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Home >> Nissan-Datsun >> 2014 >> Maxima S >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0196 To P0607 >> DTC P0448: EVAP Canister Vent Control Valve >> DTC Logic >> DTC Confirmation Procedure

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 

    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 with CONSULT.
    4. Start engine and let it idle for at least 1 minute.
    5. Repeat next procedures three times.
      • Increase the engine speed up to between 3, 000 and 3, 500 rpm and maintain that speed it for 2 minutes and 50 seconds to 3 minutes.

        Never exceed 3 minutes. 

      • 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 between 4, 000 and 4, 500 rpm and maintain that speed it for 25 to 30 seconds.
      • Fully released accelerator pedal and keep engine idle for at least 35 seconds.
        Fig 1: Engine Speed Graph
        G05881230Courtesy of NISSAN NORTH AMERICA, INC.
    7. Check 1st trip DTC.

      Is 1st trip DTC detected? 

      YES: Go to "DIAGNOSIS PROCEDURE ".

      NO: INSPECTION END