Nissan Pathfinder (2009 year). Manual - part 276

EC-222

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0420, P0430 THREE WAY CATALYST FUNCTION

15. Confirm that the 1st trip DTC is not detected.

If the 1st trip DTC is detected, go to 

EC-222, "Diagnosis Procedure"

.

Overall Function Check

INFOID:0000000004297412

Use this procedure to check the overall function of the three way catalyst (manifold). During this check, a 1st
trip DTC might not be confirmed.

 WITH GST

1.

Start engine and warm it up to the 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 keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.

6.

Let engine idle for 1 minute.

7.

Open engine hood.

8.

Set voltmeter probe between ECM terminals 74 [HO2S2 (bank
1) signal], 55 [HO2S2 (bank 2) signal] and ground.

9.

Keep engine speed at 2,500 rpm constant under no load.

10. Make sure that the voltage does not vary for more than 5 sec-

onds.
If the voltage fluctuation cycle takes less than 5 seconds, go to

EC-222, "Diagnosis Procedure"

.

• 1 cycle: 0.6 - 1.0 

→

 0 - 0.3 

→

 0.6 - 1.0

Diagnosis Procedure

INFOID:0000000004297413

1.

CHECK EXHAUST SYSTEM

Visually check exhaust tubes and muffler for dent.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace.

2.

CHECK EXHAUST GAS LEAK

1.

Start engine and run it at idle.

2.

Listen for an exhaust gas leak before the three way catalyst (manifold).

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace.

3.

CHECK INTAKE AIR LEAK

Listen for an intake air leak after the mass air flow sensor.

OK or NG

OK

>> GO TO 4.

PBIB1108E

PBIB1216E

2009 Pathfinder

P0420, P0430 THREE WAY CATALYST FUNCTION

EC-223

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NG

>> Repair or replace.

4.

CHECK IGNITION TIMING

Check the following items. Refer to 

EC-20, "Basic Inspection"

.

OK or NG

OK

>> GO TO 5.

NG

>> Follow the 

EC-20, "Basic Inspection"

.

5.

CHECK FUEL INJECTOR

1.

Stop engine and then turn ignition switch ON.

2.

Check voltage between ECM terminals 21, 22, 23, 40, 41, 42
and ground with CONSULT-III or tester.
Refer to Wiring Diagram for FUEL INJECTOR, 

EC-433, "Wiring

Diagram - ENGINE CONTROL SYSTEM -"

.

OK or NG

OK

>> GO TO 6.

NG

>> Perform 

EC-394, "Diagnosis Procedure"

.

6.

CHECK FUNCTION OF IGNITION COIL-I

CAUTION:

Perform the following procedure in a place with no combustible objects andgood ventilation.
1.

Turn ignition switch OFF.

2.

Remove fuel pump fuse (No.48) in IPDM E/R to release fuel
pressure.
NOTE:
Never use CONSULT-III to release fuel pressure, or fuel pres-
sure applies again during the following procedure.

3.

Start engine.

4.

After engine stalls, crank it two or three times to release all fuel
pressure.

5.

Turn ignition switch OFF.

6.

Remove all ignition coil harness connectors to avoid the electri-
cal discharge from the ignition coils.

7.

Remove ignition coil and spark plug of the cylinder to be
checked.

8.

Crank engine for five seconds or more to remove combustion gas in the cylinder.

9.

Connect spark plug and harness connector to ignition coil.

10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -

0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.

11. Crank engine for about three seconds, and check whether spark

is generated between the spark plug and the grounded metal
portion.

CAUTION:

• Never place to the spark plug and the ignition coil within

50 cm (19.7 in)each other. Be careful not to get an electri-
cal shock while checking, because the electrical dis-
charge voltage becomes 20 kV or more.

Items

Specifications

Target idle speed

625 

±

 50 rpm (in P or N position)

Ignition timing

15 

±

 5

°

 BTDC (in P or N position)

Battery voltage should exist.

PBIB1172E

Spark should be generated.

BBIA0534E

JMBIA0066GB

2009 Pathfinder

EC-224

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0420, P0430 THREE WAY CATALYST FUNCTION

• It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is made.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is mal-
functioning.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 7.

7.

CHECK FUNCTION OF IGNITION COIL-II

1.

Turn ignition switch OFF.

2.

Disconnect spark plug and connect a known-good spark plug.

3.

Crank engine for approximately 3 seconds, and recheck whether spark is generated between the spark
plug and the grounded metal portion.

OK or NG

OK

>> GO TO 8.

NG

>> Check ignition coil, power transistor and their circuits. Refer to 

EC-402

.

8.

CHECK SPARK PLUG

Check the initial spark plug for fouling, etc.
OK or NG

OK

>> Replace spark plug(s) with standard type one(s). For

spark plug type, refer to 

EM-16, "Removal and Installa-

tion"

.

