DTC U0121: ABS/ASC CAN timeout: Notes
CAUTION:
- If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines .
- Whenever the ECU is replaced, ensure that the CAN bus lines are normal .
- When the ACC/FCM-ECU is replaced, calibrate the radar (refer to ADAPTIVE CRUISE CONTROL SYSTEM COMPONENT CHECK ).