light CHRYSLER VOYAGER 2001 Service Manual

TEST ACTION APPLICABILITY
4 Turn the ignition off.
Disconnect the Body Control Module harness connector.
Disconnect the Multifunction Switch harness connector.
Measure the resistance between the Multifunction Switch MUX Return circuit and
the Turn Signal Switch MUX circuit.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Turn Signal Switch MUX circuit for a short to the
Multifunction Switch MUX Return circuit.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off.
Disconnect the Body Control Module harness connector.
Disconnect the Multifunction Switch harness connector.
Measure the resistance between the Multifunction Switch MUX Return circuit and
ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Multifunction Switch MUX Return circuit for a short
to ground.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
511
EXTERIOR LIGHTING
TURN SIGNAL SWITCH INPUT SHORT ÐContinued

Symptom List:
A/C FAULT (STORED) - MANUAL A/C
BACKLIGHT DIMMING RX FAILURE (STORED) - MANUAL A/C
BLEND OVERCURRENT (STORED) - MANUAL A/C
CHECKSUM FAILURE (STORED) - MANUAL A/C
EVAPORATOR TEMPERATURE SENSOR CIRCUIT OPEN
(STORED) - MANUAL A/C
EVAPORATOR TEMPERATURE SENSOR CIRCUIT SHORT
(STORED) - MANUAL A/C
LOOPBACK FAILURE (STORED) - MANUAL A/C
LOOPBACK TEST FAILURE (STORED) - MANUAL A/C
MODE OVERCURRENT (STORED) - MANUAL A/C
NO BCM MESSAGE RECEIVED (STORED) - MANUAL A/C
NO PCM MESSAGE RECEIVED (STORED) - MANUAL A/C
PCM COMMUNICATION FAILURE (STORED) - MANUAL A/C
POWER FAULT (STORED) - MANUAL A/C
REAR BLEND OVERCURRENT (STORED) - MANUAL A/C
REAR BLEND POT CIRCUIT OPEN (STORED) - MANUAL A/C
REAR BLEND POT CIRCUIT SHORT (STORED) - MANUAL A/C
REAR DEFOG FAILURE (STORED) - MANUAL A/C
REAR MODE OVERCURRENT (STORED) - MANUAL A/C
RECIRC OVERCURRENT (STORED) - MANUAL A/C
RECIRCULATION FAULT (STORED) - MANUAL A/C
TX FAILURE (STORED) - MANUAL A/C
UNKNOWN FAULT DETECTED (STORED) - MANUAL A/C
VEHICLE ODOMETER FAILURE (STORED) - MANUAL A/C
ZONE OVERCURRENT (STORED) - MANUAL A/C
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be A/C FAULT (STORED) - MANUAL
A/C.
When Monitored and Set Condition:
A/C FAULT (STORED) - MANUAL A/C
When Monitored: With the ignition on.
Set Condition: This DTC will set if the A/C switch stays closed for 10 minutes.
BACKLIGHT DIMMING RX FAILURE (STORED) - MANUAL A/C
When Monitored: With the ignition on.
Set Condition: If the A/C - Heater Control Module does not receive the dimming function
message from the BCM for more than 5 seconds, then the A/C - Heater Control Module
LEDs will default to full brightness and the DTC will set.
514
HEATING & A/C

Symptom List:
BACKLIGHT DIMMING RX FAILURE (ACTIVE) - MANUAL A/C
NO BCM MESSAGE RECEIVED (ACTIVE) - MANUAL A/C
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be BACKLIGHT DIMMING RX
FAILURE (ACTIVE) - MANUAL A/C.
When Monitored and Set Condition:
BACKLIGHT DIMMING RX FAILURE (ACTIVE) - MANUAL A/C
When Monitored: With the ignition on.
Set Condition: If the A/C - Heater Control Module does not receive the dimming function
message from the BCM for more than 5 seconds, then the A/C - Heater Control Module
LEDs will default to full brightness and the DTC will set.
NO BCM MESSAGE RECEIVED (ACTIVE) - MANUAL A/C
When Monitored: With the igntion on.
Set Condition: If the A/C - Heater Control Module does not receive the dimming function
message from the BCM for more than 5 seconds, then the A/C - Heater Control Module
LEDs will default to full brightness and the DTC will set.
POSSIBLE CAUSES
ADDITIONAL CODE(S) PRESENT
A/C - HEATER CONTROL MODULE
BODY CONTROL MODULE - NO DIM MESSAGE TO A/C - HEATER CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, read the BCM codes.
Does DRBIIItdisplay Headlamp Switch: Mismatch; STG; Open; or Panel Dim
Output Short?All
Ye s®Refer to symptoms Headlamp Switch Mismatch, Headlamp
Switch Shorted To Ground, and Headlamp Switch Open in the
Exterior Lighting catagory. Refer to symptom Panel Dimming
Output Short in the Instrument Cluster catagory.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
519
HEATING & A/C

