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Thread: Disconnected battery for one hour, now E34 wont start

  1. #1

    Default Disconnected battery for one hour, now E34 wont start

    Hey everyone, a while back i left the lights on on my e34 for 8 hours and had to get it jump started by a tow truck.
    Since then, my radio says "code", I tried putting the correct code in but no joy...
    I tried disconnecting the battery for an hour with the key in position 1 and the lights on so I can start fresh and enter the code again.
    After reconnecting the battery, my engine wont turn! All lights work and everything seems normal but absolutley nothing happens when I try to start my engine.

    Any ideas?

  2. #2
    Join Date
    May 2006
    Location
    NH
    Posts
    2,062

    Default

    my idea is your battery isn't charged enough to start the engine?
    1995 540i Manual build 1/95

  3. #3
    Join Date
    Jun 2006
    Location
    Bethesda, MD
    Posts
    385

    Default

    What model/year. Perhaps some sort of immobilizer.. or not enough charge.

  4. #4
    Join Date
    Jan 2008
    Location
    Quebec, Canada
    Posts
    608

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    Make sure the car is in neutral or park...


    BMW E34 1992 525i Touring

    RIP Touring...probably never going to drive you again...

  5. #5
    Join Date
    Feb 2004
    Posts
    4,894

    Default

    Recharge your battery first!

  6. #6
    Join Date
    Dec 2004
    Location
    Sydney, Australia
    Posts
    4,374

    Default

    Quote Originally Posted by Murphy211
    Hey everyone, a while back i left the lights on on my e34 for 8 hours and had to get it jump started by a tow truck.
    Since then, my radio says "code", I tried putting the correct code in but no joy...
    I tried disconnecting the battery for an hour with the key in position 1 and the lights on so I can start fresh and enter the code again.
    After reconnecting the battery, my engine wont turn! All lights work and everything seems normal but absolutley nothing happens when I try to start my engine.

    Any ideas?
    You may have upset the fusible link. It is worth changing these every 10 years as they go wrong in very esoteric and non-obvious ways.

    However if yours is a late e34, it might be DWA has been activated. Some say you have to goto the dealer... (ie get a tow truck) I hope this isn;t the case. If you have got this, and it is having this fault, you can test for +12V on the wire from the ignition switch, if you have signal here, trace it to the back of EWS unit, then see if you have starter coming out. I don't know how thei works, but it seems to get around the DWA problem if the EWS unit is interrupting the starter signal. It might pay to check you have 12V on your fuel pump first. Good luck nick

    Join the Aussie
    540i LE yahoo forum

    08/88 535i e34 M30+miller MAF, 'stiens, tints & teeth!

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