- Disabling/Enabling the SIR System

This article has been updated with TSB # 563201.


WARNING:
- When performing service on or around SIR components or SIR wiring, follow the procedures listed below to temporarily disable the SIR system. Failure to follow procedures could result in possible air bag deployment, personal Injury, or otherwise unneeded SIR system repairs.

- The DERM can maintain sufficient voltage to cause a deployment for up to 2 minutes after the ignition switch is turned "OFF" or the battery is disconnected. Many of the service procedures require disconnection of the "AIR BAG" fuse and the inflator module circuits from the deployment loops to avoid an accidental deployment.

REMOVAL

NOTE:
- Turn the steering wheel so that the vehicle's wheels are pointing straight ahead.
- Turn the ignition switch to "LOCK" and remove key.

Remove or disconnect the following:
1. "AIR BAG" fuse from I/P fuse block.
2. Knee bolster..
3. Connector position assurance (CPA) retainer and yellow 2-way SIR connector at base of steering column.

NOTE: With the "AIR BAG" fuse removed and ignition switch "ON", the "AIR BAG" warning lamp will be "ON". This is normal operation and does not indicate an SIR system malfunction.

INSTALLATION
Install or connect the following:
- Turn the ignition switch to "LOCK" and remove key.
1. Yellow 2-way SIR connector and CPA retainer at base of steering column.
2. Knee bolster.
3. "AIR BAG" fuse to I/P fuse block.
- Staying well away from inflator module, turn ignition switch to "RUN" and verify that the "AIR BAG" warning lamp flashes 7 times and then turns "OFF". If it does not operate as described, perform the "SIR Diagnostic System Check".