RE: 92-93 LT1 stand alone ECM conversion
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Instructor
Joined: Nov 2005
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From: Toronto Ontario
RE: 92-93 LT1 stand alone ECM conversion
I am in the process of installing a Gen 7+ in a 93 LT1 Corvette (383). I have eliminated the GM PCM and managed to keep the cruise, traction control, speedo, all gauges, and AC all working properly. Any input on this subject would be great! Steve 
Safety Car
Joined: Feb 1999
Posts: 3,504
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From: Mexico Beach FL
This will be interesting, keep us informed.
Although I haven't tried it, this is my understanding:
It is my understanding that the CCM is the master computer and the ECM is a slave.
The CCM checks the key pellet and does a security "handshake" over the serial-bus with the ECM telling it if it is allowed to start the vehicle.
After the vehicle is started, the ECM can run the vehicle "stand alone", even if the CCM and the serial-bus communications go down.
It will be interesting if you can bypass the security "handshake."
Tom Piper
Although I haven't tried it, this is my understanding:
It is my understanding that the CCM is the master computer and the ECM is a slave.
The CCM checks the key pellet and does a security "handshake" over the serial-bus with the ECM telling it if it is allowed to start the vehicle.
After the vehicle is started, the ECM can run the vehicle "stand alone", even if the CCM and the serial-bus communications go down.
It will be interesting if you can bypass the security "handshake."
Tom Piper
and the dfi is the one you got for me. Steve keep me updated hope everything continues to go smooth 
Team Owner
Joined: Aug 2000
Posts: 40,156
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From: San Pedro CA
Originally Posted by tjwong
This should be very interesting. As far as I know most of the inputs and outputs that control the AC, speedo, traction control all come from either the PCM or the CCM.
