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Nissan Pathfinder (2008 year). Manual - part 323

P0442 EVAP CONTROL SYSTEM

EC-701

< COMPONENT DIAGNOSIS >

[VK56DE]

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.

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-705, "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.
NOTE:
Improper installation of the EVAP service port adapter to the
EVAP service port may cause leaking.
• 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.

SEF915U

ALBIA0349ZZ

SEF916U

EC-702

< COMPONENT DIAGNOSIS >

[VK56DE]

P0442 EVAP CONTROL SYSTEM

CHECK FOR EVAP LEAK

With CONSULT-III

Turn ignition switch ON.

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

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

, 0.6 psi) of pressure in the system.

Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction manual for more details.
Refer to

EC-517, "Description"

OK or NG

>> GO TO 8.

>> Repair or replace.

CHECK FOR EVAP LEAK

Without CONSULT-III

Turn ignition switch OFF.

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 ccanister (4)

Drain filter (5)

: Vehicle front

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

, 0.6 psi) of pressure in the system.

Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction manual for more details. Refer
to

EC-517, "Description"

OK or NG

>> GO TO 8.

>> Repair or replace.

CHECK DRAIN FILTER

Refer to

EC-705, "Component Inspection"

OK or NG

>> GO TO 9.

>> Replace drain filter.

CHECK EVAP CANISTER VENT CONTROL VALVE

Check the following.

SEF200U

AWBIA0134ZZ

SEF200U

P0442 EVAP CONTROL SYSTEM

EC-703

< COMPONENT DIAGNOSIS >

[VK56DE]

• EVAP canister vent control valve is installed properly.

Refer to

EC-952, "Removal and Installation"

• EVAP canister vent control valve.

Refer to

EC-717, "Component Inspection"

OK or NG

>> GO TO 10.

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

10.

CHECK IF EVAP CANISTER SATURATED WITH WATER

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

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

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

Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.

Start engine.

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

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

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-III

Start engine and warm it up to normal operating temperature.

Stop engine.

Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.

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

BBIA0558E

Vacuum should exist.

EC-704

< COMPONENT DIAGNOSIS >

[VK56DE]

P0442 EVAP CONTROL SYSTEM

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

OK or NG

>> GO TO 17.

>> GO TO 15.

15.

CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. Refer to

EC-517, "Description"

OK or NG

>> GO TO 16.

>> Repair or reconnect the hose.

16.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to

EC-714, "Component Inspection"

OK or NG

>> GO TO 17.

>> Replace EVAP canister purge volume control solenoid valve.

17.

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to

EC-663, "Component Inspection"

OK or NG

>> GO TO 18.

>> Replace fuel level sensor unit.

18.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to

EC-725, "Component Inspection"

OK or NG

>> GO TO 19.

>> 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-517, "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, kink, looseness and improper con-
nection. For location, refer to

EC-875

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, kink, cracks, looseness and
improper connection.
OK or NG

>> GO TO 23.

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

Vacuum should exist.

P0442 EVAP CONTROL SYSTEM

EC-705

< COMPONENT DIAGNOSIS >

[VK56DE]

23.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to

EC-878, "Component Inspection"

OK or NG

>> GO TO 24.

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

24.

CHECK FUEL LEVEL SENSOR

Refer to

MWI-32, "Component Function Check"

OK or NG

>> GO TO 25.

>> Replace fuel level sensor unit.

25.

CHECK INTERMITTENT INCIDENT

Refer to

GI-51, "Intermittent Incident"

>> INSPECTION END

Component Inspection

INFOID:0000000001537781

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

Wipe clean valve housing.

Check valve opening pressure and vacuum.

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 come on.

DRAIN FILTER

Check visually for insect nests in the drain filter air inlet.

Check visually for cracks or flaws in the appearance.

Check visually for cracks or flaws in the hose.

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

EC-706

< COMPONENT DIAGNOSIS >

[VK56DE]

P0442 EVAP CONTROL SYSTEM

Blow air into port A and check that it flows freely out of port B.

Block port B.

Blow air into port A and check that there is no leakage.

If NG, replace drain filter.

PBIB3641E

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-707

< COMPONENT DIAGNOSIS >

[VK56DE]

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Description

INFOID:0000000001537782

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.

On Board Diagnosis Logic

INFOID:0000000001537783

Sensor

Input signal to ECM

ECM function

Actuator

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

Engine speed*

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*

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*

PBIB2057E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0443
0443

EVAP canister purge
volume control solenoid
valve

The canister purge flow is detected during the
specified driving conditions, even when EVAP
canister purge volume control solenoid valve is
completely closed.

• EVAP control system pressure sensor
• EVAP canister purge volume control so-

lenoid valve
(The valve is stuck open.)

• EVAP canister vent control valve
• Drain filter
• EVAP canister
• Hoses

(Hoses are connected incorrectly or
clogged.)

EC-708

< COMPONENT DIAGNOSIS >

[VK56DE]

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

DTC Confirmation Procedure

INFOID:0000000001537784

NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
1.

Turn ignition switch OFF and wait at least 10 seconds.

Turn ignition switch ON.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Always perform test at a temperature of 5

C (41

F) or more.

WITH CONSULT-III

Start engine and warm it up to normal operating temperature.

Turn ignition switch OFF and wait at least 10 seconds.

Turn ignition switch ON.

Turn ignition switch OFF and wait at least 10 seconds.

Turn ignition switch ON.

Select “PURG VOL CN/V P1444” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode with
CONSULT-III.

Touch “START”.

Start engine and let it idle until “TESTING” on CONSULT-III changes to “COMPLETED”. (It will take
approximately 10 seconds.)
If “TESTING” is not displayed after 5 minutes, retry from step 2.

Make sure that “OK” is displayed after touching “SELF-DIAG RESULTS”. If “NG” is displayed, refer to

EC-

708, "Diagnosis Procedure"

WITH GST

Start engine and warm it up to normal operating temperature.

Turn ignition switch OFF and wait at least 10 seconds.

Turn ignition switch ON.

Turn ignition switch OFF and wait at least 10 seconds.

Start engine and let it idle for at least 20 seconds.

Select Service $07 with GST.

If 1st trip DTC is detected, go to

EC-708, "Diagnosis Procedure"