I searched, but did not find what I was looking for...I have a '92 Civic HB CX with a B16A SiRII Swap the o2 sensor has already been converted from a 3 wire to a 4 wire, but how do I wire it to the ecu? TIA

 

Ecu connector A 32 point plug secondary o2 sensor Heater
when looking at the end that goes into the ecu (not the end with wires sticking out) it will be 5 over from left on the row that has 4 slots, 1 space, 3 slots, 1 space, 4 slots

secondary o2 sensor ground and secondary o2 sensor signal

ECU connector d 16 point

again looking at end that goes into the ecu, row with 1 slot, 1 space, 3 slots
the middle one of the 3 slots is for the signal
then the one on the end to the right of the 3 slots is for ground


i have no clue where the fourth wire on the sensor goes, it just does