Nissan Pathfinder (2010 year). Manual - part 290

EC-412

< COMPONENT DIAGNOSIS >

[VQ40DE]

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

System Description

INFOID:0000000005257447

From the beginning of refueling, the air and vapor inside the fuel tank go through refueling EVAP vapor cut

valve and EVAP/ORVR line to the EVAP canister. The vapor is absorbed by the EVAP canister and the air is

released to the atmosphere.

When the refueling has reached the full level of the fuel tank, the refueling EVAP vapor cut valve is closed and

refueling is stopped because of auto shut-off. The vapor which was absorbed by the EVAP canister is purged

during driving.

WARNING:

When conducting inspections below, Always observe the following:

• Put a “CAUTION: FLAMMABLE” sign in workshop.

• Never smoke while servicing fuel system. Keep open flames and sparks away from work area.

• Always furnish the workshop with a CO

2

 fire extinguisher.

CAUTION:

• Before removing fuel line parts, carry out the following procedures:

- Put drained fuel in an explosion-proof container and put lid on securely.

- Release fuel pressure from fuel line. Refer to 

EC-495, "Fuel Pressure Check"

.

- Disconnect battery negative cable.

• Always replace O-ring when the fuel gauge retainer is removed.

• Never kink or twist hose and tube when they are installed.

• Never tighten hose and clamps excessively to avoid damaging hoses.

• After installation, run engine and check for fuel leaks at connections.

• Never attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically.

Continued refueling may cause fuel overflow, resulting in fuel spray and possibly a fire.

Diagnosis Procedure

INFOID:0000000005257448

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 2.0 kg (4.4 lb).

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

PBIB1068E

2010 Pathfinder

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-413

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2.

CHECK IF EVAP CANISTER IS 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 DRAIN FILTER

Refer to 

EC-415, "Component Inspection"

.

OK or NG

OK

>> GO TO 5.

NG

>> Replace drain filter.

5.

DETECT MALFUNCTIONING PART

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

>> Repair or replace EVAP hose.

6.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-415, "Component Inspection"

.

OK or NG

OK

>>

INSPECTION END

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 2.0 kg (4.4 lb).

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

2.

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

BBIA0558E

2010 Pathfinder

EC-414

< COMPONENT DIAGNOSIS >

[VQ40DE]

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

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 DRAIN FILTER

Refer to 

EC-415, "Component Inspection"

.

OK or NG

OK

>> GO TO 5.

NG

>> Replace drain filter.

5.

DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and vehicle frame 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, kinks, looseness and

improper connection.
OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace hoses and tubes.

7.

CHECK FILLER NECK TUBE

Check recirculation line for clogging, dents and cracks. 
OK or NG

OK

>> GO TO 8.

NG

>> Replace filler neck tube.

8.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-415, "Component Inspection"

.

OK or NG

OK

>> GO TO 9.

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

OK

>> GO TO 10.

NG

>> Replace fuel filler tube.

10.

CHECK ONE-WAY FUEL VALVE-I

Check one-way valve for clogging.
OK or NG

OK

>> GO TO 11.

BBIA0558E

2010 Pathfinder

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-415

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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.

OK or NG

OK

>>

INSPECTION END

NG

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

with fuel tank.

Component Inspection

INFOID:0000000005257449

REFUELING EVAP VAPOR CUT VALVE

 With CONSULT-III

1. Remove fuel tank. Refer to 

FL-6, "Removal and Installation"

.

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-III.
3. Check refueling EVAP vapor cut valve for being stuck to close as follows.

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 follows.
a. Connect vacuum pump to hose end.
b. Remove fuel gauge retainer with fuel gauge unit.

Always replace O-ring with new one.

c. Turn fuel tank upside down.
d. Apply vacuum pressure to hose end [

−

13.3 kPa (

−

100 mmHg, 

−

3.94 inHg)] with fuel gauge retainer

remaining open and check that the pressure is applicable.

 Without CONSULT-III

SEF665U

BBIA0568E

2010 Pathfinder

EC-416

< COMPONENT DIAGNOSIS >

[VQ40DE]

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

1. Remove fuel tank. Refer to 

FL-6, "Removal and Installation"

.

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.

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 follows.
a. Connect vacuum pump to hose end.
b. Remove fuel gauge retainer with fuel gauge unit.

Always replace O-ring with new one.

c.

Turn fuel tank upside down.

d. Apply vacuum pressure to hose end [

−

13.3 kPa (

−

100 mmHg, 

−

3.94 inHg)] with fuel gauge retainer

remaining open and check that the pressure is applicable.

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.
7. If NG, replace drain filter.

BBIA0568E

PBIB3641E

2010 Pathfinder

POSITIVE CRANKCASE VENTILATION

EC-417

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POSITIVE CRANKCASE VENTILATION

Description

INFOID:0000000005257450

SYSTEM DESCRIPTION

This system returns blow-by gas to the intake manifold.

The positive crankcase ventilation (PCV) valve is provided to conduct 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 venti-

lating air. The ventilating air is then drawn from the air inlet tubes into the crankcase. In this process the air

passes through the hose connecting 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 hoseconnection to the air inlet tubes under all condi-

tions.

Component Inspection

INFOID:0000000005257451

PCV (POSITIVE CRANKCASE VENTILATION) VALVE

With engine running at idle, remove PCV valve from rocker cover. A

properly working valve makes a hissing noise as air passes through

it. A strong vacuum should be felt immediately when a finger is

placed over valve inlet.

SEC921C

PBIB1588E

PBIB1589E

2010 Pathfinder

EC-418

< COMPONENT DIAGNOSIS >

[VQ40DE]

POSITIVE CRANKCASE VENTILATION

PCV VALVE VENTILATION HOSE

1. Check hoses and hose connections for leaks.
2. Disconnect all hoses and clean with compressed air. If any

hosecannot be freed of obstructions, replace.

S-ET277

2010 Pathfinder

REFRIGERANT PRESSURE SENSOR

EC-419

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REFRIGERANT PRESSURE SENSOR

Component Description

INFOID:0000000005257452

The refrigerant pressure sensor is installed at the condenser of the

air conditioner system. The sensor uses an electrostatic volume

pressure transducer to convert refrigerant pressure to voltage. The

voltage signal is sent to ECM, and ECM controls cooling fan system.

Diagnosis Procedure

INFOID:0000000005257453

1.

CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION

1. Start engine and warm it up to normal operating temperature.

2. Turn A/C switch and blower switch ON.

3. Check voltage between ECM terminal 70 and ground with CON-

SULT-III or tester.

OK or NG

OK

>>

INSPECTION END

NG

>> GO TO 2.

2.

CHECK GROUND CONNECTIONS

1. Turn A/C switch and blower switch OFF.

2. Turn ignition switch OFF.

3. Loosen and retighten three ground screws on the body. Refer to 

EC-100, "Ground Inspection"

.

BBIA0564E

PBIB2657E

Voltage: 1.0 - 4.0V

PBIB1188E

BBIA0539E

2010 Pathfinder