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

DTC B096A

Make
Vauxhall
Model
Astra J
Section
Diagnostic Information and Procedures › Miscellaneous › DTC B096A
Body SystemsDTC B096A

DTC B096A

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 B096A 02: Hazard Lamps Switch Backlight Circuit Short to Ground

Diagnostic Fault Information



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

Hazard Lamp Switch Backlight Control
B096A 02
1
2
-

Ground
-
1
1
-

1. Hazard Lamp Switch Backlighting Inoperative

2. Hazard Lamp Switch Backlighting Always ON
 

Circuit/System Description

The body control module (BCM) supplies a pulse width modulated (PWM) voltage to the LED circuit of the hazard lamp switch for backlight.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The BCM detects a short to ground, or an open in the PWM circuit for the hazard lamp switch backlight LED circuit.

Action Taken When the DTC Sets

The BCM will not illuminate the LED backlighting supplied by the backlight lamp control circuit.

Conditions for Clearing the DTC

•  The condition responsible for setting the DTC no longer exists.
•  A history DTC will clear once 100 consecutive malfunction ignition cycles have occurred.

Reference Information


Schematic Reference

Exterior Lights Schematics


Connector End View Reference

Component Connector End Views


Description and Operation

Interior 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 LED Backlight Dimming test with a scan tool. The illumination should be ON/OFF.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the S26 Hazard Warning Switch.
2. Test for less than 5 Ω between the ground circuit terminal 7 and ground.
⇒ If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, headlamp switch ON, connect a test lamp between the backlight control circuit of S26 Hazard Warning Switch terminal 5 and ground.
⇒ If the test lamp does not illuminate, test the control circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the K9 Body Control Module.
⇒ 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.
4. If all circuits test normal, replace the S26 Hazard Warning Switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•  Control Module References for BCM replacement, programming and setup

Parts & tools for this job For Vauxhall Astra

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