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Home >> Nissan-Datsun >> 2009 >> Maxima S >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0137 To P0448 >> P0139, P0159 Ho2S2 >> Component Function Check
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Component Function Check

  1. PERFORM COMPONENT FUNCTION CHECK-I

    Without CONSULT-III 

    1. Start engine and warm it up to the normal operating temperature.
    2. Turn ignition switch OFF and wait at least 10 seconds.
    3. Turn ignition switch ON.
    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. Check the voltage between ECM harness connector terminals under the following conditions.
      Fig 1: Checking Voltage Between ECM Harness Connector Terminals
      G05869797Courtesy of NISSAN MOTOR CO., U.S.A.
      TERMINAL CONNECTOR REFERENCE CHART

      DTC ECM Condition Voltage
      Connector + -
      Terminal Terminal
      P0139 F13 33 [HO2S2 (bank 1) signal] 35 (Sensor ground) Revving up to 4, 000 RPM under no load at least 10 times A change of voltage should be more than 0.24 V for 1 second during this procedure.
      P0159 34 [HO2S2 (bank 2) signal]

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: GO TO 2.

  2. PERFORM COMPONENT FUNCTION CHECK-II

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

    Fig 2: Checking Voltage Between ECM Harness Connector Terminals
    G05869798Courtesy of NISSAN MOTOR CO., U.S.A.
    TERMINAL CONNECTOR REFERENCE CHART

    DTC ECM Condition Voltage
    Connector + -
    Terminal Terminal
    P0139 F13 33 [HO2S2 (bank 1) signal] 35 (Sensor ground) Keeping engine at idle for 10 minutes A change of voltage should be more than 0.24 V for 1 second during this procedure.
    P0159 34 [HO2S2 (bank 2) signal]

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: GO TO 3.

  3. PERFORM COMPONENT FUNCTION CHECK-III

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

    Fig 3: Checking Voltage Between ECM Harness Connector Terminals
    G05869799Courtesy of NISSAN MOTOR CO., U.S.A.
    TERMINAL CONNECTOR REFERENCE CHART

    DTC ECM Condition Voltage
    Connector + -
    Terminal Terminal
    P0139 F13 33 [HO2S2 (bank 1) signal] 35 (Sensor ground) Coasting from 80 km/h (50 MPH) in D position A change of voltage should be more than 0.24 V for 1 second during this procedure.
    P0159 34 [HO2S2 (bank 2) signal]

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Go to "DIAGNOSIS PROCEDURE ".

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