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Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUEL FILLER CAP DESIGN 
    1. Turn ignition switch OFF.
    2. Check for genuine NISSAN fuel filler cap design.

    OK or NG 

    1. OK: GO TO 2.
    2. NG: Replace with genuine NISSAN fuel filler cap.
    Fig 1: Checking Genuine Nissan Fuel Filler Cap Design
    G00775507Courtesy 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 

    1. OK: GO TO 3.
    2. NG:
      1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
      2. Retighten until ratcheting sound is heard.
  3. CHECK FUEL FILLER CAP FUNCTION 

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

    OK or NG 

    1. OK: GO TO  5 .
    2. NG: GO TO 4.
  4. CHECK FUEL TANK VACUUM RELIEF VALVE 

    Refer to FUEL TANK VACUUM RELIEF VALVE 1 BUILT INTO FUEL FULLER CAP)  .

    OK or NG 

    1. OK: GO TO 5.
    2. NG: 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 EVAPORATIVE EMISSION LINE DRAWING  .

    OK or NG 

    1. OK: GO TO 6.
    2. NG: Repair or reconnect the hose.
  6. CLEAN EVAP PURGE LINE 

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

    1. GO TO 7.
  7. CHECK EVAP CANISTER VENT CONTROL VALVE 

    Check the following.

    OK or NG 

    1. OK: GO TO 8.
    2. NG: Repair or replace EVAP canister vent control valve and O-ring.
  8. INSTALL THE PRESSURE PUMP 

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

    NOTE: Improper installation of the EVAP service port adapter to the EVAP service port may cause leaking.
    Fig 2: Installing Pressure Pump (1 Of 2)
    G00775508Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 3: Installing Pressure Pump (2 Of 2)
    G00775509Courtesy of NISSAN MOTOR CO., U.S.A.
    1. Models with CONSULT-II:GO TO 9.
    2. Models without CONSULT-II:GO TO  10 .
  9. CHECK FOR EVAP LEAK 

    WITH CONSULT-II

    1. Turn ignition switch ON.
    2. Select "EVAP SYSTEM CLOSE" of "WORK SUPPORT" mode with CONSULT-II.
      Fig 4: Displaying EVAP System Close Screen
      G00775510Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Touch "START" and apply pressure into the EVAP line until the pressure indicator reaches the middle of the bar graph.
      NOTE:
      • Never use compressed air or a high pressure pump.
      • Do not 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 instruction manual for more details.

      Refer to EVAPORATIVE EMISSION LINE DRAWING  .

      Fig 5: Identifying EVAP Leak Detector
      G00775511Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO  11 .
    2. NG: Repair or replace.
  10. CHECK FOR EVAP LEAK 

    Without CONSULT-II

    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.)
      Fig 6: Checking EVAP Leak
      G00775512Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Pressurize the EVAP line using pressure pump with 1.3 to 2.7 kPa (10 to 20 mmHg, 0.39 to 0.79 inHg), then remove pump and EVAP service port adapter.
      NOTE:
      • Never use compressed air or a high pressure pump.
      • Do not 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 instruction manual for more details. Refer to EVAPORATIVE EMISSION LINE DRAWING  .
      Fig 7: Identifying EVAP Leak Detector
      G00775513Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO  12 .
    2. NG: Repair or replace.
  11. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION 

    With CONSULT-II 

    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.
      Fig 8: Displaying Active Test Screen
      G00775514Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Touch "Qu" on CONSULT-II screen to increase "PURG VOL CONT/V" opening to 100%.
    5. Check vacuum hose for vacuum when revving engine up to 2,000 RPM.

    OK or NG 

    1. OK: GO TO  14 .
    2. NG: GO TO  13 .
  12. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION 

    Without CONSULT-II

    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.
      1. Vacuum should exist. 

    OK or NG 

    1. OK: GO TO  15 .
    2. NG: GO TO 13.
  13. CHECK VACUUM HOSE 

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

    OK or NG 

    1. OK (With CONSULT-II): GO TO 14.
    2. OK (Without CONSULT-II): GO TO  15 .
    3. NG: Repair or reconnect the hose.
  14. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE 

    WITH CONSULT-II

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

    OK or NG 

    1. OK: GO TO  16 .
    2. NG: GO TO 15.
    Fig 9: Displaying Active Test Screen
    G00775515Courtesy of NISSAN MOTOR CO., U.S.A.
  15. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE 

    Refer to COMPONENT INSPECTION  .

    OK or NG 

    1. OK: GO TO 16.
    2. NG: Replace EVAP canister purge volume control solenoid valve.
  16. CHECK FUEL TANK TEMPERATURE SENSOR 

    Refer to COMPONENT INSPECTION  .

    OK or NG 

    1. OK: GO TO 17.
    2. NG: Replace fuel level sensor unit.
  17. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR 

    Refer to COMPONENT INSPECTION  .

    OK or NG 

    1. OK: GO TO 18.
    2. NG: Replace EVAP control system pressure sensor.
  18. CHECK EVAP/ORVR LINE 

    Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kink, looseness and improper connection. For location, refer to ON BOARD REFUELING VAPOR RECOVERY (ORVR)  .

    OK or NG 

    1. OK: GO TO 19.
    2. NG: Repair or replace hoses and tubes.
  19. CHECK RECIRCULATION LINE 

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

    OK or NG 

    1. OK: GO TO 20.
    2. NG: Repair or replace hose, tube or filler neck tube.
  20. CHECK REFUELING EVAP VAPOR CUT VALVE 

    Refer to COMPONENT INSPECTION  .

    OK or NG 

    1. OK: GO TO 21.
    2. NG: Replace refueling EVAP vapor cut valve with fuel tank.
  21. CHECK INTERMITTENT INCIDENT 

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  .

    1. INSPECTION END 
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