Re: ALDL European version

["alexpeper" <alexpeper@email.msn.com>]

I have a rs232 to ISO 9141 converter cable.  Also sold 20,
3-protocol chips
to Mobiltex for some unknown use in Jan.
Alex C. Peper
http://www.obd-2.com
----- Original Message -----
From: Peter Gargano <peter@techedge.com.au>
To: <gmecm@diy-efi.org>
Sent: Tuesday, August 15, 2000 10:49 PM
Subject: Re: ALDL European version


> Thanks Alex...
>
> alexpeper wrote:
> >=20
> > This is the ISO 9141 initialization,  possible used for
some
> > Euro Bosch GM, such  as Opel or Geo.  Car will then
return
> > $55 to determine baud rate.
> > Alex
>
> Here's some info I found (check out the links too!).
Anyone have
> a better link?
>
> Anyone played with this protocol? (my own interest is
purely=20
> academic at this point).
>
> from  http://www.mobiltex.com/~skornak/obd2.html ...
>
>   ISO9141-2 =96 This is the 10.4kbps asynchronous protocol
used=20
>   mainly on Chrysler, European, and Asian vehicles.  The
protocol
>   messages are the J1850 messages but the physical
interface is=20
>   different.   The protocol bit format is the same as
an=20
>   asynchronous PC serial port but the unique bit rate and
voltages
>   require a converter to be used for PC to vehicle
communications. =20
>   A slow 5bps handshake sequence is require to initialize
the ISO=20
>   interface to start communications.  Most vehicles will
terminate
>   the communications session if a command is not received
for 5=20
>   seconds.  Single wire.
> ----------------------------------------------------------
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