3rd Gen 3sgte and MR2 Wiring Harness

discoinferno218

New member
Alright guys, quick question for you. I am in the process of putting a 3rd gen 3sgte into my 89 Corolla Wagon. The harness I have is cut in a couple places. One cut is right by the ignition coil and the other cut is going to where the fuse box would be, I believe. I was wondering if a wiring harness from the MR2 with the same engine would work for my application. Is everything on the engine and tranny the same? Is the ECU pin layout the same? I have my ST205 ECU so I was just gonna use that. Since I can't find an English translated ST205 wiring diagram I was thinking I could still piece it together by separating the engine and rest of the electrical and merging the two but as it is incomplete that would make it even more challenging.
 

msanders2

New member
Yes it will work. You will have a check engine light for the WTA intercooler though. There is a thread on here how to get rid of it though.

I have a complete 3rd gen MR2 3sgte harness for sale if you need one. $200
 
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