Nissan Pathfinder (2009 year). Manual — part 342

EC-750

< COMPONENT DIAGNOSIS >

[VK56DE]

P0456 EVAP CONTROL SYSTEM

Check for air releasing sound while opening the fuel filler cap.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

CHECK FUEL TANK VACUUM RELIEF VALVE

Refer to

EC-520, "Description"

.

OK or NG

OK

>> GO TO 5.

NG

>> Replace fuel filler cap with a genuine one.

5.

INSTALL THE PRESSURE PUMP

To locate the EVAP leak, install EVAP service port adapter (commer-
cial service tool) and pressure pump to EVAP service port (2)
securely.
NOTE:
Improper installation of the EVAP service port adapter (com-
mercial service tool) to the EVAP service port may cause leak-
ing.
• EVAP canister purge volume control solenoid valve (1)
•

: Vehicle front

With CONSULT-III>>GO TO 6.
Without CONSULT-III>>GO TO 7.

6.

CHECK FOR EVAP LEAK

With CONSULT-III

1.

Turn ignition switch ON.

2.

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

3.

Touch “START” and apply pressure into the EVAP line until the pressure indicator reaches the middle of
the bar graph.

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 the system.

ALBIA0349ZZ

SEF916U

2009 Pathfinder

P0456 EVAP CONTROL SYSTEM

EC-751

< COMPONENT DIAGNOSIS >

[VK56DE]

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4.

Using EVAP leak detector (commercial service tool), locate the
EVAP leak. For the leak detector (commercial service tool), refer
to the instruction manual for more details.

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace malfunctioning part.

7.

CHECK FOR EVAP LEAK

Without CONSULT-III

1.

Turn ignition switch OFF.

2.

Apply 12 volts DC to EVAP canister vent control valve (3). The
valve will close. (Continue to apply 12 volts until the end of test.)

-

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

-

EVAP control system pressure sensor (2)

-

EVAP canister (4)

-

Drain filter (5)

-

: Vehicle front

3.

Pressurize the EVAP line using pressure pump with 1.38 to 2.76
kPa (0.014 to 0.028 kg/cm

2

, 0.2 to 0.4 psi), then remove pump

and EVAP service port adapter (commercial service tool).

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 the system.

4.

Using EVAP leak detector (commercial service tool), locate the
EVAP leak. For the leak detector (commercial service tool), refer
to the instruction manual for more details.

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace malfunctioning part.

8.

CHECK DRAIN FILTER

Refer to

EC-754, "Component Inspection"

.

OK or NG

OK

>> GO TO 9.

NG

>> Replace drain filter.

9.

CHECK EVAP CANISTER VENT CONTROL VALVE

Check the following.
• EVAP canister vent control valve is installed properly.

Refer to

EC-955, "Removal and Installation"

.

• EVAP canister vent control valve.

Refer to

EC-721, "Component Inspection"

.

OK or NG

OK

>> GO TO 10.

NG

>> Repair or replace EVAP canister vent control valve and O-ring.

10.

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

1.

Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.

SEF200U

AWBIA0134ZZ

SEF200U

2009 Pathfinder

EC-752

< COMPONENT DIAGNOSIS >

[VK56DE]

P0456 EVAP CONTROL SYSTEM

2.

Does water drain from the EVAP canister?

Yes or No

Yes

>> GO TO 11.

No (With CONSULT-III)>>GO TO 13.
No (Without CONSULT-III)>>GO TO 14.

11.

CHECK EVAP CANISTER

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.

OK or NG

OK (With CONSULT-III)>>GO TO 13.
OK (Without CONSULT-III)>>GO TO 14.
NG

>> GO TO 12.

12.

DETECT MALFUNCTIONING PART

Check the following.
• EVAP canister for damage
• EVAP hose between EVAP canister and drain filter for clogging or poor connection

>> Repair hose or replace EVAP canister.

13.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT-III

1.

Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve and EVAP
service port from EVAP service port.

2.

Start engine.

3.

Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode.

4.

Touch “Qu” on CONSULT-III screen to increase “PURG VOL C/V” opening to 100%.

5.

Check vacuum hose for vacuum when revving engine up to 2,000 rpm.

OK or NG

OK

>> GO TO 16.

NG

>> GO TO 15.

14.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

Without CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Stop engine.

3.

Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve and EVAP
service port from EVAP service port.

4.

Start engine and let it idle for at least 80 seconds.

5.

Check vacuum hose for vacuum when revving engine up to 2,000 rpm.

OK or NG

OK

>> GO TO 17.

NG

>> GO TO 15.

BBIA0558E

SWB models:

The weight should be less than 2.5 kg (5.5 lb).

LWB models:

The weight should be less than 3.2 kg (7.1 lb).

Vacuum should exist.

Vacuum should exist.

2009 Pathfinder

P0456 EVAP CONTROL SYSTEM

EC-753

< COMPONENT DIAGNOSIS >

[VK56DE]

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15.

CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. Refer to

EC-520, "Description"

.

OK or NG

OK

>> GO TO 16.

NG

>> Repair or reconnect the hose.

16.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to

EC-718, "Component Inspection"

.

OK or NG

OK

>> GO TO 17.

NG

>> Replace EVAP canister purge volume control solenoid valve.

17.

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to

EC-672, "Component Inspection"

.

OK or NG

OK

>> GO TO 18.

NG

>> Replace “fuel level sensor unit and fuel pump”.

18.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to

EC-730, "Component Inspection"

.

OK or NG

OK

>> GO TO 19.

NG

>> Replace EVAP control system pressure sensor.

19.

CHECK EVAP PURGE LINE

Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection.
Refer to

EC-520, "Description"

.

OK or NG

OK

>> GO TO 20.

NG

>> Repair or reconnect the hose.

