DTC U1100: Powertrain Control Module Time-out (Related to Engine); DTC U1101: Powertrain Control Module Time-out (Related to A/T): Notes
CAUTION:
If DTC U1100 or U1101 is set in the combination meter, always diagnose the CAN bus lines.
CAUTION:
Whenever the ECU is replaced, ensure that the communication circuit is normal.