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Thread: E32 EDC doesnt work

  1. #1
    Join Date
    Mar 2018
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    Poland
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    My Cars
    E32 730iA M60

    E32 EDC doesnt work

    Hi.

    I have got a E32 735iA with EDC and LAD system and EDC system doesnt work.
    There is no reaction when I switch the button of EDC. Also none of mode is iluminated (I have new bulbs in there).

    I was trying to check this system by INPA, but it is issue free. In "read status" there is sport mode and all the time its sets as active. Theres no reaction when Im switching modes.

    I was replacing the button, but it didnt change anything. Also im wondering why I have got connection with EDC by INPA only on ACC, when I start engine, conneting is over. Thats strange, shuld it be in that way?

    Polish forums are totaly usless with such issue. Only solutions that I could find was to replace shock absorbers by normal...But I dont wont to do this.
    Last edited by warszawa24; 03-31-2018 at 07:48 PM.

  2. #2
    Join Date
    Jan 2005
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    11/88 E32 750iL+98 E36M3
    If it always in sports modus then the system is defective, that is the socalled "emergency" setting if something is wrong.
    Is it EDC I or EDC III ? EDCI is the older system and you can recognize it easily, because the cables come out at the top of the shock mount, EDCIII is much more complicated and there the cable goes out at the lower section of the shock. The advantage of EDC III is that it can be diagnosed, so probably your system is EDC III.

    I have not much experience, but from my wrenching buddies I know 3 of them had a bad EDC III control module. We bought used ones and the problems were solved on all 3 cases.
    Find a used EDC control module and try that. Check German Ebay for BMW E32 E34 E31 EDC Modul, for example here is one for EUR 35 https://www.ebay.de/itm/BMW-E31-E32-...8AAOSwnHZYfis~
    That is the going price, I also bought them from Germany for my friends.
    Shogun tricks and tips for the E32 series are HERE!

  3. #3
    Join Date
    Mar 2018
    Location
    Poland
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    My Cars
    E32 730iA M60
    I have EDC III version.

    So I"ll change my control unit then.

    Thank You very much for help, I will let You know if this will solve my problem.

  4. #4
    Join Date
    Mar 2013
    Location
    Green Bay, WI
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    My Cars
    1992 750il / 1991 560 SE
    On my 750iL, my EDC was dead when I first got it. Switch did not illuminate. New capacitors on the EDC module with a reflow of the solder joints and it was working again, until the struts themselves failed.
    ______________________________
    1992 750iL

  5. #5
    Join Date
    Mar 2018
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    Poland
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    My Cars
    E32 730iA M60
    It seems that one capacitor is done and one pin of IC Module is broken. Im wonder what kind of power has broken this pin








    BTW, I my rear headrest wosnt working. I have found one poor solder joint in control unit and now there working fine

  6. #6
    Join Date
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    1992 750il / 1991 560 SE
    Wow, I am surprised by that damage to the IC.
    ______________________________
    1992 750iL

  7. #7
    Join Date
    Mar 2018
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    Poland
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    E32 730iA M60
    My C.U. has been deliverd to "Electronic Store&Repair". They put new capacitor and told me that this pin of IC Module is factory un-plugged.
    EDC still doesnt work, but now I can connect to this system on eninge runing, before that I had have connection only on ACC.
    Should I take a risk and buy second-hand one?

  8. #8
    Join Date
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    11/88 E32 750iL+98 E36M3
    I would take the risk, new ones are very expensive.
    Shogun tricks and tips for the E32 series are HERE!

  9. #9
    Join Date
    Mar 2018
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    Poland
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    E32 730iA M60
    And unable to buy from dealer.

    I just bought one online in Poland, it costs me 7 Euro, so it was worth to took this risk heh
    I'll let You know if this was solution to my issue.

    BTW, this car has also LAD problem, I'm pretty sure that main problem is in valve, but also rear level-sensor has been removed from my car. Probably there was self-leveling alterts on instruments and someone has removed this. Does it heave something in common with EDC?
    Last edited by warszawa24; 04-04-2018 at 06:32 PM.

  10. #10
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    If the car has EDCIII and LAD, the rear shock is quite complicated. But I have never disassembled such a shock, do not know the details.
    As you live in Poland, maybe you contact Nagengast for a repair of the shocks.
    The rear level sensor is just a warning mechanism, probably removed/disconnected because there was the warning in the check control.
    Shogun tricks and tips for the E32 series are HERE!

  11. #11
    Join Date
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    E32 730iA M60
    I know then, I was sending some emails with them.
    But as long as I know they are reparing shocks when they are leaking. My are totally clean and leaking free.

  12. #12
    Join Date
    Mar 2013
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    1992 750il / 1991 560 SE
    IF they are not leaking, they are probably just fine for now.

    The seal for the LAD with EDC is unique. The seal needed at top is: K35-016 - 6 X 23,3 X 3,2 , PTFE/N

    I have been unable to locate this seal individually. So I can not repair the one I have leaking and have a non-EDC shock to install before I sell the car.
    ______________________________
    1992 750iL

  13. #13
    Join Date
    Mar 2018
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    Poland
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    E32 730iA M60
    Sure they are.
    In nova days a friend of my will take a look at my EDC control unit.

    But even if it will start working I'm not sure if I will ever use this system becouse my LAD doesnt work at all, I stoped driving this car. Rear susoension hight is at 62 cm (7 cm to high) and car is undriven becouse of this. I have new pressure acummulators, housing, fluid and tested power stering pump. Im sure that problem is in valve, I was opening it as much as I can to clean it but it doesnt change anything, suspension is not going to go down in a any way.

    Do You guys have this LAD valve for sale which is in 100% working?

    I find difucult to find any in my country. If I will not find it, I'll instal on car normal suspension.
    Last edited by warszawa24; 04-14-2018 at 04:02 PM.

  14. #14
    Join Date
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    11/88 E32 750iL+98 E36M3
    Find a used LAD regulating valve from E38, it fits and works on the E32, tested on the German 7 forum, but the lever you have to use from the old E32 regulating valve and mount the old lever on the new E38 regulating valve, because the lever is different, they say, not sure, maybe the shape or length.
    Shogun tricks and tips for the E32 series are HERE!

  15. #15
    Join Date
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    E32 730iA M60
    Thats wounderful new, thanx a lot

  16. #16
    Join Date
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    1992 750il / 1991 560 SE
    Its true that LAD does work with EDC. On US models, this is only for the rear as the front struts do not receive any hydraulic fluids. They are isolated. If EDC is not working, the fronts have a very harsh ride, much harsher than sport mode. With the rears, the hydraulic fluid circulates through the system providing the same fluid used inside the shock for EDC control. But even if LAD is not working right, there probably is fluid in the shock which EDC can regulate via internal valves. So even with LAD not working correctly, the EDC should operate. And if the computer is fixed, you will probably notice a ride difference. I did. That is until the fronts leaked and failed. Then one of the rears started to leak. The fronts I replaced with conventional struts. Basically, my EDC system is only operating the rears IF its working at all.
    ______________________________
    1992 750iL

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