2001 CHRYSLER VOYAGER air condition

Symptom:
REMOTE RADIO SWITCH STUCK
When Monitored and Set Condition:
REMOTE RADIO SWITCH STUCK
When Monitored: With the ignition on.
Set Condition: The code will set if the BCM detects a stuck switch or a short to ground on
the Radio Control MUX circuit for more than 10 seconds.
POSSIBLE CAUSES
INTERMITTENT CONDITION
LEFT REMOTE RADIO SWITCH SHORTED TO GROUND
RIGHT REMOTE RADIO SWITCH SHORTED TO GROUND
RADIO CONTROL MUX CIRCUIT SHORTED TO GROUND AT THE SWITCH
RADIO CONTROL MUX CIRCUIT SHORTED TO THE RETURN CIRCUIT AT THE SWITCH
CLOCKSPRING SHORTED TO GROUND
RADIO CONTROL MUX CIRCUIT SHORTED TO GROUND
RADIO CONTROL MUX CKT SHORTED TO THE RADIO CONTROL MUX RETURN CKT
BODY CONTROL MODULE
TEST ACTION APPLICABILITY
1 With the DRB, erase DTC's.
Cycle the ignition switch from off to on and wait approximately 1 minute.
With the DRB, read DTC's.
Did this DTC reset?All
Ye s®Go To 2
No®Refer to the wiring diagrams located in the service information to
help isolate a possible intermittent short.
Perform BODY VERIFICATION TEST - VER 1.
2WARNING: Turn the ignition off, disconnect the battery and wait 2 minutes
before proceeding.
CAUTION: Do not place an intact undeployed airbag module face down on
a hard surface, the airbag module will propel into the air if accidently
deployed.
Remove the Driver Airbag Module.
Disconnect the Left Remote Radio Switch harness connector.
Turn the ignition on, reconnect the battery.
With the DRB, enter Body Computer then Sensors and monitor the Radio Control SW
voltage
Is the voltage approximately 5.0 volts?All
Ye s®Replace the Left Remote Radio Switch.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
219
AUDIO

Symptom List:
AC PRESSURE TOO HIGH (ACTIVE)
AC PRESSURE TOO LOW (ACTIVE)
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be AC PRESSURE TOO HIGH
(ACTIVE).
When Monitored and Set Condition:
AC PRESSURE TOO HIGH (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed. Also monitored during
the Cooldown Test.
Set Condition: This DTC is set if the ATC reads the A/C Pressure Sensor value and it is
above 250 A/D counts.
AC PRESSURE TOO LOW (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed. Also monitored during
the Cooldown Test.
Set Condition: This DTC is set if the ATC reads the A/C Pressure Sensor value and it is
below 20 A/D counts.
POSSIBLE CAUSES
PCM/ECM DTC(S) PRESENT
AT C
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, read PCM/ECM DTCs.
Does the DRBIIItdisplay any PCM/ECM DTCs?All
Ye s®Refer to Powertrain Diagnostic information for the related symp-
tom(s).
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the ATC.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
225
AUTOMATIC TEMPERATURE CONTROL

AC PRESSURE TOO HIGH (STORED)
When Monitored: With the ignition on and the IOD fuse installed. Also monitored during
the Cooldown Test.
Set Condition: This DTC is set if the ATC reads the A/C Pressure Sensor value and it is
above 250 A/D counts.
AC PRESSURE TOO LOW (STORED)
When Monitored: With the ignition on and the IOD fuse installed. Also monitored during
the Cooldown Test.
Set Condition: This DTC is set if the ATC reads the A/C Pressure Sensor value and it is
below 20 A/D counts.
DRIVER BLEND DOOR NOT RESPONDING (STORED)
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.
DRIVER BLEND DOOR RANGE TOO LARGE (STORED)
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.
DRIVER BLEND DOOR TRAVEL TOO SMALL (STORED)
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.
FRONT IR SENSOR AND CONTROL HEAD MISMATCH (STORED)
When Monitored: Every 8 seconds with the ignition on.
Set Condition: This condition is set if the ATC does not receive the intake air temperature
response message within 8 seconds.
FRONT IR SENSOR HIGH (STORED)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set if the ATC reads the Front IR Sensor value and it is above
250 A/D counts.
FRONT IR SENSOR LOW (STORED)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set if the ATC reads the Front IR Sensor value and it is below
5 A/D counts.
227
AUTOMATIC TEMPERATURE CONTROL
AC PRESSURE TOO HIGH (STORED) ÐContinued

