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Diagnostic Procedure

WARNING: This page is about a different car, the 2002 GMC Savana and 2002 Chevrolet Chevy Express. 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. Observe AIR BAG warning light while turning ignition on. If AIR BAG warning light comes on, go to DIAGNOSTIC AIDS . If AIR BAG warning light does not come on, go to next step.
    NOTE: Use Digital Multimeter (J-39200) and Connector Test Adapter Kit (J-35616-A) or Flat Wire Probe Adapter Kit (J-42675) when performing electrical tests.
  3. Turn ignition off. Disable SIR system. See DISABLING & ACTIVATING AIR BAG SYSTEM . Disconnect SDM connector. Connect a 3 amp fused jumper wire between SDM connector terminal A9 and ground. Turn ignition on. If AIR BAG warning light does not come on, go to next step. If AIR BAG warning light comes on, go to step  5.
  4. Turn ignition off. Measure resistance of Brown wire between SDM connector terminal A9 and AIR BAG warning light connector A16. If an open or high resistance is found and corrected, go to step  9. If an open or high resistance is not found, go to step  6.
  5. Turn ignition off. Remove 3 amp fused jumper wire from SDM connector. If SDM connector shows signs of corrosion, poor connections or damage, replace SDM connector. See WIRE REPAIR . Go to step  9. If SDM connector is okay, go to step  7.
  6. Disconnect Instrument Panel Cluster (IPC) connector. See INSTRUMENT PANEL CLUSTER (IPC)  under REMOVAL & INSTALLATION. If IPC connector shows signs of corrosion, poor connections or damage, replace connector. Go to step  9. If IPC connector is okay, go to step  8.
  7. Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM)  under REMOVAL & INSTALLATION. Go to step  9.
  8. Repair or replace Instrument Panel Cluster (IPC). Go to next step.
  9. Reconnect all SIR system components. Ensure that all components are properly mounted. Go to SIR DIAGNOSTIC SYSTEM CHECK .
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