2001 CHRYSLER VOYAGER fuse

Symptom List:
REAR FAN POT OPEN (ACTIVE)
REAR FAN POT SHORTED (ACTIVE)
REAR IR SENSOR HIGH (ACTIVE)
REAR IR SENSOR LOW (ACTIVE)
REAR MODE POT OPEN (ACTIVE)
REAR MODE POT SHORTED (ACTIVE)
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be REAR FAN POT OPEN (ACTIVE).
When Monitored and Set Condition:
REAR FAN POT OPEN (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set if the ATC reads the rear blower switch value and it is
above 250 A/D counts.
REAR FAN POT SHORTED (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set if the ATC reads the rear fan switch value and it is below
5 A/D counts.
REAR IR SENSOR HIGH (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set if the ATC reads the Rear IR Sensor value and it is above
250 A/D counts.
REAR IR SENSOR LOW (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set if the ATC reads the Rear IR Sensor value and it is below
5 A/D counts.
REAR MODE POT OPEN (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set if the ATC reads the rear mode select switch value and it
is above 250 A/D counts.
REAR MODE POT SHORTED (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set if the ATC reads the rear mode select switch value and it
is below 5 A/D counts.
274
AUTOMATIC TEMPERATURE CONTROL

Symptom:
REAR IR SENSOR NOT CALIBRATED (ACTIVE)
When Monitored and Set Condition:
REAR IR SENSOR NOT CALIBRATED (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set if the ATC cannot read the IR sensor values or the IR
sensor values are not within a defined range of the HVAC air door motor counts.
POSSIBLE CAUSES
BCM
IGNITION SWITCH (RUN) CIRCUIT OPEN
KDB CLOCK CIRCUIT SHORTED TO VOLTAGE
KDB DATA CIRCUIT SHORTED TO GROUND
KDB DATA CIRCUIT SHORTED TO VOLTAGE
KDB CLOCK CIRCUIT SHORTED TO GROUND
KDB DATA CIRCUIT OPEN
ATC - KDB DATA CIRCUIT FAULT
KDB CLOCK CIRCUIT OPEN
ATC - KDB CLOCK CIRCUIT FAULT
REAR AUTOMATIC TEMPERATURE CONTROL SWITCH
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Turn the ignition on.
Measure the voltage of the Ignition Switch (Run) circuit.
Is the voltage above 10.0 volts?All
Ye s®Go To 2
No®Go To 13
2 Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Turn the ignition on.
Measure the voltage of the KDB Data circuit.
Is the voltage above 10.0 volts?All
Ye s®Go To 3
No®Go To 10
276
AUTOMATIC TEMPERATURE CONTROL

Symptom:
REAR MODE DOOR NOT RESPONDING (ACTIVE)
When Monitored and Set Condition:
REAR MODE DOOR NOT RESPONDING (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set if the ATC does not receive feedback pulses within 5
seconds of the drive voltage being applied.
POSSIBLE CAUSES
REAR MODE DOOR DRIVER CIRCUIT (A) SHORTED TO GROUND
REAR MODE DOOR DRIVER CIRCUIT (B) SHORTED TO GROUND
REAR MODE DOOR DRIVER CIRCUITS (A) AND (B) SHORTED TOGETHER
REAR MODE DOOR DRIVER CIRCUIT (A) OPEN
REAR MODE DOOR DRIVER CIRCUIT (B) OPEN
AT C
REAR MODE DOOR ACTUATOR
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Rear Mode Door Driver (A) circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 2
No®Repair the Rear Mode Door Driver (A) circuit for a short to
ground.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Rear Mode Door Driver (B) circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 3
No®Repair the Rear Mode Door Driver (B) circuit for a short to
ground.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
284
AUTOMATIC TEMPERATURE CONTROL

Symptom:
REAR MODE DOOR TRAVEL TOO LARGE (ACTIVE)
When Monitored and Set Condition:
REAR MODE DOOR TRAVEL TOO LARGE (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set when the ATC monitors the travel range during system
initialization and the measured range is greater than expected.
POSSIBLE CAUSES
CHECK THE ATC FOR DTCS
REAR MODE DOOR ACTUATOR
REAR MODE DOOR LINKAGE
AT C
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, read the active ATC DTCs.
Is the REAR MODE DOOR NOT RESPONDING DTC set?All
Ye s®Return to the symptom list and choose the symptom.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
2 Turn the ignition off.
Remove the Rear Mode Door Actuator.
By hand, attempt to rotate the Rear Mode Door Actuator in both directions.
Did the mode door actuator turn in either direction?All
Ye s®Replace the Rear Mode Door Actuator.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
286
AUTOMATIC TEMPERATURE CONTROL

