Gerry,

        I'm very interested in this topic too.
        Check it out www.obdii.com

Ricardo Seixas

>I would like to make a tool for scanning the OBD II (On Board Diagnostics 2)
>system in my cars engine management unit.  I believe the system is CAN based
>and that the protocols are standard but don't seem to be able to find much
>about it  on the web. Could someone please point me to information about how
>to do this, ideally with a PC or with a PIC microcontroller? Is there a
>published Spec available?
>
>Thanks,
>Gerry Cox
>
>