Diagnostic Procedure

SYMPTOM: FUEL ODOR FROM EVAP CANISTER IS STRONG. 

1. CHECK EVAP CANISTER 
   1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
   2. Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.

      The weight should be less than 1.9 kg (4.2 lb). 

   OK or NG 

   1. OK : GO TO 2.
   2. NG : GO TO  3.
2. CHECK IF EVAP CANISTER SATURATED WITH WATER 

   Does water drain from the EVAP canister?

   Fig 1: Checking EVAP Canister Saturated With Water

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

   Yes or No 

   1. Yes : GO TO 3.
   2. No : GO TO  5.
3. REPLACE EVAP CANISTER 

   Replace EVAP canister with a new one.

   1. : GO TO 4. 
4. DETECT MALFUNCTIONING PART 

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

   1. : Repair or replace EVAP hose. 
5. CHECK REFUELING CONTROL VALVE 

   Refer to "COMPONENT INSPECTION ".

   OK or NG 

   1. OK : GO TO 6.
   2. NG : Replace refueling control valve.
6. CHECK REFUELING EVAP VAPOR CUT VALVE 

   Refer to "COMPONENT INSPECTION ".

   OK or NG 

   1. OK : INSPECTION END. 
   2. NG : Replace refueling EVAP vapor cut valve with fuel tank.

SYMPTOM: CANNOT REFUEL/FUEL ODOR FROM THE FUEL FILLER OPENING IS STRONG WHILE REFUELING. 

1. CHECK EVAP CANISTER 
   1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
   2. Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.

      The weight should be less than 1.9 kg (4.2 lb).  .

   OK or NG 

   1. OK : GO TO 2.
   2. NG : GO TO  3.
2. CHECK IF EVAP CANISTER SATURATED WITH WATER 

   Does water drain from the EVAP canister?

   Fig 2: Checking EVAP Canister Saturated With Water

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

   Yes or No 

   1. Yes : GO TO 3.
   2. No : GO TO  5.
3. REPLACE EVAP CANISTER 

   Replace EVAP canister with a new one.

   1. : GO TO 4. 
4. DETECT MALFUNCTIONING PART 

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

   1. : Repair or replace EVAP hose. 
5. CHECK VENT HOSES AND VENT TUBES 

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

   OK or NG 

   1. OK : GO TO 6.
   2. NG : Repair or replace hoses and tubes.
6. CHECK FILLER NECK TUBE 

   Check signal line and recirculation line for clogging, dents and cracks.

   OK or NG 

   1. OK : GO TO 7.
   2. NG : Replace filler neck tube.
7. CHECK REFUELING CONTROL VALVE 

   Refer to "COMPONENT INSPECTION ".

   OK or NG 

   1. OK : GO TO 8.
   2. NG : Replace refueling control valve.
8. CHECK REFUELING EVAP VAPOR CUT VALVE 

   Refer to "COMPONENT INSPECTION ".

   OK or NG 

   1. OK : GO TO 9.
   2. NG : Replace refueling EVAP vapor cut valve with fuel tank.
9. CHECK FUEL FILLER TUBE 

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

   OK or NG 

   1. OK : GO TO 10.
   2. NG : Replace fuel filler tube.
10. CHECK ONE-WAY FUEL VALVE-I 

    Check one-way valve for clogging.

    OK or NG 

    1. OK : GO TO 11.
    2. NG : Repair or replace one-way fuel valve with fuel tank.
11. CHECK ONE-WAY FUEL VALVE-II 
    1. Make sure that fuel is drained from the tank.
    2. Remove fuel filler tube and hose.
    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.  .

    Fig 3: Checking One-Way Fuel Valve-II
    Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : INSPECTION END
    2. NG : Replace fuel filler tube or replace one-way fuel valve with fuel tank.