545rfe ?s

GapRider said

Old thread but this it's the best info I've found so far.
I have an 03 Ram 5.7 545RFE. I want to use the factory TCU with aftermarket ECU.
I understand I need to provide the necessary inputs to the factory TCU - does anyone have info on that, even a wiring diagram would be great.
Thanks for any help!

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It looks the factory manual shows what I need except for the comm bus SCI connections (pins 7,46). Says those are for 'indirect' inputs from PCM like Body Identification, ECT, Target idle, MAP. That's a roadblock for me, I don't know how to satisfy those since they aren't direct, hardwire inputs. Anyone have any insight on that, any work arounds?