Diagnostic Procedure

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.

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.

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

OK or NG

1. OK: go to  5 .
2. NG: go to 4.

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

OK or NG

1. OK: go to 5.
2. NG: Replace fuel filler cap with a genuine one.

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.

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

1. Go to 7.

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

  1. OK: go to 8.
  2. NG: Repair or replace EVAP canister vent control valve and "O" ring.

To locate the EVAP leak, install EVAP service port adapter and pressure pump to EVAP service port securely. See Figure . For EVAP service port location, see Figure .

1. With CONSULT-II: go to 9.
2. Without CONSULT-II: go to  10 .

With CONSULT-II 

1. Turn ignition switch ON.
2. Select EVAP SYSTEM CLOSE of WORK SUPPORT mode with CONSULT-II.
NOTE:
• Do not 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.
3. Touch START and apply pressure into the EVAP line until the pressure indicator reaches the middle of the bar graph. See Figure .
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  .

   OK or NG

   1. OK: go to  11 .
   2. NG: Repair or replace.

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.) See Figure .
NOTE:
• Do not 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.
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.
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  .

   OK or NG

   1. OK: go to  12 .
   2. NG: Repair or replace.

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 1: Monitoring Systems During Active Test Mode (CONSULT-II)

   Courtesy 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 .

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.

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.

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. See Fig 1 .

OK or NG

1. OK: go to  16 .
2. NG: go to 15.

Refer to COMPONENT INSPECTION  .

OK or NG

1. OK: go to 16.
2. NG: Replace EVAP canister purge volume control solenoid valve.

Refer to COMPONENT INSPECTION  .

OK or NG

1. OK: go to 17.
2. NG: Replace fuel level sensor unit.

Refer to COMPONENT INSPECTION  .

OK or NG

1. OK: go to 18.
2. NG: Replace EVAP control system pressure sensor.

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.

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.

Refer to REFUELING EVAP VAPOR CUT VALVE  .

OK or NG

1. OK: go to 21.
2. NG: Replace refueling EVAP vapor cut valve with fuel tank.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  .

1. Inspection end