Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the DIC switch assembly.
- Verify all of the scan tool DIC Switch parameters except the TRIP/FUEL parameter are Inactive.
- If not Inactive, replace the IPC.
- Ignition ON, install a 3-amp fused jumper wire between the signal circuit and ground. Verify all of the scan tool DIC Switch parameters except the TRIP/FUEL parameter are Active.
- If not Active, test the signal circuit of the DIC switch assembly for a short to voltage. If the circuit tests normal, replace the IPC.
- If all circuits test normal, test or replace the DIC switch assembly.