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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 476 (Engine Control System (DTC/Circuit Diagnosis) (3 Of 3)) >> DTC/Circuit Diagnosis >> On Board Refueling Vapor Recovery (ORVR) >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECTION START 

    Check whether the following symptoms are present.

    A: Fuel odor from EVAP canister is strong.

    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 8.

  2. 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 2.5 kg (5.5 lb).

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    GO TO 4.

  3. CHECK IF EVAP CANISTER IS SATURATED WITH WATER 

    Check if water will drain from EVAP canister (1).

    GNSJSBIA0692Z-692Courtesy of NISSAN NORTH AMERICA, INC.

    2

    : EVAP canister vent control valve

    Does water drain from the EVAP canister?

    YES

    GO TO 4.

    NO

    GO TO 7.

  4. REPLACE EVAP CANISTER 

    Replace EVAP canister with a new one. Refer to Removal and Installation .

    GO TO 5.

  5. CHECK DRAIN FILTER 

    Refer to Component Inspection (Drain filter) .

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Replace drain filter. Refer to Removal and Installation .

  6. DETECT MALFUNCTIONING PART 

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

    Repair or replace EVAP hose. Refer to Removal and Installation .

  7. CHECK REFUELING EVAP VAPOR CUT VALVE 

    Refer to Component Inspection (Refueling EVAP vapor cut valve) .

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace refueling EVAP vapor cut valve with fuel tank. Refer to Removal and Installation - VQ40DE .

  8. 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 2.5 kg (5.5 lb).

    Is the inspection result normal?

    YES

    GO TO 9.

    NO

    GO TO 10.

  9. CHECK IF EVAP CANISTER IS SATURATED WITH WATER 

    Check if water will drain from EVAP canister (1).

    GNSJSBIA0692Z-692Courtesy of NISSAN NORTH AMERICA, INC.

    2

    : EVAP canister vent control valve

    Does water drain from the EVAP canister?

    YES

    GO TO 10.

    NO

    GO TO 13.

  10. REPLACE EVAP CANISTER 

    Replace EVAP canister with a new one. Refer to Removal and Installation .

    GO TO 11.

  11. CHECK DRAIN FILTER 

    Refer to Component Inspection (Drain filter) .

    Is the inspection result normal?

    YES

    GO TO 12.

    NO

    Replace drain filter. Refer to Removal and Installation .

  12. DETECT MALFUNCTIONING PART 

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

    Repair or replace EVAP hose.

  13. CHECK RECIRCULATION LINE 

    Check recirculation line for clogging, dents and cracks.

    Is the inspection result normal?

    YES

    GO TO 14.

    NO

    Replace fuel filler tube. Refer to Removal and Installation - VQ40DE .

  14. CHECK REFUELING EVAP VAPOR CUT VALVE 

    Refer to Component Inspection (Refueling EVAP vapor cut valve) .

    Is the inspection result normal?

    YES

    GO TO 15.

    NO

    Replace refueling EVAP vapor cut valve with fuel tank. Refer to Removal and Installation - VQ40DE .

  15. CHECK FUEL FILLER TUBE 

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

    Is the inspection result normal?

    YES

    GO TO 16.

    NO

    Replace fuel filler tube. Refer to Removal and Installation .

  16. CHECK ONE-WAY FUEL VALVE-1 

    Check one-way valve for clogging.

    Is the inspection result normal?

    YES

    GO TO 17.

    NO

    Repair or replace one-way fuel valve with fuel tank. Refer to Removal and Installation - VQ40DE .

  17. CHECK ONE-WAY FUEL VALVE-2 
    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 per the following.
      G04073663Courtesy of NISSAN NORTH AMERICA, INC.

      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 Removal and Installation - VQ40DE .

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