FRONT IR SENSOR NOT CALIBRATED (STORED)
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.
FRONT MODE DOOR NOT RESPONDING (STORED)
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.
FRONT MODE DOOR TRAVEL TOO LARGE (STORED)
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.
FRONT MODE DOOR TRAVEL TOO SMALL (STORED)
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.
PASS BLEND DOOR NOT RESPONDING (STORED)
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.
PASS BLEND DOOR TRAVEL TOO LARGE (STORED)
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.
PASS BLEND DOOR TRAVEL TOO SMALL (STORED)
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.
PCI BUS SHORTED HIGH (STORED)
When Monitored: With the ignition on.
Set Condition: This DTC is set if the ATC detects a short to voltage on the PCI Bus circuit.
PCI BUS SHORTED LOW (STORED)
When Monitored: With the ignition on.
Set Condition: This DTC is set if the ATC detects a short to ground on the PCI Bus circuit.
228
AUTOMATIC TEMPERATURE CONTROL
AC PRESSURE TOO HIGH (STORED) ÐContinued

REAR BLEND DOOR NOT RESPONDING (STORED)
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.
REAR BLEND DOOR RANGE TOO LARGE (STORED)
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.
REAR BLEND DOOR TRAVEL TOO SMALL (STORED)
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.
REAR FAN POT OPEN (STORED)
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 (STORED)
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 (STORED)
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 (STORED)
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 IR SENSOR NOT CALIBRATED (STORED)
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.
229
AUTOMATIC TEMPERATURE CONTROL
AC PRESSURE TOO HIGH (STORED) ÐContinued

Symptom:
COOLDOWN TEST FAILED
When Monitored and Set Condition:
COOLDOWN TEST FAILED
When Monitored: When executing the Cooldown Test.
Set Condition: This DTC is set if the A/C system is unable to bring the evaporator
temperature down 6.7ÉC (20ÉF) within two minutes.
POSSIBLE CAUSES
OTHER COOLDOWN TEST MESSAGES PRESENT
ATC DTC(S) PRESENT
CHECK THE PCM/ECM FOR DTCS
A/C SYSTEM TESTING
TEST ACTION APPLICABILITY
1NOTE: The work area ambient temperature must be above 10ÉC (50ÉF) to
test A/C system operation.
Are any other messages displayed with the Cooldown Test Failed message?All
Ye s®Return to the symptom list and choose the symptom(s).
After the repair is complete, rerun the Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
2NOTE: The work area ambient temperature must be above 10ÉC (50ÉF) to
test A/C system operation.
Turn the ignition on.
With the DRBIIIt, read ATC DTCs.
Does the DRBIIItdisplay any ATC DTCs?All
Ye s®Return to the symptom list and choose the symptom(s).
After the repair is complete, rerun the Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
232
AUTOMATIC TEMPERATURE CONTROL

Symptom:
DRIVER BLEND DOOR NOT RESPONDING (ACTIVE)
When Monitored and Set Condition:
DRIVER BLEND 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
DRIVER BLEND DOOR DRIVER CIRCUIT (A) SHORTED TO GROUND
DRIVER BLEND DOOR DRIVER CIRCUIT (B) SHORTED TO GROUND
DRIVER BLEND DOOR DRIVER CIRCUITS (A) AND (B) SHORTED TOGETHER
DRIVER BLEND DOOR DRIVER CIRCUIT (A) OPEN
DRIVER BLEND DOOR DRIVER CIRCUIT (B) OPEN
AT C
DRIVER BLEND DOOR ACTUATOR
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the Driver Blend Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Driver Blend Door Driver (A) circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 2
No®Repair the Driver Blend 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 Driver Blend Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Driver Blend Door Driver (B) circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 3
No®Repair the Driver Blend 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.
234
AUTOMATIC TEMPERATURE CONTROL

Symptom:
DRIVER BLEND DOOR TRAVEL TOO LARGE (ACTIVE)
When Monitored and Set Condition:
DRIVER BLEND 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
DRIVER BLEND DOOR ACTUATOR
DRIVER BLEND DOOR LINKAGE
AT C
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, read the active ATC DTCs.
Is the DRIVER BLEND 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 Driver Blend Door Actuator.
By hand, attempt to rotate the driver blend door motor in both directions.
Did the blend door actuator turn in either direction?All
Ye s®Replace the Driver Blend Door Actuator.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
236
AUTOMATIC TEMPERATURE CONTROL