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Thread: E36 Front PDC

  1. #26
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    The connectors are a pig. Costly, and I can't find the USB one, which appears to be a + shape with a circular outer, with four pins in the + arrangement.

    Normally you just need to round the corners a bit to get them to fit.

    EDIT: Before - note right angled corner to fascia part.

    After, slight rounding.
    Last edited by Joylove; 05-24-2011 at 06:58 PM.

  2. #27
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    Quote Originally Posted by MParallel View Post
    Why use a ASC switch and not a E32/E34 PDC switch? Then it looks 100% original and already has the extra control light inside.

    PDC switch:

    Finally, I found that rare swith.... in Moscow



    Last edited by dancerst; 07-17-2011 at 02:28 PM.

  3. #28
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  4. #29
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    Quote Originally Posted by Joylove View Post
    Love it. Where did you get the flush mount recessed 3.5mm socket from?
    I made it myself ))


    You can look pictures here... http://www.e36club.ru/forum/showthread.php?t=181998
    Last edited by dancerst; 07-17-2011 at 02:35 PM.

  5. #30
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    How's did you wire the pdc switch? Already to the front pdc module? The wiring circuit of the switch seems a bit complicated. Is there a +12v coming on when pdc is turned on that activates the control light?
    1998 BMW M3 3.2 Cabrio • Alpinweiί III on Schwarz • German spec • 1 of 12
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  6. #31
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    Quote Originally Posted by MParallel View Post
    How's did you wire the pdc switch? Already to the front pdc module? The wiring circuit of the switch seems a bit complicated. Is there a +12v coming on when pdc is turned on that activates the control light?
    See attached diagramm
    Attached Files Attached Files

  7. #32
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    Unless the electrics are the same, you posted an E38 doc, while that pdc switch is e32 specific.
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  8. #33
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    PDC switch pinouts are the same.

  9. #34
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    Quote Originally Posted by dancerst View Post
    PDC switch pinouts are the same.
    Ah it's just the design. Well I already knew the pinouts, I just wonder where the +12v originates from that activates the green light. That diagram only lists 4 wires and none for the control light, unless the same source is used for both the amber light anf the green one.
    Last edited by MParallel; 07-19-2011 at 02:14 PM.
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  10. #35
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    How do you do the back PDC if you already have an auto dimming rear view mirror? Looks to be the same sensors to me?

  11. #36
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    Quote Originally Posted by JerCotter7 View Post
    How do you do the back PDC if you already have an auto dimming rear view mirror? Looks to be the same sensors to me?
    Totally different.

    PDC sensors are located in the rear bumper mouldings. The auto dimm mirror sensors are located in the mirror (one in the glass, one on the front. if more light at the glass side is measured compared to front, this means an external light source is behind the car and possibly blinding, thus the mirror dimms).
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  12. #37
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    So in that case I have the sensors in my car but for some reason or another they aren't working? I don't have any OBC. Just an analogue clock. The wires from the 4 sensors run into the car as well. So confusing.
    Last edited by shogun; 06-09-2020 at 08:10 PM.

  13. #38
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    Quote Originally Posted by MParallel View Post
    Ah it's just the design. Well I already knew the pinouts, I just wonder where the +12v originates from that activates the green light. That diagram only lists 4 wires and none for the control light, unless the same source is used for both the amber light anf the green one.
    Look carefuly to the right corner of diagramm.

    There’re 2 wires from PDC Module (1- momentary ground input, 2- control light output)

  14. #39
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    Quote Originally Posted by dancerst View Post
    Look carefuly to the right corner of diagramm.

    There’re 2 wires from PDC Module (1- momentary ground input, 2- control light output)
    I thought that was the night illumination for the "PDC" text.

    Quote Originally Posted by JerCotter7 View Post
    So in that case I have the sensors in my car but for some reason or another they aren't working? I don't have any OBC. Just an analogue clock. The wires from the 4 sensors run into the car as well. So confusing.
    What sensors? I don't understand? Do you have an auto dimm mirror, or pdc? Or both?

    Also, now you bring in the OBC, which has no relation to either PDC nor the mirror.

    Maybe someone put in the rear pdc sensor for show and didn't hook them up?
    Last edited by MParallel; 07-19-2011 at 05:58 PM. Reason: Automerged Doublepost
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  15. #40
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    Quote Originally Posted by MParallel View Post
    I thought that was the night illumination for the "PDC" text.
    For the «PDC» text there’s grey-red wire on the switch.

