Buick Regal 1997-2000

Disarming the System

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CAUTION
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 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 many as 10 minutes after disconnecting the vehicle power by any of the following methods:



You turn OFF the ignition switch.
 
You remove the AIR BAG fuse (also identified as SIR or SDM fuse) that provides power to the SDM.
 
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.



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Fig. The air bag system fuse may be designated as AIR BAG , SIR or SDM fuse in the instrument panel fuse block



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Fig. Typical steering wheel electrical connections, including SIR Module leads



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Fig. Typical steering column electrical connections, including SIR Module leads



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Fig. Typical instrument panel (passenger side) air bag electrical connections



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Fig. Usually, these insulator panels must be removed to access the air bag connections

  1. Turn the steering wheel to the straight ahead position.
  2.  
  3. Turn the ignition switch to the OFF position and remove the key from the ignition switch.
  4.  
  5. Open the instrument panel fuse block access door. Locate and remove the AIR BAG fuse (it may also identified as SIR or SDM fuse, depending on the vehicle) from the instrument panel fuse block.
  6.  
  7. Remove the driver's side instrument panel insulator, a trim panel under the steering column. This normally requires a trim clip removal tool to detach the plastic panel retainers from the steering column opening filler panel. Disconnect the courtesy lamp, as required, by turning 1 / 4 turn counterclockwise.
  8.  
  9. On the driver's side, a yellow 2-way connector is located at the base of the steering column. First locate, then remove the Connector Position Assurance (CPA) pin. The CPA is a small wedge-shaped plastic piece designed to lock the connector together. With the CPA removed, detach the driver's side yellow 2-way connector.
  10.  
  11. To disable the passenger side instrument panel air bag, remove the instrument panel compartment door.
  12.  
  13. Remove the Connector Position Assurance (CPA) pin and separate the passenger's side yellow 2-way connector located behind the instrument panel door.
  14.  

  1. Turn the steering wheel to center the front wheels in the straight ahead position.
  2.  
  3. Turn the ignition switch to the OFF position and remove the key.
  4.  


NOTE
With the AIR BAG fuse removed, if, for some reason, the ignition switch is turned to the ON position, the AIR BAG warning lamp illuminates. This is normal operation and does not indicate an SIR system malfunction.



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Fig. Major SIR system component locations, including vehicles with side impact air bags



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Fig. SIR system connector locations, including vehicles with side impact air bag module-2000 vehicles



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Fig. SIR side impact air bag module location in the front seat-2000 vehicles

  1. Remove the instrument panel fuse block access door.
  2.  
  3. Remove the AIR BAG fuse (may also be identified as a numbered fuse or as the SIR or SDM fuse) from the fuse block.
  4.  
  5. Remove the left instrument panel insulator, the trim panel under the steering column.
  6.  
  7. Locate and remove the Connector Position Assurance (CPA) pin which locks the connector together, and separate the driver side yellow 2-way connector located at the base of the steering column.
  8.  
  9. Locate and remove the Connector Position Assurance (CPA) pin which locks the connector together, and separate the passenger side yellow 2-way connector located to the right of the steering column.
  10.  
  11. On vehicles equipped with a driver's side impact air bag, the air bag is built into the side of the seat facing the door. Move the driver's seat back as far as possible to gain access to the driver side air bag yellow 2-way connector. Detach the driver's side impact air bag yellow 2-way connector.
  12.  

 
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