2000 CHRYSLER VOYAGER key

Symptom:
P-0645 A/C CLUTCH RELAY CIRCUIT
When Monitored and Set Condition:
P-0645 A/C CLUTCH RELAY CIRCUIT
When Monitored: With the ignition key on and battery voltage greater than 10 volts.
Set Condition: An open or shorted condition is detected in the A/C clutch relay control
circuit.
POSSIBLE CAUSES
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
AIR CONDITIONING CLUTCH RELAY DEFECTIVE
A/C CLUTCH RELAY CIRCUIT WITHOUT INTER DEFECT
A/C CLUTCH RELAY CIRCUIT WITHOUT OBSER DEFECT
A/C CLUTCH RELAY CONTROL CIRCUIT SHORT TO GROUND
AIR CONDITIONING CLUTCH RELAY CONTROL CIRCUIT OPEN
PCM DEF (A/C CLUTCH RELAY)
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
Actuate the Air Conditioning Clutch Relay.
Is the Air Conditioning Clutch Relay clicking?All
Ye s®Go To 2
No®Go To 4
2 Ignition On, Engine Not Running
Actuate the Air Conditioning Clutch Relay.
Wiggle the Wiring Harness from the Relay to the PCM.
Did the wiggling interrupt the clicking?All
Ye s®Repair as necessary where wiggling caused the clicking to be
interrupted.
Perform Powertrain Verification Test VER-2A.
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-2A.
No®Test Complete.
170
DRIVEABILITY
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Symptom:
P-0703 BRAKE SWITCH STUCK PRESSED OR RELEASED
When Monitored and Set Condition:
P-0703 BRAKE SWITCH STUCK PRESSED OR RELEASED
When Monitored: With engine running. The PCM expects the signal to be high for 16
cycles while it monitors the brake switch signal during accel and decel modes.
Set Condition: After the vehicle speed increases, the PCM must accumulate 6 seconds
while delta throttle voltage is above 0.02 volt. The count is reset to zero whenever the
brake switch indicates a low signal.
POSSIBLE CAUSES
BRAKE SWITCH GROUND CIRCUIT OPEN
BRAKE SWITCH INTERNAL SHORT
BRAKE SWITCH SENSE CIRCUIT OPEN
BRAKE SWITCH SENSE CIRCUIT SHORT TO GROUND
PCM CONNECTOR OBSERVABLE DEFECT
PCM DEF (VOLTAGE HIGH)
PCM DEF (VOLTAGE LOW)
TEST ACTION APPLICABILITY
1 Ignition Off
Disconnect the Brake Switch Connector.
Note: Check connectors - Clean/repair as necessary.
Key on.
With a Voltmeter, measure the Brake Switch Sense Circuit at the Brake Switch
Connector.
Is the voltage above 9.0 volts?All
Ye s®Go To 2
No®Go To 5
2 Ignition Off
Disconnect the Brake Switch Connector.
Note: Check connectors - Clean/repair as necessary.
With an Ohmmeter, measure the Brake Switch Ground Circuit at the Brake Switch
Connector to ground.
Is the resistance below 5.0 ohms?All
Ye s®Go To 3
No®Repair the Brake Switch Ground Circuit.
Perform Powertrain Verification Test VER-2A.
172
DRIVEABILITY
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Symptom:
P-1281 ENGINE IS COLD TOO LONG
When Monitored and Set Condition:
P-1281 ENGINE IS COLD TOO LONG
When Monitored: Ignition key on, engine not running. Ambient temperature greater
than þ11ÉC (-11ÉF) and coolant temperature greater than þ7ÉC (19ÉF)
Set Condition: The engine does not warm to 79 degrees C (176 degrees F) while driving
for 20 minutes after start.
POSSIBLE CAUSES
ENGINE COLD TOO LONG
TEST ACTION APPLICABILITY
1 Start Engine
Drive vehicle under normal driving conditions for 20 minutes.
With the DRB, read Engine Coolant Temperature.
Did the engine warm to 79 degrees C (176 degrees F)?All
Ye s®Test Complete.
No®See pertinent service manual information for cooling system
diagnostics.
