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Home >> Infiniti >> 2010 >> FX35 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (VQ35HR) - DTC P0196 Through P0607 >> DTC P0455: EVAP Control System >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK FUEL FILLER CAP DESIGN 
    1. Turn ignition switch OFF.
    2. Check for genuine NISSAN fuel filler cap design.

      Is the inspection result normal? 

      YES: GO TO  2.

      NO: Replace with genuine NISSAN fuel filler cap.

      Fig 1: Identifying Nissan Fuel Filler Cap
      G04875212Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK FUEL FILLER CAP INSTALLATION 

    Check that the cap is tightened properly by rotating the cap clockwise.

    Is the inspection result normal? 

    YES: GO TO  3.

    NO: Open fuel filler cap, then clean cap and fuel filler neck threads using air blower. Retighten until ratcheting sound is heard.

  3. CHECK FUEL FILLER CAP FUNCTION 

    Check for air releasing sound while opening the fuel filler cap.

    Is the inspection result normal? 

    YES: GO TO  5.

    NO: GO TO  4.

  4. CHECK FUEL TANK VACUUM RELIEF VALVE 

    Refer to COMPONENT INSPECTION .

    Is the inspection result normal? 

    YES: GO TO  5.

    NO: Replace fuel filler cap with a genuine one.

  5. CHECK EVAP PURGE LINE 

    Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks, improper connection or disconnection.

    Refer to SYSTEM DIAGRAM .

    Is the inspection result normal? 

    YES: GO TO  6.

    NO: Repair or reconnect the hose.

  6. CLEAN EVAP PURGE LINE 

    Clean EVAP purge line (pipe and rubber tube) using air blower.

    GO TO  7.

  7. CHECK EVAP CANISTER VENT CONTROL VALVE 

    Check the following.

    • EVAP canister vent control valve is installed properly.

      Refer to REMOVAL AND INSTALLATION .

    • EVAP canister vent control valve.

      Refer to COMPONENT INSPECTION .

      Is the inspection result normal? 

      YES: GO TO  8.

      NO: Repair or replace EVAP canister vent control valve and O-ring.

  8. CHECK FOR EVAP LEAK 

    Refer to INSPECTION .

    Is there any leak in EVAP line? 

    YES: Repair or replace malfunctioning part.

    NO-1: With CONSULT-III: GO TO  9.

    NO-2: Without CONSULT-III: GO TO  10.

  9. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION 

    With CONSULT-III 

    1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port.
    2. Start engine and let it idle.
    3. Select "PURG VOL CONT/V" in "ACTIVE TEST" mode.
    4. Touch "Qu" on CONSULT-III screen to increase "PURG VOL CONT/V" opening to 100%.
    5. Check vacuum hose for vacuum.

      Vacuum should exist. 

      Is the inspection result normal? 

      YES: GO TO  12.

      NO: GO TO  11.

  10. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION 

    Without CONSULT-III 

    1. Start engine and warm it up to normal operating temperature.
    2. Stop engine.
    3. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port.
    4. Start engine and let it idle for at least 80 seconds.
    5. Check vacuum hose for vacuum when revving engine up to 2,000 RPM.

      Vacuum should exist. 

      Is the inspection result normal? 

      YES: GO TO  13.

      NO: GO TO  11.

  11. CHECK VACUUM HOSE 

    Check vacuum hoses for clogging or disconnection. Refer to SYSTEM DIAGRAM .

    Is the inspection result normal? 

    YES-1: With CONSULT-III: GO TO  12.

    YES-2: Without CONSULT-III: GO TO  13.

    NO: Repair or reconnect the hose.

  12. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE 

    With CONSULT-III 

    1. Start engine.
    2. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III. Check that engine speed varies according to the valve opening.

      Does engine speed vary according to the valve opening? 

      YES: GO TO  14.

      NO: GO TO  13.

  13. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE 

    Refer to COMPONENT INSPECTION .

    Is the inspection result normal? 

    YES: GO TO  14.

    NO: Replace EVAP canister purge volume control solenoid valve.

  14. CHECK FUEL TANK TEMPERATURE SENSOR 

    Refer to COMPONENT INSPECTION .

    Is the inspection result normal? 

    YES: GO TO  15.

    NO: Replace "fuel level sensor unit and fuel pump".

  15. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR 

    Refer to COMPONENT INSPECTION .

    Is the inspection result normal? 

    YES: GO TO  16.

    NO: Replace EVAP control system pressure sensor.

  16. CHECK EVAP/ORVR LINE 

    Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper connection. For location, refer to DESCRIPTION .

    Is the inspection result normal? 

    YES: GO TO  17.

    NO: Repair or replace hoses and tubes.

  17. CHECK RECIRCULATION LINE 

    Check recirculation line between filler neck tube and fuel tank for clogging, kinks, cracks, looseness and improper connection.

    Is the inspection result normal? 

    YES: GO TO  18.

    NO: Repair or replace hose, tube or filler neck tube.

  18. CHECK REFUELING EVAP VAPOR CUT VALVE 

    Refer to COMPONENT INSPECTION .

    Is the inspection result normal? 

    YES: GO TO  19.

    NO: Replace refueling EVAP vapor cut valve with fuel tank.

  19. CHECK INTERMITTENT INCIDENT 

    Refer to INTERMITTENT INCIDENT .

    INSPECTION END

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