Fcm, Hvac Communication Fault - Chrysler Town and Country 2003 Owner's Manual

Symptom:

FCM, HVAC COMMUNICATION FAULT

When Monitored and Set Condition:
FCM, HVAC COMMUNICATION FAULT
When Monitored: With the ignition in run, and the IOD fuse installed.
Set Condition: The FCM does not receive any messages from the Automatic Temperature
Control (ATC) module or the A/C Heater Control (MTC) for at least 20 seconds.
ATTEMPT TO COMMUNICATE WITH THE HVAC
FRONT CONTROL MODULE
TEST
1 Turn the ignition on.
With the DRB, attempt to communicate with the A/C Heater Control (MTC) or the
Automatic Temp Control (ATC).
Was the DRB able to I/D or communicate with the HVAC or the ATC?
Yes → Go To 2
→ Refer to the Communication category for the related symptom(s).
No
2 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?
Yes → Replace the Front Control Module in accordance with the service
→ Test Complete.
No
POSSIBLE CAUSES
ACTION
Perform BODY VERIFICATION TEST - VER 1.
information.
Perform BODY VERIFICATION TEST - VER 1.
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COMMUNICATION
APPLICABILITY
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