Infiniti Q45. Manual - part 350

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-39

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Diagnostic Procedure

NBS001QH

SYMPTOM: FUEL ODOR FROM EVAP CANISTER IS STRONG.

1. 

CHECK EVAP CANISTER

1.

Remove EVAP canister with EVAP canister vent control valve attached.

2.

Weigh the EVAP canister with EVAP canister vent control valve attached.
The weight should be less than 1.8 kg (4.0 lb).

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

2. 

CHECK IF EVAP CANISTER SATURATED WITH WATER

Does water drain from the EVAP canister?

Yes or No

Yes

>> GO TO 3.

No

>> GO TO 6.

3. 

REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 4.

4. 

CHECK WATER SEPARATOR

Refer to 

EC-41, "Component Inspection"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Replace water separator.

5. 

DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and water separator for clogging or poor connection.

>> Repair or replace EVAP hose.

6. 

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-41, "Component Inspection"

 .

OK or NG

OK

>> GO TO 7.

NG

>> Replace refueling EVAP vapor cut valve with fuel tank.

7. 

CHECK REFUELING CONTROL VALVE

Refer to 

EC-41, "Component Inspection"

 .

OK or NG

OK

>> INSPECTION END

NG

>> Replace refueling control valve with fuel tank.

SEF596U

EC-40

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

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 attached.

2.

Weigh the EVAP canister with EVAP canister vent control valve attached.
The weight should be less than 1.8 kg (4.0 lb).

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

2. 

CHECK IF EVAP CANISTER SATURATED WITH WATER

Does water drain from the EVAP canister?

Yes or No

Yes

>> GO TO 3.

No

>> GO TO 6.

3. 

REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 4.

4. 

CHECK WATER SEPARATOR

Refer to 

EC-41, "Component Inspection"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Replace water separator.

5. 

DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and water separator for clogging or poor connection.

>> Repair or replace EVAP hose.

6. 

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

OK

>> GO TO 7.

NG

>> Repair or replace hoses and tubes.

7. 

CHECK FILLER NECK TUBE

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

OK or NG

OK

>> GO TO 8.

NG

>> Replace filler neck tube.

SEF596U

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-41

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8. 

CHECK REFUELING CONTROL VALVE

Refer to 

EC-41, "Component Inspection"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Replace refueling control valve with fuel tank. 

9. 

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-41, "Component Inspection"

 .

OK or NG

OK

>> GO TO 10.

NG

>> Replace refueling EVAP vapor cut valve with fuel tank.

10. 

CHECK FUEL FILLER TUBE

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

OK or NG

OK

>> GO TO 11.

NG

>> Replace fuel filler tube.

11. 

CHECK ONE-WAY FUEL VALVE-I

Check one-way valve for clogging.

OK or NG

OK

>> GO TO 12.

NG

>> Repair or replace one-way fuel valve with fuel tank.

12. 

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.

OK or NG

OK

>> INSPECTION END

NG

>> Replace fuel filler tube or replace one-way fuel valve

with fuel tank.

Component Inspection

NBS001QI

WATER SEPARATOR

1.

Check visually for insect nests in the water separator air inlet.

2.

Check visually for cracks or flaws in the appearance.

3.

Check visually for cracks or flaws in the hose.

SEF665U

EC-42

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

4.

Check that A  and C  are not clogged by blowing air into B  with
A , and then C  plugged.

5.

In case of NG in items 2 - 4, replace the parts.

NOTE:

●

Do not disassemble water separator.

REFUELING EVAP VAPOR CUT VALVE

 With CONSULT-II

1.

Remove fuel tank. Refer to 

FL-8, "FUEL TANK"

 .

2.

Drain fuel from the tank as follows:

a.

Remove fuel feed hose located on the fuel gauge retainer.

b.

Connect a spare fuel hose, one side to fuel gauge retainer where the hose was removed and the other
side to a fuel container.

c.

Drain fuel using “FUEL PUMP RELAY” in “ACTIVE TEST” mode with CONSULT-II.

3.

Check refueling EVAP vapor cut valve for being stuck to close as follows.
Blow air into the refueling EVAP vapor cut valve (from hose end B), and check that the air flows freely into
the tank.

4.

Check EVAP vapor cut valve for being stuck to open as follows.

a.

Connect vacuum pump to hose ends A and B using a suitable 3-way connector.

b.

Remove fuel gauge retainer with fuel gauge unit.
Always replace O-ring with new one.

c.

Put fuel tank upside down.

d.

Apply vacuum pressure to both hose ends A and B [

−

13.3 kPa (

−

100 mmHg, 

−

3.94 inHg)] with fuel gauge

retainer remaining open and check that the pressure is applicable.

 Without CONSULT-II

1.

Remove fuel tank. Refer to 

FL-8, "FUEL TANK"

 .

2.

Drain fuel from the tank as follows:

a.

Remove fuel gauge retainer.

b.

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 follows.

PBIB1032E

PBIB1135E