I'm not too sure about the US market - but over here in the UK, we've
got a range of books made by Haynes that disassemble all makes/models of
cars, reassemble them, and then write books telling the readers how to
do it and supply technical information along the way.

Personally, I've got a Ford Mondeo and thought several times about
dabbling in making an interface to talk to the ECU - given that the guys
at Haynes make it easy by giving pin-outs for the DLC connector (correct
acronym?) AND schematics for the ECU itself!

Having a quick search around to see what is already out there with
regards to pre-built diagnostic tools - I've found this interesting
interface which allows you to seemingly read fault codes/live data via a
serial link:

http://www.onboarddiagnostics.co.uk/interface/index.htm

Hmm. I wonder what that little black box is hiding, (coming back to the
list - I wonder if it contains a PIC?! It's interesting to see which
manufactures make use of our little friends!! ;)


Stuart


-----Original Message-----
From: piclist-bounces@MIT.EDU [mailto:piclist-bounces@MIT.EDU] On Behalf
Of Dave VanHorn
Sent: 18 October 2004 14:58
To: Microcontroller discussion list - Public.; Microcontroller
discussion list - Public.
Subject: Re: [OT] Diagnostic plug

At 02:54 AM 10/18/2004, Attila Muhi wrote:

>Hi list,
>
>
>I know, this is off topic, but I have tried Google, and have no idea
where 
>to search for this...
>
>
>I need the pinout for the diagnostic plug in my car. I have some
trouble 
>with the ABS brakes, and want to retrieve the fault code. As far as I
know 
>a slow pulse train should be available somewhere in that plug....
Probably 
>I won't need a pic to read the pulse train :-) , just a led or a scope.

>But which pin, and how do I interpret the code ?
>
>This seems to be a well hidden secret. !!!    Btw, it's a MB diesel,
year 
>1994.

This will be hard to find, it's OBD diagnostics, and the implementation 
varies according to manufacturer.  After 1996, there's OBD-II which
tells 
you more but still varies per manufacturer.


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