20.

CLEAN EVAP PURGE LINE

Clean EVAP purge line (pipe and rubber tube) using air blower.

>> GO TO 21.

21.

CHECK EVAP/ORVR LINE

Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper
connection. For location, refer to

EC-877, "System Description"

.

OK or NG

OK

>> GO TO 22.

NG

>> Repair or replace hoses and tubes.

22.

CHECK RECIRCULATION LINE

Check recirculation line between filler neck tube and fuel tank for clogging, kinks, cracks, looseness and
improper connection.

OK or NG

OK

>> GO TO 23.

NG

>> Repair or replace hose, tube or filler neck tube.

23.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to

EC-880, "Component Inspection"

.

OK or NG

OK

>> GO TO 24.

NG

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

2009 Pathfinder

EC-754

< COMPONENT DIAGNOSIS >

[VK56DE]

P0456 EVAP CONTROL SYSTEM

24.

CHECK FUEL LEVEL SENSOR

Refer to

EC-759, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 25.

NG

>> Replace “fuel level sensor unit and fuel pump”.

25.

CHECK INTERMITTENT INCIDENT

Refer to

GI-49, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000004333371

FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER 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 illuminate.

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.

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

PBIB3641E

2009 Pathfinder

P0460 FUEL LEVEL SENSOR

EC-755

< COMPONENT DIAGNOSIS >

[VK56DE]

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P0460 FUEL LEVEL SENSOR

Component Description

INFOID:0000000003936684

The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the combination meter. The combination meter sends the fuel level
sensor signal to the ECM via the CAN communication line.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.

On Board Diagnosis Logic

INFOID:0000000003936685

NOTE:
• If DTC P0460 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
• If DTC P0460 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer

to

EC-774, "DTC Confirmation Procedure"

.

When the vehicle is parked, the fuel level in the fuel tank is naturally stable. It means that output signal of the
fuel level sensor does not change. If ECM senses sloshing signal from the sensor, fuel level sensor malfunc-
tion is detected.

DTC Confirmation Procedure

INFOID:0000000003936686

1.

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next step.

a.

Turn ignition switch OFF and wait at least 10 seconds.

b.

Turn ignition switch ON.

c.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Start engine and wait maximum of 2 consecutive minutes.

3.

Check 1st trip DTC.

4.

If 1st trip DTC is detected, go to

EC-755, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003936687

1.

CHECK COMBINATION METER FUNCTION

Refer to

MWI-3, "Work Flow"

.

OK or NG

OK

>> GO TO 2.

NG

>> Go to

MWI-32, "Component Function Check"

.

2.

CHECK INTERMITTENT INCIDENT

Refer to

GI-49, "Intermittent Incident"

.

BBIA0529E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0460
0460

Fuel level sensor circuit
noise

Even though the vehicle is parked, a signal
being varied is sent from the fuel level sensor
to ECM.

• Harness or connectors

(The CAN communication line is open or
shorted)

• Harness or connectors

(The sensor circuit is open or shorted)

• Combination meter
• Fuel level sensor

2009 Pathfinder

EC-756

< COMPONENT DIAGNOSIS >

[VK56DE]

P0460 FUEL LEVEL SENSOR

>> INSPECTION END

2009 Pathfinder

P0461 FUEL LEVEL SENSOR

EC-757

< COMPONENT DIAGNOSIS >

[VK56DE]

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P0461 FUEL LEVEL SENSOR

Component Description

INFOID:0000000004333372

The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the combination meter. The combination meter sends the fuel level
sensor signal to the ECM via the CAN communication line.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.

On Board Diagnosis Logic

INFOID:0000000003936689

NOTE:
• If DTC P0461 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
• If DTC P0461 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer

to

EC-774, "DTC Confirmation Procedure"

.

Driving long distances naturally affect fuel gauge level.
This diagnosis detects the fuel gauge malfunction of the gauge not moving even after a long distance has
been driven.

Overall Function Check

INFOID:0000000003936690

Use this procedure to check the overall function of the fuel level sensor. During this check, a 1st trip DTC
might not be confirmed.

WARNING:

When performing the following procedure, always observe the handling of the fuel. Refer to

FL-11,

"Removal and Installation"

.

TESTING CONDITION:
Before starting overall function check, preparation of draining fuel and refilling fuel is required.

WITH CONSULT-III

NOTE:
Start from step 10, if it is possible to confirm that the fuel cannot be drained by 30 (7-7/8 US gal, 6-5/
8 Imp gal) in advance.
1.

Prepare a fuel container and a spare hose.

2.

Release fuel pressure from fuel line, refer to

EC-951, "Fuel Pressure Check"

.

3.

Remove the fuel feed hose on the fuel level sensor unit.

4.

Connect a spare fuel hose where the fuel feed hose was removed.

5.

Turn ignition switch OFF and wait at least 10 seconds then turn ON.

6.

Select “FUEL LEVEL SE” in “DATA MONITOR” mode with CONSULT-III.

7.

Check “FUEL LEVEL SE” output voltage and note it.

8.

Select “FUEL PUMP” in “ACTIVE TEST” mode with CONSULT-III.

9.

Touch “ON” and drain fuel approximately 30 (7-7/8 US gal, 6-5/8 Imp gal) and stop it.

10. Check “FUEL LEVEL SE” output voltage and note it.
11. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).
12. Check “FUEL LEVEL SE” output voltage and note it.

BBIA0529E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0461
0461

Fuel level sensor circuit
range/performance

The output signal of the fuel level sensor
does not change within the specified range
even though the vehicle has been driven a
long distance.

• Harness or connectors

(The CAN communication line is open or
shorted)

• Harness or connectors

(The sensor circuit is open or shorted)

• Combination meter
• Fuel level sensor

2009 Pathfinder