DTC U101B-87: Lost Communication With GSM - Multiple Bus - Missing message: Action
- Refer to the applicable SYSTEM WIRING DIAGRAM(S) and check the transmission control switch power and ground circuits for open circuit, high resistance
- Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the applicable SYSTEM WIRING DIAGRAM(S) and check the high speed CAN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Refer to the applicable SYSTEM WIRING DIAGRAM(S) and check the LIN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Using the manufacturer approved diagnostic system, check the transmission control switch for related DTCs and refer to the relevant DTC index