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DTC Confirmation Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  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 1 
    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 2 minutes.
    7. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES

    Proceed to Diagnosis Procedure .

    NO

    With CONSULT: GO TO 3.

    NO

    Without CONSULT: GO TO 5.

  3. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION 2 
    NOTE: For better results, perform "DTC WORK SUPPORT" at a temperature of 0 to 30°C (32 to 86°F).
    1. 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. Check 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 70°C (158°F).

    9. Open engine hood.
    10. Select "HO2S2 (B1) P1146" (for DTC P0138) or "HO2S2 (B2) P1166" (for DTC P0158) of "HO2S2" in "DTC WORK SUPPORT" mode with CONSULT.
    11. Follow the instruction of CONSULT display.
      NOTE: It will take at most 10 minutes until "COMPLETED" is displayed.
    12. Touch "SELF-DIAG RESULTS".

    Which is displayed on CONSULT screen?

    OK-1

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

    OK-2

    Confirmation after repair: INSPECTION END

    NG

    Proceed to Diagnosis Procedure .

    CON NOT BE DIAGNOSED

    GO TO 4.

  4. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION 2 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-1 

    SYMBOL Without 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. 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.

      DTC

      ECM

      Condition

      Voltage

      Connector

      +

      -

      Terminal

      P0138

      F13

      41

      35

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

      The voltage should be below 0.27 V at least once during this procedure.

      P0158

      32

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    GO TO 6.

  6. PERFORM COMPONENT FUNCTION CHECK-2 

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

    DTC

    ECM

    Condition

    Voltage

    Connector

    +

    -

    Terminal

    P0138

    F13

    41

    35

    Keeping engine speed at idle for 10 minutes

    The voltage should be below 0.27 V at least once during this procedure.

    P0158

    32

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    GO TO 7.

  7. PERFORM COMPONENT FUNCTION CHECK-3 

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

    DTC

    ECM

    Condition

    Voltage

    Connector

    +

    -

    Terminal

    P0138

    F13

    41

    35

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

    The voltage should be below 0.27 V at least once during this procedure.

    P0158

    32

    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 Diagnosis Procedure .

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