DTC U0100-87: Lost Communication With ECM/PCM "A" - Missing message: Action
- Refer to the appropriate system wiring diagrams and check the power and ground connections to the engine control module. Clear DTC and retest
- Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the appropriate system wiring diagrams and check the CAN network between the engine control module and the parking aid control module