Nissan Pathfinder (2006 year). Manual - part 191

DTC P0442 EVAP CONTROL SYSTEM

EC-387

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2006 Pathfinder

CAUTION:

●

Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used,
the MIL may come on.

●

If the fuel filler cap is not tightened properly, the MIL may come on.

●

Use only a genuine NISSAN rubber tube as a replacement.

DTC Confirmation Procedure

UBS00K94

NOTE:

●

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait
at least 10 seconds before conducting the next test.

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-II

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-II.

4.

Make sure that the following conditions are met.
COOLAN TEMP/S: 0 - 70

°

C (32 - 158

°

F)

INT/A TEMP SE: 0 - 30

°

C (32 - 86

°

F)

5.

Select “EVP SML LEAK P0442/P1442” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-II.
Follow the instruction displayed.

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

EC-70, "Basic Inspection"

 .

PBIB2643E

PBIB0829E

EC-388

DTC P0442 EVAP CONTROL SYSTEM

2006 Pathfinder

6.

Make sure that “OK” is displayed.
If “NG” is displayed, refer to 

EC-388, "Diagnostic Procedure"

 .

NOTE:
Make sure that EVAP hoses are connected to EVAP canister
purge volume control solenoid valve properly.

 WITH GST

NOTE:
Be sure to read the explanation of 

EC-57, "Driving Pattern"

   before driving vehicle.

1.

Start engine.

2.

Drive vehicle according to 

EC-57, "Driving Pattern"

 .

3.

Stop vehicle.

4.

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

5.

Select Service $07 with GST.

–

If P0442 is displayed on the screen, go to 

EC-388, "Diagnostic Procedure"

 .

–

If P0441 is displayed on the screen, go to 

EC-383, "Diagnostic Procedure"

 .

Diagnostic Procedure

UBS00K95

1. 

CHECK FUEL FILLER CAP DESIGN

1.

Turn ignition switch OFF.

2.

Check for genuine NISSAN fuel filler cap design.

OK or NG

OK

>> GO TO 2.

NG

>> Replace with genuine NISSAN fuel filler cap.

2. 

CHECK FUEL FILLER CAP INSTALLATION

Check that the cap is tightened properly by rotating the cap clockwise.

OK or NG

OK

>> GO TO 3.

NG

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

2. Retighten until ratcheting sound is heard.

3. 

CHECK FUEL FILLER CAP FUNCTION

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

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

SEC763C

SEF915U

DTC P0442 EVAP CONTROL SYSTEM

EC-389

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2006 Pathfinder

4. 

CHECK FUEL TANK VACUUM RELIEF VALVE

Refer to 

EC-35, "FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FULLER CAP)"

 .

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 and pres-
sure pump to EVAP service port securely. For the location of EVAP
service port, refer to 

EC-33, "EVAPORATIVE EMISSION LINE

DRAWING"

 .

NOTE:
Improper installation of the EVAP service port adapter to the EVAP service port may cause leaking.

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

BBIA0550E

SEF916U

EC-390

DTC P0442 EVAP CONTROL SYSTEM

2006 Pathfinder

6. 

CHECK FOR EVAP LEAK

 With CONSULT-II

1.

Turn ignition switch ON.

2.

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

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.

●

Do not exceed 4.12 kPa (0.042 kg/cm

2

 , 0.6 psi) of pres-

sure 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 to 

EC-33, "EVAPORATIVE EMISSION LINE DRAWING"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace.

7. 

CHECK FOR EVAP LEAK

 Without CONSULT-II

1.

Turn ignition switch OFF.

2.

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

3.

Pressurize the EVAP line using pressure pump with 1.3 to 2.7
kPa (10 to 20 mmHg, 0.39 to 0.79 inHg), then remove pump and
EVAP service port adapter.

CAUTION:

●

Never use compressed air or a high pressure pump.

●

Do not exceed 4.12 kPa (0.042 kg/cm

2

 , 0.6 psi) of pres-

sure 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
to 

EC-33, "EVAPORATIVE EMISSION LINE DRAWING"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace.

PEF917U

SEF200U

BBIA0551E

SEF200U

DTC P0442 EVAP CONTROL SYSTEM

EC-391

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2006 Pathfinder

8. 

CHECK EVAP CANISTER VENT CONTROL VALVE

Check the following.

●

EVAP canister vent control valve is installed properly.
Refer to 

EC-36, "Removal and Installation"

 .

●

EVAP canister vent control valve.
Refer to 

EC-414, "Component Inspection"

 .

