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DTC 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


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs

• SIR/SRS Wiring Repairs


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Verify DTC B0051 is not set.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• SIR/SRS Wiring Repairs

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