3.4 with auto. While the PO had the 4runner the converter was stolen and wires cut. I've had a cel since I've had it and think there they might have rewired a generic 02 sensor wrong. I have searched and looked for several days for a wiring diagram on this. This is how they are wired.

Harness - 02 sensor

pink/blue - white
white/blue - white
brown - gray
white - black

Thanks in advance for any help.

 

My O2 sensor on my 95 Tacoma has Black, Black, Blue, White. The harness wires are connected as such:

Harness O2 sensor

pink/green black
white/blue black
brown white
white blue

Don't know if this helps. Not sure if two black wire correspond to your two white wires, white = gray and blue = black. If so then that would be the same. Otherwise ??? Sorry can't be of more help.

 

Anyone else have any input.