Express 1/2 Ton Van V8-305 5.0L VIN M SFI (1998)
Air Bag(s) Arming and Disarming: Service and Repair
General Service Precautions
CAUTION: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Use the
following procedure to temporarily disable the SIR system. Failure to follow the correct procedure could cause air bag deployment, personal
injury, or unnecessary SIR system repairs.
The inflatable restraint Sensing and Diagnostic Module (SDM) maintains a reserve energy supply. When the vehicle power is insufficient to cause
deployment of the air bags, the reserve energy supply provides the deployment power. Deployment power is available for as much as 10 minutes after
disconnecting the vehicle power by any of the following methods:
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You turn the ignition switch to the OFF position.
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You remove the fuse that provides power to the SDM.
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You disconnect the vehicle battery from the vehicle electrical system.
Performing the following procedure prevents deploying of the air bags from the reserve energy supply power.
