So i'm almost done with my swap and for the life of me i cant figure out where the sub o2 sensors harness is. does it come off the harness that goes to the trans?
Yup, it is a USDM thing, just like the EGR crap. Maybe it was a sub harness which plugs into the bit of harness that would lead back to the auto transmission. I have that bit still in my harness but folded over and zipped tied at the moment. The wiring diagram on here will get you what wires it is but I don't think it'll tell you which connector it is. Lucky I'm not in a state that inspects for this kind of stuff.
if the 1uzs run a 2nd pair of o2s
the wiring for them usually runs off the last plug on the ecu
the plug that does not goto the engine but goes to the dash
if then runs thru the dash down to the tunnel and i guess out thru a hole in the floor
jdm 1uzs dont run 2nd o2s so depending where u got yr engine will determine
if it runs them or not