B0053

DTC B0052 or B0053

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptors
DTC B0052 00
- Deployment Commanded

Circuit/System Description

The inflatable restraint sensing and diagnostic module (SDM) contains a device that converts vehicle velocity changes into an electrical signal. The SDM compares this electrical signal to a value stored in memory. When the generated signal exceeds the stored value, the SDM performs additional signal processing and compares the generated signals to values stored in memory. When two of the generated signals exceed the stored values, the SDM will cause current to flow through the deployment loops, deploying the air bags and/or pretensioners causing DTC B0052 to set.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B0052
* The SDM detects a frontal impact of sufficient force to warrant deployment of the frontal air bags.
* The SDM detects a side impact of sufficient force to warrant deployment of a side impact air bag and/or roof rail air bag.
* The SDM has deployed the seat belt buckle pretensioner for 3 separate deployments.

Action Taken When the DTC Sets

* The SDM requests the instrument panel cluster (IPC) to illuminate the Service Air Bag indicator.
* The SDM records crash data.

Conditions for Clearing the DTC

After an air bag deployment or 3 separate buckle pretensioner deployments the DTC becomes latched and cannot be cleared.

Reference Information
Schematic Reference

SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

SIR System Description and Operation (SIR System)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

Important: The seat belt buckle pretensioners may deploy for impacts that are not severe enough to warrant frontal or side air bag deployment. The SDM is capable of sustaining 3 buckle pretensioner deployment events, or one frontal or side deployment event. After the maximum number of deployments has occurred, DTC B0052 sets and becomes a latched code, which cannot be cleared.


1. Ignition OFF, verify no signs of air bag or pretensioner deployment exist.

• If any signs of deployment exist, refer to Repairs and Inspections Required After a Collision (Supplemental Inflatable Restraints).

2. Verify DTC B0052 is not set.

• If DTC B0052 is set, clear DTCs. If the DTC sets, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

Refer to Control Module References (Programming and Relearning) for SDM replacement, setup, and programming