Nissan Pathfinder (2009 year). Manual - part 367

EC-950

< PREPARATION >

[VK56DE]

PREPARATION

Fuel filler cap adapter
i.e.: (MLR-8382)

Checks fuel tank vacuum relief valve opening 
pressure

Socket wrench

Removes and installs engine coolant temperature 
sensor

Oxygen sensor thread 
cleaner
i.e.: (J-43897-18)
(J-43897-12)

Reconditions the exhaust system threads before 
installing a new oxygen sensor. Use with anti-
seize lubricant shown below.
a: 18 mm diameter with pitch 1.5 mm for Zirco-
nia Oxygen Sensor
b: 12 mm diameter with pitch 1.25 mm for Tita-
nia Oxygen Sensor

Anti-seize lubricant 

i.e.: (Permatex

TM

 

133AR or equivalent 
meeting MIL specifica-
tion MIL-A-907)

Lubricates oxygen sensor thread cleaning tool 
when reconditioning exhaust system threads.

Tool name
(Kent-Moore No.)

Description

S-NT815

S-NT705

AEM488

S-NT779

2009 Pathfinder

FUEL PRESSURE

EC-951

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ON-VEHICLE MAINTENANCE

FUEL PRESSURE

Fuel Pressure Check

INFOID:0000000003936882

FUEL PRESSURE RELEASE

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT” mode with CONSULT-III.

3.

Start engine.

4.

After engine stalls, crank it 2 or 3 times to release all fuel pressure.

5.

Turn ignition switch OFF.

 Without CONSULT-III

1.

Remove fuel pump fuse (1) located in IPDM E/R (2).

2.

Start engine.

3.

After engine stalls, crank it 2 or 3 times to release all fuel pres-
sure.

4.

Turn ignition switch OFF.

5.

Reinstall fuel pump fuse after servicing fuel system.

FUEL PRESSURE CHECK

CAUTION:

• Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
• Be careful not to scratch or get the fuel hose connection area dirty when servicing, so that the quick

connector o-ring maintains seal ability.

• Use Fuel Pressure Gauge Kit [SST (J-44321)] and Fuel Pressure Adapter [SST (J-44321-6)] to check

fuel pressure.

• Never perform fuel pressure check with electrical system operating (i.e. lights, rear window defog-

ger, A/C, etc.). Fuel pressure gauge may indicate false readings due to varying engine loads and
changes in manifold vacuum.

NOTE:
Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel pres-
sure cannot be completely released because R51 models do not have fuel return system.

1.

Release fuel pressure to zero. Refer to "FUEL PRESSURE RELEASE".

2.

Remove engine cover.

3.

Remove fuel hose using Quick Connector Release [SST (J-45488)]. Refer to 

EM-182, "Exploded View"

.

• Never twist or kink fuel hose because it is plastic hose.
• Never remove fuel hose from quick connector.
• Keep fuel hose connections clean.

4.

Install Fuel Pressure Adapter [SST (J-44321-6)] and Fuel Pres-
sure Gauge [SST (J-44321)] (1) as shown in the figure.
• Never distort or bend fuel rail tube when installing fuel pres-

sure gauge adapter.

• When reconnecting fuel hose, check the original fuel hose for

damage and abnormality.

5.

Turn ignition switch ON (reactivate fuel pump), and check for
fuel leakage.

6.

Start engine and check for fuel leakage.

7.

Read the indication of fuel pressure gauge.

ALBIA0351ZZ

ALBIA0367ZZ

2009 Pathfinder

EC-952

< ON-VEHICLE MAINTENANCE >

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FUEL PRESSURE

• During fuel pressure check, check for fuel leakage from fuel connection every 3 minutes.

8.

If result is unsatisfactory, go to next step.

9.

Check the following.
• Fuel hoses and fuel tubes for clogging
• Fuel filter for clogging
• Fuel pump
• Fuel pressure regulator for clogging
If OK, replace fuel pressure regulator.
If NG, repair or replace malfunctioning part.

10. Before disconnecting Fuel Pressure Gauge and Fuel Pressure Adapter [SST (J-44321-6)], release fuel

pressure to zero. Refer to "FUEL PRESSURE RELEASE".

At idling:

Approximately 350 kPa (3.57 kg/cm

2

, 51 psi)

2009 Pathfinder

EVAP LEAK CHECK

EC-953

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EVAP LEAK CHECK

How to Detect EVAP Leakage

INFOID:0000000003936883

CAUTION:

• Never use compressed air or a high pressure pump.
• Never exceed 4.12 kPa (0.042 kg/cm

2

, 0.6 psi) of pressure in EVAP system.

NOTE:
• Never start engine.
• Improper installation of EVAP service port adapter (commercial service tool) to the EVAP service port may

cause a leak.

 WITH CONSULT-III

1.

Attach the EVAP service port adapter (commercial service tool)
securely to the EVAP service port.

