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Home >> Nissan-Datsun >> 2012 >> Juke AWD L4-1.6L Turbo (MR16DDT) >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Evaporative Emissions System >> Refueling Vapor Recovery System >> Testing and Inspection

Refueling Vapor Recovery System: Testing and Inspection




ON BOARD REFUELING VAPOR RECOVERY (ORVR)

Component Function Check


1. CHECK ORVR FUNCTION

Check whether the following symptoms are present.
- Fuel odor from EVAP canister is strong.
- Cannot refuel/Fuel odor from the fuel filler opening is strong while refueling.
Is any symptom present?
YES- Proceed to .
NO- INSPECTION END


Diagnosis Procedure


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 1.9 kg (4.2 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.
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.
- GO TO 5.

5. CHECK DRAIN FILTER

.
Is the inspection result normal?
OK- GO TO 6.
NO- Replace drain filter.

6. DETECT MALFUNCTIONING PART

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

7. CHECK REFUELING EVAP VAPOR CUT VALVE

.
Is the inspection result normal?
YES- INSPECTION END
NO- Replace refueling EVAP vapor cut valve with fuel tank.

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 1.9 kg (4.2 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.
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.
- GO TO 11.

11. CHECK DRAIN FILTER

.
Is the inspection result normal?
OK- GO TO 12.
NO- Replace drain filter.

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 VENT HOSES AND VENT TUBES

Check hoses and tubes between EVAP canister and refueling control valve for clogging, kink, looseness and improper connection.
Is the inspection result normal?
YES- GO TO 14.
NO- Repair or replace hoses and tubes.

14. CHECK RECIRCULATION LINE

Check recirculation line for clogging, dents and cracks.
Is the inspection result normal?
YES- GO TO 15.
NO- Replace fuel filler tube.

15. CHECK REFUELING EVAP VAPOR CUT VALVE

.
Is the inspection result normal?
YES- GO TO 16.
NO- Replace refueling EVAP vapor cut valve with fuel tank.

16. 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 17.
NO- Replace fuel filler tube.

17. CHECK ONE-WAY FUEL VALVE-I

Check one-way valve for clogging.
Is the inspection result normal?
YES- GO TO 18.
NO- Repair or replace one-way fuel valve with fuel tank.

18. 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 per the following.
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.


Component Inspection (Refueling EVAP vapor cut valve)


1. INSPECTION START

Do you have CONSULT?
Do you have CONSULT?
YES- GO TO 2.
NO- GO TO 3.

2. CHECK REFUELING EVAP VAPOR CUT VALVE

With CONSULT
1.Remove fuel tank. Removal And Installation.
2.Drain fuel from the tank as per the following:
-Remove fuel feed hose located on the fuel gauge retainer.
-Connect a spare fuel hose, one side to fuel gauge retainer where the hose was removed and the other side to a fuel container.
-Drain fuel using "FUEL PUMP RELAY" in "ACTIVE TEST" mode of "ENGINE" using CONSULT.
3.Check refueling EVAP vapor cut valve for being stuck to close as per the following.
Blow air into the refueling EVAP vapor cut valve (from the end of EVAP/ORVR line hose), and check that the air flows freely into the tank.
4.Check refueling EVAP vapor cut valve for being stuck to open as per the following.
-Connect vacuum pump to hose end.
-Remove fuel gauge retainer with fuel gauge unit.
Always replace O-ring with new one.
-Put fuel tank upside down.
-Apply vacuum pressure to hose end [13.3 kPa (-0.136 kg/cm3, 1.93 psi)] with fuel gauge retainer remaining open and check that the pressure is applicable.










Is the inspection result normal?
YES- INSPECTION END
NO- Replace refueling EVAP vapor cut valve with fuel tank. Exploded View.

3. CHECK REFUELING EVAP VAPOR CUT VALVE

Without CONSULT
1.Remove fuel tank. Exploded View.
2.Drain fuel from the tank as per the following:
-Remove fuel gauge retainer.
-Drain fuel from the tank using a handy pump into a fuel container.
3.Check refueling EVAP vapor cut valve for being stuck to close as per the following.
Blow air into the refueling EVAP vapor cut valve (from the end of EVAP/ORVR line hose), and check that the air flows freely into the tank.
4.Check refueling EVAP vapor cut valve for being stuck to open as per the following.
-Connect vacuum pump to hose end.
-Remove fuel gauge retainer with fuel gauge unit.
Always replace O-ring with new one.
-Put fuel tank upside down.
-Apply vacuum pressure to hose end [13.3 kPa (-0.136 kg/cm3, 1.93 psi)] with fuel gauge retainer remaining open and check that the pressure is applicable.










Is the inspection result normal?
YES- INSPECTION END
NO- Replace refueling EVAP vapor cut valve with fuel tank .Exploded View.


Component Inspection (Drain filter)


1. CHECK DRAIN FILTER

1.Check visually for insect nests in the drain filter air inlet.
2.Check visually for cracks or flaws in the appearance.
3.Check visually for cracks or flaws in the hose.





4.Blow air into port A and check that it flows freely out of port B.
5.Block port B.
6.Blow air into port A and check that there is no leakage.
Is the inspection result normal?
YES- INSPECTION END
NO- Replace drain filter.
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