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Thread: Low battery start engine while battery @ 12.9v

  1. 12th May 2024, 08:38 AM #1
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    Low battery start engine while battery @ 12.9v

    Hi all,
    I seem to be having an electrical issue with my D4.
    I keep getting the Low battery start engine message on the dash when parked.
    It will also continue to beep the message every couple of minutes.
    Put the new battery on charge overnight and still get the message.
    Checked for error codes but nothing there.
    Voltage is at 12.9v stable.
    2014 SDV6 HSE - LLAMS, Tuff Ant Tree Sliders, Tuff Ant 18" rims, Nitto Ridge Grappler tyres 265/65 R18, Custom Lipo4 battery, Custom Drawer storage system https://www.box.com/s/jem0ilac3cner2mexq64
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  2. 12th May 2024, 08:39 AM #2
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    Also checked out the battery terminals
    2014 SDV6 HSE - LLAMS, Tuff Ant Tree Sliders, Tuff Ant 18" rims, Nitto Ridge Grappler tyres 265/65 R18, Custom Lipo4 battery, Custom Drawer storage system https://www.box.com/s/jem0ilac3cner2mexq64
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  3. 12th May 2024, 09:08 AM #3
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    Also disconnected the Redarc BCDC just in case this was affecting the battery
    2014 SDV6 HSE - LLAMS, Tuff Ant Tree Sliders, Tuff Ant 18" rims, Nitto Ridge Grappler tyres 265/65 R18, Custom Lipo4 battery, Custom Drawer storage system https://www.box.com/s/jem0ilac3cner2mexq64
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  4. 12th May 2024, 10:20 AM #4
    Jason.k
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    Woops wrong thread....edited.

    I have a similar issue. Purchased yesterday, brand new battery a few days ago.
    What i found was battery voltage showing 12.4v after unlocking car. Then about 5 mins later it increased to 12.62v. How much current exactly should it be drawing after unlocking the car to cause that kind of voltage drop?
    Last edited by Jason.k; 12th May 2024 at 10:23 AM. Reason: Wrong thread
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  5. 12th May 2024, 06:35 PM #5
    BradC
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    Quote Originally Posted by Jason.k View Post
    Woops wrong thread....edited.

    I have a similar issue. Purchased yesterday, brand new battery a few days ago.
    What i found was battery voltage showing 12.4v after unlocking car. Then about 5 mins later it increased to 12.62v. How much current exactly should it be drawing after unlocking the car to cause that kind of voltage drop?
    A ****load. When you unlock the car it boots all the computers up. Can be upwards of 20A while they all fire up. Discos are battery powered.
    MY08 D3 - The Antichrist - "Permagrimace". Turn the key and play the "will it get me home again" lottery.
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  6. 13th May 2024, 10:09 AM #6
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    Rich - did you reset the BMS when the new battery was fitted?
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  7. 13th May 2024, 10:46 AM #7
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    On the D4 or my secondary battery?
    Is that something you can do on the IIDTool?
    2014 SDV6 HSE - LLAMS, Tuff Ant Tree Sliders, Tuff Ant 18" rims, Nitto Ridge Grappler tyres 265/65 R18, Custom Lipo4 battery, Custom Drawer storage system https://www.box.com/s/jem0ilac3cner2mexq64
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  8. 13th May 2024, 12:28 PM #8
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    Quote Originally Posted by ~Rich~ View Post
    On the D4 or my secondary battery?
    Is that something you can do on the IIDTool?
    Yes, you will find a BMS reset option available with the GAP tool.
    2024 RRS on the road
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  9. 13th May 2024, 01:22 PM #9
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    Done let's see if that fixes the issue 👌
    2014 SDV6 HSE - LLAMS, Tuff Ant Tree Sliders, Tuff Ant 18" rims, Nitto Ridge Grappler tyres 265/65 R18, Custom Lipo4 battery, Custom Drawer storage system https://www.box.com/s/jem0ilac3cner2mexq64
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