Content .. 325 326 327 328 ..

Nissan Pathfinder (2010 year). Manual - part 327

EC-708

< COMPONENT DIAGNOSIS >

[VK56DE]

P0441 EVAP CONTROL SYSTEM

P0441 EVAP CONTROL SYSTEM

System Description

INFOID:0000000005257672

NOTE:

If DTC P0441 is displayed with other DTC such as P2122, P2123, P2127, P2128 or P2138, first perform

the trouble diagnosis for other DTC.

In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions.

Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP

canister purge volume control solenoid valve is open to admit purge flow. Purge flow exposes the EVAP con-

trol system pressure sensor to intake manifold vacuum.

On Board Diagnosis Logic

INFOID:0000000005257673

Under normal conditions (non-closed throttle), sensor output voltage indicates if pressure drop and purge flow

are adequate. If not, a malfunction is determined.

DTC Confirmation Procedure

INFOID:0000000005257674

CAUTION:

Always drive vehicle at a safe speed.

NOTE:

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting 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:

PBIB3640E

DTC No. Trouble diagnosis name

DTC detecting condition

Possible cause

P0441
0441

EVAP control system in-
correct purge flow

EVAP control system does not operate properly.
EVAP control system has a leak between intake
manifold and EVAP control system pressure
sensor.

• EVAP canister purge volume control sole-

noid valve stuck closed

• EVAP control system pressure sensor and

the circuit

• Loose, disconnected or improper connec-

tion of rubber tube

• Blocked rubber tube
• Cracked EVAP canister
• EVAP canister purge volume control sole-

noid valve circuit

• Accelerator pedal position sensor
• Blocked purge port
• EVAP canister vent control valve
• Drain filter

2010 Pathfinder

P0441 EVAP CONTROL SYSTEM

EC-709

< COMPONENT DIAGNOSIS >

[VK56DE]

Always perform test at a temperature of 5

C (41

F) or more.

WITH CONSULT-III

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

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

3. Turn ignition switch ON.

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

5. Start engine and let it idle for at least 70 seconds.

6. Select “PURG FLOW P0441” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode with CON-

SULT-III.

7. Touch “START”.

If “COMPLETED” is displayed, go to step 9.

8. When the following conditions are met, “TESTING” will be displayed on the CONSULT-III screen.

Maintain the conditions continuously until “TESTING” changes to “COMPLETED”. (It will take at least 35

seconds.)

If “TESTING” does not change for a long time, retry from step 2.

9. Check that “OK” is displayed after touching “SELF-DIAG RESULTS”.

If “NG” is displayed, go to

EC-709, "Diagnosis Procedure"

Overall Function Check

INFOID:0000000005257675

Use this procedure to check the overall function of the EVAP control system purge flow monitoring. During this

check, a 1st trip DTC might not be confirmed.

WITH GST

1. Lift up drive wheels.
2. Start engine (VDC switch OFF) and warm it up to normal operating temperature.
3. Turn ignition switch OFF, wait at least 10 seconds.
4. Start engine and wait at least 70 seconds.
5. Set voltmeter probes to ECM terminals 32 (EVAP control system

pressure sensor signal) and ground.

6. Check EVAP control system pressure sensor value at idle speed

and note it.

7. Establish and maintain the following conditions for at least 1

minute.

8. Verify that EVAP control system pressure sensor value stays 0.1 V less than the value at idle speed (mea-

sured at step 8) for at least 1 second.

9. If NG, go to

EC-709, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000005257676

CHECK EVAP CANISTER

1. Turn ignition switch OFF.

2. Check EVAP canister for cracks.

Selector lever

Suitable position

VHCL SPEED SE

32 - 120 km/h (20 - 75 MPH)

ENG SPEED

500 - 3,000 rpm

B/FUEL SCHDL

1.0 - 12.0 msec

COOLAN TEMP/S

More than 0

C (32

Air conditioner switch

Headlamp switch

Engine speed

Approx. 3,000 rpm

Selector lever position

Any position other than P, N or R

PBIB1109E

2010 Pathfinder

EC-710

< COMPONENT DIAGNOSIS >

[VK56DE]

P0441 EVAP CONTROL SYSTEM

OK or NG

OK (With CONSULT-III)>>GO TO 2.

OK (Without CONSULT-III)>>GO TO 3.

>> Replace EVAP canister.

CHECK PURGE FLOW

With CONSULT-III

1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve and EVAP

service port from EVAP service port. For the location of EVAP service port, refer to

EC-531, "Description"

2. Install vacuum gauge between the vacuum hose and EVAP service port.

3. Start engine and let it idle.

4. Select “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-III.

5. Rev engine up to 2,000 rpm.

6. Touch “Qd” and “Qu” on CONSULT-III screen to adjust “PURG VOL C/V” opening and check vacuum

existence.

OK or NG

>> GO TO 7.

>> GO TO 4.

CHECK PURGE FLOW

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. For the location of EVAP service port, refer to

EC-531, "Description"

4. Install vacuum gauge between the vacuum hose and EVAP service port.

5. Start engine and let it idle.

Never depress accelerator pedal even slightly.

6. Check vacuum gauge indication before 60 seconds pass after starting engine.

7. Rev engine up to 2,000 rpm after 100 seconds pass after starting engine.

OK or NG

>> GO TO 7.

>> GO TO 4.

CHECK EVAP PURGE LINE

1. Turn ignition switch OFF.

2. Check EVAP purge line for improper connection or disconnection.

Refer to

EC-531, "Description"

OK or NG

>> GO TO 5.

>> Repair malfunctioning part.

CHECK EVAP PURGE HOSE AND PURGE PORT

PURG VOL C/V

Vacuum

100%

Should exist.

Should not exist.

Vacuum should not exist.

