ALDL on V6 Cavalier

[rr]

I tapped the data stream using a basic aldl to PC cable. 
This allowed the data to be converted to RS-232 levels
that the serial port could use. Then used a terminal
program to capture the data stream.

It was a receive only process. I let the scan tool do
all of the bidirectional talking.

BobR.



On Mon, 17 Sep 2001 02:35:09 +0000
 "Eric S" <eric654321 at hotmail.com> wrote:
> Woah! wait a minute, there's my answer! (I think)  I have
> an OTC 2000 
> scantool for my car, it obviously hass all the request
> codes and lookups 
> already stored in it.  How dod you monitor what it was
> saying to the ECM?
> 
> 
> >From: rr <RRauscher at nni.com>
> >Reply-To: diy_efi at diy-efi.org
> >To: diy_efi at diy-efi.org
> >Subject: Re: ALDL on V6 Cavalier
> >Date: Sun, 16 Sep 2001 10:11:22 -0400
> >
> >
> >I had trouble talking to an $88 mask '730 ECM. What I
> finally did was
> >to connect to the ECM using a regular scan tool. By
> tapping into and
> >capturing the data stream I was able to see the required
> commands.
> >
> >With that information I was then able to connect with
> the home brew tools.
> >The command bytes were different from any of the others
> I had seen.
> >
> >The no chatter string:
> >
> >     F0 55 BB
> >
> >The normal ALDL request string:
> >
> >     F0 56 01 B9
> >
> >BobR.
> >
> >Rodney Fulk wrote:
> >
> > > Well if you get it working let me know.. I have an
> '89 Z24 I would like 
> >to
> > > be able to "talk" to.
> > > I tried to get EFlive working with my '94 Caprice and
> I gave up on it. I
> > > have other SW now to talk to my LT1 but nothing to
> talk to my Z24.
> > >
> > > -----Original Message-----
> > > From: owner-diy_efi at diy-efi.org
> [mailto:owner-diy_efi at diy-efi.org]On
> > > Behalf Of Eric S
> > > Sent: Saturday, September 15, 2001 2:04 PM
> > > To: diy_efi at diy-efi.org
> > > Subject: ALDL on V6 Cavalier
> > >
> > > Ok, I am trying to get an ALDL interface cable
> working on my 1990 
> >cavalier
> > > Z24 5 Speed.  I've got a number of different
> programs, Carchat, and 
> >EFIlive.
> > >   I got the cable from AKM, but I can't get the
> interface to work.  I've 
> >got
> > > a sheet which shows the ECM request codes, but no
> matter how I configure
> > > these programs, I am still having no luck!
> > >
> > > 127730 Computer, ATMF5241 Broadcast code.
> > >
> > > _________________________________________________________________
> >
> >---------------------------------------------------------
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