One Response to “Re: Schematics or details on GM computers”

1. admin says:

   03.02.2010 at 11:15

    lputc…@digi.lonestar.org (Leo Putchinski) writes:

   >Several friends and I have had problems lately with the on-board computer in
   >GM cars. Does anyone know of a source of a schematic diagram for these beasts.

   forget about it!

   >Alternately does anyone know of the source of a definition of the interface to
   >the diagnostic connector. i.e. what is the output data format for the
   >connector once the proper input signal is activitated to tell the computer to
   >start outputting data.

   whatever it is, it’s funky and can change from year to year, although
   a small set of connectors will get you connected to just about any
   semi late model GM car.  Ed Rinda Labs makes a set of connectors and
   software which make a really peachy package (satisfied customer me).

   the connectors connect to a PC parallel port.  
   bidirectional PC parallel port stuff is funky, before you
   even get to the GM ECM.

   >I have a diagnostic tester for GM computers which I bought at a flea market.
   >It works quite well for working on "run-of-the-mill" problems. I’m now
   >interested in getting a bit deeper into the operation of the computer itself.

   what sort of tester do you have?
   with the Rinda tester, you can monitor about 50 parameters in
   real time (updated every second or so).  that’s with a TPI motor.
   there are fewer

   >Any informationn will be appreciated.

   yeah?  any information?  how’s this:  10010010001010101111110100101010101

   >thanks

   peace!

   /eli

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