Re: Vauxhall Vectra (1997) ecu communication

--- In opendiag@yahoogroups.com, radix <juglandis@g...> wrote:
> What I know it is KW82. Low init 5bps and 200bps? switch to 9600bps
more
> see below.
>
> radix
>
> ianmacnor schrieb:
>
> >Sirs
> >
> >I have been trying to communicate with my Vauxhall Vectra (X18XE
> >engine with Simtec 56.5 ECU) using my PC and a "Jeff Noxon"
> >interface. I have searched everywhere for some hints or
> >information on this vehicle and have found absolutely nothing. I
have
> >studied and tried ODB2, KWP2000, 10400 baud, handshake bytes etc. -

> >all to no avail. So, experiment I did.
> >
> >Wake-up was the first hurdle. I tried sending every character from
> >0x00 to 0xFF at 5 baud 8/N/1 and looked for a response at 10400
baud.
> >I got a response only from 0xE0 but could make no sense of the
> >characters I was receiving. After examining the bit pattern I
changed
> >the baud rate to 4800 and received back 0x55 0x52 0x80 which
looked
> >
> >
> 0x55 syc. byte and then first and second key byte(response
7,O,1 ?),
> send inverted second key 0x7F ok
>

>
>
> >sensible, although not understood.
> >
> >What then to send back to the ECU? After a delay of 25mS, I tried
> >every character and checked for a response. 0x7F worked and the
ECU
> >then continuously sent out
> >90569797 0696 0696 3897 013 3 which looked like it might be some
sort
> >
> >
> read ID 90569797 = Part number, 3897 = week, year of production.
The
> rest are hardware software info.
>
> >of identification together with date codes (the car was built in
late
> >1997). I responded with 0x7F again and received
> >0x06 0xF0 0x55 0x10 0x32 0x10 0x01 0x9D which again looked
> >intelligible.
> >
> >0x06 - 6 bytes to follow
> >0xF0 0x55 0x10 0x32 0x10 0x01 - the 6 bytes
> >0x9D - a checksum (equal to sum of all the other bytes)
> >
> >I am now in the position of many other opendiag members in trying
to
> >work out the meaning of these codes as they are unrecognisable as
> >KWP2000 codes. Is 0xF0 the "tester" address and 0x55 the ECU
address?
> >What does 0x10 0x32 0x10 0x01 mean? What do I respond with?
> >
> >Sequence so far (PC set to 4800 baud) 4800bps to 10400bps are
possible, standard is 9600bps
> >PC 0xE0 (at 5 baud using bit-bang method) OK use it
> >ECU 0x55 0x52 0x80 (this is repeated once more if I don't respond)
> >PC 0x7F (after 25mS)
> >ECU 90569797 0696 0696 3897 013 3
> >PC 0x7F (after 25mS)
> >ECU 0x06 0xF0 0x55 0x10 0x32 0x10 0x01 0x9D
> >?
> >
> >If I don't make the PC respond after 25mS then the ECU continues
to
> >output its data continuously.
> >
> >Regards
> >
> >Ian McFarlane
> >
> >
> >
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> >
> >
> >
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http://docs.yahoo.com/info/terms/
> >
> >can you say what software was used for this trial and what pin you
connected to and what interface. Brian in the UK ok
> >
> >
> >

 
Received on Wed Oct 15 05:30:49 2003