2000 CHRYSLER VOYAGER check engine

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.
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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
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DRIVEABILITY
P-1599 A/C PRESSURE SENSOR VOLTS TOO LOW ÐContinued
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Symptom:
P-1695 NO CCD MESSAGE FROM BODY CONTROLLER
When Monitored and Set Condition:
P-1695 NO CCD MESSAGE FROM BODY CONTROLLER
When Monitored: Anytime the engine is running.
Set Condition: No CCD messages are received from the BCM for 30 seconds.
POSSIBLE CAUSES
CCD BUS (+) CIRCUIT OPEN
CCD BUS (-) CIRCUIT OPEN
WIRING HARNESS OBSERVABLE DEFECT
BCM9NO RESPONSE9
PCM DEF (NO CCD MSG)
TEST ACTION APPLICABILITY
1 Ignition on with engine not running.
Erase trouble codes.
Start engine and allow to run for 1 minute.
With the DRB, read trouble codes.
Does display show9No CCD messages from Body Control Module9and a start run
counter of zero?All
Ye s®Go To 2
No®Go To 6
2 Ignition off.
Disconnect the PCM Connectors.
Disconnect the BCM Connectors.
Note: Check Connectors - clean/repair as necessary.
Using an ohmmeter, measure the CCD Bus (+) Circuit from the PCM to the BCM.
Is the resistance below 5.0 ohms?All
Ye s®Go To 3
No®Repair the open CCD Bus (+) Ckt between BCM and PCM.
Perform Verification Test VER-2A.
3 Ignition off.
Disconnect the PCM Connectors.
Disconnect the BCM Connectors.
Note: Check Connectors - clean/repair as necessary.
Using an ohmmeter, measure the CCD (-) Circuit for resistance from PCM to the
BCM.
Is the resistance below 5.0 ohms?All
Ye s®Go To 4
No®Repair the open CCD Bus (-) Ckt between BCM and PCM.
Perform Verification Test VER-2A.
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DRIVEABILITY
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Symptom:
CHECKING 5 VOLT SUPPLY CIRCUIT
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.
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
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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.
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DRIVEABILITY
CHECKING 5 VOLT SUPPLY CIRCUIT ÐContinued
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Symptom:
* CHECKING EGR SYSTEM
POSSIBLE CAUSES
VACUUM LINE TO EGR SOLENOID RESTRICTION OR LEAK
VACUUM NIPPLE AT THROTTLE BODY PLUGGED
EGR VALVE ASSEMBLY DEFECTIVE
EGR VALVE ASSEMBLY DOES NOT HOLD VACUUM
EGR VALVE ASSEMBLY TONE CHANGED
EGR VALVE ASSEMBLY VACUUM <= 3 INCHES
PASSAGES BETWEEN EGR VALVE AND INTAKE CLOSED
TEST ACTION APPLICABILITY
1 Ignition Off
Disconnect the Vacuum Supply Hose at the EGR Solenoid.
Connect a vacuum gauge to the disconnected Vacuum Supply Hose.
Start the Engine.
Was the vacuum above 109at idle?All
Ye s®Go To 2
No®Go To 10
2 Ignition Off
Connect Back Pressure Hose to transducer.
Connect a hand pump to the EGR Valve Nipple.
Start the Engine.
Slowly apply vacuum to the EGR Valve, watch for Engine speed to drop.
Did the Engine speed drop?All
Ye s®Go To 3
No®Go To 6
3 Ignition Off
Adjust a shop air source to 20 PSI and connect to Backpressure Tube at base of EGR
Valve.
While opening and closing the throttle, listen for a tone change.
Did the tone change?All
Ye s®Replace the EGR Valve Assembly.
Perform Verification Test VER-2A.
No®Go To 4
4 Ignition Off
Connect a hand pump to the EGR Valve Nipple.
Apply 10 inches of vacuum and hold for 30 seconds.
Did the Vacuum hold for 30 seconds?All
Ye s®Go To 5
No®Replace the EGR Valve Assembly.
Perform Verification Test VER-2A.
228
DRIVEABILITY
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TEST ACTION APPLICABILITY
5 Engine Running
Disconnect the EGR Valve Hose from the EGR Valve.
Connect the vacuum gauge to the disconnected EGR Valve Hose.
While watching the gauge, unplug EGR Solenoid Electrical Connector.
Is the Vacuum over 3 inches at this time?All
Ye s®Test Complete.
No®Replace the EGR Valve Assembly.
Perform Verification Test VER-2A.
6 Ignition Off
Adjust a shop air source to 20 PSI and connect to Backpressure Tube at base of EGR
Valve.
While opening and closing the throttle, listen for a tone change.
Did the tone change?All
Ye s®Replace the EGR Valve Assembly.
Perform Verification Test VER-2A.
No®Go To 7
7 Engine Running
Disconnect the EGR Valve Hose from the EGR Valve.
Connect the vacuum gauge to the disconnected EGR Valve Hose.
While watching the gauge, unplug EGR Solenoid Electrical Connector.
Is the Vacuum over 3 inches at this time?All
Ye s®Go To 8
No®Replace the EGR Valve Assembly.
Perform Verification Test VER-2A.
8 Ignition Off
Remove the EGR Valve Assembly and inspect passages from Valve to Intake
Manifold.
Were passages open between EGR Valve and intake?All
Ye s®Go To 9
No®Repair the EGR Passages as necessary.
Perform Verification Test VER-2A.
9 Ignition Off
If there are no potential causes remaining, the EGR Valve Assembly is assumed to be
defective.
View repair options.All
Repair
Replace the EGR Valve Assembly.
Perform Verification Test VER-2A.
10 Ignition Off
Disconnect the EGR Vacuum Supply Hose at the Intake Manifold.
Connect a vacuum gauge to the Intake Manifold Nipple.
Read the vacuum gauge at idle.
Was the vacuum above 109at idle?All
Ye s®Repair the restriction or leak in the vacuum line to EGR Solenoid.
Perform Verification Test VER-2A.
No®Go To 11
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* CHECKING EGR SYSTEM ÐContinued
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Symptom:
* CHECKING ENGINE VACUUM
TEST ACTION APPLICABILITY
1 Ignition Off
Connect a Vacuum Gauge to a Vacuum Source on the Engine.
Start the Engine and allow it to idle.
Note: The normal vacuum reading will vary according to the altitude.
While monitoring the vacuum gauge, snap the throttle open a few times. Refer to
vacuum gauge specifications in support material.
Observe the Vacuum Gauge reading at idle.
Is the Vacuum Gauge reading between 13 inches and 22 inches steady?All
Ye s®Test Complete.
No®Refer to symptom * CHECKING THE ENGINE MECHANICAL
SYSTEMS in the DRIVEABILITY category.
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DRIVEABILITY
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