Hi,

been looking through the wiring diagrams and cant find the wires for the oxygen sensor.
Friends Soarer has been idling bad and going through quite a bit of fuel, so thought i'd check if the oxygen sensor is giving a voltage output.

http://www.supra.co.nz/1g/1ggte_gen_3_2_0001.jpg

From this I see the letters which I believe are wire colours
and they are wire number 1 is W for White?, Wire number 3 is G-Y for Grey/Yellow or Green/Yellow?
and Wire 2 B-R for Black red?

But on his oxygen sensor, there is 2 black wires and a Blue wire which seems to be different from what the wiring diagram. Which wire is the one for the voltage output?

Thanks.