im wondering if somehow the stock ecu isnt engaging the traction control because your not getting signals from the trac ecu. then again, im not that familiar wit hthe trac. it might actually be controlled by the trac ecu itself so might not be an issue at all. as for the wiring, i figured out the wiring for a swap into a mk2 supra. im not gonna use the stock wiring at all (have a ms2 on my current 7mgte swap, plan to upgrade to ms3 for the 2j) but this link should help. it has the pinouts for the aristo ecu. most likely the guy that made the harness just had the 7m starter wire go to pin f1 of the body plug, which im guessing he prolly cut off and just wired to the wire directly to make it cleaner.

heres how easy it is to start an aristo 2jz-gte


i still need to compression test my motor and then plug the vac leaks and run it again for a lil bit. once i do ill strip all the stuff off i dont need and sell it. turbos, fuel rail and injectors, harness, ecu, igniter, upper and lower intakes, oil cooler, motor mount brackets, hydro water pump setup, etc...