Minimum wire harness for engine operation?

[CTScott]

Originally Posted by CrankyOldMan

Ok, that's pretty much what I was thinking, but it's always good to have someone confirm it. The cable throttle is a must, since the MR2 is cable as well. I'm debating if I want a bigger throttle body to go with the S/C--mostly because of the limited options in OEM upgrades and lack of IAC on an aftermarket universal unit.

From this 2001 Echo listing on ebay it looks like the main wire harness uses three of the ECU connectors, but one of the two other white connectors nearby may be related. I'll spend some time over the next few days putting a ratsnest together in EagleCAD to see what ends up going where.

There are 4 connectors which go to ECM on the Echo.