Diagnostic plug

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adam_2922
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Post Wed Apr 10, 2013 8:44 pm

Where is the diagnostic plug on an m40 engine (318i cab)?
broadie
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Post Wed Apr 10, 2013 9:00 pm

Round cap next to the fuse box. I think!
FinalD
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Post Wed Apr 10, 2013 9:09 pm

Do you have the right hardware and software to read any codes/information?

The port is indeed the round cap with 21pins underneath it.

Something I ended up realising with the E30 is that it is largely pointless using diag software.
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adam_2922
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Post Wed Apr 10, 2013 9:53 pm

Its just to turn the service lights off. That is all.
FinalD
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Post Wed Apr 10, 2013 9:54 pm

In that case, a paperclip is all you need on it, really very useful piece of technology. :D