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Home >> Saturn >> 2001 >> SW2 Automatic >> Repair and Diagnosis (Single Page) >> Restraints >> Air Bag, SRS >> Air Bag Restraint Systems >> Diagnostic Tests >> DTC B0078: Passenger Sis Malfunction >> Diagnostic Procedure

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 SDM connector. Check connector terminals for signs of corrosion, poor connection or other damage. If connector is okay, go to next step. If connector is damaged, replace connector. See WIRE REPAIR . Go to step  14.
  3. Using Digital Multimeter (SA911141NE) with Adapter Kit (SA9206Z), measure resistance between SDM harness connector terminals B7 and B8. If resistance is infinite, go to next step. If resistance is not infinite, go to step  11.
  4. Turn ignition on. Using Digital Multimeter (SA911141NE) with Adapter Kit (SA9206Z), measure voltage between SDM terminal B8 and ground. If voltage is less than one volt, go to next step. If voltage is one volt or more, go to step  11.
  5. Using Digital Multimeter (SA911141NE) with Adapter Kit (SA9206Z), measure voltage between SDM terminal B7 and ground. If voltage is less than one volt, go to next step. If voltage is one volt or more, go to step  11.
  6. Turn ignition off. Using Digital Multimeter (SA911141NE) with Adapter Kit (SA9206Z), measure resistance between SDM harness connector terminal B8 and ground. If resistance is infinite, go to next step. If resistance is not infinite, go to step  11.
  7. Using Digital Multimeter (SA911141NE) with Adapter Kit (SA9206Z), measure resistance between SDM harness connector terminal B7 and ground. If resistance is infinite, go to next step. If resistance is not infinite, go to step  11.
  8. Disconnect SIS connector. Using Digital Multimeter (SA911141NE) with Adapter Kit (SA9206Z), measure resistance between SDM harness connector terminal B8 and SIS harness connector terminal "B". If resistance is less than 3 ohms, go to next step. If resistance is 3 ohms or more, go to step  10.
  9. Using Digital Multimeter (SA911141NE) with Adapter Kit (SA9206Z), measure resistance between SDM harness connector terminal B7 and SIS harness connector terminal "A". If resistance is 3 ohms or more, go to next step. If resistance is less than 3 ohms, go to step  12.
  10. Repair open circuit. See WIRE REPAIR . Go to step  14.
  11. Disconnect SIS. If condition is no longer present, go to next step. If condition is still present, go to step  13.
  12. Replace SIS. See SIDE IMPACT SENSOR (SIS)  under REMOVAL & INSTALLATION. Go to step  14.
  13. Turn ignition off. Repair circuits that are shorted to each other, to voltage or to ground. See WIRE REPAIR . Go to next step.
  14. Reconnect all SIR components. Ensure that all components are properly mounted. Using scan tool, clear all SIR DTCs. Go to SIR DIAGNOSTIC SYSTEM CHECK .
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