RE: [opendiag] Re: 1995 Opel diagnostic strategy change

Hi Brian here. If you can talk to your car With what have you used to make the comunication. What interface and what software. thanks Brian

"Page, John" <John.page@...> wrote:Brian,

Yes, that's what I understand. The Opel/Vauxhall diesels seem to have been
the first to be converted to EOBD compliance (and I'm not sure that they are
fully compliant, but that's another issue). Certainly in 1995 the Opel
strategy seems to have been to change the connector, but leave everything
else the same other than to separate the ECUs out onto separate lines, so it
was still ALDL. I'm not 100% certain about this, but the implication is that
ALDL and the later ISO 9141-2 standard are compatible at the physical level
(voltages etc) and certainly on my vehicle, which is a 1999 Vauxhall with
the 16-pin plug, the Engine Control Unit will talk to my laptop in ISO
9141-2 while I suspect (although I am not sure) that the other K-lines are
still ALDL (because the units themselves are unchanged from previous models.
There's a lot of guesswork here, so please use with care! I'm not sure what
baud rate all the pins use, mine seems to work quite happily on the ISO
standard 11. Quite what speed is in use on all the pins, I'm not sure but
the engine controller will talk to my laptop at the 10.4khz ISO standard. I
still haven't found out what protocol the Tech 2 uses to talk to my engine
controller, I suspect that it uses ALDL at 10.4khz with one of the KW
protocols - I can't make this part work with the Elmscan interface.

Certainly the Tech 2 diagnostic tool is able to talk to all of them, so they
must be compatible at some level.

Hope this helps...
John

-----Original Message-----
From: Brian Davies [mailto:ppugwash@...]
Sent: 14 October 2003 17:28
To: opendiag@yahoogroups.com
Subject: RE: [opendiag] Re: 1995 Opel diagnostic strategy change

John
Brian here in the UK. Are you saying that if I connect a an aldl interface
and software to the the pin that is the ecu info of the 16 pin connector pre
obd vauxhall opel i should read the info as it will be aldl info may be it
is worth a try hay.

"Page, John" <John.page@...> wrote:
Whatever the protocol - I'm pretty sure that it was ALDL - it was compatible
with the older Tech 1 diagnostic tool, as Opel produced an adaptor which
switched the 4 diagnostic leads on the new 16-pin connector to the Tech 1's
single diagnostic channel in the older 10-pin connector. So it seems 90%
certain that all four of the new pins used the same comms and application
protocols that were standard in the Tech 1 tool.

John

-----Original Message-----
From: Sebcio Lastowski [mailto:sebcio@...]
Sent: 14 October 2003 07:33
To: opendiag@yahoogroups.com
Subject: [opendiag] Re: 1995 Opel diagnostic strategy change

--- In opendiag@yahoogroups.com, "highlander" <gorgar@p...> wrote:

> DIAGNOSTIC CONNECTOR OBD-2 OPEL
> 4,5---GND
> 16----+12 POWER
> 3-----IMMOBILIZER,ALARM
> 6+7---ENGINE ECU [K+L-LINE]
> 8-----MULTYDISPLAY,AUTORADIO
> 12----ABS,AIRBAG (vectra,tigra)
> 7-----AIRBAG (omega)
> 13 or 14 - for Astra
> (This sw don`t work in Astra-G after 98 year)
> Opel Tigra 97 12 pin OBD2 je Airbag

hmm, I was always thinking that Opel/Vauxhall car engines are
using J1850 VPW protocol on pin 2, not ISO... So what the hell is
the protocol used by X16XEL engine (Multec S system) fitted to Astra
1.6 16V ??

Best regards,
Sebcio

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Received on Fri Oct 17 04:25:52 2003