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Home >> Nissan-Datsun >> 2011 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0137 To P0445 (Qr25DE) >> DTC P0442 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.

    OK or NG 

    OK: GO TO 2.

    NG: Replace with genuine NISSAN fuel filler cap. Refer to "COMPONENT ".

    Fig 1: Identifying Nissan Fuel Filler Cap
    G07144259Courtesy 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.

    OK or NG 

    OK: GO TO 3.

    NG:

    1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
    2. Retighten until reteaching sound is heard.

  3. CHECK FUEL FILLER CAP FUNCTION

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

    OK or NG 

    OK: GO TO  5.

    NG: GO TO 4.

  4. CHECK FUEL TANK VACUUM RELIEF VALVE

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 5.

    NG: Replace fuel filler cap with a genuine one. Refer to "COMPONENT ".

  5. INSTALL THE PRESSURE PUMP

    To locate the EVAP leak, install EVAP service port (1) adapter and pressure pump to EVAP service port securely.

    For the location of EVAP service port, refer to "DESCRIPTION ".

    • : Vehicle front
    NOTE: Improper installation of the EVAP service port adapter to the EVAP service port may cause leaking.
    Fig 2: Location Of EVAP Service Port
    G07144260Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 3: Connecting Pressure Pump To EVAP Service Port Adapter
    G07144261Courtesy of NISSAN MOTOR CO., U.S.A.

    With CONSULT-III: GO TO 6.

    Without CONSULT-III: GO TO  7.

  6. CHECK FOR EVAP LEAK

    With CONSULT-III 

    1. Turn ignition switch ON.
    2. Select "EVAP SYSTEM CLOSE" of "WORK SUPPORT" mode with CONSULT-III.
    3. Touch "START" and apply pressure into the EVAP line until the pressure indicator reaches the middle of the bar graph.
      CAUTION:
      • Never use compressed air or a high pressure pump.
      • Never exceed 4.12 kPa (0.042 kg/cm2 , 0.6 psi) of pressure in the system.
    4. Using EVAP leak detector, locate the EVAP leak. For the leak detector, refer to the manufacturer's instructions for more details.

      Refer to "DESCRIPTION ".

    OK or NG 

    OK: GO TO  8.

    NG: Repair or replace.

    Fig 4: Identifying EVAP Leak Detector
    G07144262Courtesy of NISSAN MOTOR CO., U.S.A.
  7. CHECK FOR EVAP LEAK

    Without CONSULT-III 

    1. Turn ignition switch OFF.
    2. Apply 12 volts DC to EVAP canister vent control valve. The valve will close. (Continue to apply 12 volts until the end of test.)
      • This illustration is a view from under vehicle
      • EVAP control system pressure sensor (1)
      • EVAP canister (2)
      • EVAP canister vent control valve (3)
    3. Pressurize the EVAP line using pressure pump with 1.3 to 2.7 kPa (0.013 to 0.028 kg/cm2 , 0.19 to 0.39 psi), then remove pump and EVAP service port adapter.
      CAUTION:
      • Never use compressed air or a high pressure pump.
      • Never exceed 4.12 kPa (0.042 kg/cm2 , 0.6 psi) of pressure in the system.
      Fig 5: Location Of EVAP Control System Pressure Sensor, EVAP Canister And EVAP Canister Vent Control Valve
      G07144263Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Using EVAP leak detector, locate the EVAP leak. For the leak detector, refer to the manufacturer's instructions for more details. Refer to "DESCRIPTION ".

    OK or NG 

    OK: GO TO 8.

    NG: Repair or replace.

    Fig 6: Identifying EVAP Leak Detector
    G07144264Courtesy of NISSAN MOTOR CO., U.S.A.
  8. CHECK DRAIN FILTER

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 9.

    NG: Replace drain filter.

  9. 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 ".

    OK or NG 

    OK: GO TO 10.

    NG: Repair or replace EVAP canister vent control valve and O-ring. Refer to "REMOVAL AND INSTALLATION ".

  10. CHECK IF EVAP CANISTER SATURATED WITH WATER
    1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached. Refer to "REMOVAL AND INSTALLATION ".
    2. Does water drain from the EVAP canister?

    Yes or No 

    Yes: GO TO 11.

    No (With CONSULT-III): GO TO  13.

    No (Without CONSULT-III): GO TO  14.

    Fig 7: Checking EVAP Canister For Water
    G07144265Courtesy of NISSAN MOTOR CO., U.S.A.
  11. CHECK EVAP CANISTER

    Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensorattached.

    The weight should be less than 1.9 kg (4.2 lb).

    OK or NG 

    OK (With CONSULT-III): GO TO  13.

    OK (Without CONSULT-III): GO TO  14.

    NG: GO TO 12.

  12. DETECT MALFUNCTIONING PART

    Check the following.

    • EVAP canister for damage
    • EVAP hose connected to EVAP canister and vehicle frame for clogging or poor connection

    Repair hose or replace EVAP canister. Refer to "REMOVAL AND INSTALLATION ".

  13. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

    With CONSULT-III 

    1. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
    2. Start engine.
    3. Perform "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  .

    OK or NG 

    OK: GO TO  16.

    NG: GO TO  15.

  14. 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 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  .

    OK or NG 

    OK: GO TO  17.

    NG: GO TO 15.

  15. CHECK VACUUM HOSE

    Check vacuum hoses for clogging or disconnection. Refer to "VACUUM HOSE DRAWING ".

    OK or NG 

    OK: GO TO 16.

    NG: Repair or reconnect the hose.

  16. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 17.

    NG: Replace EVAP canister purge volume control solenoid valve. Refer to "REMOVAL AND INSTALLATION ".

  17. CHECK FUEL TANK TEMPERATURE SENSOR

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 18.

    NG: Replace fuel level sensor unit. Refer to "REMOVAL AND INSTALLATION ".

  18. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 19.

    NG: Replace EVAP control system pressure sensor. Refer to "REMOVAL AND INSTALLATION ".

  19. CHECK EVAP PURGE LINE

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

    Refer to EVAPORATIVE EMISSION SYSTEM .

    OK or NG 

    OK: GO TO 20.

    NG: Repair or reconnect the hose.

  20. CLEAN EVAP PURGE LINE

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

    GO TO 21.

  21. 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 ON BOARD REFUELING VAPOR RECOVERY (ORVR) .

    OK or NG 

    OK: GO TO 22.

    NG: Repair or replace hoses and tubes.

  22. CHECK RECIRCULATION LINE

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

    OK or NG 

    OK: GO TO 23.

    NG: Repair or replace hoses, tubes or filler neck tube. Refer to "REMOVAL AND INSTALLATION ".

  23. CHECK REFUELING EVAP VAPOR CUT VALVE

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 24.

    NG: Replace refueling EVAP vapor cut valve with fuel tank. Refer to "REMOVAL AND INSTALLATION ".

  24. CHECK FUEL LEVEL SENSOR

    Refer to FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY .

    OK or NG 

    OK: GO TO 25.

    NG: Replace fuel level sensor unit. Refer to "REMOVAL AND INSTALLATION ".

  25. CHECK INTERMITTENT INCIDENT

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

INSPECTION END 

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