Failure of the component

The main function of the alternator is also ensured in the event of interruption of the communication between the alternator and the engine control unit. The following fault causes are distinguishable by the fault memory entries:

• Overheating protection: The alternator is overloaded. For safety reasons, the alternator voltage is reduced until the alternator has cooled down again. That is a normal operating condition for the alternator.
• Mechanical fault: There is a mechanical block in the alternator. Or the belt drive is defective.
• Electrical fault: Defect in the excitation power circuit (transistor, diode), open circuit in the excitation coil, faulty controller.
• Communication failure: Faulty cable between engine control unit and alternator.
• Incorrect type of alternator: Incorrect or non-approved alternator installed

An interrupt or short circuit in the coils of the alternator cannot be detected.