Circuit/System Testing
WARNING: This page is about a different car, the 2007 Chevrolet Monte Carlo and 2007 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the HVAC control head. Verify the DTC resets.
- If the DTC does not reset, replace the HVAC control head.
- Disconnect the radio. Verify the DTC resets.
- If the DTC does not reset, replace the radio.
- Disconnect the DIC switch. Verify the DTC resets.
- If the DTC does not reset, replace the DIC switch.
- Disconnect the cruise control switch. Verify the DTC resets.
- If the DTC does not reset, replace the cruise control switch.
- Disconnect the steering wheel control switches. Verify the DTC resets.
- If the DTC does not reset, replace the steering wheel control switches.
- Test for a short to ground in the LED Dimming Supply circuit.
- If all circuits/connections test normal, replace the BCM.