heating CHRYSLER VOYAGER 2001 Workshop 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 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

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 -
Heater Housing.
Disconnect the door actuator harness connector.
Measure the resistance of the applicable door driver circuit (Rear Blend, Rear 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 8
No®Repair the applicable door driver circuit (Rear Blend, Rear Mode)
for an open.
Perform BODY VERIFICATION TEST - VER 1.
8 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 -
Heater Housing.
Disconnect the door actuator harness connector.
Measure the resistance of the Common Door Driver circuit between the applicable
door actuator harness connector (Rear Blend, Rear Mode) and the A/C - Heater
Control Module C1 harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair the Common Door Driver circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
552
HEATING & A/C
REAR BLEND CALIBRATION FAULT - MANUAL A/C ÐContinued

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 DTC will set if the Rear Blower Rear Control Switch, Rear Blend
Potentiometer/circuit is open.
POSSIBLE CAUSES
REAR TEMPERATURE RETURN CIRCUIT OPEN
REAR BLEND POTENTIOMETER
A/C - HEATER CONTROL MODULE
REAR TEMPERATURE FEEDBACK SIGNAL CIRCUIT OPEN
A/C - HEATER CONTROL MODULE
5 VOLT SUPPLY CIRCUIT OPEN
A/C - HEATER CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Turn the ignition on.
Measure the voltage between the 5 Volt Supply circuit and ground.
Is the voltage above 4.9 volts?All
Ye s®Go To 2
No®Go To 6
2 Turn the ignition off.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Turn the ignition on.
Measure the voltage between the Rear Temperature Feedback Signal circuit and
ground.
Is the voltage above 4.9 volts?All
Ye s®Go To 3
No®Go To 5
553
HEATING & A/C

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

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 resistance of the Rear Temperature Feedback Signal 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®Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair the Rear Temperature Feedback Signal circuit between
the A/C - Heater Control Module C1 harness connector and the
Rear Blower Rear Control C2 harness connector for an open.
Perform BODY VERIFICATION TEST - VER 1.
6 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 5 Volt Supply 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®Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair the 5 Volt Supply circuit between the A/C - Heater Control
Module C1 harness connector and the Rear Blower Rear Control
C2 harness connector for an open.
Perform BODY VERIFICATION TEST - VER 1.
555
HEATING & A/C
REAR BLEND POT CIRCUIT OPEN (ACTIVE) - MANUAL A/C ÐContinued

Symptom:
REAR BLEND POT CIRCUIT SHORT (ACTIVE) - MANUAL A/C
When Monitored and Set Condition:
REAR BLEND POT CIRCUIT SHORT (ACTIVE) - MANUAL A/C
When Monitored: When the ignition is on.
Set Condition: This DTC will set if the Rear Blower Rear Control Switch, Rear Blend
Potentiometer/5 Volt Supply/Rear Temperature Feedback Signal circuit is shorted low or
high.
POSSIBLE CAUSES
REAR BLEND POTENTIOMETER SHORTED
5 VOLT SUPPLY CIRCUIT SHORTED TO REAR TEMPERATURE RETURN CIRCUIT
5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
REAR TEMPERATURE FEEDBACK SIGNAL CIRCUIT SHORTED TO GROUND
A/C - HEATER CONTROL MODULE
5 VOLT SUPPLY CIRCUIT SHORTED TO REAR TEMPERATURE FEEDBACK SIGNAL CIRCUIT
5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
REAR TEMPERATURE FEEDBACK SIGNAL CIRCUIT SHORTED TO VOLTAGE
REAR TEMPERATURE FEEDBACK SIGNAL CKT SHORTED TO REAR TEMPERATURE RETURN
CKT
A/C - HEATER CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Turn the ignition on.
With the DRBIIItin Input/Output Display, read the Rear Blend position status.
What is the Rear Blend position status?All
Open
Replace the Rear Blower Rear Control Switch in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Full Cold
Go To 2
Full Hot
Go To 5
556
HEATING & A/C

