ECU SWAP from 3S-FE to 1G-FE?

SENGA

MEMBER
2000 TOYOTA RAV4
2.0L
4 CYL
4WD
AUTOMATIC
250,000 MILES

I need a wiring diagram to swap ECU 3S-FE into 1G-FE. Please help with all the information you have on that topic.

Wednesday, September 28th, 2022 AT 1:55 AM

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,198 POSTS

Yep, here are the engine and PCM wiring diagrams you have requested in the images below. Also, I have included a guide on how to check the wiring connections.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the images (below). Please let us know if you need anything else to get the problem fixed.

Images (Click to make bigger)

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Wednesday, September 28th, 2022 AT 5:40 PM

SENGA

MEMBER
26 POSTS

The images can't help. I need to Perform a standalone swap from 3S-FE ECU in ECU into 1G-FE A/T. Meaning that I have 3S-FE Noah engine and I want to connect it to 1G-FE A/T ECU. I need how to perform a swap.

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Thursday, September 29th, 2022 AT 12:30 AM

KEN L

MASTER CERTIFIED MECHANIC
48,198 POSTS

Which car did this combination come in? I can look it up that way.

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Thursday, September 29th, 2022 AT 1:33 PM

SENGA

MEMBER
26 POSTS

The problem is that I have an engine of 3s-fe ECU but the transmission is 1g-fe a/t. Ecu. I have 2 ECU. One for engine 3s-fe and on for transmission 1g-fe a/t. I need only transmission wiring diagram for 1g-fe a/t ECU.

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Wednesday, October 5th, 2022 AT 6:45 AM

KEN L