Alternator output and power demand of all electrical loads and systems must be matched to each other as ideally as possible so that the entire system is reliable and trouble-free in operation. The ECM monitors alternator output deviation from the signal of the FR terminal of the alternator when the engine is running.
P0620 is set when alternator control circuit is open or short at IG "ON"
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Signal Monitoring |
•
Control circuit is open or short
•
Poor connection or damaged harness |
Enable Conditions |
•
IG "ON" | |
Threshold value |
•
Signal circuit is open or short | |
Diagnosis Time |
•
1sec | |
MIL On Condition |
•
OFF |
