As vehicles electronically controlled, various control unit is applied to vehicle and several units are controlled based on the signals from the sensors. Therefore sharing signals of sensors and information is required. To meet this requirement, CAN communication type, which is insensible to external noises and whose communication speed is fast, is applied to power train control.Sharing signals from RPM, APS, gear shifting, torque reduction in ESP, ABS and various modules, addtive control is performed.
If there is no message from TCU to ECM through external CAN line, PCU sets DTC U0101.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
CAN communication status check | 1. Poor connection |
Enable Conditions |
•
IG ON | |
Threshold Value |
•
No message time from TCU via external CAN | |
Diagnostic Time |
•
Continuous | |
MIL ON Condition |
•
2 driving cycle |
