According to our reference material, it did. "Figure out the problem or narrow it down." Is what I'm trying to help you do. It would be nice to know what the computer is thinking and saying about the ect circuit. If, as you say, everything else checks out, having that info would be the next logical step in diagnosing the problem.
I've attached the whole Engine Performance set of schematics.
Images (Click to enlarge)
Monday, August 17th, 2015 AT 3:22 PM