JDM VR-4 O2 sensor wiring

[fuel]

hey guys, just bought a replacement O2 sensor for the VR-4 - it's an aftermarket two wire one I need to wire in as it has no plug. Anyway the wires on the O2 sensor are grey and black with grey being the sensor earth and black being the ECU signal output. Now the wiring on the car for original O2 sensor has two blue and white wires - question is which wires go to which? I understand the US VR-4s have four wire sensors but I gather two wires are a heater and the blue and white wires still will be the same as a two wire setup?

Thanks!

 

[misterfixit]

search my posts, the scans of the jdm injection circuits are up. posted under a cyone thread.

rich