Vacuum should exist.

2010 Pathfinder

P0441 EVAP CONTROL SYSTEM

EC-711

< COMPONENT DIAGNOSIS >

[VK56DE]

1. Disconnect purge hoses connected to EVAP service port

and

EVAP canister purge volume control solenoid valve

2. Blow air into each hose and EVAP purge port

3. Check that air flows freely.
OK or NG

OK (With CONSULT-III)>>GO TO 6.

OK (Without CONSULT-III)>>GO TO 7.

>> Repair or clean hoses and/or purge port.

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 8.

>> GO TO 7.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to

EC-727, "Component Inspection"

OK or NG

>> GO TO 8.

>> Replace EVAP canister purge volume control solenoid valve.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1. Disconnect EVAP control system pressure sensor harness connector.

2. Check connectors for water.

OK or NG

>> GO TO 9.

>> Replace EVAP control system pressure sensor.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION

Refer to DTC Confirmation Procedure for DTC P0452,

EC-740, "DTC Confirmation Procedure"

and for P0453,

EC-744, "DTC Confirmation Procedure"

OK or NG

>> GO TO 10.

>> Replace EVAP control system pressure sensor.

10.

CHECK RUBBER TUBE FOR CLOGGING

1. Disconnect rubber tube connected to EVAP canister vent control valve.

SEF367U

SEF368U

Water should not exist.

2010 Pathfinder

EC-712

< COMPONENT DIAGNOSIS >

[VK56DE]

P0441 EVAP CONTROL SYSTEM

2. Check the rubber tube for clogging.
OK or NG

>> GO TO 11.

>> Clean the rubber tube using an air blower.

11.

CHECK DRAIN FILTER

Refer to

EC-712, "Component Inspection"

OK or NG

>> GO TO 12.

>> Replace drain filter.

12.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to

EC-730, "Component Inspection"

OK or NG

>> GO TO 13.

>> Replace EVAP canister vent control valve.

13.

CHECK EVAP PURGE LINE

Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.

Refer to

EC-531, "Description"

OK or NG

>> GO TO 14.

>> Replace malfunctioning part.

14.

CLEAN EVAP PURGE LINE

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

>> GO TO 15.

15.

CHECK INTERMITTENT INCIDENT

Refer to

GI-37, "Intermittent Incident"

INSPECTION END

Component Inspection

INFOID:0000000005257677

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.

PBIB3641E

2010 Pathfinder

P0442 EVAP CONTROL SYSTEM

EC-713

< COMPONENT DIAGNOSIS >

[VK56DE]

P0442 EVAP CONTROL SYSTEM

On Board Diagnosis Logic

INFOID:0000000005257678

This diagnosis detects leaks in the EVAP purge line using engine intake manifold vacuum.

If pressure does not increase, the ECM will check for leaks in the line between the fuel tank and EVAP canister

purge volume control solenoid valve, under the following “Vacuum test” conditions.

The EVAP canister vent control valve is closed to shut the EVAP purge line off. The EVAP canister purge vol-

ume control solenoid valve will then be opened to depressurize the EVAP purge line using intake manifold

vacuum. After this occurs, the EVAP canister purge volume control solenoid valve will be closed.

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

P0442
0442

EVAP control system
small leak detected
(negative pressure)

EVAP control system has a leak, EVAP
control system does not operate prop-
erly.

• Incorrect fuel tank vacuum relief valve
• Incorrect fuel filler cap used
• Fuel filler cap remains open or does not 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
• Drain filter
• O-ring of EVAP canister vent control valve is

missing or damaged

• EVAP canister is saturated with water
• EVAP control system pressure sensor
• Fuel level sensor and the circuit
• Refueling EVAP vapor cut valve
• ORVR system leaks

PBIB3640E

2010 Pathfinder

EC-714

< COMPONENT DIAGNOSIS >

[VK56DE]

P0442 EVAP CONTROL SYSTEM

DTC Confirmation Procedure

INFOID:0000000005257679

NOTE:

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting 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:

•

Perform “DTC WORK SUPPORT” when the fuel level is between 1/4 and 3/4 full, and vehicle is placed

on flat level surface.

•

Always perform test at a temperature of 0 to 30

C (32 to 86

F).

WITH CONSULT-III

1. Turn ignition switch ON.

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

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

4. Check that the following conditions are met.

COOLAN TEMP/S: 0 - 70

C (32 - 158

INT/A TEMP SE: 0 - 30

C (32 - 86

5. Select “EVP SML LEAK P0442/P1442” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode

with CONSULT-III.

Follow the instructions displayed.

NOTE:

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

EC-506, "Basic Inspection"

6. Check that “OK” is displayed.

If “NG” is displayed, go to

EC-714, "Diagnosis Procedure"

NOTE:

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

properly.

WITH GST

NOTE:

Always read the explanation of “Driving Pattern” in

EC-536, "Emission-related Diagnostic Information"

before

driving vehicle.

1. Start engine.

2. Drive vehicle according to “Driving Pattern” in

EC-536, "Emission-related Diagnostic Information"

3. Stop vehicle.

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

5. Turn ignition switch ON.

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

7. Select Service $07 with GST.

If P0442 is displayed on the screen, go to

EC-714, "Diagnosis Procedure"

If P0441 is displayed on the screen, go to

EC-709, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000005257680

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.

SEF915U

2010 Pathfinder

P0442 EVAP CONTROL SYSTEM

EC-715

< COMPONENT DIAGNOSIS >

[VK56DE]

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.

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-719, "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 (commer-

cial service tool) and pressure pump to EVAP service port 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)

• EVAP service port (2)
•

: Vehicle front

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.

ALBIA0349ZZ

SEF916U

2010 Pathfinder

Content .. 325 326 327 328 ..