Daicom craps out again.....

[Shannen Durphey]

I've had some problems with "real" scan tools and 90+91 Vettes.  Serial data is
output on pin M of the ALDL, while the Airbag controller (DERM) is connected to
terminal L. L and M are tied together in the parallel interface cable.  I
suggest trying jumper wires and connecting only pins A, B, and M between the
ALDL and the cable end.  This eliminated the possibility of interference with
the DERM.
See reference page: 
ftp://ftp.diy-efi.org/pub/gmecm/manuals/1227730/90-7727V8TPI-7.jpg

Shannen

Craig M. wrote:
> 
> > Let me start off by saying hello as this is my first post. Been
> lurking
> > for
> > a while. Anyhow, doesn't the 730 use a different data line pin on the
> > ALDL?
> > This may be the cause why it won't hhok up and I think there was just
> a
> > thread on this very same problem on thirdgen.org DIY prom board. I'm
> not
> > absolutely positive on this though.
> >
> > Hector
> > http://soflaspeed.freeservers.com
> 
> I noticed those posts, too... but on a stock car I shouldn't have to be
> re-wiring anything, should I? I've got both adapters that comes with
> Diacom, the '81 and up, and the 'special TPI', and neither one work on
> this '90 vette.
> 
> Craig M.
> 
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