DTC B100D-64: Column Lock Authorization - Signal plausibility 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.

NOTE: Prior to clearing this DTC, perform the Vehicle Functional Reset routine

Using JLR approved diagnostic equipment, perform a CAN network integrity test. Refer to the appropriate system wiring diagrams and check the high speed CAN bus (body) circuit for short circuit to ground, short circuit to power, open circuit, high resistance
Using JLR approved diagnostic equipment, check the anti-lock brake system control module for related DTCs and refer to the relevant DTC index
Using JLR approved diagnostic equipment, check the central junction box for related DTCs and refer to the relevant DTC index