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Nissan Pathfinder (2010 year). Manual - part 273

EC-276

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0455 EVAP CONTROL SYSTEM

4. Using EVAP leak detector, locate the EVAP leak. For the leak

detector, refer to the instruction manual for more details. Refer

EC-45, "Description"

OK or NG

>> GO TO 12.

>> Repair or replace.

11.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT-III

1. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at 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 CONT/V” opening to 100%.

5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
OK or NG

>> GO TO 14.

>> GO TO 13.

12.

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 to EVAP canister purge volume control solenoid valve at 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

>> GO TO 15.

>> GO TO 13.

13.

CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. Refer to

EC-45, "Description"

OK or NG

OK (With CONSULT-III)>>GO TO 14.

OK (Without CONSULT-III)>>GO TO 15.

>> Repair or reconnect the hose.

14.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-III

1. Start engine.

2. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-III. Check that engine speed var-

ies according to the valve opening.

OK or NG

>> GO TO 16.

>> GO TO 15.

15.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to

EC-250, "Component Inspection"

OK or NG

>> GO TO 16.

>> Replace EVAP canister purge volume control solenoid valve.

SEF200U

Vacuum should exist.

2010 Pathfinder

P0455 EVAP CONTROL SYSTEM

EC-277

< COMPONENT DIAGNOSIS >

[VQ40DE]

16.

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to

EC-200, "Component Inspection"

OK or NG

>> GO TO 17.

>> Replace fuel level sensor unit.

17.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to

EC-266, "Component Inspection"

OK or NG

>> GO TO 18.

>> Replace EVAP control system pressure sensor.

18.

CHECK EVAP/ORVR LINE

Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kink, looseness and improper con-

nection. For location, refer to

EC-412, "System Description"

OK or NG

>> GO TO 19.

>> Repair or replace hoses and tubes.

19.

CHECK RECIRCULATION LINE

Check recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, looseness and

improper connection.
OK or NG

>> GO TO 20.

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

20.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to

EC-415, "Component Inspection"

OK or NG

>> GO TO 21.

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

21.

CHECK INTERMITTENT INCIDENT

Refer to

GI-37, "Intermittent Incident"

INSPECTION END

Component Inspection

INFOID:0000000005257258

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

1. Wipe clean valve housing.

SEF445Y

2010 Pathfinder

EC-278

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0455 EVAP CONTROL SYSTEM

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.

Pressure: 15.3 - 20.0 kPa (0.156 - 0.204 kg/cm

, 2.22 -

2.90 psi)

Vacuum:

−

6.0 to

−

3.3 kPa (

−

0.061 to

−

0.034 kg/cm

−

0.87 to

−

0.48 psi)

SEF943S

2010 Pathfinder

P0456 EVAP CONTROL SYSTEM

EC-279

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0456 EVAP CONTROL SYSTEM

On Board Diagnosis Logic

INFOID:0000000005257259

This diagnosis detects very small leaks in the EVAP line between fuel tank and EVAP canister purge volume

control solenoid valve, using the negative pressure.

If ECM judges a leak which corresponds to a very small leak, the very small leak P0456 will be detected.

If ECM judges a leak equivalent to a small leak, EVAP small leak P0442 will be detected.

If ECM judges that there are no leaks, the diagnosis will be OK.

CAUTION:

• Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the

MIL may illuminate.

• If the fuel filler cap is not tightened properly, the MIL may illuminate.

• Use only a genuine NISSAN rubber tube as a replacement.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0456
0456

Evaporative emission
control system very
small leak (negative
pressure check)

• EVAP system has a very small leak.
• EVAP system does not operate prop-

erly.

• Incorrect fuel tank vacuum relief valve
• Incorrect fuel filler cap used
• Fuel filler cap remains open or fails to close.
• Foreign matter caught in fuel filler cap.
• Leak is in line between intake manifold and EVAP

canister purge volume control solenoid valve.

• Foreign matter caught in EVAP canister vent con-

trol valve.

• EVAP canister or fuel tank leaks
• EVAP purge line (pipe and rubber tube) leaks
• EVAP purge line rubber tube bent
• Loose or disconnected rubber tube
• EVAP canister vent control valve and the circuit
• EVAP canister purge volume control solenoid

valve and the circuit

• Fuel tank temperature sensor
• O-ring of EVAP canister vent control valve is miss-

ing or damaged

• EVAP canister is saturated with water
• EVAP control system pressure sensor
• Refueling EVAP vapor cut valve
• ORVR system leaks
• Fuel level sensor and the circuit
• Foreign matter caught in EVAP canister purge vol-

ume control solenoid valve

PBIB3640E

2010 Pathfinder

EC-280

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0456 EVAP CONTROL SYSTEM

DTC Confirmation Procedure

INFOID:0000000005257260

NOTE:

•

If DTC P0456 is displayed with P0442, first perform trouble diagnosis for DTC P0456.

•

After repair, make sure that the hoses and clips are installed properly.

• If DTC Confirmation Procedure has been previously conducted, always perform the following before con-

ducting the next step.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

•

Open engine hood before conducting the following procedure.

•

If any of following conditions are met just before the DTC confirmation procedure, leave the vehicle

for more than 1 hour.

Fuel filler cap is removed.

Fuel is refilled or drained.

EVAP component part/parts is/are removed.

