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Old 19th June 2018, 15:43   #1
chris75
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2001 Rover 75 2.0 v6 Connoisseur Saloon

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Default BCU backup battery ?

I have been told today that the reason my BCU becomes a gibbering idiot every time I disconnect the battery is that there will be an internal backup battery , which must have died .
I have never heard of this before . Can anyone confirm if there is an internal battery in the BCU ?
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Old 19th June 2018, 15:50   #2
suzublu
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There's a battery in the BBUS, but not, as far as I'm aware, in the BCU
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Old 19th June 2018, 16:43   #3
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No there isn't a battery inside the BCU

Brian
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Old 19th June 2018, 16:45   #4
BigRuss
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There isn't a back up battery in the BCU

The information is written in to the flash memory and should remain there without any problem.

Sounds like there's a problem with the BCU

Russ
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Old 19th June 2018, 19:07   #5
chris75
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Quote:
Originally Posted by BigRuss View Post
Sounds like there's a problem with the BCU

Russ
I guess you are right
Is a straight swap for another used BCU possible ? I assume that the keys would need recoding , and enabled options might be different , but would the car "work" from the off ? At the moment I have no central locking , my windows work on the wrong buttons and I have no aircon but other than that the car works ok
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