Nissan Pathfinder (2010 year). Manual - part 330

 

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Nissan Pathfinder (2010 year). Manual - part 330

 

 

EC-732

< COMPONENT DIAGNOSIS >

[VK56DE]

P0448 EVAP CANISTER VENT CONTROL VALVE

P0448 EVAP CANISTER VENT CONTROL VALVE

Component Description

INFOID:0000000005257697

The EVAP canister vent control valve (3) is located on the EVAP

canister (4) and is used to seal the canister vent.

• Fuel filler pipe (top of frame view) (1)

• EVAP control system pressure sensor (2)

• Drain filter (5)
•

: Vehicle front

This solenoid valve responds to signals from the ECM. When the

ECM sends an ON signal, the coil in the solenoid valve is energized.

A plunger will then move to seal the canister vent. The ability to seal

the vent is necessary for the on board diagnosis of other evaporative

emission control system components.

This solenoid valve is used only for diagnosis, and usually remains

opened.

When the vent is closed, under normal purge conditions, the evapo-

rative emission control system is depressurized and allows “EVAP

Control System” diagnosis.

On Board Diagnosis Logic

INFOID:0000000005257698

DTC Confirmation Procedure

INFOID:0000000005257699

1. If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next step.

a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c.

Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON and wait at least 5 seconds.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and let it idle for at least 1 minute. 
5. Repeat next procedures 3 times.
a. Rev engine between 3,000 and 3,500 rpm, then maintain that speed for 2 minutes and 50 seconds to 3

minutes.

Do not exceed 3 minutes.

b. Fully released accelerator pedal and keep engine idle for approximately 5 seconds.
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to 

EC-733, "Diagnosis Procedure"

.

AWBIA0134ZZ

PBIB3642E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0448
0448

EVAP canister vent control 
valve close

EVAP canister vent control valve remains 
closed under specified driving conditions.

• EVAP canister vent control valve
• EVAP control system pressure sensor and 

the circuit

• Blocked rubber tube to EVAP canister vent 

control valve

• Drain filter
• EVAP canister is saturated with water

2010 Pathfinder

P0448 EVAP CANISTER VENT CONTROL VALVE

EC-733

< COMPONENT DIAGNOSIS >

[VK56DE]

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If 1st trip DTC is not detected, go to the next step.

8. Repeat next procedure 20 times.
a. Quickly rev engine between 4,000 and 4,500 rpm or more, then maintain that speed for 25 to 30 seconds.
b. Fully released accelerator pedal and keep engine idle for at least 35 seconds.

9. Check 1st trip DTC.
10. If 1st trip DTC is detected, go to 

EC-733, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005257700

1.

CHECK RUBBER TUBE

1. Turn ignition switch OFF.

2. Disconnect rubber tube connected to EVAP canister vent control

valve (3).

-

Fuel filler pipe (top of frame view) (1)

-

EVAP control system pressure sensor (2)

-

EVAP canister (4)

-

Drain filter (5)

-

: Vehicle front

3. Check the rubber tube for clogging.
OK or NG

OK

>> GO TO 2.

NG

>> Clean rubber tube using an air blower.

2.

CHECK DRAIN FILTER

Refer to 

EC-734, "Component Inspection"

.

OK or NG

OK

>> GO TO 3.

NG

>> Replace drain filter.

3.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-734, "Component Inspection"

.

OK or NG

OK

>> GO TO 4.

NG

>> Replace EVAP canister vent control valve.

4.

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

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

attached.

JMBIA1516GB

AWBIA0134ZZ

2010 Pathfinder

EC-734

< COMPONENT DIAGNOSIS >

[VK56DE]

P0448 EVAP CANISTER VENT CONTROL VALVE

2. Check if water will drain from the EVAP canister.
Yes or No

Yes

>> GO TO 5.

No

>> GO TO 7.

5.

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

>> GO TO 7.

NG

>> GO TO 6.

6.

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.

7.

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 8.

NG

>> Replace EVAP control system pressure sensor.

8.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-739, "Component Inspection"

.

OK or NG

OK

>> GO TO 9.

NG

>> Replace EVAP control system pressure sensor.

9.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

>>

INSPECTION END

Component Inspection

INFOID:0000000005257701

EVAP CANISTER VENT CONTROL VALVE

 With CONSULT-III

1. Remove EVAP canister vent control valve from EVAP canister.

BBIA0558E

Water should not exist.

2010 Pathfinder

P0448 EVAP CANISTER VENT CONTROL VALVE

EC-735

< COMPONENT DIAGNOSIS >

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2. Check portion B of EVAP canister vent control valve for being

rusted.

If NG, replace EVAP canister vent control valve.

If OK, go to next step.

3. Reconnect harness connectors disconnected.
4. Turn ignition switch ON.
5. Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.
6. Check air passage continuity and operation delay time.

Check that new O-ring is installed properly.

Operation takes less than 1 second.

If NG, go to next step.

7. Clean the air passage (portion A to B) of EVAP canister vent control valve using an air blower.
8. Perform step 6 again.
9. If NG, replace EVAP canister vent control valve.

 Without CONSULT-III

1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion B of EVAP canister vent control valve for rust.

3. Check air passage continuity and operation delay time under the

following conditions.

Check that new O-ring is installed properly.

Operation takes less than 1 second.

If NG, go to next step.

