Re: Seed & Key KWP2000 at VDO ECUs

The ECU is Central Electonic, it works as gateway to CAN for the
dashboard which has no own k-line.

The Key's last Byte even i read in Mercedes-Benz specification. There
are also descrbed the answer codes.
35 is unvalid key. After Receiption of the answer the next answer is
36 what means to power off for testing again.

--- In opendiag@yahoogroups.com, "Marcus Wu" <riptide@d...> wrote:
> How did you learn of the key's last byte always being even?
>
> - Marcus Wu
> riptide@d...
>
> >
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> > Does anybody knows something about key calculation of VDO ECUs,
e.g.
> > dashboard?
> >
> > I send Command request key
> > ECU delivers two Bytes &quot;Seed&quot; last Bit is always odd
> > unknown calculation on Seed delivers the Key, last Bit is always
even
> > I send Key Bytes and receiver invalid key message because of the
> > unknown calculation
> >
> > (2s complement does not work)
> >
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Received on Sun Jun 29 02:56:36 2003