V6 ALDL Communications

[Jeremy Gonyou]

Actually I was having some success last night.  Andrew pointed out that the 
ECM looks for the disable communications command (f4 56 08 ae)  *before* it 
responds to the fixed stream request.  By sending the disable command first 
I was able to get the fixed data stream, but the chatter wouldn't quit.  
I'll try sending the command to the BCM...

Thanks

Jeremy


>The "end communications" command is usually sent to the Body Control Module
>which usually has an id of $F1 so the command would/should be:
>$F1,$56,$08,$B1.
>
>I said should because it may not be the case in your situation - but its
>worth
>a try.
>
>Cheers
>Paul Blackmore
>
> > Date: Tue, 21 Nov 2000 00:39:21
> > From: "Jeremy Gonyou" <jgonyou at hotmail.com>
> > Subject: V6 ALDL Communications
> >
> > Hi guys,
> >
> > I'm having trouble talking to my sunbird ( 1993, 3.1 V6, 7730, mask $88,
>BCC
> > BATZ)  The thing seems to delve into chatter mode, regardless of what I
>sent
> > it.  I'm fairly certain that I know the correct commands because the
> > protocol is outlined in FreeScan.  I send it F4, 57, 01, 00, B4 for the
>data
> > stream but get junk back.  It won't even respond to the end 
>communications
> > command F4, 56, 08, AE - just sends more crap.
> >
> > I get these results with a few different computers and a couple of
>different
> > cars.  I believe other people on this list were having similar problems.
> > Has there been any resolution to this?  Anyone gotten a J or L - Body to
> > talk??
> >
> > Thanks
> >
> > Jeremy
>
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