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Battery charging voltage

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by stevebuba, Mar 26, 2011.

  1. stevebuba
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    stevebuba New Member

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    Does anyone know what the above is for a 2 litre fsi?

    Thanks
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  2. BlackQuat
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    BlackQuat Well-Known Member

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    Most cars are 14.6
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  3. stevebuba
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    stevebuba New Member

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    Mine is charging at 13.8 so could the alternator be faulty?
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  4. Woorlord
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    Woorlord shifting to Hyperspace... .

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    According to Audi Workshop Manual Charging Voltage must not exceed 14.4V, and.....
    A battery terminal voltage of 12.5V is expected to be normal at no load. (i.e. measure with a voltmeter with the negative terminal cable disconnected.)
    A no-load voltage between 11.6V~12.2V would indicate a totally discharged battery.

    I checked my charging voltage and it is 14.2V. I would have thought a 13.8V charging voltage should be OK.
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  5. scott b
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    scott b Active Member

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    13.8 - 14.4 is normal
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  6. stevebuba
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    stevebuba New Member

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    Yeah alternator seems to be ok, but battery is dead. Just replaced it with a new BOSCH not the easiest job in the world, trying to get to the 6mm allen bolt at the front of the battery is a real pain first you have to remove the rubber seal on the secondary firewall, then lift the clips on the foam cable thingy and then you can just about get a 1/4" drive allen socket on it, but if your short like me i had to kneel on the engine to reach!!!!
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