DTC U0138-87: Lost Communication with All Terrain Control Module - Missing Message: Action
- Refer to the electrical circuit diagrams and check the terrain response control module power and ground circuits for open circuit, high resistance
- Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the electrical circuit diagrams and check the high speed CAN bus (chassis) circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Using the manufacturer approved diagnostic system, check the terrain response control module for related DTCs and refer to the relevant DTC index