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Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. If SIR diagnostic system check has been performed, go to next step. If SIR diagnostic system check has not been performed, go to SIR DIAGNOSTIC SYSTEM CHECK .
  2. Turn ignition off. If air bags have deployed, go to step  5. If air bags have not deployed, go to next step.
  3. Inspect front of vehicle and undercarriage for signs of impact. If impact has occurred, go to step  5. If no impact has occurred, go to next step.
  4. Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM)  under REMOVAL & INSTALLATION. Go to step  6.
  5. Using scan tool, request SIR DTC display. If history DTC exists, refer to Diagnostic Aids for displayed DTC. Replace components and perform inspections as required following an accident. See POST-COLLISION INSPECTION . Go to next step.
  6. Reconnect all SIR components. Using scan tool, clear all DTC's. Road test vehicle, then check for DTC's. If DTC is retrieved by scan tool, go to step  2. If DTC is not retrieved by scan tool, system is okay. Go to SIR DIAGNOSTIC SYSTEM CHECK .
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