DTC C1B18-62: Module Power Supplies - Signal compare failure: Action
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, 2016 Land Rover Range Rover, 2015 Land Rover Range Rover, and 2014 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
- Check the module connector(s) for security and integrity. Rectify as required
- Refer to the appropriate system wiring diagram and check the power supply circuit(s) to the module for short circuit to ground, high resistance. Repair circuit(s) as required, clear the DTCs and retest