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Tech Tips, Tech Questions / Re: 1227730 ECM Step-by-step Conversion (with DIS)
« on: March 03, 2015, 09:42:58 am »The serial data is the one that provides data to the ALDL and the diagnostics test input is the one that when papercliped, puts everything into diagnostics modes. I only have a question about the light, which works on yours, so that's answered, but what about data? Are you able to pull down data from the 7730?
Keep in mind, these are questions I'm asking before I've installed everything..... so I'm probably jumping the gun.
The ac appears to be stand alone, but the 7730 needs to see when the compressor cycles to raise the idle via c9? Or is that d12?
Ron
What your touching on is probably my biggest challenge at the moment and your question might help solve the problem. Since doing 7730 conversion I have never had any success with getting my laptop to successfully communicate with the ECM using TunerPro. I've double checked wiring from the ECM to the ALDL plug and it all looks correct based on the pin-outs I have. I've always chalked it up to my lack of knowledge of setting up the proper BIN and ADX files. I always figured that so many others had done the same swap without any problems that it couldn't be a pinning issue. The last time I attempted to try TunerPro was last summer and I was finally able to see some readings but it was all garbled. For example the tach readings were all over the place even when the ignition was off. It could still be a setup issue I have with TunerPro, an incompatible ALDL cable, bad ECM or needing to re-pin the ECM with your information. It's to cold and we have to much snow at the moment but once it warms up I'll look into it some more.