Pinpoint Test
- BYPASS THE Body Control Module (BCM)NOTE: If the fuse in the jumper wire fails, refer to the SYSTEM WIRING DIAGRAMS to identify the possible causes of the circuit short. After the repair:
If Diagnostic Trouble Code (DTC) U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the on-demand self-test (required to enable the backlighting output driver if Diagnostic Trouble Code (DTC) U1000:00 is present).
If Diagnostic Trouble Code (DTC) U3000:49 is present, INSTALL a new Body Control Module (BCM). REFER to BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA) or REFER to BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA) .
- Ignition OFF.
- Disconnect: Body Control Module (BCM) C2280B.
- Connect a fused jumper wire:
- Do the backlighting components illuminate?
- Yes: REMOVE the jumper wire. GO to step 2 .
- No: REMOVE the jumper wire. VERIFY the Body Control Module (BCM) fuse 12 (15A) is OK. If OK, REPAIR the Body Control Module (BCM) dimmable backlighting output circuit for an open.
- CHECK FOR CORRECT Body Control Module (BCM) OPERATION
- Disconnect and inspect all Body Control Module (BCM) connectors.
- Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Reconnect the Body Control Module (BCM) connectors. Make sure they seat and latch correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
- Yes: CHECK On-Line Automotive Service Information System (OASIS) for any applicable Technical Service Bulletins (TSBs). If a Technical Service Bulletin (TSB) exists for this concern, DISCONTINUE this test and FOLLOW Technical Service Bulletin (TSB) instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new Body Control Module (BCM). REFER to BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA) or REFER to BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA) .
- No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.