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Circuit/System Testing

NOTE:

When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

  • Driver seat belt switch
  • SDM
  • Driver seat belt switch wiring harness connector
  • SDM wiring harness connector
  1. Ignition OFF, disconnect the harness connector at the driver seat belt switch.
  2. Test for less than 1.0 Ω between low reference terminal 2 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the SDM.
  3. Ignition ON, with the driver seat belt unbuckled, verify the scan tool Drive Seat Belt Status parameter displays Unbuckled.
    • If not the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the SDM.
  4. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool Driver Seat Belt Switch parameter displays Buckled.
    • If not the specified value, test the signal circuit for short to voltage or an open/high resistance. If the circuit tests normal, replace the SDM.
  5. If the circuit tests normal, replace the driver seat belt switch.
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