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Thread: diagnostic port question ......

  1. #1
    Join Date
    Dec 2005
    Location
    VT
    Posts
    73

    Default diagnostic port question ......

    on my '95 E34 I have a round diagnostic port. When I take off the cap, there is a circuit board with pins inside the cap. What does the board and pins do?

    Thanks .......

  2. #2
    Join Date
    May 2004
    Location
    Japan
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    9,281

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