OBD II info

[Steven Gorkowski]

I'm a SAE member sometimes the stuff is cheaper that way. I will order it if you
want. Just contact me off line.

Steve


Clive Apps Techno-Logicals 416 510 0020 wrote:

> just grabbed this from another list
>
> I have the 1996 Ford powertrain manual (PTM), and it has a fair amount
> of info on the OBD II stuff including:
>
> - Pinout on the Data Link Connector (DLC).
> - Descriptions of the Parameter IDs (PID).
> - Description of the communication codes to tell the Diagnostic tools to
> perform tests such as the KOER test.
> - The Diagnostic Trouble Codes (DTC) for all 96 Fords which may apply to
> other years.
>
> What it doesn't have is the communication protocols for talking to the
> On Board Computer through the DLC, soooo...I did a little poking around
> at the SAE web site and I found the following pertinent docs:
>
>         http://www.sae.org/PRODSERV/stds/J2201.htm - OBD-II interface description
>         http://www.sae.org/PRODSERV/stds/J1850.htm - Communications protocol
>
> Each of those docs is $62. Now, I'm not overly motivated to shell out $60
>
> Well, I did a little more surfing and found:
>
>         http://chimera.acs.ttu.edu/~z7d23/research.html
>
> which seems to be a copy of J2201. This mentions that there are 3 possible
> communication protocols that a DLC can connect on (two of which are J1850
> variants, the third is an ISO communications standard). I also found:
>
>         http://efi332.eng.ohio-state.edu/diy_efi/archive/archive_num_60
>
> which mentions that someone else is working on building a scan tool. Might
> want to talk to them.
>
> I'll be happy to share the info that is in the PTM with anyone who's willing
> to help with a "low cost" scan tool project, but it's 60-odd pages of info,
> so faxing it around the internet isn't exactly practical. The DLC pinout is
> described in the middle of http://chimera.acs.ttu.edu/~z7d23/research.html
>
> Feel free to forward all or part of this message to anyone else who might help
> this project along.
>
> Seth Mleziva <ssm at ici.net>