TEST ACTION APPLICABILITY
2 Turn the ignition on.
With the DRBIIItin Monitor Display, PCI Bus Messages, look for the VF DIM Msg
Present.
Does the DRB display: VF DIM Msg present: Yes?All
Ye s®Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Body Control Module in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
520
HEATING & A/C
BACKLIGHT DIMMING RX FAILURE (ACTIVE) - MANUAL A/C ÐContinued

TEST ACTION APPLICABILITY
2 Turn the ignition off.
Remove the applicable door actuator (Blend [Driver (Zone), Passenger], Recircula-
tion, Mode) from the A/C - Heater Housing Assembly.
Disconnect the door actuator harness connector.
By hand, attempt to rotate the door actuator in both directions.
Did the door actuator turn in either direction?All
Ye s®Replace the door actuator in accordance with the Service Infor-
mation.
Perform BODY VERIFICATION TEST - VER 1.
No: Blend Actuator (Driver [Zone], Pass)
Go To 3
No: Recirculation Door Actuator
Go To 4
No: Mode Door Actuator
Go To 5
3 Turn the ignition off.
Remove the applicable blend door actuator (Driver [Zone], Passenger) from the A/C
- Heater Housing Assembly.
Disconnect the blend door actuator harness connector.
Set the applicable blend control switch knob (Driver [Zone], Passenger) to the full
cold position.
Connect a 12-volt Test Light across the blend door actuator harness connector.
Turn the ignition on.
While monitoring the test light, manually sweep the applicable blend control switch
knob (Driver [Zone], Passenger) very slowly from full cold to full hot.
While monitoring the test light, manually sweep the applicable blend control switch
knob (Driver [Zone], Passenger) very slowly from full hot to full cold.
Does the test light start to flash and stay flashing through the entire range?All
Ye s®Inspect A/C - Heater Housing for missing & broken actuator
linkage. Inspect linkage & actuator for broken & missing teeth.
Check doors for binding & loss of full range. Repair as necessary.
If Ok, replace the actuator in accordance with the Service Info.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 6
523
HEATING & A/C
BLEND CALIBRATION FAULT - MANUAL A/C ÐContinued

TEST ACTION APPLICABILITY
4 Turn the mode door knob to the Panel, Bi-level, or Floor position.
Turn the ignition off.
Remove the Recirculation Door Actuator from the A/C - Heater Housing Assembly.
Disconnect the Recirculation Door Actuator harness connector.
Connect a 12-volt Test Light across the Recirculation Door Actuator harness
connector.
Turn the ignition on.
If the LED on the recirculation mode switch is illuminated, manually press the
recirculation mode switch to turn the recirculation mode off.
While monitoring the test light, manually press the recirculation mode switch on
(LED on).
While monitoring the test light, manually press the recirculation mode switch off
(LED off).
Does the test light flash 4 times after pressing the switch on and 2 times after
pressing it off?All
Ye s®Inspect the linkage and the actuator for broken and missing
teeth. Check the door for binding and loss of full range. Repair as
necessary. If Ok, replace the door actuator in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 6
5 Turn the ignition off.
Remove the Mode Door Actuator from the A/C - Heater Housing Assembly.
Disconnect the Mode Door Actuator harness connector.
Turn the mode select switch knob to the panel position, then to the defrost position,
then back to the panel position.
Connect a 12-volt Test Light across the Mode Door Actuator harness connector.
Turn the ignition on.
While monitoring the test light, turn the mode select switch knob to the first detent
after the panel position.
Repeat the previous step for each detent, until reaching the defrost mode position.
Does the test light flash four times after turning the mode select switch knob to each
detent?All
Ye s®Inspect A/C - Heater Housing for missing & broken actuator
linkage. Inspect linkage & actuator for broken & missing teeth.
Check doors for binding & loss of full range. Repair as necessary.
If Ok, replace the actuator in accordance with the Service Info.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 6
6 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Remove the applicable door actuator (Blend [Driver (Zone), Passenger], Recircula-
tion, Mode) from the A/C - Heater Housing Assembly.
Disconnect the door actuator harness connector.
Measure the resistance of the applicable door driver circuit (Blend [Driver (Zone),
Passenger], Recirculation, Mode) between the A/C - Heater Control Module C1
harness connector and the door actuator harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 7
No®Repair the applicable door driver circuit (Blend [Driver (Zone),
Passenger], Recirculation, Mode) for an open.
Perform BODY VERIFICATION TEST - VER 1.
524
HEATING & A/C
BLEND CALIBRATION FAULT - MANUAL A/C ÐContinued

