When the ignition switch is turned to ON, the sensing and diagnostic module (SDM) will perform a turn-on test to diagnose critical malfunctions within the SDM itself.

If belt pretensioner explosion, without front air bag inflation, was due to insufficient impact, replace the exploded belt pretensioner and remove the defect code using a scan tool. If the belt pretensioner explosion counts over 5, the SDM should also be replaced.

The history of the belt pretensioner explosion is in the SDM.

Caution: Refer to Sensing and Diagnostic Module Voltage after Ignition is Turned Off Caution in the Preface section.

Caution: Refer to Sensing and Diagnostic Module Handling Caution in the Preface section.