Nissan Pathfinder (2006 year). Manual - part 147

EVAPORATIVE EMISSION SYSTEM

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EC

2006 Pathfinder

Component Inspection

UBS00K3H

EVAP CANISTER

Check EVAP canister as follows:

1.

Block port B .

2.

Blow air into port A   and check that it flows freely out of port C .

3.

Release blocked port B .

4.

Apply vacuum pressure to port B   and check that vacuum pres-
sure exists at the ports A   and C .

5.

Block port A   and B .

6.

Apply pressure to port C   and check that there is no leakage.

FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FULLER CAP)

1.

Wipe clean valve housing.

2.

Check valve opening pressure and vacuum.

3.

If out of specification, replace fuel filler cap as an assembly.

CAUTION:

Use only a genuine fuel filler cap as a replacement. If an incor-
rect fuel filler cap is used, the MIL may come on.

EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-407, "Component Inspection"

 .

FUEL TANK TEMPERATURE SENSOR

Refer to 

EC-333, "Component Inspection"

 .

EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-414, "Component Inspection"

 .

EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-430, "Component Inspection"

 .

PBIB2568E

SEF445Y

Pressure:

15.3 - 20.0 kPa (0.156 - 0.204 kg/cm

2

 , 2.22 

- 2.90 psi)

Vacuum:

−

6.0 to 

−

3.3 kPa (

−

0.061 to 

−

0.034 kg/cm

2

 , 

−

0.87 to 

−

0.48 psi)

SEF943S

EC-36

EVAPORATIVE EMISSION SYSTEM

2006 Pathfinder

EVAP SERVICE PORT

Positive pressure is delivered to the EVAP system through the EVAP
service port. If fuel vapor leakage in the EVAP system occurs, use a
leak detector to locate the leak.

Removal and Installation

UBS00K3I

EVAP CANISTER

Tighten EVAP canister as shown in the figure.

EVAP CANISTER VENT CONTROL VALVE

1.

Turn EVAP canister vent control valve counterclockwise.

2.

Remove the EVAP canister vent control valve.

Always replace O-ring with a new one.

How to Detect Fuel Vapor Leakage

UBS00K3J

CAUTION:

●

Never use compressed air or a high pressure pump.

●

Do not exceed 4.12 kPa (0.042 kg/cm

2

 , 0.6 psi) of pressure in EVAP system.

NOTE:

●

Do not start engine.

●

Improper installation of EVAP service port adapter to the EVAP service port may cause a leak.

SEF462UA

BBIA0566E

BBIA0567E

EVAPORATIVE EMISSION SYSTEM

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2006 Pathfinder

 WITH CONSULT-II

1.

Attach the EVAP service port adapter securely to the EVAP service port.

2.

Also attach the pressure pump and hose to the EVAP service port adapter.

3.

Turn ignition switch ON.

4.

Select the “EVAP SYSTEM CLOSE” of “WORK SUPPORT
MODE” with CONSULT-II.

5.

Touch “START”. A bar graph (Pressure indicating display) will
appear on the screen.

6.

Apply positive pressure to the EVAP system until the pressure
indicator reaches the middle of the bar graph.

7.

Remove EVAP service port adapter and hose with pressure
pump.

8.

Locate the leak using a leak detector. Refer to 

EC-33, "EVAPO-

RATIVE EMISSION LINE DRAWING"

 .

 WITHOUT CONSULT-II

1.

Attach the EVAP service port adapter securely to the EVAP ser-
vice port.

2.

Also attach the pressure pump with pressure gauge to the EVAP
service port adapter.

PEF838U

PEF917U

SEF200U

SEF462UA

EC-38

EVAPORATIVE EMISSION SYSTEM

2006 Pathfinder

3.

Apply battery voltage between the terminals of EVAP canister
vent control valve to make a closed EVAP system.

4.

To locate the leak, deliver positive pressure to the EVAP system
until pressure gauge points reach 1.38 to 2.76 kPa (0.014 to
0.028 kg/cm

2

 , 0.2 to 0.4 psi).

5.

Remove EVAP service port adapter and hose with pressure
pump.

6.

Locate the leak using a leak detector. Refer to 

EC-33, "EVAPO-

RATIVE EMISSION LINE DRAWING"

 .

BBIA0551E

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

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2006 Pathfinder

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

PFP:00032

System Description

UBS00K3K

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, be sure to observe the following:

●

Put a “CAUTION: INFLAMMABLE” sign in workshop.

●

Do not smoke while servicing fuel system. Keep open flames and sparks away from work area.

●

Be sure to 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-79, "FUEL PRESSURE RELEASE"

 .

–

Disconnect battery negative cable.

●

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

●

Do not kink or twist hose and tube when they are installed.

●

Do not tighten hose and clamps excessively to avoid damaging hoses.

●

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

●

Do not 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.

PBIB1068E

EC-40

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

2006 Pathfinder

Diagnostic Procedure

UBS00K3L

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.

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 5.

3. 

REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

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

>> Repair or replace EVAP hose.

5. 

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-42, "Component Inspection"

 .

OK or NG

OK

>> INSPECTION END

NG

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

BBIA0558E

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

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2006 Pathfinder

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 SATURATED WITH WATER

Does water drain from the EVAP canister?

Yes or No

Yes

>> GO TO 3.

No

>> GO TO 5.

3. 

REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

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

>> Repair or replace EVAP hose.

5. 

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 6.

NG

>> Repair or replace hoses and tubes.

6. 

CHECK FILLER NECK TUBE

Check recirculation line for clogging, dents and cracks. 

OK or NG

OK

>> GO TO 7.

NG

>> Replace filler neck tube.

BBIA0558E

EC-42

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

2006 Pathfinder

7. 

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-42, "Component Inspection"

 .

OK or NG

OK

>> GO TO 8.

NG

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

8. 

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 9.

NG

>> Replace fuel filler tube.

9. 

CHECK ONE-WAY FUEL VALVE-I

Check one-way valve for clogging.
OK or NG

OK

>> GO TO 10.

NG

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

10. 

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

UBS00K3M

REFUELING EVAP VAPOR CUT VALVE

 With CONSULT-II

1.

Remove fuel tank. Refer to 

FL-11, "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 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.

Put fuel tank upside down.

SEF665U