4. Clean the air passage (portion A to B) of EVAP canister vent

control valve using an air blower.

5. Perform step 3 again.
6. If NG, replace EVAP canister vent control valve.

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.

VENT CONTROL/V Condition

Air passage continuity between A and B

ON

No

OFF

Yes

PBIB1033E

PBIB1033E

Condition

Air passage continuity between A and B

12V direct current supply between
 terminals 1 and 2

No

OFF

Yes

PBIB1034E

2010 Pathfinder

EC-736

< COMPONENT DIAGNOSIS >

[VK56DE]

P0448 EVAP CANISTER VENT CONTROL VALVE

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.

PBIB3641E

2010 Pathfinder

P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-737

< COMPONENT DIAGNOSIS >

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P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR

Component Description

INFOID:0000000005257702

The EVAP control system pressure sensor (2) detects pressure in

the purge line. The sensor output voltage to the ECM increases as

pressure increases.

• Fuel filler pipe (top of frame view) (1)

• EVAP canister vent control valve (3)

• EVAP canister (4)

• Drain filter (5)
•

: Vehicle front

On Board Diagnosis Logic

INFOID:0000000005257703

NOTE:

If DTC P0451 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to

EC-784, "DTC Confirmation Procedure"

.

DTC Confirmation Procedure

INFOID:0000000005257704

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 Confirmation Procedure when the fuel level is between 1/4 and 3/4 full, and vehicle is

placed on flat level surface.

1. Start engine and wait at least 100 seconds.

NOTE:

Do not depress accelerator pedal even slightly.

2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to 

EC-738, "Diagnosis Procedure"

.

If 1st trip DTC is not detected, go to the next step.

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.

AWBIA0134ZZ

PBIB3370E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0451
0451

EVAP control system pressure 
sensor performance

ECM detects a sloshing signal from the 
EVAP control system pressure sensor

• Harness or connectors
• EVAP control system pressure sensor

2010 Pathfinder

EC-738

< COMPONENT DIAGNOSIS >

[VK56DE]

P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR

7. Start engine and wait at least 100 seconds.

NOTE:

Do not depress accelerator pedal even slightly.

8. Check 1st trip DTC.
9. If 1st trip DTC is detected, go to 

EC-738, "Diagnosis Procedure"

.

If 1st trip DTC is not detected, go to the next step.

10. Turn ignition switch OFF and wait at least 10 seconds.
11. Turn ignition switch ON.
12. Turn ignition switch OFF and wait at least 10 seconds.
13. Start engine and wait at least 100 seconds.

NOTE:

Do not depress accelerator pedal even slightly.

14. Check 1st trip DTC.
15. If 1st trip DTC is detected, go to 

EC-738, "Diagnosis Procedure"

.

If 1st trip DTC is not detected, go to the next step.

16. Turn ignition switch OFF and wait at least 10 seconds.
17. Turn ignition switch ON.
18. Turn ignition switch OFF and wait at least 10 seconds.
19. Start engine and wait at least 100 seconds.

NOTE:

Do not depress accelerator pedal even slightly.

20. Check 1st trip DTC.
21. If 1st trip DTC is detected, go to 

EC-738, "Diagnosis Procedure"

.

If 1st trip DTC is not detected, go to the next step.

22. Turn ignition switch OFF and wait at least 10 seconds.
23. Turn ignition switch ON.
24. Turn ignition switch OFF and wait at least 10 seconds.
25. Start engine and wait at least 100 seconds.

NOTE:

Do not depress accelerator pedal even slightly.

26. Check 1st trip DTC.
27. If 1st trip DTC is detected, go to 

EC-738, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005257705

1.

CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.

2. Loosen and retighten ground screws on the body.

Refer to 

EC-577, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER

BBIA0539E

2010 Pathfinder

P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-739

< COMPONENT DIAGNOSIS >

[VK56DE]

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1. Disconnect EVAP control system pressure sensor (2) harness

connector.

-

Fuel filler pipe (top of frame view) (1)

-

EVAP canister vent control valve (3)

-

EVAP canister (4)

-

Drain filter (5)

-

: Vehicle front

2. Check sensor harness connector for water.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness connector.

3.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-739, "Component Inspection"

.

OK or NG

OK

>> GO TO 4.

NG 

>> Replace EVAP control system pressure sensor.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

>>

INSPECTION END

Component Inspection

INFOID:0000000005257706

EVAP CONTROL SYSTEM PRESSURE SENSOR

1. Remove EVAP control system pressure sensor with its harness connector.

Always replace O-ring with a new one.

2. Install a vacuum pump to EVAP control system pressure sensor.
3. Turn ignition switch ON and check output voltage between ECM

terminal 32 and ground under the following conditions.

CAUTION:

• Always calibrate the vacuum pump gauge when using it.
• Never apply below -93.3 kPa (-0.952 kg/cm

2

, -13.53 psi) or

pressure over 101.3 kPa (1.033 kg/cm

2

, 14.69 psi).

4. If NG, replace EVAP control system pressure sensor.

Water should not exist.

AWBIA0134ZZ

Applied vacuum

[kPa (kg/cm

2

, psi)]

Voltage

Not applied

1.8 - 4.8 V

-26.7 (-0.272, -3.87)

2.1 to 2.5 V lower than above value

PBIB1173E

2010 Pathfinder

 

 

 

 

 

 

 

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