Diagnostic Procedure

2000 Saturn LS AutomaticSECTION Diagnostic Procedure
  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. Disconnect passenger-side air bag Yellow 2-pin connector located under upper trim panel. See Figure. If harness connector is damaged or corroded, go to next step. If harness connector is okay, go to step  4.
  3. Replace the passenger-side air bag Yellow 2-pin connector. Go to step  11.
  4. Turn ignition off. Install SIR Driver/Passenger Load Tool (SA9409-Z) to passenger-side air bag harness connector. Turn ignition on. Using scan tool, check for SIR DTCs. If DTC B0017 is set, go to next step. If DTC B0017 is not set, go to step  10.
  5. Turn ignition off. Remove SIR Driver/Passenger Load Tool (SA9409-Z) from harness connector. Disconnect SDM harness connector. See Figure. Measure resistance between SDM harness connector terminal No. A3 and passenger-side air bag harness connector terminal "A". See Figure & Figure . If resistance is one ohm or less, go to step  7. If resistance is more than one ohm, go to next step.
  6. Repair open or high resistance in circuit 1403. Go to step  11.
  7. Measure resistance between SDM harness connector terminal No. A8 and passenger-side air bag harness connector terminal "B". If resistance is one ohm or less, go to step  9. If resistance is more than one ohm, go to next step.
  8. Repair open or high resistance in circuit 1404. Go to step  11.
  9. Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM)  under REMOVAL & INSTALLATION. Go to step  11.
  10. Replace passenger-side air bag. See AIR BAG MODULES  under REMOVAL & INSTALLATION. Go to next step.
  11. 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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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.