  16. #41
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    Quote Originally Posted by dancerst View Post
    For the «PDC» text there’s grey-red wire on the switch.
    Hmm yes I even saw that listed. I don't know what I was looking at. Must have looked to quickly.

    If I understand correctly and look at the switch diagram then

    pin 2: red/grey illumination
    pin 5: ground for both lights

    Then by pressing the switch pin 6 is powered, which turns on the PDC module and this module puts out power to pin 4 for the control light.

    Looks to work by some bi-polar transistors.

    Too bad it's a momentary switch and NO. I would like to make it NC so I could wire it in for my rear pdc as I'm not doing front PDC in the near future, maybe never.

    So my idea was to have the switch wired NC so I can put it in reverse and activate PDC, without having to also push the switch. Only to turn it off while in reverse if I would want to. And use the reverse wire +12v to turn the control light on.

    But I doubt if the E36 PDC module has an output for the control light, as the rear PDC never have a separate switch to turn it on off. Otherwise it will only be a dummy switch only for its control light in it.

    Or if I would want a difficult route, use an PDC module with front PDC and use the front sensors on the back so you use the circuit meant for the switch. But that seems like a waste of time and money.
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  17. #42
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    I’m not sure 100% (because I forgot) but I think E36 PDC Module can be wired with PDC switch. You can try it by putting momentary ground to pin 19.
    Last edited by shogun; 06-09-2020 at 08:11 PM.

  18. #43
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    I have the dimming mirror and PDC on the back bumper. Just no beeping when reversing. I thought it used the OBC to beep when getting close.
    Last edited by shogun; 06-09-2020 at 08:11 PM.

  19. #44
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    Quote Originally Posted by JerCotter7 View Post
    I have the dimming mirror and PDC on the back bumper. Just no beeping when reversing. I thought it used the OBC to beep when getting close.
    Open your trunk, pull back left «capret» cover and see if you have PDC Module.

  20. #45
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    Quote Originally Posted by JerCotter7 View Post
    I have the dimming mirror and PDC on the back bumper. Just no beeping when reversing. I thought it used the OBC to beep when getting close.
    As I (tried to) explain before. Well I did say it very clearly: there is no autodimm sensor in your bumper. The auto dimm sensor is inside the mirror.

    I do wonder why you think you have one in the bumper. I think you are confusing a part with something else.
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  21. #46
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    Quote Originally Posted by dancerst View Post
    Open your trunk, pull back left «capret» cover and see if you have PDC Module.
    Yeah got that, thanks. Now to figure out why it's not working then install them on the front as well.

    Quote Originally Posted by MParallel View Post
    As I (tried to) explain before. Well I did say it very clearly: there is no autodimm sensor in your bumper. The auto dimm sensor is inside the mirror.

    I do wonder why you think you have one in the bumper. I think you are confusing a part with something else.
    What I was trying to say in the post was that I have both. But my PDC isn't working and I knew there was wiring going into the car from the sensors. I always, wrongly, assumed that it was for the auto dimming mirror.

    I now know that the sensors in my bumper are for the PDC and not the mirror.


    EDIT: Where is the actual beeper? All 4 sensors are clicking when in reverse.
    Last edited by JerCotter7; 07-20-2011 at 01:29 PM.

  22. #47
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    Under the steering wheel. Unless it's a retrofit kit, then It will be in boot(trunk).
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  23. #48
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    Quote Originally Posted by MParallel View Post
    Under the steering wheel. Unless it's a retrofit kit, then It will be in boot(trunk).
    Thanks. The wires were under the steering wheel and there was also a blue wire that has to be connected to the same speaker so I'll have to find out what that is too. Pity someone removed the speaker so I have to order one from ebay.

  24. #49
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    Pdc

    I am just starting doing this now, will have to relocate the alarm led in order to make room for PDC switch in there (all other switch slots are taken).
    Will keep you posted once finished.

  25. #50
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    Quote Originally Posted by M3C
    I am just starting doing this now, will have to relocate the alarm led in order to make room for PDC switch in there (all other switch slots are taken).
    Will keep you posted once finished.
    Don't forget to take photos during installation

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