U0073

DTC U0073 CAN failure/system A bus off is detected.
DTC U0401 Engine data is abnormal.
DTC U0416 VDC data is abnormal.
DTC U0422 Body integration data is abnormal.
DTC U0423 Meter data is abnormal.

Circuit description

NOTE:
^ Problems on the CAN bus (communication line) can be checked from the DLC3 connector. (Except when a DLC3 branch line is disconnected.)
^ Diagnostic codes related to CAN communication can be checked using SSM3.
^ Although DLC3 is connected to the CAN communication line, CAN communication cannot detect problems on the DLC3 branch lines.





Monitor description

TCM calculates the heat amount absorbed by friction material based on the difference between turbine speed and output shaft speed (slipping clutch). When the amount of heat absorption exceeds a certain value, TCM turns on MIL and outputs diagnostic codes.

CAUTION:
If the vehicle continues driving in such a condition, the clutch burns out and the vehicle cannot be driven.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS
U0073: CAN bus OFF





U0401: TCM communication counter








U0416: VSC communication counter





TYPICAL MALFUNCTION THRESHOLDS
U0073: CAN bus OFF





U0401: TCM communication counter





U0416: VSC communication counter





Inspection steps