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Thread: Loss of 12v Power on Ignition

  1. 12th May 2023, 07:32 PM #11
    DiscoJeffster
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    Are you sure you’re pushing the brake pedal down far enough to disengage the brake switch to get it to start. Many have failed at this point and sit there simply turning the ignition on and off again.
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)
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  2. 12th May 2023, 08:35 PM #12
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    Quote Originally Posted by DiscoJeffster View Post
    Are you sure you’re pushing the brake pedal down far enough to disengage the brake switch to get it to start. Many have failed at this point and sit there simply turning the ignition on and off again.
    D3. It has a key Loss of 12v Power on Ignition
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  3. 12th May 2023, 08:39 PM #13
    DiscoJeffster
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    Quote Originally Posted by Tombie View Post
    D3. It has a key Loss of 12v Power on Ignition
    It still has a brake interlock. I never mentioned a button.
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)
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  4. 12th May 2023, 09:24 PM #14
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    Loss of 12v Power on Ignition

    Quote Originally Posted by DiscoJeffster View Post
    It still has a brake interlock. I never mentioned a button.
    No brake interlock on starting the D3. But the interlock does stop you taking it out of Park.
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  5. 12th May 2023, 09:31 PM #15
    DiscoJeffster
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    Quote Originally Posted by DiscoDB View Post
    No brake interlock on starting the D3. But the interlock does stop you taking it out of Park.
    Well I’ll be. There you go. How primitive Loss of 12v Power on Ignition
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)
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  6. 13th May 2023, 12:28 AM #16
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    Quote Originally Posted by DiscoJeffster View Post
    Well I’ll be. There you go. How primitive Loss of 12v Power on Ignition
    How ever did people survive with such ancient technology? Loss of 12v Power on Ignition
    "Land Rover - making mechanics out of everyday motorists for nearly 70 years"
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  7. 13th May 2023, 07:13 AM #17
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    Loss of 12v Power on Ignition

    Quote Originally Posted by John_D4 View Post
    How ever did people survive with such ancient technology? Loss of 12v Power on Ignition
    It’s a struggle - we even have to open the bonnet to check the oil level, and don’t ask how we can lower ourselves to change the oil. Urghhh!
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  8. 13th May 2023, 10:10 AM #18
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    Quote Originally Posted by BradC View Post
    I've had this happen twice. First time was in the D3 and there was an issue with the clamp on the battery earth. Precisely the same symptoms and was rectified by a remove, clean and re-seat both terminals.

    The second time was in the wifes Hyundai and the battery developed an internal fault. It'd hold a fine voltage until the load hit a certain point, then it'd just play dead. Like a switch being turned off. I've never seen a fault like it.
    So, following Brad's advice, I cleaned the terminals and bingo, it fires up first go..........but now the EAS has decided to lower itself to the stops. Aaaargh!

    Battery related, or coincidental? Dash error: 'Suspension Fault. 30 mph max'.

    Diagnostic tool shows no fault.
    'sit bonum tempora volvunt'

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  9. 13th May 2023, 10:14 AM #19
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    Loss of 12v Power on Ignition

    I would put money on it being voltage related. Clear fault and see how it goes. 🤞🤞Loss of 12v Power on Ignition
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  10. 13th May 2023, 12:05 PM #20
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    Quote Originally Posted by DiscoDB View Post
    I would put money on it being voltage related. Clear fault and see how it goes. 🤞🤞Loss of 12v Power on Ignition
    Pressure sensor voltage at all corners is 4.9v.

    I have done a 'Hard Reset', to no avail and checked the 70A relay. Relay clicks in and out and shows 0.000 ohms resistance.

    I can hear the compressor working normally, too.

    Might be time to give my friendly, local auto 'leccie a call and the lure of an ale or two.

    'Terrain Response' not available either. Due to the lack of height, perhaps?
    'sit bonum tempora volvunt'

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