Content .. 333 334 335 336 ..

Nissan Pathfinder (2012 year). Manual - part 335

P0441 EVAP CONTROL SYSTEM

EC-761

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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-761, "Component Inspection"

OK or NG

>> GO TO 12.

>> Replace drain filter. Refer to

EC-516

12.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to

EC-779, "Component Inspection"

OK or NG

>> GO TO 13.

>> Replace EVAP canister vent control valve.

FL-16, "Removal and Installation"

13.

CHECK EVAP PURGE LINE

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

Refer to

EC-516, "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:0000000007358629

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-516

PBIB3641E

August 2012

2012 Pathfinder

EC-762

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0442 EVAP CONTROL SYSTEM

P0442 EVAP CONTROL SYSTEM

On Board Diagnosis Logic

INFOID:0000000007358630

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

August 2012

2012 Pathfinder

P0442 EVAP CONTROL SYSTEM

EC-763

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

DTC Confirmation Procedure

INFOID:0000000007358631

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

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.

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

with CONSULT.

Follow the instructions displayed.

NOTE:

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

EC-

592, "Basic Inspection"

6. Check that “OK” is displayed.

If “NG” is displayed, go to

EC-763, "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-527, "DIAGNOSIS DESCRIPTION : Driving Pattern"

before driving vehicle.

1. Start engine.

2. Drive vehicle according to “Driving Pattern” in

EC-527, "DIAGNOSIS DESCRIPTION : Driving Pattern"

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-763, "Diagnosis Procedure"

If P0441 is displayed on the screen, go to

EC-758, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000007358632

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

August 2012

2012 Pathfinder

EC-764

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0442 EVAP CONTROL SYSTEM

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-768, "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>>GO TO 6.

Without CONSULT>>GO TO 7.

CHECK FOR EVAP LEAK

With CONSULT

1. Turn ignition switch ON.

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

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

August 2012

2012 Pathfinder

P0442 EVAP CONTROL SYSTEM

EC-765

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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

>> GO TO 8.

>> Repair or replace malfunctioning part.

CHECK FOR EVAP LEAK

Without CONSULT

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 the

pressure pump and EVAP service port adapter (commercial ser-

vice tool). Refer to

FL-16, "Removal and Installation"

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 (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

>> GO TO 8.

>> Repair or replace malfunctioning part+.

CHECK DRAIN FILTER

Refer to

EC-768, "Component Inspection"

OK or NG

>> GO TO 9.

>> Replace drain filter. Refer to

EC-516

CHECK EVAP CANISTER VENT CONTROL VALVE

Check the following.

• EVAP canister vent control valve is installed properly.

Refer to

FL-16, "Component Inspection"

• EVAP canister vent control valve.

Refer to

FL-16, "Component Inspection"

OK or NG

>> GO TO 10.

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

FL-16, "Removal and

Installation"

10.

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

SEF200U

AWBIA0134ZZ

SEF200U

August 2012

2012 Pathfinder

EC-766

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0442 EVAP CONTROL SYSTEM

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

attached. Refer to

FL-16, "Removal and Installation"

2. Does water drain from the EVAP canister?
Yes or No

Yes

>> GO TO 11.

No (With CONSULT)>>GO TO 13.

No (Without CONSULT)>>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.

The weight should be less than 2.0 kg (4.4 lb).

OK or NG

OK (With CONSULT)>>GO TO 13.

OK (Without CONSULT)>>GO TO 14.

>> 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. Refer to

FL-16, "Removal and Installation"

13.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT

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 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

>> GO TO 16.

>> GO TO 15.

14.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

Without CONSULT

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

>> GO TO 17.

>> GO TO 15.

BBIA0558E

Vacuum should exist.

August 2012

2012 Pathfinder

P0442 EVAP CONTROL SYSTEM

EC-767

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

15.

CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. Refer to

EC-516, "Description"

OK or NG

>> GO TO 16.

>> Repair or reconnect the hose.

16.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to

EC-776, "Component Inspection"

OK or NG

>> GO TO 17.

>> Replace EVAP canister purge volume control solenoid valve. Refer to

EM-165

17.

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to

EC-730, "Component Inspection"

OK or NG

>> GO TO 18.

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

FL-18

18.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to

EC-788, "Component Inspection"

OK or NG

>> GO TO 19.

>> Replace EVAP control system pressure sensor. Refer to

FL-16, "Removal and Installation"

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-516, "Description"

OK or NG

>> GO TO 20.

>> 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-937, "System Description"

OK or NG

>> GO TO 22.

>> 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

>> GO TO 23.

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

23.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to

EC-940, "Component Inspection"

OK or NG

>> GO TO 24.

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

FL-16, "Removal and Installation"

August 2012

2012 Pathfinder

EC-768

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0442 EVAP CONTROL SYSTEM

24.

CHECK FUEL LEVEL SENSOR

Refer to

MWI-34, "Component Function Check"

OK or NG

>> GO TO 25.

>> Replace fuel level sensor unit. Refer to

FL-18

25.

CHECK INTERMITTENT INCIDENT

Refer to

GI-37, "Intermittent Incident"

INSPECTION END

Component Inspection

INFOID:0000000007358633

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

SEF445Y

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

PBIB3641E

August 2012

2012 Pathfinder

Content .. 333 334 335 336 ..