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That's a fairly generic question. And this is your first post. What did your dealer say?
 

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Like rich said, you'll have to be a bit more specific than that. What kind of noise at question? Any particular sounds?
Maybe even record that sound and upload to YouTube and than post link here.
 

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The smart alternator uses braking and coasting to charge the battery, but this is not really detectable to the human ear.

As others have said, more detail will help.
 

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The smart alternator uses braking and coasting to charge the battery...
Not quite. The "Smart Alternator" charges while engine load is lower and stops when more power is needed for the wheels, but it doesn't actually use braking and coasting to generate current. That would be regenerative braking.

Also, if voltage is below a certain level, the alternator will charge regardless of engine load.
 

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Not quite. The "Smart Alternator" charges while engine load is lower and stops when more power is needed for the wheels, but it doesn't actually use braking and coasting to generate current. That would be regenerative braking.
Sigh :rolleyes:

All I meant is that the system strives to charge the battery during braking or coasting, as opposed to while you are idling in rush-hour traffic with the A/C on full blast listening to Twisted Sister's Greatest Hits. But yes, it will break the aforementioned rule anytime voltage is required. :57:
 
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