Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check for genuine NISSAN fuel filler cap design.

   Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

GO TO 2.

NO

Replace with genuine NISSAN fuel filler cap.

Check that the cap is tightened properly by rotating the cap clockwise.

Is the inspection result normal?

YES

GO TO 3.

NO

Open fuel filler cap, then clean cap and fuel filler neck threads using air blower. Then retighten until ratcheting sound is heard.

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

Is the inspection result normal?

YES

GO TO  5.

NO

GO TO 4.

Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 5.

NO

Replace fuel filler cap with a genuine one.

Refer to Inspection .

Is there any leak in EVAP line?

YES

Repair or replace.

NO

GO TO 6.

Check the following.

• EVAP canister vent control valve is installed properly.

  Refer to Exploded View .

• EVAP canister vent control valve.

  Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 7.

NO

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.

   Courtesy of NISSAN NORTH AMERICA, INC.

2. Check if water will drain from EVAP canister.

Does water drain from the EVAP canister?

YES

GO TO  8.

NO

With CONSULT: Go to  10 .

NO

Without CONSULT: Go to  11 .

Weigh the EVAP canister assembly 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).

Is the inspection result normal?

YES

With CONSULT: Go to  10 .

YES

Without CONSULT: Go to  11 .

NO

GO TO 9.

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

1. Disconnect vacuum hose connected to EVAP service port and EVAP canister purge volume control solenoid valve from EVAP service port.
2. Start engine and let it idle.
3. Select "PURG VOL CONT/V" in "ACTIVE TEST" mode.
4. Touch "Qu" on CONSULT screen to increase "PURG VOL C/V" opening to 100%.
5. Check vacuum hose for vacuum.

   Vacuum should exist.

Is the inspection result normal?

YES

GO TO  13.

NO

GO TO  12.

Without CONSULT

1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose connected to EVAP service port and EVAP canister purge volume control solenoid valve from 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.

Is the inspection result normal?

YES

GO TO  13.

NO

GO TO 12.

Check vacuum hoses for clogging or disconnection. Refer to System Description .

Is the inspection result normal?

YES

GO TO 13.

NO

Repair or reconnect the hose.

Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 14.

NO

Replace EVAP canister purge volume control solenoid valve. Refer to Exploded View .

Refer to Component Inspection (Fuel Tank Temperature Sensor) .

Is the inspection result normal?

YES

GO TO 15.

NO

Replace fuel level sensor unit.

Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 16.

NO

Replace EVAP control system pressure sensor. Refer to Exploded View .

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

Refer to System Description .

Is the inspection result normal?

YES

GO TO 17.

NO

Repair or reconnect the hose.

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

GO TO 18.

Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper connection. For location, refer to Diagnosis Procedure .

Is the inspection result normal?

YES

GO TO 19.

NO

Repair or replace hoses and tubes.

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

Is the inspection result normal?

YES

GO TO 20.

NO

Repair or replace hose, tube or filler tube.

Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 21.

NO

Replace refueling EVAP vapor cut valve with fuel tank. Refer to Exploded View .

Refer to Component Inspection .

Is the inspection result normal?

YES

INSPECTION END

NO

Replace fuel level sensor unit. Refer to Removal and Installation .