DTC U0103-63: Lost Communication With Gear Shift Control Module A - Circuit/component protection time-out
- Transmission control switch power or ground circuit open circuit, high resistance
- High speed CAN bus circuit short circuit to ground, short circuit to power, open circuit, high resistance
- Transmission control switch system fault
- 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
- Using the manufacturer approved diagnostic system, check the transmission control switch for related DTCs and refer to the relevant DTC index