The inflatable restraint sensing and diagnostic module (SDM) contains sensing devices that convert vehicle velocity changes to electrical signals. The SDM processes the generated electrical signals and compares them to values stored in memory. When the generated signals exceed the stored values, the SDM performs additional signal processing and compares the generated signals to signals 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 inflator modules. DTC B0053 will set along with DTC B0051 when a deployment occurs while a circuit malfunction is present in any one of the deployment loops.

Ignition 1 voltage is within the normal operating voltage range.

The DTC will set when the SDM detects a frontal crash, up to 30 degrees off the centerline of the vehicle, of sufficient force to warrant deployment of the inflator modules.

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 and DTC B0051). 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. Tests for inflator module(s) deployment. If the inflator module(s) did not deploy, DTC B0053 may have set falsely.

3. Tests for signs of impact or collision. If there are no signs of impact or collision, DTC B0053 may have set falsely.