For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category

### 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

• | The SDM detects a frontal impact of sufficient force to warrant deployment of the frontal inflator modules.

• | The SDM detects a side impact of sufficient force to warrant deployment of a side inflator module and/or roof rail module.

### Action Taken When the DTC Sets

• | 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 B0055 is a latched code and cannot be cleared.

### Reference Information

#### Schematic Reference

SIR Schematics

#### Connector End View Reference

Component Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

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. Verify DTC B0055 is not set.

⇒ | If DTC B0055 is set, replace the SDM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for SDM replacement, setup, and programming