This site contains car modification and auto upgrade information specifically for the turbo import Toyota JZX90 MarkII TourerV, however the principles applied here can be mostly utilised regardless of the make or model of motor vehicle.
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GReddy eManage Install 27/7/2005
I purchased my Greddy eManage second hand for considerably less than the retail price. The kit consisted of the eManage computer, main harness, both English and Japanese manuals, the PC Support Tool cable and software, and a few connectors and bits and pieces.
In order to program for extra injection and also for ignition timing, usually there is a couple of optional harnesses to accommodate these features. Rather than pay a ridiculous amout of extra money (about $70 for each harness at the time) I decided to make up my own harnesses to enable these extra features.
I also needed a serial port to USB converter as my laptop does not have a serial port and the eManage cable has a serial port connector.
Here are all of the items that I started with for the install of the GReddy eManage piggyback computer tuning system. I discovered that the connectors inside the pligs of the eManage harness were not easily available. Also the cable had the chip number covered with some sort of glue-like substance to conceal the engineering behind the design. Despite these attempts by the manufacturer to deter people like me from modifying the eManage, I decided that I would find a way.
After rummaging through some parts I had lying around from the spare JZX90 that I dismantled, I found some connectors that I believed I could use with the emanage system.
Using a small screwdriver, the connecters were removed from the original plug.
The connectors just required some small modification before they could be implemented. The tabs on the connecters shown in the second photo here were filed down so that the connector could be inserted into the eManage connector plugs.
Each of the modified connectors were inserted into the eManage loom until there were enough to fill the connector plug. This gives the required number of wires to allow splicing into the injector and ignition wires of the factory Toyota ECU. Shown here is the eManage plugs with the extra modified plugs inserted. WE are now ready to solder the wires into the wiring harness that connects to the factory ECU.
Here is a close up of the plugs that have been modified with the addition of some extra wires for the additional injection, and ignition modification. The plugs have the holes necessary for insertion of the additional wires so it was simply a matter of using a screwdriver to slide them into place. Since the connectors were ones that I customised, they were a bit of a tight fit but they eventually all went in.
The wires used were a multicore (4 core) wire usually used for automotive speakers. I simply soldered the additional wires from the plugs to the new multicore wire to provide the additional harness. Once these wires are soldered into place the harness enables the full capabilities of the GReddy eManage system.
The next step is to begin wiring it into the car.
These wires are fed through the centre console in order to enable splicing into the standrad wiring harness.
I decided to mount the eManage unit into the centre console. Since I had replaced the standard double DIN CD/Cassette/Radio unit with a single DIN head unit, I had a spare pocket that I thought would be perfect for the eManage to reside in.
In the second shot you can see the stock engine management computer. This computer is of course retained with the piggy back arrangement required by the eManage unit. Once the wires are fed from under the dash, through the centre console, the eManage main unit is connected as per the manual.
Each of the respective wires are then soldered into the main wiring harness of the standard ECU. This is a little time consuming but it is important to get right as it is easy to damage the stock ECU if a mistake is made. The wiring instructions in the eManage manual were sufficient enough, though there was an addendum inserted to correct a mistake made in one of the JZX90 diagrams.
Most of the wires are sliced into existing wires without breaking them except for the air flow signal (MAP signal) which obviously needs to be intercepted as this is the main method enabling modification of the tune. The ignition wires are also intercepted.
In order to connect the additional injection harness, wires are spliced into the ECU outputs to the injectors. For the timing, the standard wires from the stock ECU to the coils are cut completely and the injection harness is wired "in-line" so that the eManage can modify the ignition timing. The first shot shows the wiring after each loom has been soldered in.
The second shot shows the console after the excess length of wires are fed in behind the console, and the third picture is a closer view of the centre console just before the panels are screwed back into place. I had a bit too much length in the extra wires, however this made splicing in much easier. It just mean't that all that excess length was a tight squeeze in behind the centre console when it came time to put it all back together.
The final shot here shows the GReddy eManage installation completed with everything back in its place. A USB socket in the front of the unit enables connection with a laptop for tuning and logging purposes. Tuning the unit of course is an entirely different matter and requires a great deal of thought, planning, and testing, usually with a dyno or datalogger at hand.
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RECENT MODS CHRONOLOGY
5-Jan-2007
Turbo pages and Headlights
I have recently added a new page about my single turbo conversion. There is a second page yet to come, but page one outlines some of the supporting components needed as well as the turbo itself.
Page 2 will be forthcoming where I detail the fitment of the turbo, manifold and wastegate.
I have also added a page for modifications to my headlights that should be very useful for owners of import vehicles.
25-Jan-2007
Site Revamp
Wow, it has been a very long time since I worked on the site, but now I
am in the process of redesigning it so stay tuned as I add some more content
and attempt to bring this project up to date.
18-Mar-2006
Car Changes
Lots has happened since my last update on upgrades to the car. For instance
the car is now running a 2JZ bottom end and the gearbox has been completely
rebuilt with a stage 1.5 shift kit, beefier clutches and a 2800 rpm stall convertor.
To say that this has transformed the car is an understatement. The car is now
torque heaven, and is an absolute pleasure to drive. The lag that was sadly
felt with the 2.5L motor is now completely gone with the 3L and the stally.
When I can find time to update the site with the process I went through I will
do so. I have many hundreds of pictures to add.
Whatever your vehicle is, whether it is a turbo car or NA or a Toyota or other manufacturer, I hope that the automotive information on this page is of benefit to you as you take the path of modification and upgrade on your car.
Toyota JZX90 MarkII TourerV.