If there is no message from the TCU to the ECM through the external CAN line, the ECM sets DTC U0101.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
CAN communication status check | 1. Poor connection |
Enable Conditions |
•
Battery voltage 9 V~16 V | |
Threshold Value |
•
Duration of communication lost with TCM > 2 sec. | |
Diagnostic Time |
•
Continuous | |
MIL ON Condition |
•
2 driving cycles |