OK or NG

OK

>> GO TO 9.

NG

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

9. 

CHECK IF EVAP CANISTER SATURATED WITH WATER

1.

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

2.

Does water drain from the EVAP canister?

Yes or No

Yes

>> GO TO 10.

No (With CONSULT-II)>>GO TO 12.
No (Without CONSULT-II)>>GO TO 13.

10. 

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-II)>>GO TO 12.
OK (Without CONSULT-II)>>GO TO 13.
NG

>> GO TO 11.

11. 

DETECT MALFUNCTIONING PART

Check the following.

●

EVAP canister for damage

●

EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

>> Repair hose or replace EVAP canister.

BBIA0558E

EC-392

DTC P0442 EVAP CONTROL SYSTEM

2006 Pathfinder

12. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

 With CONSULT-II

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-II 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

OK

>> GO TO 16.

NG

>> GO TO 14.

13. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

 Without CONSULT-II

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

OK

>> GO TO 15.

NG

>> GO TO 14.

14. 

CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. Refer to 

EC-101, "Vacuum Hose Drawing"

 .

OK or NG

OK

>> GO TO 15.

NG

>> Repair or reconnect the hose.

15. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-407, "Component Inspection"

 .

OK or NG

OK

>> GO TO 16.

NG

>> Replace EVAP canister purge volume control solenoid valve.

16. 

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to 

EC-333, "Component Inspection"

 .

OK or NG

OK

>> GO TO 17.

NG

>> Replace fuel level sensor unit.

PBIB1678E

Vacuum should exist.

DTC P0442 EVAP CONTROL SYSTEM

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2006 Pathfinder

17. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-430, "Component Inspection"

 .

OK or NG

OK

>> GO TO 18.

NG

>> Replace EVAP control system pressure sensor.

18. 

CHECK EVAP PURGE LINE

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

EC-33, "EVAPORATIVE EMISSION LINE DRAWING"

 .

OK or NG

OK

>> GO TO 19.

NG

>> Repair or reconnect the hose.

19. 

CLEAN EVAP PURGE LINE

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

>> GO TO 20.

20. 

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-39, "ON BOARD REFUELING VAPOR RECOVERY (ORVR)"

 .

OK or NG

OK

>> GO TO 21.

NG

>> Repair or replace hoses and tubes.

21. 

CHECK RECIRCULATION LINE

Check recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, looseness and
improper connection.
OK or NG

OK

>> GO TO 22.

NG

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

22. 

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-42, "Component Inspection"

 .

OK or NG

OK

>> GO TO 23.

NG

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

23. 

CHECK FUEL LEVEL SENSOR

Refer to 

DI-23, "FUEL LEVEL SENSOR UNIT"

 .

OK or NG

OK

>> GO TO 24.

NG

>> Replace fuel level sensor unit.

24. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-144, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

EC-394

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

2006 Pathfinder

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

PFP:14920

Description

UBS00KFG

SYSTEM DESCRIPTION

*1: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to the ECM through CAN communication line.

This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass pas-
sage in the EVAP canister purge volume control solenoid valve changes to control the flow rate. The EVAP
canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is
determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor
from the EVAP canister is regulated as the air flow changes.

COMPONENT DESCRIPTION

The EVAP canister purge volume control solenoid valve uses a ON/
OFF duty to control the flow rate of fuel vapor from the EVAP canis-
ter. The EVAP canister purge volume control solenoid valve is
moved by ON/OFF pulses from the ECM. The longer the ON pulse,
the greater the amount of fuel vapor that will flow through the valve.

CONSULT-II Reference Value in Data Monitor Mode

UBS00KFH

Specification data are reference values.

Sensor

Input Signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed*

1

EVAP canister 
purge flow control

EVAP canister purge vol-
ume control solenoid valve

Mass air flow sensor

Amount of intake air

Engine coolant temperature sensor

Engine coolant temperature

Battery

Battery voltage*

1

Throttle position sensor

Throttle position

Accelerator pedal position sensor

Accelerator pedal position

Air fuel ratio (A/F) sensor 1

Density of oxygen in exhaust gas
(Mixture ratio feedback signal)

Fuel tank temperature sensor

Fuel temperature in fuel tank

Wheel sensor

Vehicle speed*

2

PBIB2057E

MONITOR ITEM

CONDITION

SPECIFICATION

PURG VOL C/V

●

Engine: After warming up

●

Shift lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle
(Accelerator pedal is not depressed 
even slightly, after engine starting)

0%

2,000 rpm

—