification Test VER-2A.
No®Test Complete.
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DRIVEABILITY
P-1496 5 VOLT SUPPLY OUTPUT TOO LOW ÐContinued
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Symptom:
P-1598 A/C PRESSURE SENSOR VOLTS TOO HIGH
When Monitored and Set Condition:
P-1598 A/C PRESSURE SENSOR VOLTS TOO HIGH
When Monitored: With the ignition on, the engine running, and the A/C relay energized.
Set Condition: The A/C pressure sensor signal at PCM cavity 42 goes above 4.9 volts.
POSSIBLE CAUSES
AIR CONDITIONING PRESSURE SENSOR GROUND CIRCUIT OPEN
AIR CONDITIONING PRESSURE SENSOR DEFECTIVE
A/C PRESS SENSOR CONN AND WIRING HARN INTER DAMAGE
A/C PRESSURE SENSOR CONNECTOR AND HARNESS OBSERVABLE DEFECT
A/C PRESSURE SENSOR SIGNAL CIRCUIT OPEN
A/C PRESSURE SENSOR SIGNAL SHORT TO VOLTAGE
PCM DEFECTIVE
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, read the A/C Pressure Sensor voltage.
Is the A/C Pressure Sensor voltage above 4.6 volts?All
Ye s®Go To 2
No®Go To 7
2 Ignition Off
Disconnect the A/C Pressure Sensor.
Note: Check connectors - Clean/repair as necessary.
Turn ignition on.
Using a Voltmeter, measure voltage of the A/C Pressure Signal Circuit to ground.
Is the voltage above 6.0 volts?All
Ye s®Repair A/C Pressure Sensor Signal shorted to voltage.
Perform Powertrain Verification Test VER-2A.
No®Go To 3
214
DRIVEABILITY
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TEST ACTION APPLICABILITY
3 Ignition Off
Disconnect the A/C Pressure Sensor.
Note: Check connectors - Clean/repair as necessary.
Connect a Jumper Wire between the A/C Pressure Sensor Signal Circuit and Sensor
Ground Circuit.
Ignition on with engine not running.
With the DRB, read the A/C Pressure Sensor voltage.
Is the voltage below 1.0 volt?All
Ye s®Replace the A/C Pressure Sensor.
Perform Powertrain Verification Test VER-2A.
No®Go To 4
4 Ignition Off
Disconnect the A/C Sensor Electrical Connector.
Note: Check connectors - Clean/repair as necessary.
Connect a Jumper Wire between the A/C Pressure Sensor Signal Circuit and Engine
Ground.
Ignition on, engine not running.
With the the DRB, read the A/C Pressure Sensor voltage.
Is the voltage below 1.0 volt?All
Ye s®Repair the open Sensor Ground Circuit.
Perform Powertrain Verification Test VER-2A.
No®Go To 5
5 Ignition Off.
Disconnect the A/C Pressure Sensor.
Note: Check connectors - Clean/repair as necessary.
Disconnect the PCM.
Using an Ohmmeter, measure the A/C Pressure Sensor Signal Circuit from the PCM
to the Sensor.
Is the resistance below 5.0 ohms?All
Ye s®Go To 6
No®Repair the open A/C Presure Sensor Circuit.
Perform Powertrain Verification Test VER-2A.
6 If there are no potential causes remaining, the PCM is assumed to be defective.
View repair options.All
Repair
Replace the PCM.
Perform Powertrain Verification Test VER-2A.
7 Ignition On, Engine Not Running.
With the DRB, read the A/C Pressure Sensor voltage.
Using the schematic as a guide, wiggle the A/C Pressure Sensor Connector and
Harness.
Monitor the DRB display.
Was there any A/C Pressure Sensor voltage change?All
Ye s®Repair the Harness or Connector that caused the voltage to
change.
Perform Powertrain Verification Test VER-2A.
No®Go To 8
215
DRIVEABILITY
P-1598 A/C PRESSURE SENSOR VOLTS TOO HIGH ÐContinued
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Symptom:
P-1599 A/C PRESSURE SENSOR VOLTS TOO LOW
When Monitored and Set Condition:
P-1599 A/C PRESSURE SENSOR VOLTS TOO LOW
When Monitored: With the ignition switch on, the engine running , and the A/C relay
energized.
Set Condition: The A/C pressure sensor signal voltage at PCM cavity 42 goes below 0.5
volt, or the voltage is below .059 volt.
POSSIBLE CAUSES
A/C PRESSURE SENSOR 5-VOLT SUPPLY CKT OPEN
A/C PRESS SEN CONN AND WIRING HARN OBSERVABLE DEF
A/C PRESSURE SEN SIG CKT SHORTED TO SEN GND CKT
A/C PRESSURE SENSOR CONN AND WIRING HARN INTER DEF
A/C PRESSURE SENSOR SIGNAL CKT SHORTED TO GND
A/C PRESSURE SENSOR DEFECTIVE
PCM DEF (A/C PRESSURE SEN)
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, read the A/C Pressure Sensor voltage.
Is the A/C Pressure Sensor voltage below 0.2 volt?All
Ye s®Go To 2
No®Go To 7
2 Ignition Off
Disconnect the A/C Pressure Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Ignition on with engine not running.
Using a Voltmeter, measure the 5-Volt Supply Circuit.
Is the A/C Pressure Sensor 5-volt Supply Circuit above 4.9 volts?All
Ye s®Go To 3
No®Repair the open 5-Volt Supply Circuit.
Perform Powertrain Verification Test VER-2A.
217
DRIVEABILITY
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TEST ACTION APPLICABILITY
3 Ignition Off
Disconnect the A/C Pressure Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Ignition on with engine not running.
With the DRB , read the A/C Pressure Sensor voltage.
Is the A/C Pressure Sensor voltage above 4.5 volts?All
Ye s®Replace the A/C Pressure Sensor.
Perform Powertrain Verification Test VER-2A.
No®Go To 4
4 Ignition Off
Disconnect the Powertrain Control Module.
Disconnect the A/C Pressure Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter ,test the resistance between the A/C Pressure Sensor Signal
Circuit and Sensor Ground Circuit.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Sensor Signal Circuit shorted to the Sensor Ground
Circuit.
Perform Powertrain Verification Test VER-2A.
No®Go To 5
5 Ignition Off
Disconnect the Powertrain Control Module.
Disconnect the A/C Pressure Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the A/C Pressure Sensor Signal Circuit to ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Sensor Signal Circuit for a short to ground.
Perform Powertrain Verification Test VER-2A.
No®Go To 6
6 Ignition off.
If there are no potential causes remaining, the PCM is assumed to be defective.
View repair options.All
Repair
Replace the Powertrain Control Module.
Perform Powertrain Verification Test VER-2A.
7 Ignition Off
Using the schematic as a guide, inspect the wiring and connectors.
Were any problems found?All
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-2A.
No®Go To 8
218
DRIVEABILITY
P-1599 A/C PRESSURE SENSOR VOLTS TOO LOW ÐContinued
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