2003 E46 325 Immobiliser Problem?

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  1. 2003 E46 325 Immobiliser Problem? 
    #1
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    Buzzcock's Car Details
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    Hi, Wonder if anyone can help!
    My wife has a 2003 325 M, until 1 month ago absolutely no problems at all, then: One day after taking the little one out for a drive / sleep the car wouldn't start, no starter motor whirring nothing, but all the lights on the dash lit up, I thought an immobiliser problem. So a mechanic friend of mine took it to his garage and started trouble shooting, he looked into everything (forgive me I'm not a mechanic) and after exhausting most things he put it down to the 'inhibitor' which needed coding, and only BMW could do this. When BMW started coding the car it then decided not to work (after my mechanic had tested this to death) The BMW computer didn't bring up any faults but the 'technician' decided it was the key. £300 ish later new key and coded the car now worked - past tense. Until yesterday when now the car decided not to work but when turning the key, the car does turn over and engages the fuel pump. I was never 100% that it was the key but it did work for a while. We have exhausted all the usual poor connections etc, I just don't have 100% faith now that BMW will fix without just replacing everything.
    Thanks
     
     

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    beam99's Car Details
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    Did your mechanic or bmw check to see if power was been sent from the ignition key to the starter when the key was in the start position?
     
     

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    Buzzcock (28-07-2009)

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    I believe it's the DME that sends the signal to the starter once the EWS roll code has been matched....so I've been told.
     
     

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    Buzzcock (28-07-2009)

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    Dr of BMW gildersol's Avatar
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    When checking all connections, were the connections from the auto gearbox checked?
     
     

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    Buzzcock (28-07-2009)

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    Yes he did check to see if the power has been sent from the ignition key. The EWS was changed, and yes all the connections were checked from the auto gearbox.
    Is it possible that the new key (that worked for 2 weeks) has lost its code??
     
     

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    You say the EWS module was changed? Then the DME must get programmed with the rolling code table from the EWS. Most likely it will need reprogramming at the dealer.
     
     

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    Buzzcock (28-07-2009)

  13. Similar problem fixed for no start issue for 2002 BMW E46 330D 
    #7
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    Hi Mate,

    Not sure if you've resolved your problem already, however I had a very similar issue that I managed to resolve. Seems when taking the leads for the jump point on the car (for cleaning manifold and putting in swirl blanks), this is what caused my issue.

    In short the car stalled on me while driving although all the lights and connections were working. The car would crank but not start. Spent 2 hours at the mechs, only to find out that not enough voltage was being supplied from the battery. Turns out the jump nut was not tightened enough, so would only pass through 10 volts instead of 12.8 which is needed to start the car. REMEMBER 12.8 volts is the minimum!

    So although the car would seem fine and everything else working, this small thing that you can have oversight of can start leading you do many various different issues. When scanning the car, it was coming up with Immobiliser EWS issues, Fuel Rail Low Pressure etc, all I guess were the cause of not enough Juice coming from the battery.

    Hope this helps, respond if any more info required.

    Naz
     
     

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    #8
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    hi you say the car turns over and the fuel pump runs , if this is the case , the EWS (immobiliser ) is ok , as the DME (fuel injection /ign control unit ) has grounded the fuel pump relay , so we can also rule out the DME relay wich is a common fault for failing . there is now two ways we can go from here , i will ask you when the car is cranking over can you hear the injectors ticking ? , you might want to get a long screw driver and put it on number i injector while some one cranks it over , i will wait for your reply .
     
     

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    Quote Originally Posted by nazrulamin52 View Post
    respond if any more info required.
    Quote Originally Posted by gunslinger1 View Post
    i will wait for your reply .
    you both replying to a thread that is from 2009
     
     

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    whoops . haha
     
     

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