>-----Original Message-----
>From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]
>On Behalf Of Liam O'Hagan
>Sent: Tuesday, February 24, 2004 4:47 PM
>To: PICLIST@MITVMA.MIT.EDU
>Subject: Re: [PICLIST] [EE]:Automotive Diagnostic Connector
>
>Hrmm I've just had a closer look at it and it doesn't appear to be an OBDII
>connector....
>
>Here's an outline: http://www.miata.net/garage/images/diagpins.gif

Are you working with a Miata? What year?

I believe the diagram you linked to is the connector under the hood just
above the left shock tower - definitely NOT an OBDII connector.

Here's a photo of the actual connector:
http://www.miata.net/garage/diag_cu.jpg

The following page gives a detailed description of the pinout:
http://members.iinet.net.au/%7Eple/
The fourth page of this .pdf shows what they all connect to:
http://www.madracki.com/miata/images/wiring/92diag.pdf
(BTW, it looks like they have documentation for nearly all years... just
change the "92diag.pdf" to "xxdiag.pdf", xx being your year.)

While the connector on the page is from an MX-6, not a Miata, it is
identical to the Miata's AFAIK, except that the Miata (my Miata, at least)
doesn't have pins in all the positions (i.e., some connector holes are
empty). In any case, I'm pretty sure the GND, TEN, and IG signals are in the
same place.

I'm not sure what you want to use the connector for, but here's a good
description of how to get diagnostic codes out of it:
http://www.miata.net/garage/faultcodes.html


Later Miatas (>= 1996) DO have an OBDII connector, but it's located in the
cockpit, under the dash on either the right or left side. It should be open,
and fairly easy to see.

- Robert
Silver 1992 Miata :-)))

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