Circuit/System Verification
WARNING: This page is about a different car, the 2018 GMC Canyon and 2018 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON/Vehicle in Service Mode.
- Verify no other DTC is not set.
- If other DTC is set
- Go to next step: If no other DTCs are set
- Verify Rear Vision Camera Display operates properly. Refer to Rear Vision Camera System Malfunction (with IOB) Rear Vision Camera System Malfunction (with IO5/IO6)
- Engine running, parking brake applied, transmission in R.
- Verify the scan tool BCM Backup Lamps Relay Command parameter is Active.
- If Backup Lamps Relay Command parameter is not Active
Test or replace the K9 Body Control Module.
- Go to next step: If Backup Lamps Relay Command parameter is Active
- If Backup Lamps Relay Command parameter is not Active
- Test or replace the K74 Human Machine Interface Control Module.
NOTE:
A clear rear vision image is an image that is free of flickering, blinking, excessive blue/yellow hue, and/or blurriness/pixilation such that it obstructs the drivers view out the rear of the vehicle.