This is a TRAC and ABS system technical training article from Lexus, it shows the Toyota Supra (and Camry) Traction Control System (TRAC), ABS system and how they all work together with the ECU’s.
These documents can give further troubleshooting steps to the service manual and give a better understanding of the system in general.
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/
Found in the 97.9-02 JDM Toyota Supra (RZ and SZ-R only) was the REAS suspension system – REAS (Relative Absorber System) shock absorber system.
I was lucky enough to have this suspension in my supra before I swapped it out a few years ago for some HKS hypermax coilovers.
I’ve posted a link below with some information on the system and also one of my favourite pictures of the supra, a chassis picture without the shell showing the REAS suspension.
Basically it was to improve ride comfort while still having good flat cornering ability. I’ve also put some pictures of mine when I pulled it out, I still have this available although I’m not sure if they can be re-filled or re-used.
(Translation from Toyota Japan – hence the japanese-english translation wording!)
REAS (Relative Absorber System) for comfortable ride and high handlings stability.
The REAS features an entirely new mechanism that functions not only to achieve a comfortable ride with a relatively small amount of damping force in cases like when both tires hit a gap in the road, but also functions to stabilize the body of the automobile against lateral “rolling” motion by adding a suitable amount of extra damping force and absorb the force acting in the lateral roll direction, as when cornering, when the pattern of depressions and protrusions in the road surface are different on the left and right wheel sides or when subjected to cross winds. Three main points of the REAS structure are as follows
1. The left and right shock absorbers have separate oil chambers with a REAS valve positioned on the connection flow passage.
2A single gas chamber is shared by the left and right.
3. Using the separate actions of hydraulic fluid and gas, a separating piston is activated by the coupled movements from the right and left.
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.
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.
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.
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
