battery voltage?

rudyv1 · 07-22-2010, 10:41 PM

the hidden BC menu in my 135i is reporting the battery voltage as 12.2-12.3

is this what everyone else is getting?

Thanks

JimD · 07-23-2010, 07:08 AM

Running or with the engine off? For engine off, this is OK. For running, it is too low. How do you get to a "hidden BC menu"?

I check cars for a working alternator by checking the voltage at the battery with the engine running. If it is not over 13V, I conclude the alternator is not working.

Jim

rudyv1 · 07-23-2010, 07:37 AM

That is with the engine Off. I will have to check with the engine on later today. Thank you for the information

There is a guide located here to access the hidden BC menu:
http://e90.wetpaint.com/page/BC+hidden+menus?t=anon

Simsims · 07-23-2010, 10:15 AM

battery should be 14v unloaded

aerobod · 07-24-2010, 12:09 PM

Quote:

Originally Posted by Simsims

battery should be 14v unloaded

Unloaded, a 6-cell lead-acid battery has an output of 12.63V, 2.105V per cell.

07-22-2010, 10:41 PM	#1
rudyv1 Private First Class 37 Rep 193 Posts Drives: 2008 135i Convertible Join Date: Jun 2009 Location: Kitchener ON iTrader: (0)	battery voltage? the hidden BC menu in my 135i is reporting the battery voltage as 12.2-12.3 is this what everyone else is getting? Thanks
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07-23-2010, 07:08 AM	#2
JimD Brigadier General 369 Rep 3,547 Posts Drives: 128i convertible Join Date: Apr 2009 Location: Lexington, SC iTrader: (0)	Running or with the engine off? For engine off, this is OK. For running, it is too low. How do you get to a "hidden BC menu"? I check cars for a working alternator by checking the voltage at the battery with the engine running. If it is not over 13V, I conclude the alternator is not working. Jim __________________ 128i Convertible, MT, Alpine White, Black Top, Taupe Leatherette, Walnut, Sport Ordered 5/22/09, Completed 6/4/09, At Port 6/9/09, On the Georgia Highway 6/13/09, Ship Arrived Charleston 6/24/09 at 10pm, PCD 7/21/09
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07-23-2010, 07:37 AM	#3
rudyv1 Private First Class 37 Rep 193 Posts Drives: 2008 135i Convertible Join Date: Jun 2009 Location: Kitchener ON iTrader: (0)	That is with the engine Off. I will have to check with the engine on later today. Thank you for the information There is a guide located here to access the hidden BC menu: http://e90.wetpaint.com/page/BC+hidden+menus?t=anon
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07-23-2010, 10:15 AM	#4
Simsims Captain 37 Rep 615 Posts Drives: 119/220 Join Date: Jul 2009 Location: Ottawa iTrader: (0)	battery should be 14v unloaded __________________ VO 1M - everything except sunroof RIP BSM 135i 2009-2011
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