Diagnosis Procedure

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.

Fig 1: Identifying Nissan Fuel Filler Cap

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

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 ratcheting sound is heard.

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

OK or NG 

OK: GO TO  5.

NG: GO TO 4.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 5.

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.

Fig 2: Attaching EVAP Service Port Adapter Securely To EVAP Service Port

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

Fig 3: Connecting Pressure Pump To EVAP Service Port Adapter

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

With CONSULT-III: GO TO 6.

Without CONSULT-III: GO TO  7.

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.
   • 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 "DESCRIPTION ".

OK or NG 

OK: GO TO  8.

NG: Repair or replace.

Fig 4: Identifying EVAP Leak Detector

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

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.)
   Fig 5: Applying Battery Voltage Between Terminals Of EVAP Canister Vent Control Valve

   Courtesy 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.
   CAUTION:

   • 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 "DESCRIPTION ".

OK or NG 

OK: GO TO 8.

NG: Repair or replace.

Fig 6: Identifying EVAP Leak Detector

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

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 9.

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.
2. Does water drain from the EVAP canister?

Yes or No 

Yes: GO TO 10.

No (With CONSULT-III): GO TO  12.

No (Without CONSULT-III): GO TO  13.

Fig 7: Checking EVAP Canister Saturated With Water

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

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

The weight should be less than 2.5 kg (5.5 lb). 

OK or NG 

OK (With CONSULT-III): GO TO  12.

OK (Without CONSULT-III): GO TO  13.

NG: GO TO 11.

Check the following.

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

Repair hose or replace EVAP canister.

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 when revving engine up to 2, 000 RPM.

   Vacuum should exist. 

OK or NG 

OK: GO TO  15.

NG: GO TO  14.

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  16.

NG: GO TO 14.

Check vacuum hoses for clogging or disconnection. Refer to "DESCRIPTION ".

OK or NG 

OK: GO TO 15.

NG: Repair or reconnect the hose.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 16.

NG: Replace EVAP canister purge volume control solenoid valve.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 17.

NG: Replace fuel level sensor unit.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 18.

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 "DESCRIPTION ".

OK or NG 

OK: GO TO 19.

NG: Repair or reconnect the hose.

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

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 

OK: GO TO 21.

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 

OK: GO TO 22.

NG: Repair or replace hose, tube or filler neck tube.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 23.

NG: Replace refueling EVAP vapor cut valve with fuel tank.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 24.

NG: Replace fuel level sensor unit.

Refer to "HOW TO CHECK TERMINAL " and "INTERMITTENT INCIDENT ".

INSPECTION END