DTC U0256-87: Lost Communication With Front Controls Interface Module "A" - Missing message: Action

Refer to the appropriate system wiring diagrams and check the integrated control panel power and ground circuits for open circuit, high resistance
Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the appropriate system wiring diagrams and check the medium speed CAN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance
Using the manufacturer approved diagnostic system, check the integrated control panel for related DTCs and refer to the relevant DTC index