The inflatable restraint sensing and diagnostic module (SDM) contains a sensing device (accelerometer) that convert vehicle velocity changes to an electrical signal. The SDM processes the generated electrical signal and compares it 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 two of the generated signals exceed the stored values, the SDM will cause current to flow through the inflator modules, deploying the air bags. DTC B0053 will set along with a DTC B0051 when a deployment occurs while an inflator circuit fault is present that could possibly result in a non-deployment situation in one or more inflator modules.

Ignition voltage must be present to the SDM.

The SDM detects a frontal crash, up to 30 degrees off the centerline of the vehicle, of sufficient force to warrant deployment of the frontal air bags.

DTC B0053 is a latched code. You cannot clear a latched code. Replace the SDM after following the instructions in the diagnostic table.

DTC B0053 will be accompanied by another DTC (other than DTC B1000). Repair the malfunction causing the other DTCs before installing a new SDM.

The numbers below refer to the step numbers on the diagnostic table:

2. If the inflator module(s) has not deployed, DTC B0053 may have set falsely.

3. If DTC B0053 has set with no signs of frontal impact, the DTC may have set falsely.