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Home >> Infiniti >> 2010 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0327 To P0850 >> DTC P0456: EVAP Control System >> DTC Confirmation Procedure
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DTC Confirmation Procedure

NOTE:
  • If DTC P0456 is displayed with P0442, first perform trouble diagnosis for DTC P0456. 
  • After repair, make sure that the hoses and clips are installed properly. 
  • If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
  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.

TESTING CONDITION: 

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, wait at least 10 seconds and then turn ON.
  4. Select "EVP V/S LEAK P0456/P1456" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT-III.

    Follow the instruction displayed.

  5. Make sure that "OK" is displayed.

    If "NG" is displayed, refer to "DIAGNOSIS PROCEDURE ".

    NOTE:
    • If the engine speed cannot be maintained within the range displayed on CONSULT-III screen, go to "BASIC INSPECTION ".
    • Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly.