The PCM/ECM determines CAN communication error and sets DTC U0001 if communication with other control devices (e.g. ABS) via CAN is impossible or PCM/ECM detects that communication time via CAN exceeds threshold value.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
CAN message transfer incorrect | 1. Open or short in CAN line 2. Poor connection or damaged harness 3. Faulty PCM/ECM |
Enable Conditions |
•
Battery voltage > 10V
•
Delay time >0.5 sec. | |
Threshold Value |
•
20 wrong messages received by PCM/ECM | |
Diagnostic Time |
•
1 sec. | |
MIL On Condition |
•
2 Driving Cycles |