-

EVAP canister purge volume control solenoid valve (1)

-

: Vehicle front

2.

Also attach the pressure pump and hose to the EVAP service
port adapter (commercial service tool).

3.

Turn ignition switch ON.

4.

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

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 (commercial service tool)
and hose with pressure pump.

8.

Locate the leak using a leak detector (commercial service tool).
Refer to 

EC-520, "Description"

.

 WITHOUT CONSULT-III

ALBIA0349ZZ

SEF462UA

SEF200U

2009 Pathfinder

EC-954

< ON-VEHICLE MAINTENANCE >

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EVAP LEAK CHECK

1.

Attach the EVAP service port adapter (commercial service tool)
securely to the EVAP service port (2).

-

EVAP canister purge volume control solenoid valve (1)

-

: Vehicle front

2.

Also attach the pressure pump with pressure gauge to the EVAP
service port adapter (commercial service tool).

3.

Apply battery voltage between the terminals of EVAP canister
vent control valve (3) to make a closed EVAP system.

-

Fuel filler pipe (top of frame view) (1)

-

EVAP control system pressure sensor (2)

-

EVAP canister (4)

-

Drain filter (5)

-

: Vehicle front

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 (commercial service tool)
and hose with pressure pump.

6.

Locate the leak using a leak detector (commercial service tool). Refer to 

EC-520, "Description"

.

ALBIA0349ZZ

SEF462UA

AWBIA0134ZZ

2009 Pathfinder

EVAP CANISTER

EC-955

< ON-VEHICLE REPAIR >

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ON-VEHICLE REPAIR

EVAP CANISTER

Component Inspection

INFOID:0000000003936884

EVAP CANISTER

Check EVAP canister as per the following:

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.

Removal and Installation

INFOID:0000000003936885

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.

PBIB2568E

 : N-·m (kg-m, in-lb)

BBIA0566E

BBIA0567E

2009 Pathfinder

EC-956

< SERVICE DATA AND SPECIFICATIONS (SDS) 

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SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Fuel Pressure

INFOID:0000000003936886

Idle Speed and Ignition Timing

INFOID:0000000003936887

*: Under the following conditions:

• Air conditioner switch: OFF

• Electric load: OFF (Lights, rear window defogger and heater fan)

• Steering wheel: Kept in straight-ahead position

Calculated Load Value

INFOID:0000000003936888

Mass Air Flow Sensor

INFOID:0000000003936889

*: Engine is warmed up to normal operating temperature and running under no load.

Intake Air Temperature Sensor

INFOID:0000000003936890

Engine Coolant Temperature Sensor

INFOID:0000000003936891

A/F Sensor 1 Heater

INFOID:0000000003936892

Fuel pressure at idling kPa (kg/cm

2

, psi)

Approximately 350 (3.57, 51)

Target idle speed

No-load* (in the P or N position)

650 

±

 50 rpm

Air conditioner: ON

In the P or N position

700 rpm or more

Ignition timing

In the P or N position

15

°

 

±

 5

°

BTDC

Condition

Calculated load value (%) (Using CONSULT-III or GST)

At idle

14.0 - 33.0

At 2,500 rpm

12.0 - 25.0

Supply voltage

Battery voltage (11 - 14 V)

Output voltage at idle

1.0 - 1.3 V*

Mass air flow (Using CONSULT-III or GST)

3.0 - 9.0 g·m/sec at idle*

9.0 - 28.0 g·m/sec at 2,500 rpm*

Temperature [

°

C (

°

F)]

Resistance (k

Ω

)

25 (77)

1.800 - 2.200

Temperature [

°

C (

°

F)]

Resistance (k

Ω

)

20 (68) 

2.1 - 2.9

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

Resistance [at 25

°

C (77

°

F)]

1.98 - 2.66 

Ω

2009 Pathfinder

SERVICE DATA AND SPECIFICATIONS (SDS)

EC-957

< SERVICE DATA AND SPECIFICATIONS (SDS) 

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Heated Oxygen sensor 2 Heater

INFOID:0000000003936893

Crankshaft Position Sensor (POS)

INFOID:0000000003936894

Refer to 

EC-689, "Component Inspection"

.

Camshaft Position Sensor (PHASE)

INFOID:0000000003936895

Refer to 

EC-693, "Component Inspection"

.

Throttle Control Motor

INFOID:0000000003936896

Fuel Injector

INFOID:0000000003936897

Fuel Pump

INFOID:0000000003936898

Resistance [at 25

°

C (77

°

F)]

8 - 10 

Ω

Resistance [at 25

°

C (77

°

F)]

Approximately 1 - 15 

Ω

Resistance [at 10 - 60

°

C (50 - 140

°

F)]

11.1 - 14.5 

Ω

Resistance [at 25

°

C (77

°

F)]

0.2 - 5.0 

Ω

2009 Pathfinder