This is the 97-98 US MKIV Supra Service Manual.
Most of these documents are applicable to the J-SPEC and Europe-SPEC supras. There might be differences to driving side, wiring and some features and functions.
Disclaimer – I don’t take any responsibility for these diagrams, these are referenced off 2 different diagrams I have of the 2JZGTE vvti and some are in Japanese, it is possible that some could be incorrect wire colours or descriptions due to translation errors. If you are unsure please trace wires or deal with an auto electrical professional.