DTC U0140-63: Lost Communication With Body Control Module - Circuit/component protection time-out: Action

Refer to the appropriate system wiring diagrams and check the central junction box 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 high 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 central junction box for related DTCs and refer to the relevant DTC index