Circuit/System Testing
WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
- The IPC
- Driver seat belt switch
- Driver seat belt switch harness connector
- SDM
- SDM harness connector
- Ignition OFF, disconnect the harness connector at the driver seat belt switch.
- 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.
- 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.
- If all circuits test normal, test or replace the driver seat belt switch.
IMPORTANT:
When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.