Without CONSULT-II

Start engine and warm it up to normal operating temperature.
Set voltmeter probes between ECM terminal 35 [HO2S1 (B1) signal] and engine ground.
Check the following with engine speed held at 2, 000 RPM constant under no load.

The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V more than 5 times within 10 seconds.
The maximum voltage is over 0.6V at least 1 time.
The minimum voltage is below 0.3V at least 1 time.
The voltage never exceeds 1.0V.
1 time: 0 - 0.3V --> 0.6 - 1.0V --> 0 - 0.3V

2 times: 0 - 0.3V --> 0.6 - 1.0V --> 0 - 0.3V --> 0.6 - 1.0V

Fig 1: Setting Voltmeter Probes Between ECM Terminal 35 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

CAUTION:

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.