Diagnostic Trouble Code (DTC) Information ECM-P062074
Condition
The engine control module (ECM) regulates the alternator charge voltage (via LIN communication) on request of the central electronic module (CEM) (via CAN communication). The alternator control module (ACM) sends information on the fault to the engine control module (ECM) (via LIN communication). The diagnostic trouble code is generated if the alternator control module (ACM) sends the engine control module (ECM) information on a mechanical fault in the alternator (engine speed exceeds a certain value but the alternator is not operating).
The diagnostic trouble code can be diagnosed when the engine is running.
Substitute Value
- The alternator control module (ACM) (charge regulator) charges with a fixed voltage of 13.8 V.
Possible Source
- Damaged auxiliaries belt and belt tensioner.
- Damaged freewheel.
- Damaged alternator.
Fault symptom[s]
- Battery discharged.
- Low starter motor RPM.
- Noise from alternator.
- The engine judders under acceleration