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Thread: E39 M5 Not starting

  1. #11
    Had the same problem,mine was ignition switch,

  2. #12
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    Tried a new battery just now; no dice. Still no lights showing on the dash (except airbag)

    Regarding the ignition switch, I changed this yesterday

  3. #13
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    Quote Originally Posted by Murdoch View Post
    Tried a new battery just now; no dice. Still no lights showing on the dash (except airbag)

    Regarding the ignition switch, I changed this yesterday
    Any chance its a bad key? Or immobiliser related?

  4. #14
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    Quote Originally Posted by Murdoch View Post
    Tried a new battery just now; no dice. Still no lights showing on the dash (except airbag)

    Regarding the ignition switch, I changed this yesterday
    Did it work since the ignition switch was changed?


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  5. #15
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    Hi

    It's starting to look that way (immobiliser/key... some authentication thing...) - though I tried both keys I have - and they work fully with all boot / lock unlock etc via remote.

    Regarding the ignition switch; it stopped working on the old one - I replaced it and the problem persisteted so I suspect that it's not really to do with the ignition switch (I unplugged it fully yesterday and there are 0 lights / obd screen when it's unplugged)

    Picture shows what I get when I have the key in position II, where you would normally see all the warning lights etc. The airbag light does actually show up and then turn off after 2 or 3 seconds.

    I did the cluster test and all lights are working on it.
    Attached Images Attached Images

  6. #16
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    did you try turning the ignition switch with a screwdriver when removed. maybe the ignition itself is the issue

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  7. #17
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    Quote Originally Posted by ian.j View Post
    did you try turning the ignition switch with a screwdriver when removed. maybe the ignition itself is the issue

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    Hey

    Not sure what you mean; do you mean to physically turn the back of the ignition switch when plugging in with a screwdriver? I didn't think it would work without detecting if there was a key?!

    If you mean this then I will give that a go this evening

  8. #18
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    Quote Originally Posted by Murdoch View Post
    Hey

    Not sure what you mean; do you mean to physically turn the back of the ignition switch when plugging in with a screwdriver? I didn't think it would work without detecting if there was a key?!

    If you mean this then I will give that a go this evening
    Ya, but leave key in ignition so the chip in key is picked up by the immobilizer ring thats around the ignition barrel

  9. #19
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    Cheers - I'll give that a try in the morning then :-)

  10. #20
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    disconnect wiring from ignition barrel and try turn it with screw driver, with key left in ignition, let it read the key
    Motor Confidence-14b Knockmitten lane,Western ind est ,Naas road D12

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