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Thread: The "Ding" device in my car

  1. #1
    Join Date
    Nov 2014
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    1992 BMW 850ia

    The "Ding" device in my car

    I did do some work repairing my AC and demounted the glove compartment and other details, among others the "ding thing" on the passenger side. For once I did take a picture of it and saw that there is 3 connections marked T1, T2 and T3. I wondered what sound the different connections will give and hooked the "ding-thing" to 12V. Connecting the T1,2,3 to (-) will produce a sound. The T2 sound very much like the warning sound for "Belt buckle". There is a "Drivers Seat Belt" switch connected to A25 (Body electronics module).

    T1: Repetitive dings with no decay with a frequency of about 2Hz
    T2: Repetitive dings with a decay with a slightly lower frequency than T1
    T3: A continuous ding as long as the pin is connected to (-) and a decay when the pin is released from (-)

    PICT0003.JPG

  2. #2
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    That's interesting stuff! One of the sockets is used exclusively in the Japanese market as a 'reversing' warning....
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  3. #3
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  4. #4
    Join Date
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    Thank you Shogun, but that one on YouTube doesn't look like the one I have. I saw a couple more looking like yours. Seems that they have a test button or something too.

  5. #5
    Join Date
    Nov 2014
    Location
    Vena, Sweden
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    1992 BMW 850ia
    Quote Originally Posted by Timm View Post
    That's interesting stuff! One of the sockets is used exclusively in the Japanese market as a 'reversing' warning....
    Yes, I found the indication of that in the ET-manual. But why warn the driver he is in reverse? The people outside will not hear the signal. I expected to find a connection to the backing-radar/parking assistance system some how, but not.

    Late Addition: I found this thread on YouTube: https://www.youtube.com/watch?v=l4oz3z50TR0

    His sounding device is not the same as mine but I have the single pole connector which as I understand is the connection for "reversing" sound. Then I ask what are the other connections meant to be?
    Last edited by peake; 09-21-2018 at 06:27 AM.

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