Nissan Frontier D22. Manual - part 663

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-1755

[VG33ER]

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9. 

CHECK REFUELING EVAP VAPOR CUT VALVE

 With CONSULT-II

1.

Remove fuel tank. Refer to 

FL-3, "FUEL TANK"

 .

2.

Drain fuel from the tank as follows:

–

Remove fuel feed hose located on the fuel level sensor unit retainer.

–

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

–

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.

–

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

–

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

–

Put fuel tank upside down.

–

Apply vacuum pressure to both hose ends A and B [

−13.3 kPa (−100 mmHg, −3.94 inHg)] with fuel level

sensor unit retainer remaining open and check that the pressure is applicable.

OK or NG

OK

>> GO TO 11.

NG

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

SEF707Z

EC-1756

[VG33ER]

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

10. 

CHECK REFUELING EVAP VAPOR CUT VALVE

 Without CONSULT-II

1.

Remove fuel tank. Refer to 

FL-3, "FUEL TANK"

 .

2.

Drain fuel from the tank as follows:

–

Remove fuel level sensor unit retainer.

–

Drain fuel from the tank using a hand pump into a fuel container.

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.

–

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

–

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

–

Put fuel tank upside down.

–

Apply vacuum pressure to both hose ends A and B [

−13.3 kPa (−100 mmHg, −3.94 inHg)] with fuel level

sensor unit retainer remaining open and check that the pressure is applicable.

OK or NG

OK

>> GO TO 11.

NG

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

11. 

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 12.

NG

>> Replace fuel filler tube.

12. 

CHECK ONE-WAY FUEL VALVE-I

Check one-way valve for clogging.

OK or NG

OK

>>  GO TO 13.

NG

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

SEF707Z

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-1757

[VG33ER]

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13. 

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. 

SEF665U

EC-1758

[VG33ER]

POSITIVE CRANKCASE VENTILATION

POSITIVE CRANKCASE VENTILATION

PFP:11810

Description

UBS00E3C

The positive crankcase ventilation (PCV) valve is provided to con-
duct crankcase blow-by gas to the intake manifold.
During partial throttle operation of the engine, the intake manifold
sucks the blow-by gas through the PCV valve.
Normally, the capacity of the valve is sufficient to handle any blow-by
and a small amount of ventilating air.
The ventilating air is then drawn from the air inlet tubes into the
crankcase. In this process the air passes through the hose connect-
ing air inlet tubes to rocker cover.
Under full-throttle condition, the manifold vacuum is insufficient to
draw the blow-by flow through the valve. The flow goes through the
hose connection in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not
meet the requirement. This is because some of the flow will go
through the hose connection to the air inlet tubes under all condi-
tions.
This system returns blow-by gas to the intake manifold.

Component Inspection

UBS00E3D

PCV (POSITIVE CRANKCASE VENTILATION) VALVE

With engine running at idle, remove PCV valve from rocker cover; if
the valve is working properly, a hissing noise will be heard as air
passes through it and a strong vacuum should be felt immediately
when a finger is placed over valve inlet.

PCV VALVE VENTILATION HOSE

1.

Check hoses and hose connections for leaks.

2.

Disconnect all hoses and clean with compressed air. If any hose
cannot be freed of obstructions, replace.

SEC481D

SEC297C

SEC137A

S-ET277