Nissan Pathfinder (2012 year). Manual - part 336

 

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Nissan Pathfinder (2012 year). Manual - part 336

 

 

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-769

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Description

INFOID:0000000007358634

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 via the 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 is used to

control the flow rate of fuel vapor from the EVAP canister. 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:0000000007358635

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 volume 
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

Unified meter control unit

Vehicle speed*

2

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.)

August 2012

2012 Pathfinder

EC-770

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

DTC Confirmation Procedure

INFOID:0000000007358636

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:

Always perform test at a temperature of 5

°

C (41

°

F) or more.

 WITH CONSULT

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. Turn ignition switch ON.
6. Select “PURG VOL CN/V P1444” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode with

CONSULT.

7. Touch “START”.
8. Start engine and let it idle until “TESTING” on CONSULT changes to “COMPLETED”. (It will take approxi-

mately 10 seconds.)

If “TESTING” is not displayed after 5 minutes, retry from step 2.

9. Check that “OK” is displayed after touching “SELF-DIAG RESULTS”.

If “NG” is displayed, go to 

EC-770, "Diagnosis Procedure"

.

 WITH GST

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 20 seconds.
6. Select Service $07 with GST.
7. If 1st trip DTC is detected, go to 

EC-770, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007358637

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

(1) harness connector.

-

EVAP service port (2)

-

: Vehicle front

3. Turn ignition switch ON.

ALBIA0349ZZ

August 2012

2012 Pathfinder

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-771

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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4. Check voltage between EVAP canister purge volume control

solenoid valve terminal 1 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

• IPDM E/R harness connector E119

• 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 2. Refer to Wiring Diagram.

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

OK

>> GO TO 4.

NG

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

4.

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 5.

NG

>> Replace EVAP control system pressure sensor. Refer to 

FL-16, "Removal and Installation"

.

5.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-788, "Component Inspection"

.

OK or NG

OK (With CONSULT)>>GO TO 6.

OK (Without CONSULT)>>GO TO 7.

NG

>> Replace EVAP control system pressure sensor. Refer to 

FL-16, "Removal and Installation"

.

6.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT

1. Turn ignition switch OFF.

2. Reconnect all harness connectors disconnected.

3. Start engine.

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

5. Check that engine speed varies according to the valve opening.

Voltage: Battery voltage

PBIB2245E

Continuity should exist.

Water should not exist.

August 2012

2012 Pathfinder

EC-772

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-773, "Component Inspection"

.

OK or NG

OK

>> GO TO 8.

NG

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

EM-165

.

8.

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 9.

NG

>> Clean the rubber tube using an air blower.

9.

CHECK DRAIN FILTER

Refer to 

EC-761, "Component Inspection"

.

OK or NG

OK

>> GO TO 10.

NG

>> Replace drain filter. Refer to 

EC-516

.

10.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-779, "Component Inspection"

.

OK or NG

OK

>> GO TO 11.

NG

>> Replace EVAP canister vent control valve. Refer to 

FL-16, "Removal and Installation"

.

11.

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. Refer to 

FL-16, "Removal and Installation"

.

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

Yes

>> GO TO 12.

No

>> GO TO 14.

12.

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 14.

NG

>> GO TO 13.

13.

DETECT MALFUNCTIONING PART

Check the following.

• EVAP canister for damage

• EVAP hose between EVAP canister and drain filter for clogging or poor connection

BBIA0558E

August 2012

2012 Pathfinder

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-773

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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>> Repair hose or replace EVAP canister. Refer to 

FL-16, "Removal and Installation"

.

14.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

>>

INSPECTION END

Component Inspection

INFOID:0000000007358638

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 C/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

EC-774

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE

Description

INFOID:0000000007358639

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 via the 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 is used to

control the flow rate of fuel vapor from the EVAP canister. 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:0000000007358640

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 volume 
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

Unified meter control unit

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 

solenoid 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 

solenoid valve

August 2012

2012 Pathfinder

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

EC-775

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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DTC Confirmation Procedure

INFOID:0000000007358641

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:

Before performing the following procedure, confirm battery voltage is more than 11 V 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-775, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007358642

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

(1) harness connector.

-

EVAP service port (2)

-

: Vehicle front

3. Turn ignition switch ON.

4. Check voltage between EVAP canister purge volume control

solenoid valve terminal 1 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

• IPDM E/R harness  connector E119

• 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 2. Refer to Wiring Diagram.

ALBIA0349ZZ

Voltage: Battery voltage

PBIB2245E

Continuity should exist.

August 2012

2012 Pathfinder

EC-776

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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-776, "Component Inspection"

.

OK or NG

OK

>> GO TO 6.

NG

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

EM-165

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

>>

INSPECTION END

Component Inspection

INFOID:0000000007358643

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 C/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

 

 

 

 

 

 

 

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