Nissan Frontier. Manual - part 430

 

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Nissan Frontier. Manual - part 430

 

 

P0447 EVAP CANISTER VENT CONTROL VALVE

EC-291

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Yes

>> GO TO 2.

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 (1) harness con-

nector.

- EVAP control system pressure sensor (2)

- Drain filter (3)

- EVAP canister (4)
- 

: 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

• IPDM E/R harness connector E119

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

>> Repair open circuit, short to ground or short to power in 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 109 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.

ALBIA0514ZZ

Voltage: Battery voltage

PBIB0152E

Continuity should exist.

EC-292

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0447 EVAP CANISTER VENT CONTROL VALVE

NG

>> GO TO 6.

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, 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 EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-292, "Component Inspection"

.

OK or NG

OK

>> GO TO 9.

NG

>> Replace EVAP canister vent control valve. Refer to 

FL-14, "Removal and Installation"

.

9.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009480953

EVAP CANISTER VENT CONTROL VALVE

 With CONSULT

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

If OK, go to next step.

7. Clean the air passage (Portion A to B) of EVAP canister vent control valve using an air blower.

PBIB1033E

Condition VENT CONTROL/V

Air passage continuity between A and B

ON

No

OFF

Yes

P0447 EVAP CANISTER VENT CONTROL VALVE

EC-293

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

C

D

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EC

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O

8. Perform step 6 again.

 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, replace EVAP canister vent control valve.

If OK, 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.

PBIB1033E

Condition

Air passage continuity between A and B

12V direct current supply between
 terminals 1 and 2

No

OFF

Yes

PBIB1034E

EC-294

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0448 EVAP CANISTER VENT CONTROL VALVE

P0448 EVAP CANISTER VENT CONTROL VALVE

Component Description

INFOID:0000000009480954

The EVAP canister vent control valve (1) is located on the EVAP canister (4) and is used to seal the canister

vent.

• EVAP control system pressure sensor (2)

• Drain filter (3)
•

: 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” diagnoses.

On Board Diagnosis Logic

INFOID:0000000009480955

DTC Confirmation Procedure

INFOID:0000000009480956

NOTE:

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at

least 10 seconds before conducting the next test.

 WITH CONSULT

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

seconds to 3 minutes.

Never exceed 3 minutes.

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

EC-295, "Diagnosis Procedure"

.

ALBIA0514ZZ

PBIB1263E

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

• EVAP canister is saturated with water

 

 

 

 

 

 

 

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