B0053

Diagnostic Chart:

CIRCUIT DESCRIPTION

Schematic:

The SDM contains a sensing device that converts vehicle velocity changes to an electrical signal. The electrical signal is generated by the SDM and compared to a value stored in memory. When the generated signals exceed the stored values, the SDM deploys the air bags and stores a DTC in its memory. If a deployment occurs while an inflator circuit fault is present this DTC will be set.

DTC PARAMETERS:
DTC B0053 sets when the SDM commands the inflator modules to deploy air bags with a loop fault present. The following conditions must be met to set this DTC.
- Ignition voltage is present at the SDM and continuous.
- An inflator loop fault was previously detected.
- The SDM detects a frontal crash, up to 30 degrees of the vehicle centerline.
- Crash was of sufficient force to warrant deployment of air bags.

ACTION TAKEN:
- DTC B0053 will set.
- The air bag telltale will be On.
- DTC is latched in SDM memory.

DIAGNOSTIC AIDS:
- Always start diagnosis of SIR DTCs with an inspection of vehicle, including its wiring and SIR components for visible damage.
- Always replace SDMs with DTC B0053 set, only after all collision repairs have been completed.

IMPORTANT: DTC E0053 is a latched code and can not be cleared from SDMs memory.

- Always perform the "SIR Diagnostic System Check" before using this chart.