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Diagnostic Procedure

WARNING: This page is about a different car, the 2000 Buick Park Avenue. 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. Disconnect passenger side impact air bag Yellow 2-pin connector under passenger seat. See Figure. Check terminals for corrosion, damage and poor connections. If damage is evident, go to next step. If damage is not evident, go to step  4.
  3. Replace harness. Go to step  14.
  4. Reconnect passenger side impact air bag Yellow 2-pin connector. Ensure CPA clip is installed correctly. Turn ignition on. Using scan tool, check for SIR DTCs. If DTC B0029 is retrieved, go to next step. If DTC B0029 is not retrieved, see DIAGNOSTIC AIDS.
  5. Turn ignition off. Disconnect passenger side impact air bag Yellow 2-pin connector under passenger seat. See Figure. Install SIR Driver/Passenger Load Tool (J-38715-A) to harness side of connector. Turn ignition on. Using scan tool, check for SIR DTCs. If DTC B0029 is retrieved, go to step  7. If DTC B0029 is not retrieved, go to next step.
  6. Turn ignition off. Replace passenger side impact air bag module. See AIR BAG MODULES  under REMOVAL & INSTALLATION. Go to step  14.
  7. Turn ignition off. Remove SIR Driver/Passenger Load Tool (J-38715-A) from harness connector. Disconnect SDM harness connector. Inspect SDM terminals No. B3 and B4 for proper connections. If connections are okay, go to step  9. If connections are not okay, go to next step.
  8. Replace or repair SDM harness connector. Go to step  14.
  9. Using Digital Multimeter (J-39200), measure resistance of passenger side frontal high circuit 2103 between SDM harness connector terminal No. B4 and terminal "A" of passenger-side air bag 2-pin Yellow connector. See Figure & Figure . If resistance is less than 0.5 ohms, go to step  11. If resistance is 0.5 ohms or more, go to next step.
  10. Repair open or high resistance condition in circuit 2103. Go to step  14.
  11. Using Digital Multimeter (J-39200), measure resistance of passenger side low circuit 2104 between SDM harness connector terminal No. B3 and terminal "B" of passenger-side air bag 2-pin Yellow connector. See Figure & Figure . If resistance is less than 0.5 ohms, go to step  13. If resistance is 0.5 ohms or more, go to next step.
  12. Repair open or high resistance condition in circuit 2104. Go to step  14.
  13. Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM)  under REMOVAL & INSTALLATION. Go to next step.
  14. Reconnect all SIR components. Ensure that all components are properly mounted. Clear all SIR DTCs. Go to SIR DIAGNOSTIC SYSTEM CHECK .
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