TEST ACTION APPLICABILITY
2 Remove either the Front Blower Motor Relay or the Rear Blower Motor Relay, if
equipped, from the IPM.
Using a 12-volt test light connected to ground, probe cavity 86 of the blower relay
connector.
Is the test light illuminated?All
Ye s®Go To 3
No®Check the B+ feed to the Intelligent Power Module (IPM) for an
open. If OK, replace the IPM in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Install a substitute relay in place of the existing Front Blower Motor Relay and the
existing Rear Blower Motor Relay, if equipped.
With the DRB, erase DTCs.
Turn the ignition off, wait 30 seconds, then turn the ignition on.
With the DRB, read DTCs.
Did these DTCs reset?All
Ye s®Go To 4
No®Replace the Front Blower Motor Relay and the Rear Blower
Motor Relay, if equipped.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Remove the Front Control Module from the IPM.
Remove the Front Blower Motor Relay and the Rear Blower Motor Relay, if equipped,
from the IPM.
Measure the resistance between ground and the Front/Rear Blower Motor Relay
Control circuit (FCM connector cavity 30).
Is the resistance below 5.0 ohms?All
Ye s®Replace the Intelligent Power Module (IPM) in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off.
Remove the Front Control Module from the IPM.
Remove the Front Blower Motor Relay from the IPM.
Measure the resistance of the Front/Rear Blower Motor Relay Control circuit
between the FCM connector cavity 30 and the Front Blower Motor Relay connector
cavity 85.
Is the resistance below 5.0 ohms?All
Ye s®Replace the Front Control Module (FCM) in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Intelligent Power Module (IPM) in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
543
HEATING & A/C
FRONT AND REAR BLOWER OUTPUT 1 OPEN ÐContinued

TEST ACTION APPLICABILITY
2 Turn the ignition off.
Install a substitute relay in place of the existing Front Blower Motor Relay.
With the DRB, erase DTCs.
Turn the ignition on.
With the DRB, read DTCs.
Did these DTCs reset?All
Yes, equipped with rear blower motor
Go To 3
Yes, not equipped with rear blower motor
Go To 4
No®Replace the original Front Blower Motor Relay.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Install a substitute relay in place of the existing Rear Blower Motor Relay.
With the DRB, erase DTCs.
Turn the ignition on.
With the DRB, read DTCs.
Did these DTCs reset?All
Ye s®Go To 4
No®Replace the original Rear Blower Motor Relay.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Remove the Front Control Module from the IPM.
Remove the Front Blower Motor Relay and the Rear Blower Motor Relay, if equipped,
from the IPM.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Front Blower Motor Relay
connector cavity 85.
Is the test light illuminated?All
Ye s®Replace the Intelligent Power Module (IPM) in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Front Control Module (FCM) in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
545
HEATING & A/C
FRONT AND REAR BLOWER OUTPUT 1 SHORT TO BATT ÐContinued

