From: Joseph Legris
X-Mailer: Mozilla 4.77 [en]C-SYMPA (Win95; U)
Subject: Re: Car speed conversion error
References: <3DDB30C2.D6EC77EB@autometer.de> <email@example.com> <firstname.lastname@example.org> <3DDE3D5E.BA2F499E@xympatico.ca>
Date: Sat, 23 Nov 2002 23:22:15 -0500
NNTP-Posting-Date: Sat, 23 Nov 2002 23:22:08 EST
Organization: Bell Sympatico
> In sci.electronics.design Joseph Legris wrote:
> > Hi Dan,
> > Is there any standardization of the data format on automotive
> > implementations of CAN? If so, which standards apply? If not, is there a
> > good source for this info?
> Where CAN is available on the OBDII connector (diagnostics port) it will
> often run at 50K or 500Kbps, and will often comply with the protocol
> defined in 'keyword 2000'. I cannot remember if there is a mandatory PID
> defined for ODO reading, but would not be surprised if there is.
> SAE have a book on on board diagnostics which IIRC gives some details, but
> quite a lot is left to the manufacturers discretion. Googling for "on board
> diagnostics" and OBDII may get you some results.
> It has been 6 months scince I had anything to do with implementing this
> stuff, and I still wake up shaking, the specs are that badly written!
> Regards, Dan.
> ** The email address *IS* valid, do NOT remove the spamblock
> And on the evening of the first day the lord said...........
> .... LX 1, GO!; and there was light.
Thanks for the reply. What does "keyword 2000" mean?
I have got most of the relevant SAE and ISO OBD-II standards
publications but, alas, none of them has an index. I am in the process
of compiling one.