3 wire O2 sensor

[Pinelli]

Trying to wire in a 3 wire O2 sensor into a Nissan Navara petrol engine.

One wire goes to 12V, and I assume it's the heater. I also assume it's earthed through the sensor body.

Two wires go to the ecu. 1 is the sensor connection, but what is the other? sensor ground? I can't find any pinout teling me what it's for.

Any other ideas?

[Kiwinoz]

Hi, I was looking at this.
Fuel Injection Page (http://www.racetep.com/fi.html)

Hope this link works, Im new at this.