:  Dec 17, 2007



Overview

For information on the description and operation of the system, refer to section 417-01 - Exterior Lighting of the workshop manual.

Inspection and Verification

. Verify the customer concern.

. Visually inspect for obvious electrical faults.

Mechanical Electrical
  • Reversing lamp condition and installation
  • Bulb and installation
  • Bulb holder and installation
  • Fuses Battery junction box (BJB) - link 16E BJB - link 11E Central junction box (CJB) - Fuse 5P
  • Wiring harness
  • Loose or corroded connector(s)
  • Reversing lamp relay
  • Battery junction box (BJB)
  • Central junction box (CJB)
  • Transmission control module (TCM)
  • Controller area network (CAN) circuits

. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

. Use the approved diagnostic system or a scan tool to retrieve any diagnostic trouble codes (DTCs) before moving onto the symptom chart or DTC index.
  Because the DTCs are stored in more than one module, a complete vehicle read is recommended.
Because the DTCs are stored in more than one module, a complete vehicle read is recommended.
  Make sure that all DTCs are cleared following rectification
Make sure that all DTCs are cleared following rectification

Symptom Chart

Symptom Possible causes Action
Reversing lamp(s) inoperative
  • Bulb failure
  • Fuse(s) blown
  • Circuit fault
  • Missing reversing switch signal
Check the bulb and fuse condition (see visual inspection). Check the reversing lamp circuits. Refer to the electrical guides. Check for DTCs indicating a reversing lamp circuit fault.
Reversing lamp(s) dim
  • Incorrect bulb rating
  • Circuit fault
Check the bulb condition and rating. Check the reversing lamp circuits. Refer to the electrical guides.

DTC index

:
  Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).

DTC Description Possible causes Action
B1C8812 Reversing Lamps Relay Coil Circuit
  • Reversing lamps relay coil circuit short circuit to power
Check the reversing lamp relay coil and circuits. Refer to the electrical guides.
B1C8814 Reversing Lamps Relay Coil Circuit
  • Reversing lamps relay coil circuit high resistance
  • Reversing lamps relay coil circuit: short circuit to ground
Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1C8912 Reversing Lamps Relay Output Circuit
  • Reversing lamps relay output circuit short circuit to power
Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1C8914 Reversing Lamps Relay Output Circuit
  • Reversing lamps relay output coil circuit high resistance
  • Reversing lamps relay output coil circuit short circuit to ground
Refer to the guided diagnostic routine for this code on the approved diagnostic system.
U1A1449 CAN Initialization Failure
  • Internal electronic failure
Check the power and ground circuits to the component. Refer to the electrical guides. Configure the module(s) using the approved diagnostic system. Refer to the warranty policy and procedures manual if a module is suspect.