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Aristo Wiring Loom Turbo Conversion Into MKIV Supra Thread


jonny mac

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hi guys

 

I have a mkiv n/a manual supra

 

I also have an aristo twin turbo vvti 2jz gte engine with loom and ecu

 

 

plans here:

 

cut off the aristo harness ends and extend them through the bulkhead to reach the supra body connectors and run the aristo ecu

 

 

my car is a basic abs model without traction control and without any advanced ecu's

 

this thread will be all the workings I have for the conversion loom including pictures and wiring diagrams, i'll be going through every body plug on both the aristo and both the supra loom, comparing them to wire them up correctly and also hopefully having some guidance along the way from forum members that don't mind chipping in some advice here and there

 

 

 

my car's pinout diagram here, although this is for an auto I'd assume the manual body plugs are the same just without the auto wires:

http://wilbo666.pbworks.com/w/page/41678224/2JZ-GE%20JZA80%20Supra%20Engine%20Wiring

 

and the aristo here:

http://wilbo666.pbworks.com/w/page/42173082/2JZ-GTE%20VVTi%20JZS161%20Aristo%20Engine%20Wiring

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so this is what I've drawn up for the ecu at lunchtime

 

image20171027_130416 by Jonny McIntosh, on Flickr

 

plus b3 is almost fully cut out because of all the auto crap, only 2 wires need kept from there for speed sensors

 

what should I do about throttle pedal sensor inputs to ecu because my car is a stock non traction control model, should I get a pedal and sensor from a vvti turbo facelift supra with a sensor and wire it in? or maybe that's only for cruise control which I don't have anyway

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  • 1 month later...

I've been quite busy and nearly finished my loom, I still have a few queries about a few of the sensors and so on but i'll post up as I get on with it

 

GOING FROM N/A MKIV PREFACELIFT MANUAL SUPRA TO AUTOMATIC ARISTO VVTI TWIN TURBO ENGINE

 

the begining:

 

aristo loom is fully concealed in the aristo engine bay

 

the supra loom starts in the engine bay and finishes inside the cabin

 

the idea:

 

take my original n/a supra manual engine ecu loom and splice into it removing the running gear of the n/a and retain everything else whilst mixing in aristo ecu and engine loom

 

the work done:

 

so this is currently untested and I need to get the measurements but I basically lay out the supra n/a loom on the floor and cut out the following:

all engine sensors/coil/n/a ecu loom basically

 

kept the two body plugs from jza80 chassis leaving me with:

orange body plug

grey body plug

gearbox loom

alternator plug

power steering plug

aircon plug

oil level sensor plug

oil pressure plug

two fuse box plugs (important)

coolant temp sensor for dash

 

take the aristo loom and open it up, the body plugs on the aristo ecu loom need to be opened up and have certain wires removed/some kept

 

these are the ones I kept:

 

image3 - Aristo Body Plug by Jonny McIntosh, on Flickr

 

image2 - Aristo Body Plug by Jonny McIntosh, on Flickr

 

the other plug was cut out and I also removed the diagnostic connector+auto box loom as it was all unnecessary for my build

 

 

I then started at the ecu, I extended every single wire one by one through my bulkhead grommet keeping the stock n/a ecu connector there for length setting to make sure my ecu would still sit in the right location on my car

 

as I went through the ecu I'd kept note of which wires I'd needed to cut into and had them labelled up

 

image1 - Aristo Ecu by Jonny McIntosh, on Flickr

 

then joined them accordingly into the correct pin locations on the jza80 bodyplugs so the jza80 orange and grey plugs would act the same as the original aristo white body connectors input/outputs would have done

 

image5 - jza80 body plug by Jonny McIntosh, on Flickr

 

image4 - jza80 body plug by Jonny McIntosh, on Flickr

 

 

currently I'm still looking into the sp1 wire as it has nowhere to go on my ecu as it only received sp2+ and sp2- from the autobox so the signal's would be different, also I don't know if the last plug requires the key inserted in ignition to activate something inside the ecu,

 

currently I used the trigger wire for the original coil on the n/a to power up the injectors and coil packs for the vvti tt engine

Edited by jonny mac (see edit history)
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  • 2 years later...

Hey Jonny Mac,

 

I'm in the process of doing an Aristo vvti swap into my rhd MK4 and was following along your post here. Was just curious if you had any updates or changes you made to your harness that were different from all of the diagrams you market up?

 

Thank you for sharing these!

 

Chris

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20190713_020924-1612x1209.jpg

 

I did my 2jzgte vvti aristo swap slightly differently.

 

Because they are voltage sensitive, i decided to get an aristo ecu box and mount the ecu in the engine bay and i cut the plugs off the n/a supra loom and extended them into the engine bay as there was maybe 9 or 10 wires needed. I did the same thing with the plugs under the fusebox and the car runs like a dream and the ecu box sits nicely in the bay and looks oem.

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Hey Jonny Mac,

 

I'm in the process of doing an Aristo vvti swap into my rhd MK4 and was following along your post here. Was just curious if you had any updates or changes you made to your harness that were different from all of the diagrams you market up?

 

Thank you for sharing these!

 

Chris

 

not made any changes as I sold the car, however the rpm gauge didn't work for me no matter what I did, tried a gte cluster and also adding resistor but the output from igniter on aristo engine loom isn't the correct signal

 

I'm doing another aristo engine into a mk4 now for my new tt shell project but I'm actually going to just go stand alone ecu masters black edition this time and cut/join the loom into ecu master plugs as it's so much easier

 

the aristo ecu is very limited and has no tuning capabilities and things like fuel cut are really annoying

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  • 2 weeks later...

I have a question about starter signal if anyone is able to help.

 

I currently have STA pin on ECU connector F59 connected to pin #7 on JZA80 body 90980-11469

I'm not sure what to do with

JZA80 body pin #3 on 90980-10897

and

Pins 4 & 5 on Aristo body 90980-11710

 

https://photos.app.goo.gl/wUySveaACbEBpisB9

 

any help is greatly appreciated

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