The 2JZGTE VVTi ECU pinouts and Body Loom wiring diagrams have been recently updated to include new information, this includes some additional the Auto (Tiptronic) pinouts and the BG1 connector body loom pins.
ECU Pinouts – http://www.2jzgarage.com/2012/01/supra-2jzgte-vvti-ecu-pinouts-97-8-02/
Body Loom Pinouts –http://www.2jzgarage.com/2012/01/supra-2jzgte-vvti-body-loom-pinouts-97-8-02/
Attached are both the wiring diagrams for the 2001 and also 2002-2005 Lexus IS300.
Disclaimer – I don’t take any responsibility for these diagrams, these do seem to be the factory wiring diagrams but I always like to double check / cross reference any wiring. Also I do not own a IS300 and can’t confirm these diagrams.
ECU Pinouts can be found here –http://www.2jzgarage.com/2013/04/lexus-is300-ecu-pinouts/
Someone had asked for these and I tracked them down, attached are both the ECU pinouts for the 2001 and also 2002-2005 Lexus IS300.
Disclaimer – I don’t take any responsibility for these diagrams, these do seem to be the factory pinout diagrams but I always like to double check / cross reference any wiring. Also I do not own a IS300 and can’t confirm these ECU pinouts.
2002_to_2005_IS300_ECU_Pinouts
Wiring Diagrams can be found here – http://www.2jzgarage.com/2013/04/is300-wiring-diagrams/
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.
2JZGTE
These are the body loom and other connector pins (from the orange plug in the footwell near the ECU – to the ABS plugs) – A big thanks to Wilbo (AU supraforums), Lacho (2JZGarage reader) and EMPEROR on (UK mkiv forums) *Note – You should be able to reference the wiring diagrams to the correct PIN and connector numbers, these tables just make it easier to read in some instances.
PDF – Body_Loom_Connectors
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.
These diagrams also include non-vvti diagrams, please ensure you check the year of model at top of diagram.
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.