NG

>> 1.

Repair or clean spark plug.

2.

GO TO 9.

9.

CHECK FUNCTION OF IGNITION COIL-III

1.

Reconnect the initial spark plugs.

2.

Crank engine for a@@rpximately 3 seconds, and recheck whether spark is generated between the spark
plug and the grounded portion.

OK or NG

OK

>> INSPECTION END

NG

>> Replace spark plug(s) with standard type one(s). For spark plug type, refer to 

EM-16, "Removal

and Installation"

.

10.

CHECK FUEL INJECTOR

1.

Turn ignition switch OFF.

2.

Remove fuel injector assembly.
Refer to 

EM-45, "Removal and Installation"

.

Keep fuel hose and all fuel injectors connected to fuel tube.

3.

Reconnect all fuel injector harness connectors.

4.

Disconnect all ignition coil harness connectors.

5.

Turn ignition switch ON.
Check that fuel does not drip from fuel injector.

OK or NG

OK (Does not drip.)>>GO TO 11.
NG (Drips.)>>Replace the fuel injector(s) from which fuel is dripping.

11.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-49, "Intermittent Incident"

.

Spark should be generated.

SEF156I

Spark should be generated.

2009 Pathfinder

P0420, P0430 THREE WAY CATALYST FUNCTION

EC-225

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Trouble is fixed.>>INSPECTION END
Trouble is not fixed.>>Replace three way catalyst (manifold).

2009 Pathfinder

EC-226

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0441 EVAP CONTROL SYSTEM

P0441 EVAP CONTROL SYSTEM

System Description

INFOID:0000000004297414

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:0000000004297415

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:0000000004297416

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.

2.

Turn ignition switch ON.

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

2009 Pathfinder

P0441 EVAP CONTROL SYSTEM

EC-227

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3.

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

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 CONFIRMATION” mode with CON-
SULT-III.

7.

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

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 chang for a long time, retry from step 2.

9.

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

EC-

227, "Diagnosis Procedure"

.

Overall Function Check

INFOID:0000000004297417

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

1.

Lift up drive wheels.

2.

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

3.

Turn ignition switch OFF, wait at least 10 seconds.

4.

Turn ignition switch ON.

5.

Turn ignition switch OFF, wait at least 10 seconds.

6.

Start engine and wait at least 70 seconds.

7.

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

8.

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

9.

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-227, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000004297418

1.

CHECK EVAP CANISTER

Selector lever

Suitable position

VHCL SPEED SE

32 - 120 km/h (20 - 75 MPH)

ENG SPEED

500 - 3,000 rpm

B/FUEL SCHDL

1.3 - 9.0 msec

COOLAN TEMP/S

70 - 100

°

C (158 - 212

°

F)

Air conditioner switch

ON

Headlamp switch

ON

Rear window defogger switch

ON

Engine speed

Approx. 3,000 rpm

Gear position

Any position other than P, N or R

PBIB1109E

2009 Pathfinder

EC-228

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0441 EVAP CONTROL SYSTEM

1.

Turn ignition switch OFF.

2.

Check EVAP canister for cracks.

OK or NG

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

>> Replace EVAP canister.

2.

CHECK PURGE FLOW

 With CONSULT-III

1.

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-45, "Description"

.

2.

Start engine and let it idle.

3.

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

4.

Rev engine up to 2,000 rpm.

5.

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

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 4.

3.

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 at EVAP ser-
vice port and install vacuum gauge. For the location of EVAP service port, refer to 

EC-45, "Description"

.

4.

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

5.

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

6.

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

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 4.

4.

CHECK EVAP PURGE LINE

1.

Turn ignition switch OFF.

2.

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

EC-45, "Description"

.

OK or NG

OK

>> GO TO 5.

NG

>> Repair it.

5.

CHECK EVAP PURGE HOSE AND PURGE PORT

PURG VOL CONT/V

Vacuum

100%

Should exist.

0%

Should not exist.

Vacuum should not exist.

Vacuum should exist.

2009 Pathfinder

P0441 EVAP CONTROL SYSTEM

EC-229

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1.

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

2.

Blow air into each hose and EVAP purge port (C).

3.

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.

6.

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

OK

>> GO TO 8.

NG

>> GO TO 7.

7.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-245, "Component Inspection"

.

OK or NG

OK

>> GO TO 8.

NG

>> Replace EVAP canister purge volume control solenoid valve.

8.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1.

Disconnect EVAP control system pressure sensor harness connector.

2.

Check connectors for water.

OK or NG

OK

>> GO TO 9.

NG

>> Replace EVAP control system pressure sensor.

9.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION

Refer to 

EC-258, "DTC Confirmation Procedure"

 for DTC P0452, 

EC-262, "DTC Confirmation Procedure"

 for

P0453.
OK or NG

OK

>> GO TO 10.

NG

>> 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.

2009 Pathfinder