B0055

DTC B0055

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* 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

* 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. You cannot clear a latched code. Replace the SDM after following the instructions in the diagnostic table.

Circuit/System Testing

1. Ignition OFF, inspect the vehicle for signs of side impact or frontal inflator module deployment.
Verify that the vehicle does not show any signs of inflator deployment.

• If the vehicle displays any signs of inflator deployment, Refer to Repairs and Inspections Required After a Collision.

2. Use a scan tool and observe the SIR DTC display. Refer to Diagnostic Trouble Code (DTC) List - Vehicle. The scan tool should indicate DTC B0055 is not set. Diagnostic Trouble Code Descriptions

• If DTC B0055 is set, replace the SDM.

Repair Instructions

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

Programming and Relearning Programming and Relearning