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 driver side air bag inflation by side impact, the SDM maintains the warning lamp ON and then all the air bag systems should be inspected including pretensioners and also the side impact sensor, wiring should be replaced. If the driver side air bag inflation by side impact counts over 5, the SDM should also be replaced.

This diagnostic procedure supports the following DTC:

DTC B1651 Left Side Air Bag Deployment Commanded

Ignition voltage is within the normal operating voltage range.

The history of the air bag inflation or belt pretensioner explosion is in the SDM.

The SDM commands the AIR BAG indicator ON.

The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.