PINPOINT TEST AD : The Reversing Lamps Are On Continuously
- AD1 CHECK THE BCM CONTROL OF THE REVERSING LAMPS
- Ignition ON.
- Using a scan tool, view BCM PIDs.
- Using a scan tool, select the BCM RVRS_LMPS PID. Command the reverse lamps off.
Do the reversing lamps turn off?
Yes REFER to Automatic Transmission 6F50/6F55 , Symptom Chart: Automatic Transmission - 6F50 and 6F55 to diagnose a TR concern. No GO to AD2. - AD2 CHECK THE BCM OUTPUT
- Ignition OFF.
- Disconnect: BCM C2280D.
- Ignition ON.
Do the reversing lamps continue to illuminate?
Yes GO to AD3. No GO to AD4. - AD3 CHECK THE REVERSING LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: Auto-Dimming Interior Rear View Mirror.
- Ignition ON.
Do the reversing lamps continue to illuminate?
Yes REPAIR the circuit. No INSTALL a new auto-dimming interior rear view mirror. REFER to Rear View Mirrors . - AD4 CHECK FOR CORRECT BCM OPERATION
- Disconnect and inspect all 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 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 OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM. REFER to Multifunction Electronic Modules - Without Intelligent Access or REFER to Multifunction Electronic Modules - With Intelligent Access . 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.