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Nissan Pathfinder (2008 year). Manual - part 322

P0420, P0430 THREE WAY CATALYST FUNCTION

EC-693

< COMPONENT DIAGNOSIS >

[VK56DE]

Trouble is fixed.>>INSPECTION END
Trouble is not fixed.>>Replace three way catalyst assembly.

EC-694

< COMPONENT DIAGNOSIS >

[VK56DE]

P0441 EVAP CONTROL SYSTEM

P0441 EVAP CONTROL SYSTEM

System Description

INFOID:0000000001537772

NOTE:
If DTC P0441 is displayed with other DTC such as P2122, P2123, P2127, P2128 or P2138, first perform
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:0000000001537773

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:0000000001537774

CAUTION:

Always drive vehicle at a safe speed.
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:

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 proper-
ly, EVAP control system has a leak between in-
take manifold and EVAP control system
pressure sensor.

• EVAP canister purge volume control so-

lenoid valve stuck closed

• EVAP control system pressure sensor

and the circuit

• Loose, disconnected or improper con-

nection of rubber tube

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

lenoid valve circuit

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

P0441 EVAP CONTROL SYSTEM

EC-695

< COMPONENT DIAGNOSIS >

[VK56DE]

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.

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

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

Touch “START”.
If “COMPLETED” is displayed, go to step 7.

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” is not changed for a long time, retry from step 2.

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

EC-

695, "Diagnosis Procedure"

Overall Function Check

INFOID:0000000001537775

Use this procedure to check the overall monitoring function of the EVAP control system purge flow monitoring.
During this check, a 1st trip DTC might not be confirmed.

WITH GST

Lift up drive wheels.

Start engine (VDC switch OFF) and warm it up to normal operating temperature.

Turn ignition switch OFF, wait at least 10 seconds.

Turn ignition switch ON.

Turn ignition switch OFF and wait at least 10 seconds.

Start engine and wait at least 70 seconds.

Set voltmeter probes to ECM terminals 32 (EVAP control system
pressure sensor signal) and ground.

Check EVAP control system pressure sensor value at idle speed
and note it.

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

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

sured at step 6) for at least 1 second.

11. If NG, go to

EC-695, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000001537776

CHECK EVAP CANISTER

Turn ignition switch OFF.

Check EVAP canister for cracks.

OK or NG

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

0 - 119

C (32 - 246

Air conditioner switch

Headlamp switch

Engine speed

Approx. 3,000 rpm

Gear position

Any position other than P, N or R

PBIB1109E

EC-696

< COMPONENT DIAGNOSIS >

[VK56DE]

P0441 EVAP CONTROL SYSTEM

OK (With CONSULT-III)>>GO TO 2.
OK (Without CONSULT-III)>>GO TO 3.
NG

>> Replace EVAP canister.

CHECK PURGE FLOW

With CONSULT-III

Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser-
vice port and install vacuum gauge. For the location of EVAP service port, refer to

EC-517, "Description"

Start engine and let it idle.

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

Rev engine up to 2,000 rpm.

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

OK or NG

>> GO TO 7.

>> GO TO 4.

CHECK PURGE FLOW

Without CONSULT-III

Start engine and warm it up to normal operating temperature.

Stop engine.

Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser-
vice port and install vacuum gauge. For the location of EVAP service port, refer to

EC-517, "Description"

Start engine and let it idle.
Do not depress accelerator pedal even slightly.

Check vacuum gauge indication before 60 seconds passed after starting engine.

Revving engine up to 2,000 rpm after 100 seconds passed after starting engine.

OK or NG

>> GO TO 7.

>> GO TO 4.

CHECK EVAP PURGE LINE

Turn ignition switch OFF.

Check EVAP purge line for improper connection or disconnection.
Refer to

EC-517, "Description"

OK or NG

>> GO TO 5.

>> Repair it.

CHECK EVAP PURGE HOSE AND PURGE PORT

PURG VOL CONT/V

Vacuum

100%

Should exist.

Should not exist.

Vacuum should not exist.

Vacuum should exist.

P0441 EVAP CONTROL SYSTEM

EC-697

< COMPONENT DIAGNOSIS >

[VK56DE]

Disconnect purge hoses connected to EVAP service port A and
EVAP canister purge volume control solenoid valve B.

Blow air into each hose and EVAP purge port C.

Check that air flows freely.

OK or NG

OK (With CONSULT-III)>>GO TO 6.
OK (Without CONSULT-III)>>GO TO 7.
NG

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

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-III

Start engine.

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-714, "Component Inspection"

OK or NG

>> GO TO 8.

>> Replace EVAP canister purge volume control solenoid valve.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

Disconnect EVAP control system pressure sensor harness connector.

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-727, "DTC Confirmation Procedure"

and P0453,

EC-731, "DTC Confirmation Procedure"

OK or NG

>> GO TO 10.

>> Replace EVAP control system pressure sensor.

10.

CHECK RUBBER TUBE FOR CLOGGING

Disconnect rubber tube connected to EVAP canister vent control valve.

SEF367U

SEF368U

Water should not exist.

EC-698

< COMPONENT DIAGNOSIS >

[VK56DE]

P0441 EVAP CONTROL SYSTEM

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-698, "Component Inspection"

OK or NG

>> GO TO 12.

>> Replace drain filter.

12.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to

EC-717, "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-517, "Description"

OK or NG

>> GO TO 14.

>> Replace it.

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-51, "Intermittent Incident"

>> INSPECTION END

Component Inspection

INFOID:0000000001537777

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.

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

P0442 EVAP CONTROL SYSTEM

EC-699

< COMPONENT DIAGNOSIS >

[VK56DE]

P0442 EVAP CONTROL SYSTEM

On Board Diagnosis Logic

INFOID:0000000001537778

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 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 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 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
• 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

EC-700

< COMPONENT DIAGNOSIS >

[VK56DE]

P0442 EVAP CONTROL SYSTEM

DTC Confirmation Procedure

INFOID:0000000001537779

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:
• 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

Turn ignition switch ON.

Turn ignition switch OFF and wait at least 10 seconds.

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

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

C (32 - 158

INT/A TEMP SE: 0 - 30

C (32 - 86

Select “EVP SML LEAK P0442/P1442” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-III.
Follow the instruction displayed.
NOTE:
If the engine speed cannot be maintained within the range displayed on the CONSULT-III screen, go to

EC-492, "Basic Inspection"

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

EC-700, "Diagnosis 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 Driving Pattern on

EC-923

before driving vehicle.

Start engine.

Drive vehicle according to Driving Pattern,

EC-923

Stop vehicle.