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Battery will not stay charged, is it the BCM

Tiny
MICHAEL A WILLIAMS
  • MEMBER
  • 2009 NISSAN MAXIMA
  • V8
  • AUTOMATIC
  • 98,000 MILES
Took it to the mechanics and was told it was not the alternator but the BCM instead. Is that true? Because I feel as if they did not want to replace alternate because everything like parts and labor were under warranty.

Just want to know if it's true or not

Concerned Maxima owner.
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Tuesday, August 25th, 2020 AT 3:18 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

There is a module called the intelligent module which also is called a body control module. It does have an influence on the alternator system. It turns the alternator on and off based on load.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

This could be the issue but needs to be verified.

My suggestion is to tell him that if you give him the okay to replace it, it must fix the issue. If it does not, tell him you will not pay the bill.

I attached diagrams for you to view.

Roy

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Tuesday, August 25th, 2020 AT 3:40 PM

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