1995 E36 m3 immobiliser/ews problem - Page 3

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Thread: 1995 E36 m3 immobiliser/ews problem

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    #21
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    i will try it tomorrow. im 99% sure its an immobiliser problem just want to know for sure before i start spending money on parts.

    id like to keep it all working if i can. if i need to buy a new key to jump start this 1 i will.
     
     

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    #22
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    Good luck with the DME swap. It's worth a try. If you're getting +12v to the EWS from the ignition switch (black/yellow or green/black wire I think) but not on the output to the starter (black yellow wire?) it does sound EWS or Key related.
    As far as I'm aware, with EWS2 the EWS unit would enable the starter as long as the key was recognised, and allow the car to crank. It just wouldn't enable the coils and injectors unless the code sent to the DME were then verified as ok.

    When my DME on a 95 model was knackered by water and was operating the injectors just with the ignition switched on, the starter still cranked over.
     
     

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    billywhizz1984 (12-01-2011)

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    #23
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    i will try swapping dme's but i dont think that is where the code is held.
    the reason for this is last year i swapped ecus with a mate of mine for a bit to try and diagnose a fault that could have been ecu related (coil breaking down)
    i fitted his ecu to my car without doing anything else and it started and ran as normal off my key/ews/alarm.....

    so if it worked with my ews and his ecu then it should work now with my ecu but a different ews, the code must be held elsewhere? as in the little transmitter i was on about?
     
     

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    #24
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    If you want to swap parts, you need to swap the DME, EWS box, and chip - Make sure yours is removed from the key, as the induction ring will more likely pick the code up off your key !

    Another thing to try, is lock the car (double lock it, make sure the petrol flap locks), but leave the window down... Once locked, turn the ignition on. IF the car unlocks, then the code HAS been recognized by the EWS box (As a correctly recognized code by the EWS sends an unlock signal to the ZKE). If the car doesn't unlock, then chances are, the code has been 'lost' off the key !
     
     

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    #25
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    Thats helpful, by double lock do u mean lock, unlock, lock again? Or lock, lock then ign? If i lock it twice nothing mechanical happens on the 2nd lock, it doesnt dead lock.

    I have the induction ring off my dads car plugged in and lying on the floor so it doesnt pick up my key.

    Im not sayin u guys are wrong but y would my car run when i fitted my mates ecu but not his key/ews?
     
     

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    #26
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    Ahhh, so the induction ring can't pickup your key - Thats good.

    When I say double lock, I mean use the key in the door, and just lock it as normal (No turning to lock then unlock again like Fords), you can confirm it's double locked if the petrol flap has locked, or try reaching for the interior handle, and pull it.
    Don't just lock using the pin on the door, as that doesn't double lock. Don't use the alarm either, as it'll go off when you try the ignition, and it will more than likely try to close the windows too.

    What year is your mates M3 ?
     
     

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    #27
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    Yea induction ring on the floor with the key from that car in it.
    My dads car that im takin the bits off now is a 95 car,
    My mates car whos dme i fitted ages ago is a 95 car, mine is 95 to, so all the same year.

    Ill try refittin all my bits tonight and see if it unlocks, then put my dads bits on it after.

    Stupid thing is it was fine when i parked it up.

    If it is the key can it be reprogrammed to work again?
     
     

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    #28
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    As Billy has said previously, you will need to get a spare from BMW.

    Let us know how you get on with the double lock.
     
     

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    #29
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    Quote Originally Posted by billywhizz1984 View Post
    .... Next make sure the alarm is unset and try locking & unlocking the car with the key, then try to start it (this will send the unset signal to EWS). Lastly try another key if you have one.
    Already been down the double lock route I'm afraid!
     
     

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    #30
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    You've said to lock, then unlock... But the doors need to be double locked for the EWS to send the unlock command to the ZKE.

    The literature I have, says:
    Recognition of a valid key by the EWS II module causes
    it to send an unlock signal to the GM if the vehicle is
    in double lock.
    GM, being referred to the ZKE.
     
     

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