Hello, I've been looking through the diagrams as well, and you're right it's confusing. Are you sure the wire isn't black/white? Because I found this generic electronic module, it's another type of PCM. Like a slave module I think. It has black/white going to it(power) and coming out black/white ground. Update: So this ECM has 3 different connectors, here's all 3. C175T is the one you need. Pin 48 and 48 are your oxygen sensor heater circuits.
Images (Click to enlarge)
Saturday, August 1st, 2020 AT 2:34 PM