177
DRIVEABILITY
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Symptom:
P1282 FUEL PUMP RELAY CONTROL CIRCUIT
When Monitored and Set Condition:
P±1282 FUEL PUMP RELAY CONTROL CIRCUIT
When Monitored: With the ignition key on and battery voltage greater than 10 volts.
Set Condition: An open or shorted condition is detected in the fuel pump relay control
circuit.
POSSIBLE CAUSES
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
FUEL PUMP RELAY DEFECTIVE
FUEL PUMP RELAY CONTROL CIRCUIT OPEN
FUEL PUMP RELAY CONTROL CIRCUIT SHORT TO GROUND
FUEL PUMP RELAY WIRING HARNESS INTER DEF
FUEL PUMP RELAY WIRING HARNESS OBS DEF
PCM DEFECTIVE
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, actuate the Fuel Pump Relay.
Is the Fuel Pump Relay clicking?All
Ye s®Go To 2
No®Go To 4
2 Ignition On, Engine Not Running
With the DRB actuate the Fuel Pump Relay.
Wiggle the Wiring Harness from the Relay to the PCM.
Did the Fuel Pump Relay clicking stop or become erratic while wiggling the wires?All
Ye s®Repair Circuit as necessary where wiggling caused the clicking to
become erratic.
Perform Powertrain Verification Test VER-2A.
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-2A.
No®Test Complete.
178
DRIVEABILITY
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Symptom:
P-1388 AUTO SHUTDOWN RELAY CONTROL CIRCUIT
When Monitored and Set Condition:
P-1388 AUTO SHUTDOWN RELAY CONTROL CIRCUIT
When Monitored: With ignition key on and battery voltage greater than 10 volts.
Set Condition:
POSSIBLE CAUSES
FUSED B(+) CIRCUIT OPEN
AUTO SHUTDOWN RELAY RESISTANCE>=100.0 OHMS
ASD RELAY CONTROL CIRCUIT WIRING HARNESS INTER DEF
ASD RELAY CONTROL CIRCUIT WIRING HARNESS OBSER DEF
AUTO SHUTDOWN RELAY CONTROL CIRCUIT OPEN
AUTO SHUTDOWN RELAY CONTROL CIRCUIT SHORT TO GROUND
PCM DEFECTIVE (AUTO SHUTDOWN RELAY CONTROL CIRCUIT)
TEST ACTION APPLICABILITY
1 Ignition on, Engine Not Running
The ASD Relay is referred to as the Low Pressure Shutoff Relay in CNG
applications.
With the DRB, actuate the Auto Shutdown Relay.
Is the ASD Relay clicking?All
Ye s®Go To 2
No®Go To 4
2 Engine running.
Wiggle the Wiring Harness from the ASD Relay to the PCM.
Did the engine die out when wiggling wires?All
Ye s®Repair circuit as necessary where wiggling caused the engine to
die out.
Perform Powertrain Verification Test VER-2A.
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-2A.
No®Test Complete.
186
DRIVEABILITY
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Symptom:
P-1389 NO ASD RELAY OUTPUT VOLTAGE AT PCM
When Monitored and Set Condition:
P-1389 NO ASD RELAY OUTPUT VOLTAGE AT PCM
When Monitored: With ignition key on and battery voltage greater than 10 volts.
Set Condition: Engine running and no ASD Relay Output Sense at PCM.
POSSIBLE CAUSES
FUSED B(+) CIRCUIT OPEN
ASD RELAY DEFECTIVE
ASD RELAY OUT CKT WIRING HARNESS OBSERVABLE DEFECT
ASD RELAY OUTPUT CIRCUIT OPEN (ENGINE STARTED)
ASD RELAY OUTPUT CKT OPEN (ENGINE DID NOT START)
ASD RLY OUT CKT WIRING HARNESS INTERMITTENT DEFECT
PCM DEFECTIVE (ENGINE DID NOT START)
PCM DEFECTIVE (ENGINE STARTED)
TEST ACTION APPLICABILITY
1 Ignition off.
Is a Trouble Code also set for9ASD Relay Control Circuit?All
Ye s®Refer to symptom P-1388 AUTO SHUTDOWN RELAY CON-
TROL CIRCUIT in the DRIVEABILITY category.
