Nissan Pathfinder (2012 year). Manual - part 292

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-417

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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. Refer to 

FL-16, "Removal and Installation"

.

>> GO TO 4.

4.

CHECK DRAIN FILTER

Refer to 

EC-419, "Component Inspection"

.

OK or NG

OK

>> GO TO 5.

NG

>> Replace drain filter. Refer to 

EC-57, "Description"

.

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-419, "Component Inspection"

.

OK or NG

OK

>>

INSPECTION END

NG

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

FL-6, "Removal and Installation"

.

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. Refer to 

FL-16, "Removal and Installation"

.

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

August 2012

2012 Pathfinder

EC-418

< DTC/CIRCUIT 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. Refer to 

FL-16, "Removal and Installation"

.

>> GO TO 4.

4.

CHECK DRAIN FILTER

Refer to 

EC-419, "Component Inspection"

.

OK or NG

OK

>> GO TO 5.

NG

>> Replace drain filter. Refer to 

EC-57, "Description"

.

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-419, "Component Inspection"

.

OK or NG

OK

>> GO TO 9.

NG

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

FL-6, "Removal and Installation"

.

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

August 2012

2012 Pathfinder

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-419

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NG

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

FL-6, "Removal and Installation"

.

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. Refer to 

FL-6, "Removal and Installation"

.

Component Inspection

INFOID:0000000007358380

REFUELING EVAP VAPOR CUT VALVE

 With CONSULT

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.
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

SEF665U

BBIA0568E

August 2012

2012 Pathfinder

EC-420

< DTC/CIRCUIT 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. Refer to 

EC-57, "Description"

.

BBIA0568E

PBIB3641E

August 2012

2012 Pathfinder

POSITIVE CRANKCASE VENTILATION

EC-421

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

POSITIVE CRANKCASE VENTILATION

Description

INFOID:0000000007358381

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:0000000007358382

PCV (POSITIVE CRANKCASE VENTILATION) VALVE

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

Refer to 

EM-43, "Exploded View"

. 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

August 2012

2012 Pathfinder

EC-422

< DTC/CIRCUIT 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. Refer to 

EM-43,

"Exploded View"

.

S-ET277

August 2012

2012 Pathfinder

REFRIGERANT PRESSURE SENSOR

EC-423

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

REFRIGERANT PRESSURE SENSOR

Component Description

INFOID:0000000007358383

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:0000000007358384

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 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-97, "Ground Inspection"

.

BBIA0564E

PBIB2657E

Voltage: 1.0 - 4.0V

PBIB1188E

BBIA0539E

August 2012

2012 Pathfinder

EC-424

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

REFRIGERANT PRESSURE SENSOR

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace ground connections.

3.

CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT

1. Disconnect refrigerant pressure sensor harness connector.

2. Turn ignition switch ON.

3. Check voltage between refrigerant pressure sensor terminal 3

and ground with CONSULT or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E5, F14

• Harness for open or short between ECM and refrigerant pressure sensor

>> Repair harness or connectors.

5.

CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between refrigerant pressure sensor terminal 1 and ECM terminal 67.

Refer to Wiring Diagram.

4. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E5, F14

• Harness for open or short between ECM and refrigerant pressure sensor

>> Repair open circuit or short to ground or short to power in harness or connectors.

7.

CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between ECM terminal 70 and refrigerant pressure sensor terminal 2.

Refer to Wiring Diagram.

BBIA0564E

Voltage: Approximately 5V

PBIB1872E

Continuity should exist.

August 2012

2012 Pathfinder