The ECM determines CAN communication error and sets DTC U0001 if communication with other control devices (e.g. ABS) via CAN is impossible or ECM detects that communication time via CAN exceeds threshold value.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
CAN communication monitoring | 1. Poor connector connection 2. Short in C-CAN high line 3. Short in C-CAN low line 4. Short circuit between CAN high and low line 5. Faulty modules that connected to C-CAN |
Enable Condition |
•
Battery voltage is higher than 10.8V
•
Ignition switch "ON" for over 1 sec | |
Threshold Value |
•
CAN BUS error | |
Diagnosis Time |
•
Continuous | |
MIL ON Condition |
•
2 driving cycles |
