Minimum wire harness for engine operation?

[CrankyOldMan]

Yeah, the engineering world is surprisingly cutthroat when it comes to knockoffs.

I spent a bit more time today going over the wire harness. Took off all the A/T stuff that isn't needed, made a few pin swaps to get some M/T wiring in the right spot, and started cleaning up my wiring schematic. Looks like the harness I bought is missing the TPS--bastards just chopped it right off instead of removing it. There are still about 10 wires on the E4 connector, since I don't know for sure what signals the ECU requires to operate. I'm going to put together a spreadsheet with the pinouts of each ECU connector to help with collaboration.

I also scored a '14 Yaris A/T ECU and engine wire harness today as well, with the intention of making a piggyback wire harness adapter from it.

[fnkngrv]

Originally Posted by CrankyOldMan

Looks like the harness I bought is missing the TPS--bastards just chopped it right off instead of removing it.

Same pinout as our current gen TPS?

Also what are you going to do about the throttle body and IM?




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[CrankyOldMan]

Originally Posted by fnkngrv

Same pinout as our current gen TPS?

Also what are you going to do about the throttle body and IM?

No, it's the previous gen with separate TPS and IAC valve.

I'm not 100% sure what the plan is for IM. Somewhere between all OEM bits, a 1ZZ (cable) TB, and the Blitz S/C. I had also debated using the Yaris manifold and adapting a universal TB, but that means no IAC--which may be a pain in the ass.