B0052

DTC B0052

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

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 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 for 3 separate deployments.

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
DTC B0052 can be cleared if the following conditions are met.
^ Three consecutive seat belt 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 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

NOTE: 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]

Connector End View Reference
[SIR 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]

Scan Tool Reference
^ [Scan Tool Data List - SIR]
^ [Scan Tool Data Definitions - SIR]

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].

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 - Vehicle Diagnostic Information] after completing the diagnostic procedure.
^ [SIR/SRS Wiring Repairs]
^ [Control Module References] for SDM replacement, setup, and programming Programming and Relearning