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.

To locate the EVAP leak, install EVAP service port adapter and pressure pump to EVAP service port securely. For EVAP service port location, see Figure . For the location of EVAP service port, Refer to EVAPORATIVE EMISSION LINE DRAWING  .

Fig 1: Installing Pressure To EVAP Service Port Adapter

Courtesy of NISSAN MOTOR CO., U.S.A.

1. With CONSULT-II: go to 6.
2. Without CONSULT-II: go to  7 .

With CONSULT-II 

1. Turn ignition switch ON.
2. Select EVAP SYSTEM CLOSE of WORK SUPPORT mode with CONSULT-II.
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.
Fig 2: Using CONSULT-II To Monitor Pressure Applied To EVAP System
Courtesy 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.
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  8 .
   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.)
   Fig 3: Locating EVAP Canister System

   Courtesy of NISSAN MOTOR CO., U.S.A.
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.
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 8.
   2. NG: Repair or replace.

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 9.
2. NG: Repair or replace EVAP canister vent control valve and "O" ring.

1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
Fig 4: Identifying EVAP Canister & Vent Control Valve
Courtesy of NISSAN MOTOR CO., U.S.A.
2. Does water drain from the EVAP canister?

Yes or No

1. Yes: go to 10.
2. No (With CONSULT-II): go to  12 .
3. No (Without CONSULT-II): go to  13 .

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

The weight should be less than 2.1 kg (4.6 lb)  .

OK or NG

1. OK (With CONSULT-II): go to  12 .
2. OK (Without CONSULT-II): go to  13 .
3. NG: go to 11.

Check the following.

• EVAP canister for damage
• EVAP hose between EVAP canister and vehicle frame for clogging or poor connection
  1. Repair hose or replace EVAP canister.

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. See Figure .
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  15 .
   2. NG: go to  14 .

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.

   Vacuum should exist  .

OK or NG

1. OK: go to  16 .
2. NG: go to 14.

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

OK or NG

1. OK: go to 15.
2. NG: Repair or reconnect the hose.

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 purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection. Refer to EVAPORATIVE EMISSION LINE DRAWING  .

OK or NG

1. OK: go to 19.
2. NG: Repair or reconnect the hose.

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

1. Go to 20.

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 21.
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 22.
2. NG : Repair or replace hose, tube or filler neck tube.

Refer to COMPONENT INSPECTION  .

OK or NG

1. OK: go to 23.
2. NG: Replace refueling EVAP vapor cut valve with fuel tank.

Refer to CHECK FUEL LEVEL SENSOR UNIT .

OK or NG

1. OK: go to 24.
2. NG: Replace fuel level sensor unit.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  .

1. Inspection end