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Thread: 2001 740il no crank no start. Purchased at auction this way.

  1. #1
    Join Date
    Aug 2018
    Location
    Olympia, WA
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    My Cars
    2001 BMW 740il

    2001 740il no crank no start. Purchased at auction this way.

    Hello I am a brand new member and just picked up a 2001 740il with 125k from a local auction. It does not crank or start. Please help me figure out whats wrong.
    Here is what i've found so far.

    No power to starter relay on pin 86 or 30

    Car also has no P light on dash gear indicator, i purchased a used neutral safety switch from a 97 740il with no effect.

    It seems that the ews is not working/ allowing power to be applied to starter relay, but would the NSS cause this? Basically which should i figure out first?

  2. #2
    Join Date
    Feb 2009
    Location
    KC North, MO, USA
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    11,153
    My Cars
    1996 740iL
    Welcome to the forum. If the DME doesn't see it's in P or N, it's not going to do anything. Have you checked the ebox to make sure the modules are there and plugged in? Everything look good under the plate at the gear shift?

    Selector position lights don't care anything about the EWS. It should come on even without the key in the ignition.

  3. #3
    Join Date
    Aug 2018
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    Olympia, WA
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    2001 BMW 740il
    Quote Originally Posted by Mayorchuck View Post
    Welcome to the forum. If the DME doesn't see it's in P or N, it's not going to do anything. Have you checked the ebox to make sure the modules are there and plugged in? Everything look good under the plate at the gear shift?

    Selector position lights don't care anything about the EWS. It should come on even without the key in the ignition.

    Looks like i need a wiring diagram for the Neutral safety switch then. Power to the starter comes from EWS, i need to figure out how the DME ties into the no crank condition.

  4. #4
    Join Date
    Feb 2010
    Location
    Hampshire UK
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    My Cars
    99 840ci Sport Indv

  5. #5
    Join Date
    Aug 2018
    Location
    Olympia, WA
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    My Cars
    2001 BMW 740il
    i tested power and grounds to the DME and EGS, they are good. I scanned the car with a friends laptop using carsoft software i believe and most modules wouldn't respond. Heres a pic of what showed up.

  6. #6
    Join Date
    Aug 2018
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    Olympia, WA
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    2001 BMW 740il
    well guess im not allowed to post pictures. Anyway i believe that the dme and egs are done for since they do not respond but have good power and ground supply. Does the egs require coding if replaced with used?

  7. #7
    Join Date
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    99 840ci Sport Indv
    As long as you get an EGS from the same year and model no programming is needed
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  8. #8
    Join Date
    Feb 2009
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    KC North, MO, USA
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    1996 740iL
    Quote Originally Posted by ctiedje03 View Post
    well guess im not allowed to post pictures. Anyway i believe that the dme and egs are done for since they do not respond but have good power and ground supply. Does the egs require coding if replaced with used?
    It's just your low post count. New members need approval to post photos or links. This is a spam preventative. If you use a photo host site and copy the IMG into the post, it will send a request for approval. One of us usually approve it within a few hours.

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