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.

In case of the belt pretensioner explosion without front air bag inflation due to insufficient impact, replace the exploded belt pretensioner and remove the defect code using the 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.