B0053

DTC B0052 or B0053

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview)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 or B0053 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 modules.
* The SDM detects a side impact of sufficient force to warrant deployment of a side impact module and/or roof rail module.
* The SDM has deployed the seat belt pretensioner.


B0053

SDM commands inflators 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 commands the AIR BAG warning lamp ON via serial data communications.
* The SDM records crash data.



Conditions for Clearing the DTC

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


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 Views)
Description and Operation

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

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

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


Circuit/System Verification

1. Ignition OFF, verify no signs of inflator module or pretensioner deployment exist.

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

2. With a scan tool, verify DTC B0052 or DTC B0053 is not set.

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




Repair Instructions

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

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