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Home >> Nissan-Datsun >> 2019 >> Altima Edition ONE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Control System (DTC/Circuit Diagnosis) (Pr25DD) (2 Of 4)) >> DTC/Circuit Diagnosis >> DTC P0448: EVAP Canister Vent Control Valve >> DTC Description >> PR25DD engine >> DTC Confirmation Procedure

DTC Confirmation Procedure

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

    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE 

    SYMBOL With CONSULT

    1. Turn ignition switch ON and wait at least 5 seconds.
    2. Turn ignition switch OFF and wait at least 10 seconds.
    3. Turn ignition switch ON and select "DATA MONITOR" mode of "ENGINE" using CONSULT.
    4. Start engine and let it idle for at least 1 minute.
    5. Repeat next procedures three times.
      1. Increase the engine speed up to 3, 000 to 3, 500 rpm and keep it for 2 minutes and 50 seconds to 3 minutes.

        Never exceed 3 minutes.

      2. Fully released accelerator pedal and keep engine idle for about 5 seconds.
    6. Repeat next procedure 20 times.
      • Quickly increase the engine speed up to 4, 000 to 4, 500 rpm or more and keep it for 25 to 30 seconds.
      • Fully released accelerator pedal and keep engine idle for at least 35 seconds.
        G04074140Courtesy of NISSAN NORTH AMERICA, INC.
    7. Check 1st trip DTC.

    SYMBOL With GST

    Follow the procedure "With CONSULT" above.

    Is 1st trip DTC detected?

    YES

    Proceed to DTC Diagnosis Procedure 

    NO

    INSPECTION END

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