With GST

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Start engine and warm it up to the normal operating temperature.
Turn ignition switch OFF and wait at least 10 seconds.
Start engine and keep the engine speed between 3,500 and 4,000 RPM for at least 1 minute under no load.
Let engine idle for 1 minute.
Set voltmeter probes between ECM terminal 74 [HO2S2 (B1) signal] or 55 [HO2S2 (B2) signal] and body ground.
Check the voltage when revving up to 4,000 RPM under no load at least 10 times. (Depress and release accelerator pedal as soon as possible.)

Fig 1: Checking Voltage When Revving Up To 4,000 RPM
Courtesy of NISSAN MOTOR CO., U.S.A.

A change of voltage should be more than 0.06V for 1 second during this procedure.

If the voltage can be confirmed in step 6, step 7 is not necessary.
Keep vehicle at idling for 10 minutes, then check the voltage. Or check the voltage when coasting from 80 km/h (50 MPH) in D position with "OD" OFF.
A change of voltage should be more than 0.06V for 1 second during this procedure.
If NG, go to DIAGNOSTIC PROCEDURE .