Disabling the SIR System

The diagnostic energy reserve module or sensing and diagnostic module (DERM/SDM) can maintain enough voltage to cause air bag deployment for up to two minutes after the ignition switch is turned off and the battery is disconnected. Servicing the SIR system during this period may result in accidental deployment and personal injury.


1. Ensure front wheels are pointed straight ahead.
2. Turn ignition switch to LOCK position and remove key.
3. Remove left hand sound insulator from under steering column.
4. Remove CPA and disconnect yellow 2-way connector at base of steering column, then working through trap door in glove compartment, remove CPA and disconnect yellow 2-way connector from passenger's inflator module pigtail.
5 Wait at least 2 minutes before proceeding with diagnosis or service.