Dodge Ram 2004, Service Manual

Page: 275 / 642

Symptom:
FCM - VIN NOT LEARNED CORRECTLY
When Monitored and Set Condition:
FCM - VIN NOT LEARNED CORRECTLY
When Monitored: With the ignition on.
Set Condition: The VIN is programmed into the FCM via PCI Bus messages from the
PCM/ECM. When learning the VIN, the FCM computes a check digit to verify that the VIN
learned was valid. If not valid, the DTC will set and the VIN will not be learned.
POSSIBLE CAUSES
VIN NOT LEARNED CORRECTLY
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, erase FCM DTC’s.
Turn the ignition off then turn the ignition on and wait approximately 1 minute.
With the DRB, read FCM DTC’s.
Did this DTC reset? All
Yes
→
Replace the Front Control Module in accordance with the service
information.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Test Complete.
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COMMUNICATION