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References: <3DCDB1A5.34E114E3@bellatlantic.net> <3DCFBAF5.94BFFDC9@xympatico.ca>
Subject: Re: CAN Protocol and SAE J1850, ISO9141 and J1939
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
Date: Mon, 11 Nov 2002 16:40:50 -0800
NNTP-Posting-Date: Mon, 11 Nov 2002 16:38:54 MET
Organization: @Home Network
"Joseph Legris" wrote in message
> Jeroen wrote:
> > "Amy" wrote in message
> > news:firstname.lastname@example.org...
> > > Thanks for all the suggestions! I need to get speed information
> > > directly from the bus because the pulse information from the vehicle
> > > speed sensor could be increased if a pulse generator (something like a
> > > timer) were connected.
> > >
> > > Imagine the scenarion when a car is running, would I be able to get
> > > speed info without sending a request as
> > > 1) the speed is changing at every instant (so it got sent out
> > > voluntarily) or
> > > 2) the dashboard requests the speed information to show it on the
> > > speedometer (dashboard initiated the request)?
> > >
> > > Thanks a lot again for your help!
> > >
> > > Amy
> > >
> > > garwood wrote in message
> > news:<3DCDB1A5.34E114E3@bellatlantic.net>...
> > > > why don't you try to go to the vss (vehicle speed sensor) typical
> > > > or 8000 pulses per mile. you can calibrate pulses per time get
> > > >
> > > > gary
> > There are modules that convert speed info on the CAN bus to a regular
> > train. Don't have a pointer though...
> > Jeroen
> Does anybody know which vehicles implement CAN, or how this can be
> discovered? Also, what is the relationship between ISO9141 and CAN, if
> any? How about between SAE J1939 and CAN?
I know that Ford used what they call 'multiplex' in their now out of
production Scorpio. But that was only for central door locking, power
windows and power sunroof. It could have been CAN but for this simple
system, I guess they used something much simpler.
I think CAN and the like is mainly used in high-end cars where the savings
by using CAN or something similar are substantial.
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