TEST ACTION APPLICABILITY
2 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 between the 5 Volt Supply circuit and the Rear Temperature
Return circuit.
Is the resistance above 10K ohms?All
Ye s®Go To 3
No®Repair the 5 Volt Supply circuit for a short to the Rear Temper-
ature Return circuit.
Perform BODY VERIFICATION TEST - VER 1.
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 between ground and the 5 Volt Supply circuit.
Is the resistance above 10K ohms?All
Ye s®Go To 4
No®Repair the 5 Volt Supply circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
4 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 between ground and the Rear Temperature Feedback Signal
circuit.
Is the resistance above 10K ohms?All
Ye s®Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair the Rear Temperature Feedback Signal circuit for a short
to ground.
Perform BODY VERIFICATION TEST - VER 1.
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 resistance between the 5 Volt Supply circuit and the Rear Temperature
Feedback Signal circuit.
Is the resistance above 10K ohms?All
Ye s®Go To 6
No®Repair the 5 Volt Supply circuit for a short to the Rear Temper-
ature Feedback Signal circuit.
Perform BODY VERIFICATION TEST - VER 1.
557
HEATING & A/C
REAR BLEND POT CIRCUIT SHORT (ACTIVE) - MANUAL A/C ÐContinued

TEST ACTION APPLICABILITY
6 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Turn the ignition on.
Measure the voltage between the 5 Volt Supply circuit and ground.
Is there any voltage present?All
Ye s®Repair the 5 Volt Supply circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 7
7 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Turn the ignition on.
Measure the voltage between the Rear Temperature Feedback Signal circuit and
ground.
Is there any voltage present?All
Ye s®Repair the Rear Temperature Feedback Signal circuit for a short
to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 8
8 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 between the Rear Temperature Feedback Signal circuit and
the Rear Temperature Return circuit.
Is the resistance above 10K ohms?All
Ye s®Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair the Rear Temperature Feedback Signal circuit for a short
to the Rear Temperature Return circuit.
Perform BODY VERIFICATION TEST - VER 1.
558
HEATING & A/C
REAR BLEND POT CIRCUIT SHORT (ACTIVE) - MANUAL A/C ÐContinued

Symptom:
TX FAILURE (ACTIVE) - MANUAL A/C
When Monitored and Set Condition:
TX FAILURE (ACTIVE) - MANUAL A/C
When Monitored: When the ignition is on.
Set Condition: This DTC will set if the A/C - Heater Control Module is unable to send a
message.
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE HVAC MODULE
ADDITIONAL CODE(S) PRESENT
ATTEMPT TO COMMUNICATE WITH THE PCM/ECM, BCM, AND FCM
A/C - HEATER CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, attempt to communicate with the HVAC Module.
Was the DRBIIItable to I/D or communicate with the HVAC Module?All
Ye s®Go To 2
No®Refer to Communication for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition on.
With the DRBIIIt, read HVAC DTCs.
Does the DRBIIItdisplay any additional HVAC DTCs?All
Ye s®Return to the symptom list and choose the symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
3 Turn the ignition on.
With the DRBIIIt, attempt to communicate with the PCM/ECM.
With the DRBIIIt, attempt to communicate with the BCM.
With the DRBIIIt, attempt to communicate with the FCM.
Was the DRBIIItable to I/D or communicate with the PCM/ECM, BCM and FCM?All
Ye s®Go To 4
No®Refer to Communication for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
559
HEATING & A/C

TEST ACTION APPLICABILITY
4 Turn the ignition on.
With the DRBIIIt, erase HVAC DTCs.
Cycle the ignition switch and wait approximately 1 minute.
With the DRBIIIt, read HVAC DTC's.
Did this DTC reset?All
Ye s®Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Test Complete.
560
HEATING & A/C
TX FAILURE (ACTIVE) - MANUAL A/C ÐContinued