I know the plugs are the same between the two ECUs, im just curious if there are any issues using a 1JZ manual ecu with the auto wiring harness that came with my engine. Car is a manual car running the auto harness, no issues with it running-wise, just looking for a spare ECU to carry around in case im stuck somewhere.

 

ive heard different stories man. i dont know the answer either. hopefully this friday ill be able to buy an auto off of another member here and ill be able to let you know. my setup is a 5spd 1jz as well and im tryin to do the samething your doing lol

 

Not at all, I am running the same auto ECU on a 1jz w/ R154.

Just wire up the Park/Neutral Switch to your clutch pedal and you are set.

 

So we really dont need the shift indicator plug correct? Im wiring a 1jz w/w58 auto ecu for my friend

 

The car is 6hours away so i really cant check myself.

 

i already have my wiring setup for my auto ECU so my park/neutral switch. I just need a spare ECU while i figure out what's wrong with the A/C on my current ECU (A/C compressor isn't getting grounded at the ECU so no A/C)

as for the shift indicator plug, no that does not need to be wired. Just as long as the ECU sees that the car is in neutral either through a switch or a direct wire to the NSW pin on the ECU and you're set (need to dig up my 1JZ wiring diagrams to confirm)

 

how did the car run? Just curious cause I’m about to do it too! Please message back

 

Hello and welcome to CL! This thread is from 2012 and I haven't seen StiCk3 active here for several years now. However there should be several active forum members with 1JZ-GTE Auto to Manual swaps of their own who may be able to comment.

Is your 1JZ swap getting set up to run the automatic ECU or a manual ECU? And do you have a 1JZ-GTE Non-VVT-i or VVT-i engine?

 

It’s going to run a automatic ECU and it’s vvti

 

I’m not working from experience with VVT-i swaps but you may want to consider the last post in this thread regarding manual swaps on 98-00 SC300’s and 98-00 SC400’s:

https://www.clublexus.com/forums/per...t-issue-6.html

A particular device is mentioned which helps with ECUs expecting various signals for automatic transmissions.

That being said I think some more research will be needed on your part to see what other people did with their 1JZGTE VVT-i Auto to manual conversions while still using their VVT-i Auto ECUs.