The ECM/PCM determines CAN communication error and sets DTC U0001 if communication with other control devices (e.g. ABS) via CAN is impossible or ECM/PCM detects that communication time via CAN exceeds threshold value.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
CAN communication check | 1. Open or short in CAN line 2. Poor connection or damaged harness 3. Faulty ECM/PCM |
Enable Conditions |
•
16V > Battery Voltage > 9V
•
Time after engine start > 1 sec. | |
Threshold Value |
•
BUS-off time is more than 2 sec. | |
Diagnostic Time |
•
Continuous | |
MIL On Condition |
•
2 Driving Cycle |