•

Before performing the following procedure, confirm that battery voltage is more than 11V at idle.

WITH CONSULT-III

1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.

2. Check that the following conditions are met.

FUEL LEVEL SE: 0.25 - 1.4V

COOLAN TEMP/S: 0 - 32

C (32 - 90

FUEL T/TMP SE: 0 - 35

C (32 - 95

INT A/TEMP SE: More than 0

C (32

If NG, turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle), or refill/drain fuel

until the output voltage of the “FUEL LEVEL SE” meets within the range above and leave the vehicle for

more than 1 hour. Then start from step 1.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Select “EVP V/S LEAK P0456/P1456” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode

with CONSULT-III.

Follow the instructions displayed.

6. Check that “OK” is displayed.

If “NG” is displayed, refer to

EC-281, "Diagnosis Procedure"

NOTE:

•

If the engine speed cannot be maintained within the range displayed on CONSULT-III screen, go

EC-20, "Basic Inspection"

•

Check that EVAP hoses are connected to EVAP canister purge volume control solenoid valve

properly.

Overall Function Check

INFOID:0000000005257261

WITH GST

Use this procedure to check the overall function of the EVAP very small leak function. During this check, a 1st

trip DTC might not be confirmed.

CAUTION:

• Never use compressed air, doing so may damage the EVAP system.

• Never start engine.
• Never exceeded 4.12 kPa (0.042 kg/cm

, 0.6 psi).

2010 Pathfinder

P0456 EVAP CONTROL SYSTEM

EC-281

< COMPONENT DIAGNOSIS >

[VQ40DE]

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

vice port.

2. Set the pressure pump and a hose.

3. Also set a vacuum gauge via 3-way connector and a hose.

4. Turn ignition switch ON.

5. Connect GST and select Service $08.

6. Using Service $08 control the EVAP canister vent control valve

(close).

7. Apply pressure and make sure the following conditions are sat-

isfied.

Pressure to be applied: 2.7 kPa (0.028 kg/cm

, 0.39 psi)

Time to be waited after the pressure drawn in to the EVAP

system and the pressure to be dropped: 60 seconds and

the pressure should not be dropped more than 0.4 kPa
(0.004 kg/cm

, 0.06 psi).

If NG, go to

EC-281, "Diagnosis Procedure"

If OK, go to next step.

8. Disconnect GST.

9. Start engine and warm it up to normal operating temperature.

10. Turn ignition switch OFF and wait at least 10 seconds.

11. Turn ignition switch ON.

12. Turn ignition switch OFF and wait at least 10 seconds.

13. Restart engine and let it idle for 90 seconds.

14. Keep engine speed at 2,000 rpm for 30 seconds.

15. Turn ignition switch OFF.

NOTE:

For more information, refer to GST instruction manual.

Diagnosis Procedure

INFOID:0000000005257262

CHECK FUEL FILLER CAP DESIGN

1. Turn ignition switch OFF.

2. Check for genuine NISSAN fuel filler cap design.
OK or NG

>> GO TO 2.

>> Replace with genuine NISSAN fuel filler cap.

CHECK FUEL FILLER CAP INSTALLATION

Check that the cap is tightened properly by rotating the cap clockwise.
OK or NG

>> GO TO 3.

>> 1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.

BBIA0550E

SEF462UI

SEF915U

2010 Pathfinder

EC-282

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0456 EVAP CONTROL SYSTEM

2. Retighten until ratcheting sound is heard.

CHECK FUEL FILLER CAP FUNCTION

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

>> GO TO 5.

>> GO TO 4.

CHECK FUEL TANK VACUUM RELIEF VALVE

Refer to

EC-242, "Component Inspection"

OK or NG

>> GO TO 5.

>> Replace fuel filler cap with a genuine one.

INSTALL THE PRESSURE PUMP

To locate the EVAP leak, install EVAP service port adapter and pres-

sure pump to EVAP service port securely. For the location of EVAP

service port, refer to

EC-45, "Description"

NOTE:

Improper installation of the EVAP service port adapter to the

EVAP service port may cause leaking.

With CONSULT-III>>GO TO 6.

Without CONSULT-III>>GO TO 7.

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

, 0.6 psi) of pressure in the system.

BBIA0550E

SEF916U

2010 Pathfinder

P0456 EVAP CONTROL SYSTEM

EC-283

< COMPONENT DIAGNOSIS >

[VQ40DE]

4. Using EVAP leak detector, locate the EVAP leak. For the leak

detector, refer to the instruction manual for more details.

Refer to

EC-45, "Description"

OK or NG

>> GO TO 8.

>> Repair or replace.

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

, 0.2 to 0.4 psi), then remove pump

and EVAP service port adapter.

CAUTION:

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

, 0.6 psi) of pressure in the system.

4. Using EVAP leak detector, locate the EVAP leak. For the leak

detector, refer to the instruction manual for more details. Refer

EC-45, "Description"

OK or NG

>> GO TO 8.

>> Repair or replace.

CHECK EVAP CANISTER VENT CONTROL VALVE

Check the following.

• EVAP canister vent control valve is installed properly.

Refer to

EC-498, "Removal and Installation"

• EVAP canister vent control valve.

Refer to

EC-253, "Component Inspection"

OK or NG

>> GO TO 9.

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

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

2010 Pathfinder

Content .. 271 272 273 274 ..