B2545

DTC B2545

DTC Descriptor
DTC B2545 00
- Backup Lamps Circuit

Diagnostic Fault Information

Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview






Circuit/System Description

When the PRNDL is placed in the REVERSE position, a signal is sent to the body control module (BCM). The BCM then applies voltage through the backup lamps voltage supply circuit to the LED driver module. The LED drive module then illuminates the backup lamps.

Conditions for Running the DTC

The ignition is ON. The backup lamps must be commanded ON.

Conditions for Setting the DTC

The BCM receives a ground signal on the backup lamps voltage supply circuit when the backup lamps are being commanded ON.

Action Taken When the DTC Sets

The backup lamps do not illuminate.

Conditions for Clearing the DTC

The BCM clears this code from current when the fault is removed from the system.

Circuit/System Verification

Ignition ON, place the PRNDL to the REVERSE position. The backup lamps should illuminate.

Circuit/System Testing

1. Place the PRNDL in to the PARK position. Disconnect both tail lamp assemblies and the inside rearview mirror. Clear the DTC. Using a test lamp connected to ground probe the backup lamps voltage supply circuit at one of the tail lamps.

• If the test lamp illuminates, test for a short to ground in backup lamps voltage supply circuit. If all circuits/connections test normal, replace the BCM.

2. Connect one of the tail lamp assemblies and test for the DTC. If the DTC resets, replace that tail lamp assembly.

• If tail lamps test normal, replace the inside rearview mirror.

Repair Instructions

Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.

* Tail Lamp Assembly Replacement
* Rearview Mirror Replacement
* Programming and Relearning for BCM setup, and programming. Programming and Relearning