Nissan Pathfinder (2011 year). Manual - part 359

EC-926

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

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. Check that fuel is drained from the tank.

2. Remove fuel filler tube and hose.

3. Check one-way fuel valve for operation as per the following.

When a stick is inserted, the valve should open, when removing

stick it should close.

Never 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

.

Component Inspection

INFOID:0000000006244620

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 per the following:
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 per the following.

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 per the following.
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 (

−

0.136 kg/cm

2

, 

−

.93 psi)] with fuel gauge retainer

remaining open and check that the pressure is applicable.

 Without CONSULT-III

SEF665U

BBIA0568E

2011 Pathfinder

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-927

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1. Remove fuel tank. Refer to 

FL-6, "Removal and Installation"

.

2. Drain fuel from the tank as per the following:
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 per the following.

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 per the following.
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 (

−

0.136 kg/cm

2

, 

−

.93 psi)] 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-512

.

BBIA0568E

PBIB3641E

2011 Pathfinder

EC-928

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

POSITIVE CRANKCASE VENTILATION

POSITIVE CRANKCASE VENTILATION

Description

INFOID:0000000006244621

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 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 hose connection to the air inlet tubes under all condi-

tions.

Component Inspection

INFOID:0000000006244622

PCV (POSITIVE CRANKCASE VENTILATION) VALVE

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

Refer to 

EM-179

. 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.

PCV VALVE VENTILATION HOSE

PBIB0062E

PBIB1588E

PBIB1589E

2011 Pathfinder

POSITIVE CRANKCASE VENTILATION

EC-929

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

cannot be freed of obstructions, replace.

S-ET277

2011 Pathfinder

EC-930

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

REFRIGERANT PRESSURE SENSOR

REFRIGERANT PRESSURE SENSOR

Component Description

INFOID:0000000006244623

The refrigerant pressure sensor (1) 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:0000000006244624

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 fan 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 fan switch OFF.

2. Turn ignition switch OFF.

3. Loosen and retighten ground screws on the body.

ALBIA0357ZZ

PBIB2657E

Voltage: 1.0 - 4.0 V

PBIB1188E

2011 Pathfinder

REFRIGERANT PRESSURE SENSOR

EC-931

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[VK56DE]

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Refer to 

EC-612, "Ground Inspection"

.

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 (1) harness connector.

2. Turn ignition switch ON.

3. Check voltage between refrigerant pressure sensor terminal 1

and ground with CONSULT-III 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 3 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.

BBIA0539E

ALBIA0357ZZ

Voltage: Approximately 5 V

PBIB0188E

Continuity should exist.

2011 Pathfinder

EC-932

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

REFRIGERANT PRESSURE SENSOR

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.

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

OK

>> GO TO 9.

NG

>> GO TO 8.

8.

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.

9.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

OK or NG

OK

>> Replace refrigerant pressure sensor. Refer to 

HA-54

.

NG

>> Repair or replace malfunctioning part.

Continuity should exist.

2011 Pathfinder

ENGINE CONTROL SYSTEM SYMPTOMS

EC-933

< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

ENGINE CONTROL SYSTEM SYMPTOMS

Symptom Matrix Chart

INFOID:0000000006244633

SYSTEM — BASIC ENGINE CONTROL SYSTEM

SYMPTOM

Refer-
ence page

HARD/NO ST

AR

T

/REST

AR

T

 (EXCP

. 

H

A

)

ENGINE ST

ALL

HESIT

A

TION/SURGING/FLA

T

 SPOT

SP

ARK KNOCK/DET

O

NA

TION

LACK

 OF POWER/

POOR 

ACC

E

LERA

TION

HIGH IDL

E/LOW

 IDLE

ROUG

H IDLE/HUNTING

IDLI

NG VIBRA

TION

SLOW

/NO RETURN T

O

 IDLE

OVERHEA

T

S/W

A

TER TEMPERA

T

UR

E

 HIGH

EXCESS

IVE F

U

E

L CONSUMP

T

IO

N

EXCESS

IVE OIL CONSUMP

T

ION

BA

TTER

Y

 DEAD (UNDER CHARGE)

Warranty symptom code

AA

AB

AC

AD

AE

AF AG AH

AJ

AK

AL

AM HA

Fuel

Fuel  pump  circuit

1

1

2

3

2

2

2

3

2

EC-914

Fuel  pressure  regulator  system

3

3

4

4

4

4

4

4

4

4

EC-938

Fuel  injector  circuit

1

1

2

3

2

2

2

2

EC-911

Evaporative  emission  system

3

3

4

4

4

4

4

4

4

4

EC-512

Air

Positive crankcase ventilation sys-
tem

3

3

4

4

4

4

4

4

4

4

1

EC-928

Incorrect idle speed adjustment

1

1

1

1

1

EC-588

Electric  throttle  control  actuator

1

1

2

3

3

2

2

2

2

2

2

EC-871
EC-874
EC-878
EC-880

Ignition

Incorrect  ignition  timing  adjustment

3

3

1

1

1

1

1

1

EC-588

Ignition  circuit

1

1

2

2

2

2

2

2

EC-917

Main  power  supply  and  ground  circuit

2

2

3

3

3

3

3

2

3

EC-609

2011 Pathfinder