Workshop Manuals Factory service & repair Vauxhall
Vauxhall Astra J15 · Safety and Security
15 · General

DTC B0051

Make
Vauxhall
Model
Astra J
Section
Supplemental Inflatable Restraints › Other Information › DTC B0051
Safety and SecurityDTC B0051

DTC B0051

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 B0051 01: Battery Cut-Off Deployment Loop Short to Battery
DTC B0051 02: Battery Cut-Off Deployment Loop Short to Ground
DTC B0051 04: Battery Cut-Off Deployment Loop Open Circuit
DTC B0051 0D: Battery Cut-Off Deployment Loop High Resistance
DTC B0051 0E: Battery Cut-Off Deployment Loop Low Resistance

Circuit/System Description

The inflatable restraint sensing and diagnostic module (SDM) contains sensing devices that converts vehicle velocity changes to electrical signals. The SDM processes the generated electrical signals and compares them to values stored in memory. When the generated signals exceed the stored values, the SDM performs additional signal processing and compares the generated signals to signals stored in memory. When 2 of the generated signals exceed the stored values, the SDM will cause current to flow through the inflator modules, deploying the inflator modules, and causing DTC B0051 to set.

Conditions for Running the DTC

Ignition voltage is between 9-16 V.

Conditions for Setting the DTC

•  The SDM detects a frontal impact of sufficient force to warrant deployment of the driver and passenger frontal air bags.
•  The SDM detects a side impact of sufficient force to warrant deployment of side air bags.

Action Taken When the DTC Sets

•  The SDM requests the instrument cluster to illuminate the AIR BAG indicator.
•  The SDM records crash data.

Conditions for Clearing the DTC

DTC B0051 is a latched code. You cannot clear a latched code. Replace the SDM after following the instructions.

Reference Information


Schematic Reference

SIR Schematics


Connector End View Reference

Component Connector End Views


Description and Operation

SIR System Description and Operation


Electrical Information Reference


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Verify DTC B0051 is not set.
    ⇒  DTC B0051 is set

⇒ Replace the K36 SDM.
    ⇓  DTC B0051 is not set

2. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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

Parts & tools for this job For Vauxhall Astra

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