Circuit/System Testing
WARNING: This page is about a different car, the 2011 GMC Acadia, 2011 Chevrolet Traverse, and 2011 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the ambient light sensor.
- Ignition OFF, scan tool disconnected, ALL doors closed, test for less than 10 Ω between the ground circuit terminal listed below and ground.
- Terminal B (with C67)
- Terminal C (with CJ2)
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify the scan tool Ambient Light Sensor parameter is greater than 4.65 volts.
- If less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the BCM.
- Install a 3 A fused jumper wire between the signal circuit terminal and the ground circuit terminal listed below. Verify the scan tool Ambient Light Sensor parameter is less than 0.196 V.
- Terminal A and terminal B (with C67)
- Terminal D and terminal C (with CJ2)
- If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
- If all circuits test normal, replace the ambient light sensor.