Diagnosis Procedure

Check whether the following symptoms are present.

1. A: Fuel odor from EVAP canister is strong.
2. B: Cannot refuel/Fuel odor from the fuel filler opening is strong while refueling.

Which symptom is present? 

A: Go to 2.

B: Go to  7.

1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached. Refer to " REMOVAL AND INSTALLATION ".
2. Weigh the EVAP canister with 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: Go to 3.

NO: Go to  4.

Check if water will drain from EVAP canister.

Does water drain from the EVAP canister? 

YES: Go to 4.

NO: Go to  6.

Fig 1: Checking EVAP Canister Water

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

Replace EVAP canister with a new one. Refer to " REMOVAL AND INSTALLATION ".

Go to 5.

Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.

Repair or replace EVAP hose.

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: INSPECTION END

NO: Replace refueling EVAP vapor cut valve with fuel tank. Refer to " 2WD : REMOVAL AND INSTALLATION " (2WD models) or " AWD : REMOVAL AND INSTALLATION " (AWD models).

1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached. Refer to " REMOVAL AND INSTALLATION ".
2. Weigh the EVAP canister with 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: Go to 8.

NO: Go to  9.

Check if water will drain from EVAP canister.

Does water drain from the EVAP canister? 

YES: Go to 9.

NO: Go to  11.

Fig 2: Checking EVAP Canister Water

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

Replace EVAP canister with a new one. Refer to " REMOVAL AND INSTALLATION ".

Go to 10.

Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.

Repair or replace EVAP hose.

Check hoses and tubes between EVAP canister and refueling control valve for clogging, kinks, looseness and improper connection.

Is the inspection result normal? 

YES: Go to 12.

NO: Repair or replace hoses and tubes.

Check recirculation line for clogging, dents and cracks.

Is the inspection result normal? 

YES: Go to 13.

NO: Replace fuel filler tube. Refer to " 2WD : REMOVAL AND INSTALLATION " (2WD models) or " AWD : REMOVAL AND INSTALLATION " (AWD models).

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: Go to 14.

NO: Replace refueling EVAP vapor cut valve with fuel tank. Refer to " 2WD : REMOVAL AND INSTALLATION " (2WD models) or " AWD : REMOVAL AND INSTALLATION " (AWD models).

Check fuel filler tube and hose connected to the fuel tank for clogging, dents and cracks.

Is the inspection result normal? 

YES: Go to 15.

NO: Replace fuel filler tube. Refer to " 2WD : REMOVAL AND INSTALLATION " (2WD models) or " AWD : REMOVAL AND INSTALLATION " (AWD models).

Check one-way valve for clogging.

Is the inspection result normal? 

YES: Go to 16.

NO: Repair or replace one-way fuel valve with fuel tank. Refer to " 2WD : REMOVAL AND INSTALLATION " (2WD models) or " AWD : REMOVAL AND INSTALLATION " (AWD models).

1. Check that fuel is drained from the tank.
2. Remove fuel filler tube and hose. Refer to " 2WD : REMOVAL AND INSTALLATION " (2WD models) or " AWD : REMOVAL AND INSTALLATION " (AWD models).
3. Check one-way fuel valve for operation as follows.

   When a stick is inserted, the valve should open, when removing stick it should close.

Do not drop any material into the tank  .

Is the inspection result normal? 

YES: INSPECTION END

NO: Replace fuel filler tube or replace one-way fuel valve with fuel tank. Refer to " 2WD : REMOVAL AND INSTALLATION " (2WD models) or " AWD : REMOVAL AND INSTALLATION " (AWD models).

Fig 3: Checking One-Way Fuel Valve Operation

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