Engine 01-02 ECU Differences, HELP PLEASE!

01-02 ECU Differences, HELP PLEASE!

i have everythign prepared for a 5spd transmission. my friend's entire wrecked car (everything intact though) and my car are going into the shop, and my car will receive his 5spd transmission. i don't want to hear about why i am doing the 5spd swap, i am aware that my circumstances favor the swap economically.

my question is are the ECU's between the M/T and A/T exactly the same in the sense that they are the same SIZE, and have the same connections? the ECU is the unit that's found underneath the air conditioning console and is labeled either A/T or M/T, then 1ZZ-FE right? i appreciate any help. also, are there any special considerations for the swap? like if i need extra wiring or harnesses and such. my main concern is if the ECU's can simply be switched out with the transmissions, and will hook up similarly and get the car functioning. thanks.

so all that's needed is to swap the tranny, the ECU is not necessary (manual trans to auto ECU 01-02), and the 5spd tranny would still work. if i understand you correctly, the ECU is not needed to make the 5spd transmission work, and using an automatic celica GT ecu will fit exactly as my stock automatic ECU and i can reap the benefits from it? i appreciate the input james.

that didn't make since. auto and manual ecus arent the same, so to switch transmissions you don't need to swap ecu's????

Who has done this? As far as I have seen the pinouts on the ECU's dont match.

Are there 3 plugs or 4 on a Celica Auto ECU? I have to look up the pinouts, there are the same amount of them, but I believe they are in different places on the plug.

Rolla M/T and 3spd A/T- 3 plugs

Celi M/T, Rolla 4 spd- 4 plugs.

Celi A/T, ?????

didn't vamp do the auto celica swap and everything worked...except reverse?

i'll have the entire car (from which i am taking all 5spd components) in with my car at the shop. everything under the hood is there and good, except the body is severely fucked, that's why it's being parted afterwards. if something does go wrong, (i hope not) then having the entire car must help right?

That wasnt the only thing, he couldnt get into 4th- the 4sp OD is electronically controlled- Other than that nothing else fits. All Celi ECU's are 4 plug. Dug up my printouts last night. Rolla 3sp AT and 5sp MT are 3 plug. So again Ive never seen anyone use a Celi ECU drop in.

James said he didnt need to swap ECUs, and to put in a Celi AT ECU.

You do need the ECU for the new application, Its easier if you get the engine wiring harness for that app., or youre splicing wires. And the Celi ECU will not work in any case...

just swap the damn ECUs and don't ghetto-rig your auto ECU to work with the manual transmission. You're already taking out the entire transmission, a chip and a couple of wires shouldn't be that hard to replace.

Thats helps a lot to have the whole car

when the actual M/T is put in, are the mounts different? the shop said that welding it in place may be necessary (and difficult), any input on this? appreciate it.

what? that doesn't sound right to me. I would think that the mounts are there for both (this is an economy car after all) but I don't know for sure.

No, the mounts are different and the half-shafts are different size too. But since you have the old car youre good, right? the mounts on the bottom that attach to the lower crossmember running from front to back are probably different. The auto is a bit bigger and heavier than the man.

thanks for clearing that up. sounds like he just needs to transpant the mounts from the old car instead of welding stuff (that just sounded wrong to me).

oh alright, thanks. so basically the steps would be to take out the M/T, (in terms of just transplanting the entire unit) with the mounts which can be removed, take out my A/T and its mounts, and then put the M/T in with the mounts that were in the same place in my car as my A/T was?

one more thing, the shop said the thing they fear most is running into harness incompatibility, where if it does become a problem, they basically have to strip the car down to resolve it. should this be a problem or is it pretty much plug n go, considering that the 5spd should work w/ the M/T? thanks

Just wondering, would it be possibe to swap the celica a/t ecu into an 01 corolla (a/t) for more power?

i really hope it doesn't come down to transplanting the 5spd ECU and harness, cause the harness is gonna be such a bitch. it's like switching positions between my balls and my eyes, argh. well i've narrowed it down to...

1. 5spd tranny will work w/ auto ECU after minor bugs are worked out (i want this)
2. 5spd ECU will fight right in despite plug differences (also a desirable outcome) and therefore 5spd tranny will work
3. transplant wiring harness and ECU altogether (the one where i switch you know what)

thanks, a lot. also to everyone for providing input.

Okay thanks vortex

all i have to say now is we'll see. wish me luck.

ooh haha it's okay, i called you when i looked at the ECU's and me and my friend were laughing (not the humorous type laugh). i verified for myself that James was right, it is indeed 3vs4 plug (MTvsAT respectively). i also hope that the 5spd working w/ the auto ECU w/ minor modifications to wiring is right.