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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Control System (DTC/Circuit Diagnosis) (5.6L) (2 Of 6)) >> DTC/Circuit Diagnosis >> DTC P0159: Ho2S2 >> DTC Confirmation Procedure

DTC Confirmation Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DTC PRIORITY 

    If DTC P0139 or P0159 is detected with DTC P0137, P0138, P0157 or P0158, perform trouble diagnosis for DTC P0137, P0138, P0157 or P0158.

    Is applicable DTC detected?

    YES

    Perform diagnosis of applicable. Refer to DTC Index .

    NO

    GO TO 2.

  2. INSPECTION START 

    Do you have CONSULT?

    Do you have CONSULT?

    YES

    GO TO 3.

    NO

    GO TO 8.

  3. PRECONDITIONING 

    If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Turn ignition switch ON.
    3. Turn ignition switch OFF and wait at least 10 seconds.

    TESTING CONDITION:

    For better results, perform "DTC WORK SUPPORT" at a temperature of 0 to 30 deg.C (32 to 86 deg.F).

    GO TO 4.

  4. PERFORM DTC CONFIRMATION PROCEDURE 

    SYMBOL With CONSULT

    1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT.
    2. Start engine and warm it up to the normal operating temperature.
    3. Turn ignition switch OFF and wait at least 10 seconds.
    4. Turn ignition switch ON.
    5. Turn ignition switch OFF and wait at least 10 seconds.
    6. Start engine and keep the engine speed between 3, 500 and 4, 000 rpm for at least 1 minute under no load.
    7. Let engine idle for 1 minute.
    8. Make sure that "COOLAN TEMP/S" indicates more than 70 deg.C (158 deg.F).
    9. Drive the vehicle in a proper gear at 60 km/h (38MPH) and maintain the speed.
      CAUTION: Always drive vehicle at a safe speed.
    10. Release the accelerator pedal fully at least 5 seconds.
      CAUTION:
      • Enable the engine brake.
      • Always drive carefully.
      • Never apply brake when releasing the accelerator pedal.
    11. Repeat step 9 and 10 at least 8 times.
    12. Check the following item of "DATA MONITOR".

      DTC

      Data monitor item

      Status

      P0139

      HO2 S2 DIAG1 (B1)

      CMPLT

      HO2 S2 DIAG2 (B1)

      P0159

      HO2 S2 DIAG1 (B2)

      HO2 S2 DIAG2 (B2)

    Is "CMPLT" displayed on CONSULT screen?

    YES

    GO TO 7.

    NO

    Perform DTC confirmation procedure again.

    NO

    GO TO 5.

  5. PERFORM DTC WORK SUPPORT 
    1. Open engine hood.
    2. Select "HO2S2 (B1) P0139" or "HO2S2 (B2) P0159" of "HO2S2" in "DTC WORK SUPPORT" mode with CONSULT.
    3. Start engine and follow the instruction of CONSULT display.
      NOTE: It will take at most 10 minutes until "COMPLETED" is displayed.

    Is "COMPLETED" displayed on CONSULT screen?

    YES

    GO TO 7.

    NO

    GO TO 6.

  6. PERFORM DTC CONFIRMATION PROCEDURE AGAIN 
    1. Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).
    2. Perform DTC confirmation procedure again.

    GO TO 4.

  7. PERFORM SELF-DIAGNOSIS 

    SYMBOL With CONSULT

    Perform ECM self-diagnosis.

    Is DTC "P0139" or "P0159" detected?

    YES

    Proceed to DTC Diagnosis Procedure .

    NO

    To check malfunction symptom before repair: Refer to Intermittent Incident .

    NO

    Confirmation after repair: INSPECTION END

  8. PERFORM COMPONENT FUNCTION CHECK-I 
    NOTE: Use component function check to check the overall function of the heated oxygen sensor 2 circuit. During this check, a 1st trip DTC might not be confirmed.

    SYMBOL WITH GST

    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. Restart 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.

      DTC

      ECM

      Condition

      Voltage

      +

      -

      Connector

      Terminal

      Connector

      Terminal

      P0139

      F79

      84

      F78

      43

      Revving up to 4, 000 rpm under no load at least 10 times

      A change of voltage should be more than 0.29 V for 1 second during this procedure.

      P0159

      77

    Is the inspection result normal?

    YES

    To check malfunction symptom before repair: Refer to Intermittent Incident .

    YES

    Confirmation after repair: INSPECTION END

    NO

    GO TO 9.

  9. PERFORM COMPONENT FUNCTION CHECK-II 

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

    DTC

    ECM

    Condition

    Voltage

    +

    -

    Connector

    Terminal

    Connector

    Terminal

    P0139

    F79

    84

    F78

    43

    Keeping engine at idle for 10 minutes

    A change of voltage should be more than 0.29 V for 1 second during this procedure.

    P0159

    77

    Is the inspection result normal?

    YES

    To check malfunction symptom before repair: Refer to Intermittent Incident .

    YES

    Confirmation after repair: INSPECTION END

    NO

    GO TO 10.

  10. PERFORM COMPONENT FUNCTION CHECK-III 

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

    DTC

    ECM

    Condition

    Voltage

    +

    -

    Connector

    Terminal

    Connector

    Terminal

    P0139

    F79

    84

    F78

    43

    Coasting from 80 km/h (50 MPH) with selector lever in the D position

    A change of voltage should be more than 0.29 V for 1 second during this procedure.

    P0159

    77

    Is the inspection result normal?

    YES

    To check malfunction symptom before repair: Refer to Intermittent Incident .

    YES

    Confirmation after repair: INSPECTION END

    NO

    Proceed to DTC Diagnosis Procedure .

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