Re: GM diagnostic harness

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Article #10966

#10966

From: Randy Agee
Date: Thu, 01 Oct 1992 13:28

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I read Joe's request for info with extreme interest.  I also
have a GM car with an ECM.  I know from service manuals and
experience that I can get the "hard" fault codes out of the
computer by placing a jumper over two terminals and reading the
flashes on the Service Engine Soon Light.  I also know that
with the proper SCAN tool that all the sensors can be polled and
the various voltage levels that control the spark advance, fuel
injection, etc. can be be monitored.  I am extremely interested
in pursuing the analysis of this data.  I see no reason why a
portable PC with the proper connector and software could not
analyse the data stream through the RS-232 port, for example.
Is there something already out there?  Does any one have info
or know where to find it to develop the software?  Responses
here or by E-Mail would be greatly appreciated.  My local GM
folks just look at me like I am crazy when I ask about
documentation on the data stream.

ragee@vdoe386.vak12ed.edu
Randy T. Agee (ARS WB4BZX)
-- 
================================
Randy T. Agee                     
Virginia Department of Education
Richmond, VA

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Message-ID: <1992Oct01.132801.7028@vdoe386.vak12ed.edu>

Path: arc1-ca.pugleaf.net!sparky!uunet!caen!uvaarpa!vdoe386!ragee

References: <1992Sep24.134143.23375@ll.mit.edu>

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Newsgroups: sci.electronics,rec.autos.tech
Path: arc1-ca.pugleaf.net!sparky!uunet!caen!uvaarpa!vdoe386!ragee
From: ragee@vdoe386.vak12ed.edu (Randy Agee)
Subject: Re: GM diagnostic harness
Message-ID: <1992Oct01.132801.7028@vdoe386.vak12ed.edu>
Organization: Virginia's Public Education Network (Richmond)
References: <1992Sep24.134143.23375@ll.mit.edu>
Date: Thu, 01 Oct 92 13:28:01 GMT
Lines: 24

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