2001 CHRYSLER VOYAGER Service Manual

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Page 577 of 4284

CHRYSLER VOYAGER 2001 Service Manual TEST ACTION APPLICABILITY
2 Turn the ignition on.
With the DRBIIIt, attempt to communicate with the PCM/ECM.
Was the DRBIIItable to communicate with the PCM/ECM?All
Ye s®Go To 3
No®Refer to Communic

Page 578 of 4284

CHRYSLER VOYAGER 2001 Service Manual Symptom List:
REAR BLEND CALIBRATION FAULT - MANUAL A/C
REAR MODE CALIBRATION FAULT - MANUAL A/C
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will b

Page 579 of 4284

CHRYSLER VOYAGER 2001 Service Manual 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 HV

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

Page 580 of 4284

CHRYSLER VOYAGER 2001 Service Manual 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 t

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

Page 581 of 4284

CHRYSLER VOYAGER 2001 Service Manual TEST ACTION APPLICABILITY
7 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Remove the applicable door actuator (Rear Blend, Rear Mode) from the Rear A/C -
Heat

Page 582 of 4284

CHRYSLER VOYAGER 2001 Service Manual Symptom:
REAR BLEND POT CIRCUIT OPEN (ACTIVE) - MANUAL A/C
When Monitored and Set Condition:
REAR BLEND POT CIRCUIT OPEN (ACTIVE) - MANUAL A/C
When Monitored: With the ignition on.
Set Condition: This

Page 583 of 4284

CHRYSLER VOYAGER 2001 Service Manual TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Measure the res

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Measure the resistance of the Rear Temperature Return circuit between the A/C -
Heater Control Module C1 harness connector and the Rear Blower Rear Control
Switch C2 harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 4
No®Repair the Rear Temperature Return circuit between the A/C -
Heater Control Module C1 harness connector and the Rear
Blower Rear Control Switch C2 harness connector for an open.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
NOTE: Make sure that the Rear Blower Rear Control Switch C2 harness
connector is connected to the Rear Blower Rear Control Switch.
Measure the resistance of the Rear Blower Rear Control Switch, Rear Blend
Potentiometer as follows:
Turn the Rear Blend knob to full hot.
Measure the resistance between the 5 Volt Supply circuit and the Rear Temperature
Feedback Signal circuit at the A/C - Heater Control Module C1 harness connector.
The resistance should be approximately 2K ohms.
Slowly rotate the Rear Blend knob from full hot to full cold while viewing the DVOM.
The reading should change fluidly from approximately 2K to 10.5K ohms.
Turn the Rear Blend knob to full hot.
Measure the resistance between the 5 Volt Supply circuit and the Rear Temperature
Return circuit at the A/C - Heater Control Module C1 harness connector. The
resistance should be approximately 10.9K ohms.
Slowly rotate the Rear Blend knob from full hot to full cold while viewing the DVOM.
The reading should stay steady at approximately 10.9K ohms.
Turn the Rear Blend knob to full hot.
Measure the resistance between the Rear Temperature Return circuit and the Rear
Temperature Feedback Signal circuit at the A/C - Heater Control Module C1 harness
connector. The resistance should be approximately 10.2K ohms.
Slowly rotate the Rear Blend knob from full hot to full cold while viewing the DVOM.
The reading should change fluidly from approximately 10.2K to 1.9K ohms.
Are all of the resistance measurements as specified?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 Rear Blower Rear Control Switch in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
554
HEATING & A/C
REAR BLEND POT CIRCUIT OPEN (ACTIVE) - MANUAL A/C ÐContinued

Page 584 of 4284

CHRYSLER VOYAGER 2001 Service Manual TEST ACTION APPLICABILITY
5 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Measure the res

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