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Service Precaution - SIR

CAUTION: Procedures must be followed in the order listed to temporarily disable the Supplemental Inflatable Restraint (SIR) System and prevent false diagnostic codes from setting. Failure to follow procedures could result in possible air bag deployment, personal injury or otherwise unneeded SIR system repairs.

CAUTION: Before removing or installing any electrical unit or when a tool or equipment could easily come in contact with "live" exposed electrical terminals, disconnect the negative battery cable to help prevent personal injury and/or damage to the vehicle or components. Unless Instructed otherwise, the Ignition switch must be In the "off" or "lock" position.

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

The DERM in 1993 and previous Driver-Only SIR systems can maintain sufficient voltage to cause a deployment for up to 10 minutes after the ignition switch is turned " OFF ", the battery is disconnected or the fuse powering the DERM is removed.

The DERM in 1994 and later Driver-Only and the DERM in all Driver-Passenger SIR systems can maintain sufficient voltage to cause a deployment for up to 2 minutes after the ignition switch is turned "OFF", the battery is disconnected or the fuse powering the DERM is removed.

Many of the service procedures require removal of the AIR BAG fuse, and the disconnection of the inflator module from the deployment loop to avoid an accidental deployment. If the inflator module is disconnected from the deployment loop as noted in the "Disabling the SIR System" procedure that follows, service can begin immediately without waiting for the 10 minute or 2 minute time period to expire.


NOTICE: When fasteners are removed, always reinstall them at the same location from which they were removed. If a fastener needs to be replaced, use the correct part number fastener for that application. If the correct part number fastener is not available, a fastener of equal size and strength (or stronger) may be used. Fasteners that are not reused, and those requiring thread locking compound will be called out. The correct torque value must be used when installing fasteners that require it. If the above conditions are not followed, parts or system damage could result.
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