CHRYSLER VOYAGER 2000 Diagnostic Manual
Manufacturer: CHRYSLER, Model Year: 2000, Model line: VOYAGER, Model: CHRYSLER VOYAGER 2000Pages: 364, PDF Size: 2.17 MB
Page 171 of 364

Symptom:
P-0505C IDLE AIR CONTROL MOTOR CIRCUIT
POSSIBLE CAUSES
IAC MOTOR DRIVER (IAC #2) CIRCUIT OPEN
PCM CONN (IAC#2) TERM DAMAGED, PUSH OUT, OR MISWIRED
PCM DEF (IAC #2)
TEST ACTION APPLICABILITY
1 Ignition Off
Disconnect the Powertrain Control Module Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure resistance of the IAC #2 Driver Circuit from the IAC
Motor Connector to the PCM Connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 2
No®Repair the open IAC Motor Driver Control Circuit.
Perform Powertrain Verification Test VER-5A.
2 Ignition Off
Disconnect the Powertrain Control Module.
Note: Check connectors - Clean/repair as necessary.
Visually inspect Connector.
Is any Terminal damaged, pushed out, or miswired?All
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-5A.
No®Go To 3
3 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
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Page 172 of 364

Symptom:
P-0505D IDLE AIR CONTROL MOTOR CIRCUIT
POSSIBLE CAUSES
IAC MOTOR DRIVER (IAC#3) CIRCUIT OPEN
PCM CONN (IAC#3) TERM DAMAGED, PUSH OUT, OR MISWIRED
PCM DEF (IAC #3)
TEST ACTION APPLICABILITY
1 Ignition Off
Disconnect the Powertrain Control Module Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure resistance of the IAC #3 Driver Circuit from the IAC
Motor Connector to the PCM Connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 2
No®Repair the open IAC Motor Driver Control Circuit.
Perform Powertrain Verification Test VER-5A.
2 Ignition Off
Disconnect the Powertrain Control Module Connector.
Note: Check connectors - Clean/repair as necessary.
Visually inspect Connector.
Is any Terminal damaged, pushed out, or miswired?All
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-5A.
No®Go To 3
3 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.
166
DRIVEABILITY
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Page 173 of 364

Symptom:
P-0505E IDLE AIR CONTROL MOTOR CIRCUIT
POSSIBLE CAUSES
IAC MOTOR DRIVER (IAC#4) CIRCUIT OPEN
PCM CONN (IAC #4) TERM DAMAGED, PUSH OUT, OR MISWIRED
PCM DEF (IAC#4)
TEST ACTION APPLICABILITY
1 Ignition Off
Disconnect the Powertrain Control Module Connector.
Note: Check connectors - Clean/repair as necessary.
Visually inspect Connector.
Is any Terminal damaged, pushed out, or miswired?All
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-5A.
No®Go To 2
2 Ignition Off
Disconnect the Powertrain Control Module Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure resistance of the IAC #4 Driver Circuit from the IAC
Motor Connector to the PCM Connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 3
No®Repair the open IAC Motor Driver Control Circuit.
Perform Powertrain Verification Test VER-5A.
3 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.
167
DRIVEABILITY
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Page 174 of 364

Symptom:
P-0600 PCM FAILURE SPI COMMUNICATIONS
When Monitored and Set Condition:
P-0600 PCM FAILURE SPI COMMUNICATIONS
When Monitored: With the ignition key on.
Set Condition: Internal Bus Communication failure between processors.
POSSIBLE CAUSES
PCM FAILURE SPI COMMUNICATIONS
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running.
With the DRB, read Trouble Codes.
Is Trouble Code PCM FAILURE SPI COMMUNICATION present?All
Ye s®Replace the Powertrain Control Module.
Perform Powertrain Verification Test VER-2A
No®Test Complete.
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DRIVEABILITY
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Page 175 of 364

