Nissan Pathfinder (2012 year). Manual - part 271

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-249

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Check air passage continuity of EVAP canister purge volume control

solenoid valve under the following conditions.

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.
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. Refer to 

EC-57, "Description"

.

Condition

Air passage continuity 

between (A) and (B)

12V direct current supply between 
terminals 1 and 2

Yes

No supply

No

PBIB2059E

PBIB3641E

August 2012

2012 Pathfinder

EC-250

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE

Description

INFOID:0000000007358160

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:0000000007358161

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

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0444
0444

EVAP canister purge volume 
control solenoid valve circuit 
open

An excessively low voltage signal is sent 
to ECM through the valve

• Harness or connectors

(The solenoid valve circuit is open or 
shorted.)

• EVAP canister purge volume control so-

lenoid valve

P0445
0445

EVAP canister purge volume 
control solenoid valve circuit 
shorted

An excessively high voltage signal is sent 
to ECM through the valve

• Harness or connectors

(The solenoid valve circuit is shorted.)

• EVAP canister purge volume control so-

lenoid valve

August 2012

2012 Pathfinder

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

EC-251

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DTC Confirmation Procedure

INFOID:0000000007358162

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.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm battery voltage is more than 11V at idle.

1. Start engine and let it idle for at least 13 seconds.

2. Check 1st trip DTC.

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

EC-251, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007358163

1.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect EVAP canister purge volume control solenoid valve

harness connector.

3. Turn ignition switch ON.

4. Check voltage between EVAP canister purge volume control

solenoid valve terminal 2 and ground with CONSULT or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E2, F32

• Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R

• Harness for open or short between EVAP canister purge volume control solenoid valve and ECM

>> Repair harness or connectors.

3.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT

FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between ECM terminal 45 and EVAP canister purge volume control solenoid

valve terminal 1. Refer to Wiring Diagram.

BBIA0550E

Voltage: Battery voltage

PBIB2605E

Continuity should exist.

August 2012

2012 Pathfinder

EC-252

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

4. Also check harness for short to ground and short to power.
OK or NG

OK (With CONSULT)>>GO TO 4.

OK (Without CONSULT)>>GO TO 5.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

4.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

 

With CONSULT

1. Reconnect all harness connectors disconnected.

2. Start engine.

3. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT. Check that engine speed varies

according to the valve opening.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

5.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-252, "Component Inspection"

.

OK or NG

OK

>> GO TO 6.

NG

>> Replace EVAP canister purge volume control solenoid valve. Refer to 

EM-27, "Exploded View"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

>>

INSPECTION END

Component Inspection

INFOID:0000000007358164

EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

 With CONSULT

Check air passage continuity of EVAP canister purge volume control

solenoid valve under the following conditions.

 Without CONSULT

Check air passage continuity of EVAP canister purge volume control

solenoid valve under the following conditions.

Condition

(PURG VOL CONT/V value)

Air passage continuity 

between (A) and (B)

100%

Yes

0%

No

PBIB2058E

Condition

Air passage continuity 

between (A) and (B)

12V direct current supply between 
terminals 1 and 2

Yes

No supply

No

PBIB2059E

August 2012

2012 Pathfinder

P0447 EVAP CANISTER VENT CONTROL VALVE

EC-253

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P0447 EVAP CANISTER VENT CONTROL VALVE

Component Description

INFOID:0000000007358165

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

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

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.

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

• EVAP control system pressure sensor (2)

• Drain filter (5)
•

: Vehicle front

On Board Diagnosis Logic

INFOID:0000000007358166

DTC Confirmation Procedure

INFOID:0000000007358167

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.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm battery voltage is more than 11V at idle.

1. Start engine and wait at least 8 seconds.

2. Check 1st trip DTC.

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

EC-253, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007358168

1.

INSPECTION START

Do you have CONSULT?
Yes or No

Yes

>> GO TO 2.

PBIB3642E

AWBIA0134ZZ

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0447
0447

EVAP canister vent con-
trol valve circuit open

An improper voltage signal is sent to ECM 
through EVAP canister vent control valve.

• Harness or connectors

(The valve circuit is open or shorted.)

• EVAP canister vent control valve
• Drain filter

August 2012

2012 Pathfinder

EC-254

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0447 EVAP CANISTER VENT CONTROL VALVE

No

>> GO TO 3.

2.

CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT

With CONSULT

1. Turn ignition switch OFF and then ON.

2. Select “VENT CONTROL/V” in “ACTIVE TEST” mode with CONSULT.

3. Touch “ON/OFF” on CONSULT screen.

4. Check for operating sound of the valve.

Clicking noise should be heard.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 3.

3.

CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect EVAP canister vent control valve (3) harness con-

nector.

-

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

-

EVAP control system pressure sensor (2)

-

EVAP canister (4)

-

Drain filter (5)

-

: Vehicle front

3. Turn ignition switch ON.

4. Check voltage between EVAP canister vent control valve termi-

nal 1 and ground with CONSULT or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E41, C1

• Harness for open or short between EVAP canister vent control valve and IPDM E/R

>> Repair harness or connectors.

5.

CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between ECM terminal 117 and EVAP canister vent control valve terminal 2.

Refer to Wiring Diagram.

4. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

AWBIA0134ZZ

Voltage: Battery voltage

PBIB0152E

Continuity should exist.

August 2012

2012 Pathfinder

P0447 EVAP CANISTER VENT CONTROL VALVE

EC-255

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6.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors C1, E41

• Harness for open or short between EVAP canister vent control valve and ECM

>> Repair open circuit or short to ground or short to power in harness or connectors.

7.

CHECK RUBBER TUBE FOR CLOGGING

1. Disconnect rubber tube connected to EVAP canister vent control valve.

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

OK

>> GO TO 8.

NG

>> Clean the rubber tube using an air blower.

8.

CHECK DRAIN FILTER

Refer to 

EC-255, "Component Inspection"

.

OK or NG

OK

>> GO TO 9.

NG

>> Replace drain filter. Refer to 

EC-57, "Description"

.

9.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-255, "Component Inspection"

.

OK or NG

OK

>> GO TO 10.

NG

>> Replace EVAP canister vent control valve. Refer to 

FL-16, "Removal and Installation"

.

10.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

>>

INSPECTION END

Component Inspection

INFOID:0000000007358169

EVAP CANISTER VENT CONTROL VALVE

 With CONSULT

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

FL-16, "Removal and Installation"

.

2. Check portion 

B

of EVAP canister vent control valve for rust.

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.

Condition VENT CONTROL/V

Air passage continuity

 between (A) and (B)

ON

No

OFF

Yes

PBIB1033E

August 2012

2012 Pathfinder

EC-256

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0447 EVAP CANISTER VENT CONTROL VALVE

9. If NG, replace EVAP canister vent control valve. Refer to 

FL-16, "Removal and Installation"

.

 Without CONSULT

1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion 

B

 of EVAP canister vent control valve for being

rusted.

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. Refer to 

FL-16, "Removal and Installation"

.

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.
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. Refer to 

EC-57, "Description"

.

PBIB1033E

Condition

Air passage continuity

 between (A) and (B)

12V direct current supply between
 terminals 1 and 2

No

OFF

Yes

PBIB1034E

PBIB3641E

August 2012

2012 Pathfinder