No®Go To 2
2 Ignition on with engine not running.
With the DRB, read Trouble Codes.
Attempt to start the engine and let idle.
Is the Global Good Trip displayed and equal to 0?All
Ye s®Go To 3
No®Go To 10
3 Ignition off.
Attempt to start the engine.
Did the engine start?All
Ye s®Go To 4
No®Go To 6
188
DRIVEABILITY
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Symptom:
P-1491 RADIATOR FAN CONTROL RELAY CIRCUIT
When Monitored and Set Condition:
P-1491 RADIATOR FAN CONTROL RELAY CIRCUIT
When Monitored: With the ignition key on, battery voltage greater than 10 volts, and the
PCM requests the fans to be turned on.
Set Condition: An open or shorted condition is detected in the radiator fan relay control
circuit.
POSSIBLE CAUSES
FUSED B (+) CIRCUIT OPEN
RAD FAN RELAY OUTPUT CIRCUIT, 0 VOLTS TO BATTERY V
RADIATOR FAN RELAY GROUND CIRCUIT OPEN
RADIATOR FAN RELAY DEFECTIVE
RAD FAN RELAY CONTROL CIRCUIT SHORT TO GROUND
RADIATOR FAN MOTORS W/H INTERMITTENT DEFECT
RADIATOR FAN MOTORS W/H OBSERVABLE DEFECT
RADIATOR FAN RELAY CONTROL CIRCUIT OPEN
PCM DEFECTIVE (RADIATOR FAN MOTORS)
TEST ACTION APPLICABILITY
1 Ignition On
With the DRB, actuate the Radiator Fan Relay.
Are both of the Radiator Fan Motors cycling on and off?All
Ye s®Go To 2
No®Go To 4
2 Ignition On
With the DRB, actuate the Radiator Fan Relay.
Wiggle the Wiring Harness from the Relay to the PCM.
Did the wiggling interrupt the Radiator Fan Motor cycling?All
Ye s®Repair as necessary where wiggling caused the cycling to be
interrupted.
Perform Powertrain Verification Test VER-5A.
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-5A.
No®Test Complete.
203
DRIVEABILITY
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TEST ACTION APPLICABILITY
4 Ignition On
With the DRB, actuate the Radiator Fan Relay.
Using a voltmeter, the Fan Relay Output Circuit voltage at the Relay Connector.
Does the voltage cycle from below 1.0 volt to Battery voltage?All
Ye s®Repair or replace Radiator Fans or Relay to Fan Wiring as
necessary.
Perform Powertrain Verification Test VER-5A.
No®Go To 5
5 Ignition Off
Disconnect the Radiator Fan Relay Connector.
Note: Check connectors - Clean/repair as necessary.
Turn key on.
Using a Voltmeter, measure the Fused B(+) Circuit at Relay Connector.
Is the voltage above 10.0 volts?All
Ye s®Go To 6
No®Repair the open Fused B (+) Circuit (check Radiator Fan Fuse in
PDC).
Perform Powertrain Verification Test VER-5A.
6 Ignition Off
Disconnect the Radiator Fan Relay Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the Radiator Fan Relay Ground Circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 7
No®Repair the open Fan Relay Ground Circuit.
Perform Powertrain Verification Test VER-5A.
7 Ignition Off
Disconnect the Radiator Fan Relay Connector.
Disconnect the PCM Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the Radiator Fan Relay Control Circuit to a good
ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Radiator Fan Relay Control Circuit for a short to
ground.
Perform Powertrain Verification Test VER-5A.
No®Go To 8
8 Ignition Off
Disconnect the Radiator Fan Relay Connector.
Disconnect the PCM Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the resistance of the Radiator Fan Relay Control
Circuit from the Relay to the PCM.
Is the resistance below 5.0 ohms?All
Ye s®Go To 9
No®Repair the open Radiator Fan Relay Control Circuit.
Perform Powertrain Verification Test VER-5A.
204
DRIVEABILITY
P-1491 RADIATOR FAN CONTROL RELAY CIRCUIT ÐContinued
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