Heated Oxygen Sensor 2

With CONSULT-II 

1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-II.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and 4,000 RPM for at least 1 minute under no load.
5. Let engine idle for 1 minute.
   Fig 1: Displaying Data Monitor Screen

   Courtesy of NISSAN MOTOR CO., U.S.A.
6. Select "FUEL INJECTION" in "ACTIVE TEST" mode, and select "HO2S2 (B1)/(B2)" as the monitor item with CONSULT-II.
   Fig 2: Displaying Active Test

   Courtesy of NISSAN MOTOR CO., U.S.A.
7. Check "HO2S2 (B1)/(B2)" at idle speed when adjusting "FUEL INJECTION" to +25%.
   Fig 3: Identifying Fuel Injection Graph

   Courtesy of NISSAN MOTOR CO., U.S.A.

   "HO2S2 (B1)/(B2)" should be above 0.70V at least once when the "FUEL INJECTION" is +25%. 

   "HO2S2 (B1)/(B2)" should be below 0.18V at least once when the "FUEL INJECTION" is -25%. 

Without CONSULT-II 

1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 RPM for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Set voltmeter probes between ECM terminal 74 [HO2S2 (B1) signal] or 55 [HO2S2 (B2) signal] and body ground.
6. 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.)

   The voltage should be above 0.70V at least once during this procedure. 

   If the voltage is above 0.70V at step 6, step 7 is not necessary. 

7. Keep vehicle at idling for 10 minutes, then check voltage.

   Or check the voltage when coasting from 80 km/h (50 MPH) in D position with "OD" OFF.

   The voltage should be below 0.18V at least once during this procedure. 

8. If NG, replace heated oxygen sensor 2.
   Fig 4: Identifying ECM Connector

   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.