Alternator in which there is a communication regulator in order to compensate current loss resulting from repetitive starting. The alternator is duty controlled as current control by ECM/PCM with the battery voltage, current, temperature information from battery sensor. The more electrical load, the higher duty output.
If the alternator's output duty signal is over 50% under IG ON (Engine speed is below 20rpm.), ECM/PCM sets P0625.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Input signal check | 1. Short to Ground in harness 2. Poor connection or damaged harness |
Enable Conditions |
•
Engine speed < 20rpm | |
Threshold Value |
•
Alternator duty > 50% | |
Diagnostic Time |
•
- | |
MIL ON Condition |
•
No MIL |
Fig 1) Idle Status
Fig 2) Electrical Load (Head Lamp and Defrost are ON
Duty(+) from FR terminal is increased if electrical loads are ON(Head Lamp and Defrost are ON) ECM/PCM controls generation of alternator with duty from FR terminal when electrical Loads turn on
