B0052

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
- Deployment Commanded

DTC B0053
- Deployment Commanded with Loop DTCs Present

Circuit/System Description

The inflatable restraint sensing and diagnostic module (SDM) contains a sensing 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 2 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 air bags and/or roof rail air bags.
* The SDM has deployed the seat belt retractor pretensioner for 3 separate deployments.

B0053

SDM commands deployment with loop faults present.

Action Taken When the DTC Sets

* The SDM will only set DTC B0052 or the SDM sets DTC B0053 along with DTC B0052.
* The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
* The SDM records crash data.

Conditions for Clearing the DTC

DTC B0052 can be cleared if the following conditions are met.

* Three consecutive seat belt retractor pretensioner deployment events have not occurred.
* One frontal or side air bag deployment has not occurred.

DTC B0052 becomes a latched code after 3 consecutive retractor pretensioner deployments or 1 frontal or side air bag deployment. You cannot clear a latched code. Replace the SDM after following the instructions in the diagnostic table.

Diagnostic Aids

Important: The seat belt 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 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.


When DTC B0053 is accompanied by additional DTCs, other than B0052, repair the malfunction causing the other DTCs before replacing SDM.

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 (Description and Operation)
Electrical Information Reference

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

Scan Tool Reference

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

Circuit/System Verification

1. Ignition OFF, inspect the vehicle for signs of air bag or pretensioner deployment. Verify that the vehicle does not show any signs of deployment.

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

2. Verify DTC B0052 is not reset.

• If DTC is set, with a scan tool, clear DTCs. If the DTC resets, replace the SDM.

Repair Instructions

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

* SIR/SRS Wiring Repairs (SIR/SRS Wiring Repairs)
* Control Module References (Programming and Relearning)for SDM replacement, setup, and programming