Workshop Manuals Factory service & repair Vauxhall
Vauxhall Astra J05 · Body Systems
05 · Body & interior

DTC B2545

Make
Vauxhall
Model
Astra J
Section
Lighting › Other Information › DTC B2545
Body SystemsDTC B2545

DTC B2545

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 Descriptors

DTC B2545 02: Backup Lamps Circuit Short to Ground
DTC B2545 04: Backup Lamps Circuit Open

Diagnostic Fault Information



Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance

Backup Lamps Control
B2545 02
B2545 04
1
-

1. Backup lamp always ON
 

Circuit/System Description

When the transmission is placed in reverse gear, the engine control module (ECM) sends a serial data message to the body control module (BCM). The message indicates that the gear selector is in the reverse position. The BCM applies battery voltage to the backup lamps. The backup lamps are permanently grounded. Once the driver moves the gear selector out of the reverse position, a message is sent by the ECM via serial data requesting the BCM to remove battery voltage from the backup lamp control circuit.

Conditions for Running the DTC

Reverse gear engaged

Conditions for Setting the DTC

B2545 02

The BCM detects a short to ground on the control circuit.

B2545 04

The BCM detects an open control circuit.

Action Taken When the DTC Sets

The appropriate backup lamp is inoperative.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Reference Information


Schematic Reference

Exterior Lights Schematics


Connector End View Reference

Component Connector End Views


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, perform the Backup Lamps test. The backup lamps should be ON/OFF.

Circuit/System Testing

1. Ignition OFF, disconnect the appropriate harness connector at the appropriate tail lamp listed below:
  •  E43L Liftgate Tail Lamp Assembly - Left
  •  E43R Liftgate Tail Lamp Assembly - Right
2. Test for less than 5 Ω between the appropriate ground circuit harness connector terminal listed below and ground:
  •  E43L Liftgate Tail Lamp Assembly - Left harness connector terminal 3
  •  E43R Liftgate Tail Lamp Assembly - Right harness connector terminal 2
⇒  If greater than the specified value, test the appropriate ground circuit for an open/high resistance.
3. Connect a test lamp between the appropriate control circuit harness connector terminal listed below and ground:
  •  E43L Liftgate Tail Lamp Assembly - Left harness connector terminal 4
  •  E43R Liftgate Tail Lamp Assembly - Right harness connector terminal 1
4. Command the Backup Lamps test with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
⇒ If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.
⇒ If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the K9 Body Control Module.
5. If all circuits test normal, replace the appropriate backup lamp .

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•  Control Module References for BCM replacement, setup, and programming

Parts & tools for this job For Vauxhall Astra

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