As well as communicating the load status of the alternator to the PCM, the
regulator can also provide diagnostic information. In general the following fault
situations can be communicated:
• No communication between regulator and PCM.
• No alternator output due to mechanical fault (drive belt for example).
• Loss of electrical connection to the alternator.
• System over or under voltage due to short or open circuit eld driver.
• Failure of rotor or stator windings.
• Failure of a diode.
The PCM can initiate appropriate action in response to these failure conditions,
for example, to allow fail-safe operation ...
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