If the 4WD ECU doesn't get some ABS/ESP signals from ABS/ESP moduel, it sets U0121.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
CAN Signal Check | 1. Poor connection 2. Open or short in CAN communication line 3. Error in ABS/ESP unit 4. Error in Wheel speed sensor |
Enable conditions |
•
IG " ON" or Engine " ON " | |
Threshold value |
•
It can't get some CAN signals from ABS/ESP module. | |
Detecting time |
•
2 seconds |
