1994 E36 320i Auto, ECU,DME advice needed - Page 3

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Thread: 1994 E36 320i Auto, ECU,DME advice needed

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    #21
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    Quote Originally Posted by Ronnie View Post
    I have fault codes and live running data sheets for Siemens MS40/MS40.1 as fitted to the e36 320i 206S2 and 325i

    And the e36 328i had a Siemens ECU so that info is wrong
    Oh Well.....thats blown that theory out of the water!

    I found these part numbers for ECU's Bosch Motronic M3.1 which go in the E36 320,325, E34 520 & 525.

    0 261 200 402
    0 261 200 403
    0 261 200 405

    They were listed on the bottom of this page on Pelican

    http://www.pelicanparts.com/bmw/tech...DME-Repair.htm

    I also found some interesting info on this russian website

    http://translate.google.co.uk/transl...%3Den%26sa%3DG

    Note what it says at the bottom of the box with the BMW list.
     
     

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    #22
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    You definitely should have a Siemens ECU, MS40.1, see here http://tech.bentleypublishers.com/th...ssageID=252246

    And see here...... 5wk9002 ........ should be your ECU part number, try it in here http://www.injectronics.com.au/parts1.asp

    And here http://www.injectronics.com.au/bulle...ulletin_45.pdf

    Your car has early EWS, see here http://www.europeantransmissions.com...0EWS%20BMW.pdf, hence you will be able to swap ECU's from one car of the same year and type to another
     
     

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    Lez (13-12-2008)

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    #23
    Dr of BMW gildersol's Avatar
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    It's certainly confusing depending on where you look, and it dosen't seem to be very easy to find siemens units for sale.
    Glad its you who's looking and not me Only kidding mate.

    Beats me why so many sites claim that Bosch will fit if it won't, but then again I'm not an expert on these.
     
     

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    On the 320i e36

    Bosch M3.1 was up to around 09/1992
    Siemens MS40.1 was from around 09/1992 - 07/1995
    Siemens MS 41 was from around 10/1994 - 10/1999
     
     

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    #25
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    Thanks for doing all of that research for me Ronnie

    I am now totally convinced that you are right and I'm not going to read anymore of these websites that claim other things

    I'm going to take my DME apart again and using a magnifying glass, try to find out what is wrong with it. I put the car back on the diagnostics with the engine running and it came up with fault 75 indicating that there was no voltage going to the Lambda sensor. It says to check pin 73 on the DME to see if there is 5 volts coming from it. It also says that lines to the sensor could be at fault or the sensor is faulty, but I've just renewed the sensor.

    Once again, thanks for all your help over the last couple of weeks Ronnie
     
     

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    I was going to recommend the magnifying glass. that's what I did. The better the magnifying glass the better, as you can see the small areas of corrosion on the tracks/components etc.
    It may be an idea to carefully prise the ecu chip out of its base and blow out any crap then re-seat the chip carefully.
     
     

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    Lez (13-12-2008)

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    This could be useful for doing your checks. Pin 73 and 75 are oxygen sensor by the looks of it.
    Attached Files
     
     

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    #28
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    Quote Originally Posted by gildersol View Post
    I was going to recommend the magnifying glass. that's what I did. The better the magnifying glass the better, as you can see the small areas of corrosion on the tracks/components etc.
    It may be an idea to carefully prise the ecu chip out of its base and blow out any crap then re-seat the chip carefully.
    Cheers Gildersol, thanks for the advice
     
     

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    If you REALLY want to get complicated http://www.e34.de/tips_tricks/motronic/ms40.pdf
     
     

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    #30
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    Quote Originally Posted by Ronnie View Post
    If you REALLY want to get complicated http://www.e34.de/tips_tricks/motronic/ms40.pdf
    Cheers mate!
    I don't think I'll be going that far............wouldn't know where to start checking the solder is about the limit of my expertise
     
     

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