Heated Oxygen Sensor 1

With CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Select "MANU TRIG" and adjust "TRIGGER POINT" to 100% in "DATA MONITOR" mode with CONSULT-II.
3. Select "HO2S1 (B1)" and "HO2S1 MNTR (B1)".
   Fig 1: HO2S1 (B1) And HO2S1 MNTR (B1) - CONSULT-II Screen Display

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Hold engine speed at 2, 000 rpm under no load during the following steps.
5. Touch "RECORD" on CONSULT-II screen.
6. Check the following.
   • "HO2S1 MNTR (B1)" in "DATA MONITOR" mode changes from "RICH" to "LEAN" to "RICH" more than 5 times in 10 seconds. 5 times (cycles) are counted as shown in Fig 2.
   • "HO2S1 (B1)" voltage goes above 0.6V at least once.
   • "HO2S1 (B1)" voltage goes below 0.3V at least once.
   • "HO2S1 (B1)" voltage never exceeds 1.0V.
   Fig 2: HO2S1 MNTR (B1) In DATA MONITOR Mode - CONSULT-II Screen Display

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 3: HO2S1 (B1) Voltage Pattern

   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.

Without CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 35 [HO2S1 (B1) signal] and ground.
3. 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 --> 0 - 0.3V 

   Fig 4: Checking Voltage At ECM Connector Terminal 35 - Engine Speed Held At 2, 000 RPM Constant, Under No Load

   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.