DTC U1A00-81: Private Communication Network - Invalid serial data received: Action

NOTE: DO NOT replace the adaptive cruise control module for this DTC

Refer to the appropriate service information and check the private CAN bus circuit between the image processing control module and the adaptive cruise control module for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary
Using the Jaguar Land Rover approved diagnostic equipment, check the image processing module for related Diagnostic Trouble Code(s) and refer to the relevant DTC index