Category Archives: Tech Articles

List of all upgrades, how to’s, diagrams and other related information

2005 – IS300 Service Manual

Thought I’d had these posted but realised I hadn’t, this is the 2005 IS300 workshop manual pages. These come in handy for the VVTi guys due to the VVTi head torque and specs, most apply to the 2JZGE and 2JZGTE VVTi figures.

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.

Continue reading 2005 – IS300 Service Manual

Cleaning 2JZ VVTi Oil Control Valve (OCV)

This is a guide to cleaning the VVTi Oil Control Valve (OCV) and filter on the 2JZGTE or 2JZGE VVTi engine. This is the valve the controls the oil pressure sent to the VVTi intake cam gear assembly. This can be done as preventive maintenance, to replace with new components or if there are error codes. I’ve seen various forums that mention code 59 for supra and P1329 for IS300/Aristo which may be cleared by cleaning the OCV if there are issues with the VVTi system.

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ETCS-i / DBW System Troubleshooting

This article is to help out with the troubleshooting of the ETCS-i (Electronic Throttle Control System intelligence)also otherwise known as the DBW (Drive By Wire) system found on the 2JZ GE and GTE VVTi, this article is aimed at the supra but may also to apply to the JZS161 Aristo or any other ETCS-i equipped Toyota/Lexus vehicle.

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LS2 LQ9 Coil Installation

UPDATE – 420kw @ 24.5psi, big thanks to Rick @ Mojo performance and Glen @ ESP Racing Queanbeyan, dyno sheets listed below. This made another 30rwkw+ (40rwhp+) on very similar boost.

UPDATE 2 – Thanks to Steve at Torque Toyota for the attached diagram below of the 2JZGTE VVTi ignition wiring to match the Mojo kit.

Mojo_VVTi_Wiring

UPDATE 3 – The car has since made 486kw @ 24.5psi on e85.

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After many months of troubleshooting my ignition issues as seen in this post HERE I finally came to the realisation that the stock igniter setup wasn’t going to work with my requirements. I didn’t want any complicated aftermarket igniter or alternative solutions so I did some further research and came across the LS2 LQ9 kit from Mojo Performance. After reading some great reviews on supraforums –  I ended up purchasing them.

Rick from Mojo Performance was great to deal with, gave plenty of support and info and was very responsive via email considering the time differences between Australia and the US! In short it is a great bit of kit, easy to install, clear instructions and they resolved my ignition issues and I no longer have any break up of ignition on the road, although I’m yet to get back to the dyno and push it to it’s limits, this is where I used to get the worst issues.

Below is some basic installation steps on the kit for my 2JZGTE VVTi, I haven’t gone into the wiring too much as the diagrams are provided and will vary depending on your setup and aftermarket ECU, but there is the diagram above (See – UPDATE 2) to assist for stock setups . For those wanting to run the coils on the stock ECU you will need to purchase an additional module to generate an IGF signal for it to work correctly. The kit is available for 2JZGE and 2JZGTE non-vvti and vvti.

Some specific notes to my installation – I used the stock igniter wiring by cutting off the existing stock connector and soldering loom, I used the stock noise filter, I hid it away down near the front shock tower. The coils were wired in wasted spark, 3x ViPEC V88 ECU outputs used to drive them, this is possible as each coil has an igniter, but as always please refer to your specific ECU setup and wiring requirements. Currently running 3.5ms dwell.

This is the what is provided in the kit, all required hardware, quality wiring looms and instructions with wiring diagrams
2880

Continue reading LS2 LQ9 Coil Installation

IS300 Wiring Diagrams

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.

2001_IS300_Wiring_Diagram

2002_to_2005_Wiring_Diagram

ECU Pinouts can be found here  –http://www.2jzgarage.com/2013/04/lexus-is300-ecu-pinouts/

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.

2001_IS300_ECU_Pinouts

2002_to_2005_IS300_ECU_Pinouts
Wiring Diagrams can be found here – http://www.2jzgarage.com/2013/04/is300-wiring-diagrams/

2JZGTE VVTi Coil and Igniter Diagram

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.

2JZGTE_VVTi_Igniter_Coils

2JZGTE VVTi Ignition Issues

***UPDATE – Never put the word resolved with car issues until you are 100% sure! I never really resolved the issue, the 2jzgte vvti igniter seems to have limitations, I ended up going to a LS2 LQ9 Coil setup, info on the kit and installation can be found HERE

Everything posted below is what I did to minimise the issue but I did start having ignition issues again, I’ve amended the post below with all the updated information. I’m going to change from the stock 2JZGTE VVTi coils, leads and DH61 igniter to the LS2 LQ9 coils and report back my findings. I think there is fundamentally an issue with pushing higher boost and power with the stock DH61 igniter***

Have ignition issues? Never under-estimate the importance of the correct spark plug heat range!

For a while now I have had varying levels of spark blow out or ignition break down at anything over 23psi which I though were just bad coil packs, here are some of the things that were occurring, what I replaced and what I did to resolve it;

Continue reading 2JZGTE VVTi Ignition Issues

2JZGTE VVTi OBD Scanning and Information

While I had a stock engine and ECU I really strugged to find much information or tools to scan the 2JZGTE VVTi engine in my supra, standard OBDII tools did not seem to work. Some guys had tried and failed or got mixed results. I did find a guy in the UK that found out how, but it seemed one of his friends was a Toyota Mechanic and had access to an expensive scanner tool which wasn’t an option for me.

I’ve hopefully now found some basic information for the Toyota Supra 2JZGTE VVTi ECU;

-Is not OBDII compliant, it uses an JOBD compliant protocol as it’s a Japanese ECU –
-Uses a OBDII connector but requires a scan tool with correct software to read the correct protocol which is ISO 14230

It now seems like there is a cheap solution for reading the protocol; Thanks to Muzzytt on supraforums.com.au and Konrad on mkivsupra.net for sharing this information around on the forums.

Continue reading 2JZGTE VVTi OBD Scanning and Information