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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 75 (Seat Belt System) >> Diagnostic Information and Procedures >> Seat Belt Indicator Circuit Malfunction - Driver >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.
    • The IPC
    • Left seat belt switch
    • Left seat belt switch harness connector
    • SDM
    • SDM harness connector
  1. Ignition OFF, disconnect the harness connector at the seat belt switch - left.
  2. Ignition ON, using a scan tool, verify the Driver Seat Belt Switch parameter in Supplemental Inflatable Restraints is Buckled.
    • If the parameter is Unbuckled, test the signal circuit for a short to ground. If the circuit tests normal replace the SDM.
  3. Install a 3-amp fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Driver Seat Belt Switch parameter is Unbuckled.
    • If the parameter is Buckled, test the signal and the low reference circuits for high resistance/open or a short to voltage. If the circuits test normal, replace the SDM.
  4. If all circuits test normal, test or replace the applicable seat belt switch - left.
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