aristo 2jz front clip, can i use auto ecu on r 154?

[scottiedawg66]

Whats up folks. I was curious if anyone has had sucess running an auto aristo ecu with a r154 for their 2jz swap? I wanna go 2j, but if i have to get a jdm MT harness, and ecu thats gonna be a bitch. Any sugguestions besides stand alone or 1.5 jz?

~scott

 

[NecroCyde]

i think you can use the A/T ecu and harness, the neutral sensor just needs to be tricked or wired into the clutch depress saftey switch. yah you can run the r154, you just need tht JZ bellhousing. people have used originally auto engines with 5 speeds in the past just fine.

 

[scottiedawg66]

yea, i figured the neutral safety switch would be the only real issue. And 1jz bell housing is just gonna be a $350 needle in the hay stack search. Any other opinions?

~scott

 

[NecroCyde]

stay with the jdm 2jz a340e, there actually pretty stout, just as good as the north american autos, could be easier, but if the chassis is already 5 speed, then just get a 1jz r154, it will safe you the hassle of getting a bellhousing for your older 7m r154 plus it will be newer and have less chance of getting worn out.

 

[scottiedawg66]

no way am i rocking an auto! Im not building a drag car over here.

~scott

 

[drunk_medic]

R154 it, then.

My plan was to R154 an auto Aristo 2JZ and throw it in my MkIII. I bought more than was necessary, just in case. I got a 6-speed ECU. It was only $300, which is a drop in the bucket when you are going 2JZ.

I don't have any results for you - my project is on hold for awhile. It will happen someday, but soon? I think not..

 

[scottiedawg66]

but if you use the MT ecu doesnt the AT wiring pins get all fawked up??? Thats my only reservation, i would rather use a MT ecu?

~scott

 

[NecroCyde]

again, if the auto - 5 speed swaps with the 7m is any concession, a A/T ecu, should work fine, the only thing i might be concerned about is timing pull, but a little bit of research will let you know if aristo ecu's did that, because from as far as i know, north american supra 2jz ecus didnt.

 

[daledoe]

I wont to go 2JZ some day

 

[scottiedawg66]

But isnt that timing pull solved by removing a fuse??? I hear of mkIV guys pulling their TRS fuse or something like that to get rid of the timing pull before the auto switches gears? Does the aristo ECU have the same configuration where just pulling the fuse will solve this problem?

~scott

 

[NecroCyde]

your thinking the trac fuse, that just stops the trac system from inhibiting changes it traction, its actually not that great, especially at high speeds. pulling it is one of the first mods turbo auto mark 4 owners do, it doesnt really change transmission at all, because the mark 4 a340 doesnt pull timing or retard the engine on shifts.

 

[scottiedawg66]

good point, i found similar results by seraching supraforums. However i just spoke with mike (1jzpower) at blacktrax (real nice engine swap shop in Ca), and he said that the auto ecu will stay in limp mode when used with a MT, so i guess this idea is kinda out of the question.

~scott

 

[drunk_medic]

but if you use the MT ecu doesnt the AT wiring pins get all fawked up??? Thats my only reservation, i would rather use a MT ecu?

~scott

Some 2JZs have the regular 80-pin connector which is a block of 2 40 pin ones, and then it has another lone 40-pin connector. Some Japanese 2JZs have one 80-pin connector and another funky connector in place of the lone 40 pin. As long as you are using the same connector/ECU combination, I can't see a problem. The pins are the same on auto and MT ECUs - it just depends on whether they are used or not. I have an auto harness and I just deleted all of the wires that pertain solely to auto. If you look on a wiring diagram/ECU pinout, you can tell what is going on pretty easily. I went with getting the MT ECU because the last thing I want is something crazy like an auto ECU pulling timing or adjusting the fuel map just because it doesn't sense the auto shifting. If I'm pulling down enough money in the future when I am ready for the swap, I might just buy a full US Spec MT ECU's harness from Toyota for the swap, and then I can test my current harness and possibly use it in another car if it works well.

 

[scottiedawg66]

it sounds like you have the best solution to this problem, i just wish ur car was running to back your points! (not trying to be a dick, but it would be sweet to see it actually work) props to drunk medic for being origional.

~scott

 

[NecroCyde]

ive remember reading recently that the aristo harness is totally different then the supra 2jz harness, so i believe changing out the harness might be out of the question, look in the mark 4 section on SF, i believe they were comparing part numbers of the aristo 2jz and supra 2jz harnesses, though similar, there actually quite different and there were comments that they would work when swapped in place of each other. dont take this as gospel, as it is just what i read on SF and should be considered accordingly, however, i do know for certain the harnesses have distinct part numbers.

 

[drunk_medic]

The way I see it is like this: A 2JZ has X sensors. It needs THOSE sensors to run. The harness hooks up to these sensors, electronics, etc. The other end of the harness goes to the ECU. Now, whether you have one end hooked to the sensors and the other to an Aristo or Supra ECU shouldn't matter. A harness should have connectors for all of the same electronics, sensors, etc, as the 2JZ is run a certain way. I severely doubt that a 1995 2JZ from a Supra and an Aristo have different sensors, no matter how different the additional ECU plug may be. If you have a Supra harness and Supra ECU, but an Aristo engine, why would there be a problem [unless you got a VVTi engine] aside from a few minor things [AFM instead of MAP, different impedance injectors]?

 

[Allan_MA70]

just ditch the wiring and go aftermarket much neater and more power/econ