the ibs ore the battery

danneldl · 03-09-2013, 11:04 AM

having problems with my battery warning light. and reseting of the odometer and clock now and then
but when I measure the battery shows 12.04 V

is the battery defect or ibs?
think the battery value is ok?
grateful for help / advice

nate5ks · 03-09-2013, 01:10 PM

What is the voltage at the battery terminals when the car is running and the voltage at the jump terminals when the car is running? 12.04 is on the low side of good battery voltage.

GMWNashville · 03-10-2013, 10:15 AM

Quote:

Originally Posted by nate5ks

What is the voltage at the battery terminals when the car is running and the voltage at the jump terminals when the car is running? 12.04 is on the low side of good battery voltage.

according to BMW 12.04 volts would be pretty shot. Anything less than 12.4-12.6 is too low from a testing standpoint

Orion4 · 03-11-2013, 01:29 PM

The 12.04 VDC doesn't sound right for the charging system which is what you are measuring with the meter with the engine running. Typically, you will see around 14 VDC output from the alternator when taking values at the battery posts. With the engine off and a fully charged good battery, you should see something in the range of 12.0-12.5 VDC at the battery.

CYANiDE · 03-11-2013, 01:31 PM

Yes, like orion4 said, you should get 14V+ with the car running. Anything less than that is either a bad battery or alternator.

Tom K. · 03-11-2013, 01:40 PM

Quote:

Originally Posted by CYANiDE

Yes, like orion4 said, you should get 14V+ with the car running. Anything less than that is either a bad battery or alternator.

Or a bad IBS!

Tom

BillionPa · 03-12-2013, 12:35 AM

did you get your voltage reading through OBD2 diagnostics or with a multimeter?

03-09-2013, 11:04 AM	#1
danneldl Enlisted Member 1 Rep 39 Posts Drives: 320d Join Date: Mar 2010 Location: stockholm iTrader: (0)	the ibs ore the battery having problems with my battery warning light. and reseting of the odometer and clock now and then but when I measure the battery shows 12.04 V is the battery defect or ibs? think the battery value is ok? grateful for help / advice
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03-09-2013, 01:10 PM	#2
nate5ks Captain 35 Rep 648 Posts Drives: 2006 BMW 330xi Join Date: Nov 2011 Location: Jacksonville Beach, FL iTrader: (0)	What is the voltage at the battery terminals when the car is running and the voltage at the jump terminals when the car is running? 12.04 is on the low side of good battery voltage.
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03-11-2013, 01:29 PM	#4
Orion4 Lieutenant Colonel 561 Rep 1,641 Posts Drives: 2013 335i Sport Line Sedan Join Date: Aug 2009 Location: Melbourne, FL iTrader: (0)	The 12.04 VDC doesn't sound right for the charging system which is what you are measuring with the meter with the engine running. Typically, you will see around 14 VDC output from the alternator when taking values at the battery posts. With the engine off and a fully charged good battery, you should see something in the range of 12.0-12.5 VDC at the battery.
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03-11-2013, 01:31 PM	#5
CYANiDE First Lieutenant 169 Rep 304 Posts Drives: X5 4.0i M Sport Join Date: Mar 2013 Location: NYC iTrader: (3)	Yes, like orion4 said, you should get 14V+ with the car running. Anything less than that is either a bad battery or alternator.
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03-12-2013, 12:35 AM	#7
BillionPa Second Lieutenant 2 Rep 288 Posts Drives: 335i Join Date: Feb 2013 Location: USA iTrader: (0)	did you get your voltage reading through OBD2 diagnostics or with a multimeter?
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