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Home >> Nissan-Datsun >> 2008 >> Altima Hybrid >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (Hybrid) >> Component Diagnosis >> P0138 Ho2S2 >> DTC Logic >> DTC Confirmation Procedure
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

DTC Confirmation Procedure

  1. PRECONDITIONING

    If DTC Confirmation Procedure has been previously conducted, always perform the following 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.

      GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A
    1. Activate "INSPECTION MODE 1 " to start engine, and warm up engine to 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. Turn ignition switch ON (READY).
    6. Drive vehicle at a speed of 80 km/h (50 MPH) or more for at least 3 consecutive minutes.
      CAUTION: Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.
      NOTE: Keep the vehicle speed as steady as possible during the cruising.
    7. Check 1st trip DTC.

    Is 1st trip DTC detected? 

    YES : Go to "DIAGNOSIS PROCEDURE ".

    NO-1 : With CONSULT-III: GO TO 3.

    NO-2 : Without CONSULT-III: GO TO  5.

  3. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B
    NOTE: For better results, perform "DTC WORK SUPPORT" at a temperature of 0 to 30°C (32 to 86°F).
    1. Activate "INSPECTION MODE 1 " to start engine, and warm up engine to 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. Turn ignition switch ON (READY) and select "DATA MONITOR" mode with CONSULT-III.
    6. Drive vehicle at a speed of 80 km/h (50 MPH) or more for at least 3 consecutive minutes.
      CAUTION: Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.
      NOTE: Keep the vehicle speed as steady as possible during the cruising.
    7. Stop the vehicle and shift the selector lever to P position.
    8. Fully depress the accelerator pedal and keep it until step  11.
    9. Make sure that "COOLANT TEMP/S" indicates more than 70°C (158°F).

      If not, warm up engine and go to next step when "COOLANT TEMP/S" indication reaches to 70°C (158°F).

    10. Select "HO2S2 (B1) P1146" of "HO2S2" in "DTC WORK SUPPORT" mode with CONSULT-II.
    11. Touch "START".
      NOTE: It will take at most 10 minutes until "COMPLETED" is displayed.
    12. Touch "SELF-DIAG RESULT".

    Which is displayed on CONSULT-III 

    OK : INSPECTION END

    NG : Go to "DIAGNOSIS PROCEDURE ".

    CAN NOT BE DIAGNOSED : GO TO 4.

  4. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B 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  3.

  5. PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B

    Perform component function check. Refer to "DIAGNOSIS PROCEDURE ".

    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.

    Is the inspection result normal? 

    YES : INSPECTION END

    NO : Go to "DIAGNOSIS PROCEDURE ".

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