TEST ACTION APPLICABILITY
1 Turn the ignition on.
NOTE: All Overcurrent DTCs must be repaired before diagnosing Calibra-
tion messages.
With the DRBIIIt, read HVAC DTCs.
Does the DRBIIItdisplay any HVAC DTCs?All
Ye s®Return to the symptom list and choose the symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No: Rear Blend Calibration message set.
Go To 2
No: Rear Mode Calibration message set.
Go To 4
2 Turn the ignition off.
Turn the A/C - Heater Control, rear blower control switch knob to the Rear position.
Set the Rear Blower Rear Control, blend control switch knob to the full cold position.
Disconnect the Rear A/C - Heater Unit harness connector.
Connect a 12-volt Test Light between the Rear Blend Door Driver circuit and the
Rear Common Door Driver circuit (Cavity 8) at the Rear A/C - Heater Unit harness
connector (HVAC side).
Turn the ignition on.
While monitoring the test light, manually sweep the Rear Blower Rear Control, rear
blend control switch knob very slowly from full cold to full hot.
While monitoring the test light, manually sweep the Rear Blower Rear Control, rear
blend control switch knob very slowly from full hot to full cold.
Does the test light start to flash and stay flashing through the entire range?All
Ye s®Go To 3
No®Go To 7
3 Turn the ignition off.
Disconnect the Rear A/C - Heater Unit harness connector.
Remove the Rear Blend Door Actuator from the Rear A/C - Heater Housing.
Disconnect the Rear Blend Door Actuator harness connector.
Measure the resistance of the Rear Blend Door Driver circuit between the Rear Blend
Door Actuator harness connector and the Rear A/C - Heater Unit harness connector
(plenum side).
Measure the resistance of the Rear Common Door Driver circuit between the Rear
Blend Door Actuator harness connector and the Rear A/C - Heater Unit harness
connector (Cavity 8) (plenum side).
Is the resistance below 5.0 ohms for both circuits?All
Ye s®Go To 6
No®Repair the circuit with the resistance above 5 ohms for an open.
Perform BODY VERIFICATION TEST - VER 1.
550
HEATING & A/C
REAR BLEND CALIBRATION FAULT - MANUAL A/C ÐContinued

TEST ACTION APPLICABILITY
4 Turn the ignition off.
Turn the A/C - Heater Control, rear blower control switch knob to the Rear position.
Set the Rear Blower Rear Control, blend control switch knob to the full cold position.
Disconnect the Rear A/C - Heater Unit harness connector.
Connect a 12-volt Test Light between the Rear Mode Door Driver circuit and the Rear
Common Door Driver circuit (Cavity 2) at the Rear A/C - Heater Unit harness
connector (HVAC side).
Turn the ignition on.
While monitoring the test light, manually sweep the Rear Blower Rear Control, rear
blend control switch knob very slowly from full cold to full hot.
While monitoring the test light, manually sweep the Rear Blower Rear Control, rear
blend control switch knob very slowly from full hot to full cold.
Does the test light start to flash and stay flashing through the entire range?All
Ye s®Go To 5
No®Go To 7
5 Turn the ignition off.
Disconnect the Rear A/C - Heater Unit harness connector.
Remove the Rear Mode Door Actuator from the Rear A/C - Heater Housing.
Disconnect the Rear Mode Door Actuator harness connector.
Measure the resistance of the Rear Mode Door Driver circuit between the Rear Mode
Door Actuator harness connector and the Rear A/C - Heater Unit harness connector
(plenum side).
Measure the resistance of the Rear Common Door Driver circuit between the Rear
Mode Door Actuator harness connector and the Rear A/C - Heater Unit harness
connector (Cavity 2) (plenum side).
Is the resistance below 5.0 ohms for both circuits?All
Ye s®Go To 6
No®Repair the circuit with the resistance above 5 ohms for an open.
Perform BODY VERIFICATION TEST - VER 1.
6 Turn the ignition off.
Remove the applicable door actuator (Rear Blend, Rear Mode) from the Rear A/C -
Heater Housing.
Disconnect the door actuator harness connector.
By hand, attempt to rotate the door actuator in both directions.
Did the door actuator turn in either direction?All
Ye s®Replace the door actuator in accordance with the Service Infor-
mation.
Perform BODY VERIFICATION TEST - VER 1.
No®Inspect the Rear A/C - Heater Housing for missing and broken
actuator linkage. Inspect the linkage and the actuator for broken
and missing teeth. Check the doors for binding and loss of full
range. Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
551
HEATING & A/C
REAR BLEND CALIBRATION FAULT - MANUAL A/C ÐContinued