Symptom:
P-0601 INTERNAL CONTROLLER FAILURE
When Monitored and Set Condition:
P-0601 INTERNAL CONTROLLER FAILURE
When Monitored: With the ignition key on.
Set Condition: Internal checksum for software failed, does not match calculated value.
POSSIBLE CAUSES
INTERNAL CONTROLLER FAILURE
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running.
With the DRB, read Trouble Codes.
Is Trouble Code INTERNAL CONTROLLER FAILURE present?All
Ye s®Replace the Powertrain Control Module.
Perform Powertrain Verification Test VER-2A
No®Test Complete.
169
DRIVEABILITY
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Page 176 of 364

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.
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DRIVEABILITY
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TEST ACTION APPLICABILITY
4 Ignition Off
Remove the Air Conditioning Clutch Relay.
Note: Check connectors - Clean/repair as necessary.
Using a Voltmeter, measure the Fused Ignition Switch Output Circuit.
Is the voltage above 10.0 volts?All
Ye s®Go To 5
No®Repair the open Fused Ignition Switch Output Circuit.
Perform Powertrain Verification Test VER-2A.
5 Ignition Off
Remove the Air Conditioning Clutch Relay.
Note: Check connectors - Clean/repair as necessary.
Using an ohmmeter, measure the resistance between terminals C (85) and A (86) of
the Air Conditioning Clutch Relay.
Is the resistance below between 50 to 90 ohms?All
Ye s®Go To 6
No®Replace the Air Conditioning Clutch Relay.
Perform Powertrain Verification Test VER-2A.
6 Ignition Off
Disconnect the PCM grey connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the A/C Clutch Control Circuit from the PCM
connector to ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Air Conditioning Clutch Relay Control Circuit for a
short to ground.
Perform Powertrain Verification Test VER-2A.
No®Go To 7
7 Ignition Off
Disconnect the PCM grey connector.
Remove the Air Conditioning Clutch Relay.
Note: Check connectors - Clean/repair as necessary.
Using an ohmmeter, measure the resistance of the Air Conditioning Clutch Relay
Control Circuit from the relay to the PCM.
Is the resistance below 5.0 ohms?All
Ye s®Go To 8
No®Repair open Air Conditioning Clutch Relay Control Circuit.
Perform Powertrain Verification Test VER-2A.
8 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-2A.
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DRIVEABILITY
P-0645 A/C CLUTCH RELAY CIRCUIT ÐContinued
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Page 178 of 364

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.
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DRIVEABILITY
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TEST ACTION APPLICABILITY
3 Ignition off.
Disconnect the Brake Switch Connector.
Note: Check connectors - Clean/repair as necessary.
Ignition on with engine not running.
Monitor Brake Switch status on the DRB while performing the next step.
Connect a jumper across the Brake Switch Circuit to Ground Circuit.
Did the DRB change from9pressed9to9released9?All
Ye s®Replace or adjust the Brake Switch.
Perform Powertrain Verification Test VER-2A.
No®Go To 4
4 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.
5 Ignition Off
Disconnect the Powertrain Control Module.
Disconnect the Brake Switch Connector.
Note: Check connectors - Clean/repair as necessary.
With an Ohmmeter, measure the Brake Switch Sense Circuit resistance from the
PCM to the Brake Switch Connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 6
No®Repair the Brake Switch Sense Circuit for an open.
Perform Powertrain Verification Test VER-2A.
6 Ignition Off
Disconnect the Powertrain Control Module.
Note: Check connectors - Clean/repair as necessary.
Is any terminal damaged, pushed out, or miswired?All
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-2A.
No®Go To 7
7 Ignition Off
Disconnect the Powertrain Control Module.
Disconnect the Brake Switch Connector.
Note: Check connectors - Clean/repair as necessary.
With an Ohmmeter, measure the Brake Switch Sense Circuit to a good ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Brake Switch Sense Circuit for a short to ground.
Perform Powertrain Verification Test VER-2A.
No®Go To 8
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DRIVEABILITY
P-0703 BRAKE SWITCH STUCK PRESSED OR RELEASED ÐContinued
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TEST ACTION APPLICABILITY
8 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.
174
DRIVEABILITY
P-0703 BRAKE SWITCH STUCK PRESSED OR RELEASED ÐContinued
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