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Home >> Infiniti >> 2012 >> G25 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0443 To P1084 >> DTC P0456: EVAP Control System >> DTC Logic >> DTC Confirmation Procedure
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DTC Confirmation Procedure

  1. INSPECTION START

    Will CONSULT be used?

    Will CONSULT be used? 

    YES: GO TO 2.

    NO: GO TO  4.

  2. PRECONDITIONING

    With CONSULT 

    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.
    NOTE: After repair, check 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 11 V at idle. 
    • Check that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly. 

      GO TO 3.

  3. PERFORM DTC CONFIRMATION PROCEDURE
    1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT.
    2. Check the following conditions are met.

      FUEL LEVEL SE: 0.25 - 1.4 V 

      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 "EVP V/S LEAK P0456/P1456" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT.

      Follow the instruction displayed.

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

      Which is displayed on CONSULT screen? 

      OK: INSPECTION END

      NG: Go to "DIAGNOSIS PROCEDURE ".

  4. PERFORM COMPONENT FUNCTION CHECK

    Without CONSULT 

    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 ".