aldl cable/program

[D. Barry Stubbs]

chetwagner at uswest.net wrote:
> 
> I am having troubles with connecting to my cars computer.  I have a
> 7730 using the 8D code.  I have tried the two transistor aldl, the one
> with the four transistors and MAX232, and the straight MAX232,
> none of them seem to work.  I think I remember reading something
> about having to use some diodes on the 2 trans interface, maybe
> that is the problem with this one.  Where do the diodes go and what
> direction?  Maybe it is the software that I am using.  I have used
> carbytes, car chat, and EFILive, none seem to work with the car.
> The straight max232 does get an echo using car chat and carbytes,
> but the cars computer doesn't respond.  What am I doing wrong that
> I don't know about?  My AUTO XRAY scan tool works fine with the
> computer, for what it's worth.

Chet, what engine?  I had a problem reading the output from my 2.8 -
nothing would recognize it, but there was data there.  Slapped in a 3.1
PROM, and it worked OK. 

========================================================================
D. Barry Stubbs                                    http://surf.to/z24man
(912) 745-9429                                     AOL IM: thez24man
z24man at earthlink.net          BNet Member #828     ICQ #5409648
#101DSP MidGa Region SoloII   94 Q4 5spd Aqua Z26  88 2.8 5Spd White Z24
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