DTC P1635 GMC
FCAN Malfunction (VTM-4 Control Module To PCM)
FCAN Malfunction (VTM-4 Control Module To PCM)
Description
DTC U0073 not set; and the PCM detected a problem in the FCAN communication circuit to the Vehicle Navigation Module (VTM) or the VSA control module.
Cause and Solution
Check for loose connections at VTM-4 unit (intermittent fault) Check for any Body Control Module trouble codes FCAN communication circuit to the VTM-4 is open, shorted to ground or B+
Video Guide
Diagnostic Info
- DTC Code: P1635
- Brand: GMC