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I just built a E92 programming harness , but I cannot connect or get the ECM to turn on. I believe my wiring diagram is correct. the ECM is drawing 26ma with switch off and 48 when switched on. I'm trying to connect with a gm MDI. I purchased the ECM used off ebay. any thoughts would be helpful
Last edited by sparkness; Feb 5, 2015 at 02:50 PM.
We use switched 12+ on 3 pins,51,70,73.
Also no need for the can buss terminating resistor.
Be sure you use a power supply good for at least 4 amps as any of the direct injection
Ecu's pull a lot of current to run the high voltage section and more computing power.
Steve
Im using a 5A bench supply set at 13.2V it has 40 mV ripple .I put +12V to pins 51,70,73 and could not read , my guess is a dead ecm, I will get another and try again. It was very dry in my office and I did have a static spark touching the case - maybe i blew it
O.K. I am able to read the new ECM with this cable the ECM draws 0 ma with power off and 280 ma with power switched on at 13.2V
next I will re-flash using SPS
I'm new to this site, and to programming any ECM. I have a 2015 LT1 corvette engine I want to install in my old 55 and was trying to figure out if I can hook up to the E92 computer myself and delete the security and any other things needed to make it run and came across your schematic which I could make but just not sure on the software and you meantioned SPS. I guess my main question is, can I just go on the ac delco site and pay the one vehicle $53 fee and potentially connect and delete what is needed from my computer? I had started looking at HP tuners and EFI live but really only want to delete what I need to to get it running. The engine was from a manual car and I am installing a 4L70e with standalone controller so I'm kind of thinking other than security delete, I might be okay??? Any help would be super appreciated. Thanks
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E92 Programming Harness 
