DTC U300A-62: Ignition Switch - Signal compare failure: Action

WARNING: This page is about a different car, the 2023 Jaguar F-Pace and 2022 Jaguar F-Pace. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Do NOT replace the anti-lock brake system control module for this fault only

Refer to the electrical circuit diagrams and check the anti-lock brake system control module ignition wake-up line for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as required
Using the Jaguar Land Rover approved diagnostic equipment, check datalogger signal - (0x214E), Ignition WAU Line State can be used to determine the Powermode status received on FlexRay versus the hardwired Ignition line status