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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Supplemental Inflatable Restraint Systems) >> Diagnostic Tests >> DTC B0091: Active Switch: Wrong State >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2000 Chevrolet Corvette. 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. Install scan tool. Turn ignition off. Use scan tool to observe SIR suppression switch active switch data in SDM data list. If scan tool indicates that PSIR suppression switch is disabled, go to next step. If scan tool indicates that PSIR suppression switch is not disabled, go to step  6 .
  3. Turn PSIR suppression switch on and then turn PSIR suppression switch off. Use scan tool to observe PSIR suppression switch active switch data in SDM data list. If switch data changes between on and off, go to next step. If switch data does not change, go to step  6 .
  4. If LED illuminates in air bag LED module when PSIR suppression switch is set to off position, go to step  6 . If LED does not illuminate, go to next step.
  5. Turn ignition off. Inspect for LED module harness connector for poor connections. If connection problems are found, correct condition and go to step  12 . If no connection problems are found, go to next step.
  6. Turn ignition off. Disconnect PSIR suppression switch connector from PSIR suppression switch. Turn ignition on. Use scan tool to observe PSIR suppression switch active switch data parameter. If scan tool indicates that PSIR suppression switch is disabled, go to next step. If scan tool does not indicate that PSIR suppression switch is disabled, go to step  8 .
  7. Inspect PSIR suppression switch harness connector for damage. If damage is found, correct condition and go to step  12 . If no damage is found, go to step  10 .
  8. Disconnect SDM harness connector. Using Digital Multimeter (J-39200), measure resistance between terminals "A" and "E" of PSIR suppression switch connector. See Figure . If resistance is not infinite, repair short and go to step  12 . If resistance is infinite, go to next step.
  9. Inspect SDM harness connector for corrosion, damaged terminals or poor connections. If damage is found, correct condition and go to step  12 . If no damage is found go to step  11 .
  10. Replace PSIR suppression switch. See PASSENGER SIR (PSIR) SUPPRESSION SWITCH  under REMOVAL & INSTALLATION.
  11. Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM)  under REMOVAL & INSTALLATION.Go to next step.
  12. Reconnect all SIR components. Ensure that all components are properly mounted. Go to SIR DIAGNOSTIC SYSTEM CHECK  .
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