Re: What is standard, and what's not?, Fiat Punto ECU

It helps a lot! Do you know if there exists some freeware
implementation of the KWP2000 for a PC, at least for the basic
communication protocol. A source code fragment would be great. Thank
you,
Fabio

Fabio--- In opendiag@y..., "sander_qv" <sander.qv@z...> wrote:
> Hello Fabio,
>
> The Fiat Punto (and I think all new european cars, also VW) uses
the
> kwp2000 (=?eobd) protocol. This is different from the protocol
> kwp1281 on the VWinfo page.
> In the files section of this group there are some documents about
the
> kwp2000 standard.
>
> For kwp2000 there are normally two ways to start the communication:
> the 5 baud and the fast initialization. The 5 baud init for kwp2000
> (and obd II) is a little different from the 5 baud init from
kwp1281,
> as at the end, the ECU does send an extra byte: the complement of
the
> ECU address. And it does not automatically send the ID, but it
waits
> for a request.
>
> For the motronic in the Fiat, you have to use ECU address 0x10 and
> (if used) tester address 0xf1 I believe.
>
> Hope this helps,
>
> Sander.

 
Received on Tue Aug 27 05:55:04 2002