B0055

DTC B0055

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 Descriptor

DTC B0055 00 Side Airbag Deployment Commanded

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 inflator modules, deploying the side air bags and causing DTC B0055 to set. This DTC is set when the SDM has commanded an air bag deployment with no faults present.

Conditions for Running the DTC
Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC
^ This SDM detects a frontal crash of sufficient force to warrant deployment of the frontal inflator modules.
^ The SDM detects a side impact crash of sufficient force to warrant deployment of a side inflator module.

Action Taken When the DTC Sets
^ The SDM sets a DTC.
^ DTC B0052 or B0053 will set.
^ The SDM commands ON the AIR BAG warning lamp via serial data communications.
^ The SDM records crash data.

Conditions for Clearing the DTC
DTC B0055 is a latched code and cannot be cleared.

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 Testing
1. Ignition OFF, Verify that the vehicle does not show any signs of side impact or frontal inflator module deployment.
^ If the vehicle displays any signs of inflator deployment, refer to [Repairs and Inspections Required After a Collision].

2. With a scan tool verify DTC B0055 is not set.
^ If DTC B0055 is set, 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