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Home >> Nissan-Datsun >> 2016 >> Versa Note SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (2 Of 3) >> DTC/Circuit Diagnosis >> DTC P0139: Ho2S2 >> Component Inspection >> Diagnostic Test
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Diagnostic Test

  1. INSPECTION START

    Do you have CONSULT?

    Do you have CONSULT?

    YES 

    GO TO STEP 2  .

    NO 

    GO TO STEP 3  .

  2. CHECK HEATED OXYGEN SENSOR 2

    G-20With CONSULT 

    1. Turn ignition switch ON and select "ENGINE" using CONSULT.
    2. Select "DATA MONITOR" mode.
    3. Start engine and warm it up to the normal operating temperature.
    4. Turn ignition switch OFF and wait at least 10 seconds.
    5. Start engine and keep the engine speed between 3, 500 and 4, 000 RPM for at least 1 minute under no load.
    6. Let engine idle for 1 minute.
    7. Select "FUEL INJECTION" in "ACTIVE TEST" mode, and select "HO2S2 (B1)" as the monitor item with CONSULT.
    8. Check "HO2S2 (B1)" at idle speed when adjusting "FUEL INJECTION" to +-25%.
      Fig 1: Fuel Injection Voltage Graph
      G08968446Courtesy of NISSAN NORTH AMERICA, INC.

      SMALL-A : "HO2S2 (B1)" should be above 0.75 V at least once when the "FUEL INJECTION" is +25%. 

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

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    GO TO STEP 6  .

  3. CHECK HEATED OXYGEN SENSOR 2-I

    G-21Without CONSULT 

    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. Check the voltage between ECM harness connector terminals under the following condition.
      ECM Condition Voltage
      Connector + -
      Terminal Terminal
      F11 50
      (HO2S2)      		 59 Revving up to 3, 600 RPM under no load at least 10 times The voltage should be above 0.75 V at least once during this procedure.
      The voltage should be below 0.18 V at least once during this procedure.

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    GO TO STEP 4  .

  4. CHECK HEATED OXYGEN SENSOR 2-II

    Check the voltage between ECM harness connector terminals under the following condition.

    ECM Condition Voltage
    Connector + -
    Terminal Terminal
    F11 50
    (HO2S2)    		 59 Keeping engine at idle for 10 minutes The voltage should be above 0.75 V at least once during this procedure.
    The voltage should be below 0.18 V at least once during this procedure.

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    GO TO STEP 5  .

  5. CHECK HEATED OXYGEN SENSOR 2-III

    Check the voltage between ECM harness connector terminals under the following condition.

    ECM Condition Voltage
    Connector + -
    Terminal Terminal
    F11 50
    (HO2S2)    		 59 Coasting from 80 km/h (50 MPH) in D position (CVT), 4th gear position (M/T) The voltage should be above 0.75 V at least once during this procedure.
    The voltage should be below 0.18 V at least once during this procedure.

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    GO TO STEP 6  .

  6. REPLACE HEATED OXYGEN SENSOR 2

    Replace malfunctioning heated oxygen sensor 2. Refer to EXPLODED VIEW .

    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 [commercial service tool (J-43897-18 or J43897-12)] and approved anti-seize lubricant (commercial service tool).

    INSPECTION END

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