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Home >> Infiniti >> 2008 >> G35 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS P0441 Through P0643 >> DTC P0456: EVAP Control System >> DTC Logic >> DTC Confirmation Procedure
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DTC Confirmation Procedure

  1. INSPECTION START

    Do you have CONSULT-III?

    Do you have CONSULT-III? 

    YES: GO TO 2.

    NO: GO TO  4.

  2. PRECONDITIONING

    If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

    NOTE: After repair, make sure that the hoses and clips are installed properly.

    TESTING CONDITION: 

    • Open engine hood before conducting following procedure. 
    • If any of following conditions are met just before the DTC confirmation procedure, leave the vehicle for more than 1 hour. 
      • Fuel filler cap is removed. 
      • Fuel is refilled or drained. 
      • EVAP component parts is/are removed. 
    • Before performing the following procedure, confirm that battery voltage is more than 11V at idle. 
    • Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly. 

      GO TO 3.

  3. PERFORM DTC CONFIRMATION PROCEDURE

    With CONSULT-III 

    1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-III.
    2. Make sure the following conditions are met.

      FUEL LEVEL SE: 0.25 - 1.4V 

      COOLAN TEMP/S: 0 - 32°C (32 - 90°F) 

      FUEL T/TMP SE: 0 - 35°C (32 - 95°F) 

      INT A/TEMP SE: More than 0°C (32°F) 

      If NG, turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle) or refilling/draining fuel until the output voltage condition of the "FUEL LEVEL SE" meets within the range above and leave the vehicle for more than 1 hour. Then start from step  1).

    3. Turn ignition switch OFF and wait at least 10 seconds.
    4. Turn ignition switch ON.
    5. Select "EVAP V/S LEAK P0456/P1456" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT-III.

      Follow the instruction displayed.

      NOTE: If the engine speed cannot be maintained within the range displayed on CONSULT-III screen, go to "BASIC INSPECTION : SPECIAL REPAIR REQUIREMENT ".

    Which is displayed on CONSULT-III screen? 

    OK: INSPECTION END

    NG: Go to "DIAGNOSIS PROCEDURE ".

  4. PERFORM COMPONENT FUNCTION CHECK

    Perform component function check. Refer to "COMPONENT FUNCTION CHECK ".

    NOTE: Use component function check to check the overall function of the EVAP very small leak function. 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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