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/
After seeing an incorrect 2jzgte vvti coil and wiring diagram online I quickly put a simple one together that will come in handy! This is useful for working on the coils and igniter, please refer to more in-depth wiring diagrams when tracing wiring or working on more in depth wiring problems such as the VVTi wiring diargams you can find HERE.
Yes the coils are numbered 1,3,2!!!
I have confirmed this with IS300 workshop manual, Japanese wiring diagrams and also my own car.
After reponding to a question on here I figured it made sense to host a link of this IS300 2JZGTE VVTi swap manual. Although I didn’t do the swap personally or own an IS300 I think it’s a great swap write up that applies to most late model 2JZGTE VVTi swaps and engine swaps in general.
The document also contains information I have provided over the years on supraforums and has pictures I have provided.
IS300 2JZGTE VVTi Swap Manual Download – IS300 2jz-gte Swap Manual
A big thanks to Indirocz28 from http://my.is/forums/.
As a side note please don’t reference the pinouts in the manual, if the author ever updates the word document with my new pinouts I will re-upload.
***UPDATE – IS300 ECU pinouts can be found here – http://www.2jzgarage.com/2013/04/lexus-is300-ecu-pinouts/ and IS300 Wiring Diagrams can be found here – http://www.2jzgarage.com/2013/04/is300-wiring-diagrams/
You can also still use the ones I have posted here for the 2jzgte vvti.
http://www.2jzgarage.com/2012/01/supra-2jzgte-vvti-ecu-pinouts-97-8-02/
http://www.2jzgarage.com/2012/01/supra-2jzgte-vvti-body-loom-pinouts-97-8-02/
http://www.2jzgarage.com/2012/01/supra-2jzgte-vvti-wiring-diagrams-97-8-02/