So, I started figuring out how each wire needs to hook up... and I was going over the ecu connections. I don't think there is a secondary O2 sensor. No wiring for it connector wise and the ecu connector isn't pinned for it. Also, confused about why the pin for ecu ECT comes into the cabin. I thought that would have been straight from the thermostat to the ecu. Why does it appear there are three temperature sensors? Reference:
Part Detail Should have it completely figured out soon