Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC B2545 00: Backup Lamps CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Back Up Lamps Control | B2545 00 | 1 | 2 | -- |
1. Backup Lamps Inoperative 2. Backup Lamps Always On | ||||
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 control circuit to the back up lamps. The back up lamps are grounded through G401.
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The back up lamps must be commanded ON. |
Conditions for Setting the DTC
The BCM detects a short to ground on the back up lamp control circuit when the back up lamps are being commanded ON.
Action Taken When the DTC Sets
The back up lamps do not illuminate.
Conditions for Clearing the DTC
| • | The conditions for setting the DTC are no longer present. |
| • | A history DTC clears after 100 malfunction-free ignition cycles. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Exterior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, command the Backup Lamps ON with a scan tool. The Backup Lamps parameter should display On and the backup lamps should illuminate.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the left back up lamp.
- Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal listed below and B+:
- If all circuits test normal, replace the BCM.
| • | RPO WDA -- terminal 1 |
| • | RPO Z88 -- terminal 2 |
| • | RPO W49 -- terminal A |
| ⇒ | If the test lamp illuminates, test the control circuit for a short to ground. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM replacement, setup, and programming
