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Thread: Cold battery voltage? - 1.9CDTi 16v

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    Full Member djr69uk's Avatar
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    Default Cold battery voltage? - 1.9CDTi 16v

    Would those with a 1.9CDTi and CD70 please go into test mode tomorrow and on the second page you have a voltage reading top right of screen. I'd be interested to know what they show. Mine was 11.5v this morning before I started her up - think this is a bit low.

    Please do this BEFORE you turn the car over. Thanks


    (test mode accessible on CD70 by pressing 'main' button, then pressing and holding 'settings' for 5 seconds. you'll hear a aircraft cabin style 'bong' then pressing 'BC' will cycle through screens of useful/useless data.)

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    14.1v this morning

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    Full Member Big Sig's Avatar
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    Quote Originally Posted by mparks8590 View Post
    14.1v this morning
    With the engine running????? or before you started it??????
    Now I need a turbo to keep up!

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    Regular Member mitch's Avatar
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    13.5

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    Just done mine, been standing for 2 days tho. It reads 12.2, not sure if thats good, bad or ugly!?! Hope it helps anyway.

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    That does seem a little low. If your battery is on the way out, I remember reading something a while ago for leaving your lights and hi-beams on for half a minute or so before starting to 'wake up' the battery. I'll have to do mine with a multi-meter when I get round to it.

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    Regular Member scottyd's Avatar
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    thats low get your charging system checked mate sounds like battery is goosed but you need to check alternator out put including amp(the important bit)

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    12.3V, temp -0.5 C. Terminator eye is green.

    If approx 14V when running with high electrical load (e.g main beam & fan no4 & rear demist) then generator is OK.

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    The following link has lots of info' with the table at 4.4.3 showing the relationship between a battery's state of charge and temperature.

    http://www.checkthatcar.com/carfaq4.asp

    Dave
    Last edited by DaveG; 26th November 2010 at 00:05.

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    Full Member djr69uk's Avatar
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    ...and this morning the display reported 11.4v before I turned it over.

    Left the car stationary but running and put front and rear demister on to clear screens. A minute later the battery light came on. I left it about 5 minutes and voltage had increased to 13.7v. As soon as I drove off it went back up to ~14.2v.

    Fairly confident the battery shouldn't have drained to just 11.4v overnight. Unless something is sapping power excessively overnight, then I'd say my battery was kapput!

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