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Home >> Infiniti >> 2004 >> Q45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P1456: EVAP Control System >> DTC Confirmation Procedure
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DTC Confirmation Procedure

NOTE:
  • If DTC P1456 is displayed with P1442, perform TROUBLE DIAGNOSIS FOR DTC P1456 first.
  • After repair, make sure that the hoses and clips are installed properly.
  • If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

TESTING CONDITION: 

With CONSULT-II 

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

    FUEL LEVEL SE: 0.25 - 1.15V 

    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-II.

    Follow the instruction displayed.

    Fig 1: View Of CONSULT-II
    G00761175Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Make sure that "OK" is displayed.

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

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