Symptom:
REAR MODE DOOR TRAVEL TOO SMALL (ACTIVE)
When Monitored and Set Condition:
REAR MODE DOOR TRAVEL TOO SMALL (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set when the ATC monitors the travel range during system
initialization and the measured range is less than expected.
POSSIBLE CAUSES
CHECK THE ATC FOR DTCS
AT C
OBSTRUCTED MODE DOOR
REAR MODE DOOR ACTUATOR
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, read the active ATC DTCs.
Is the REAR MODE DOOR NOT RESPONDING DTC set?All
Ye s®Return to the symptom list and choose the symptom.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
2 Turn the ignition off.
Disconnect the Rear Mode Door Actuator harness connector.
Connect a 12-volt Test Light between the rear mode door driver (A) and (B) circuits
in the Rear A/C Heater Unit harness connector.
Turn the ignition on.
While monitoring the test light, turn the rear mode control knob from lo to hi.
Note: Observe test light for approximately 30 seconds.
Does the test light start to flash and stay flashing?All
Ye s®Go To 3
No®Replace the ATC.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
288
AUTOMATIC TEMPERATURE CONTROL

Symptom:
RECIRC DOOR NOT RESPONDING (ACTIVE)
When Monitored and Set Condition:
RECIRC DOOR NOT RESPONDING (ACTIVE)
When Monitored: Ignition in RUN and IOD fuse installed.
Set Condition: This DTC is set when the ATC does not receive feedback pulses within 5
seconds of the drive voltage being applied.
POSSIBLE CAUSES
RECIRC DOOR DRIVER CIRCUIT (A) SHORTED TO GROUND
RECIRC DOOR DRIVER CIRCUIT (B) SHORTED TO GROUND
RECIRC DOOR DRIVER CIRCUITS (A) AND (B) SHORTED TOGETHER
RECIRC DOOR DRIVER CIRCUIT (A) OPEN
RECIRC DOOR DRIVER CIRCUIT (B) OPEN
AT C
RECIRCULATION DOOR ACTUATOR
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the Recirculation Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Recirculation Door Driver (A)
circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 2
No®Repair the Recirculation Door Driver (A) circuit for a short to
ground.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition off.
Disconnect the Recirculation Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Recirculation Door Driver (B)
circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 3
No®Repair the Recirculation Door Driver (B) circuit for a short to
ground.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
290
AUTOMATIC TEMPERATURE CONTROL

Symptom:
RECIRC DOOR TRAVEL TOO LARGE (ACTIVE)
When Monitored and Set Condition:
RECIRC DOOR TRAVEL TOO LARGE (ACTIVE)
When Monitored: Ignition in RUN and IOD fuse installed.
Set Condition: This DTC is set when the ATC monitors the travel range during system
initialization and the measured range is greater than expected.
POSSIBLE CAUSES
CHECK THE ATC FOR DTCS
RECIRCULATION DOOR ACTUATOR
RECIRCULATION DOOR LINKAGE
AT C
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, read the active ATC DTCs.
Is the RECIRC DOOR NOT RESPONDING DTC set?All
Ye s®Return to the symptom list and choose the symptom.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
2 Turn the ignition off.
Remove the Recirculation Door Actuator.
By hand, attempt to rotate the Recirculation Door Actuator in both directions.
Did the Recirculation Door Actuator turn in either direction?All
Ye s®Replace the Recirculation Door Actuator.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
292
AUTOMATIC TEMPERATURE CONTROL

Symptom:
RECIRC DOOR TRAVEL TOO SMALL (ACTIVE)
When Monitored and Set Condition:
RECIRC DOOR TRAVEL TOO SMALL (ACTIVE)
When Monitored: Ignition in RUN and IOD fuse installed.
Set Condition: This DTC is set when the ATC monitors the travel range during system
initialization and the measured range is less than expected.
POSSIBLE CAUSES
CHECK THE ATC FOR DTCS
AT C
OBSTRUCTED RECIRC DOOR
RECIRCULATION DOOR ACTUATOR
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, read the active ATC DTCs.
Is the RECIRC DOOR NOT RESPONDING DTC set?All
Ye s®Return to the symptom list and choose the symptom.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
2 Turn the ignition off.
Disconnect the Recirculation Door Actuator harness connector.
Connect a 12-volt Test Light between the Recirculation Door Driver (A) and (B)
circuits.
Turn the ignition on.
While monitoring the test light, press the recirculation control button from off to on.
Note: Observe test light for approximately 30 seconds.
Does the test light start to flash and stay flashing?All
Ye s®Go To 3
No®Replace the ATC.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
294
AUTOMATIC TEMPERATURE CONTROL