DTC U0400-87: Invalid Data Received - Missing message: Action
- Using the Jaguar Land Rover approved diagnostic equipment, check the snap shot data to determine the missing message source control module. Check datalogger signal - Network Operating System ECU Local Signal Handle (0xD020). Check the relevant control module for related DTCs and refer to the relevant DTC index
- Refer to the electrical circuit diagrams and check the FlexRay bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Replace the wiring harness as required