That's right.

Months ago I tried to find out that specific protocol, and found
nothing... the only thing found was lots of text about the protocol
message codes, and advertizement, nothing related to the communication
layers itself.
It would be really nice to have an extended message on board, other than
"Service Engine Soon"... :)
Wagner.



jamesp@intertex.net wrote:
>
>  Wagner,
>
>  This is sort of the case today regarding diagnostic
>  capabilities using OBD-II (On Board Diagnostics 2).
>  This standard utilizes one connector for any make or
>  model, and the error messages have been standardized
>  to an extent.  By that I mean there are a group of
>  error messages that are common between all makes and
>  models taht cover the basic failures common on all
>  vehicles. ...
[snip]