If the COM circuit from the alternator to the PCM is open or shorted, the PCM sets a P0620 DTC.
Item | Detecting Condition | Possible cause | |
DTC Strategy |
•
Voltage monitoring | 1. Poor connection 2. Open or short in circuit 3. Faulty PCM | |
EnableConditions | Case1 |
•
Engine running | |
Case2 |
•
Ignition ON | ||
Threshold value | Case1 |
•
Alternator COM line shorted ground or power | |
Case2 |
•
Alternator COM line open | ||
Diagnosis Time |
•
5 sec | ||
MIL On Condition |
•
DTC only (NO MIL ON) | ||
