Nissan Pathfinder (2007 year). Manual - part 193

DTC P0447 EVAP CANISTER VENT CONTROL VALVE

EC-411

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2007 Pathfinder

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.
Make sure 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-412

DTC P0448 EVAP CANISTER VENT CONTROL VALVE

2007 Pathfinder

DTC P0448 EVAP CANISTER VENT CONTROL VALVE

PFP:16935

Component Description

UBS00KFO

The EVAP canister vent control valve is located on the EVAP canis-
ter 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.

CONSULT-II Reference Value in Data Monitor Mode

UBS00KFP

Specification data are reference values.

On Board Diagnosis Logic

UBS00KFQ

PBIB1263E

BBIA0551E

MONITOR ITEM

CONDITION

SPECIFICATION

VENT CONT/V

●

Ignition switch: ON

OFF

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0448
0448

EVAP canister vent con-
trol 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

DTC P0448 EVAP CANISTER VENT CONTROL VALVE

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DTC Confirmation Procedure

UBS00KFR

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-II

1.

Turn ignition switch ON and wait at least 5 seconds.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.

4.

Start engine and let it idle for at least 1 minute. 

5.

Repeat next procedures 3 times.

a.

Increase the engine speed up to 3,000 to 3,500 rpm and keep it
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.

6.

If 1st trip DTC is detected, go to 

EC-415, "Diagnostic Procedure"

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

7.

Repeat next procedure 20 times.

a.

Quickly increase the engine speed up to 4,000 to 4,500 rpm or more and keep it for 25 to 30 seconds.

b.

Fully released accelerator pedal and keep engine idle for at least 35 seconds.

8.

If 1st trip DTC is detected, go to 

EC-415, "Diagnostic Procedure"

  .

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

SEF058Y

PBIB0972E

EC-414

DTC P0448 EVAP CANISTER VENT CONTROL VALVE

2007 Pathfinder

Wiring Diagram

UBS00KFS

BBWA1755E

DTC P0448 EVAP CANISTER VENT CONTROL VALVE

EC-415

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2007 Pathfinder

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

UBS00KFT

1. 

CHECK RUBBER TUBE

1.

Turn ignition switch OFF.

2.

Disconnect rubber tube connected to EVAP canister vent control
valve.

3.

Check the rubber tube for clogging.

OK or NG

OK

>> GO TO 2.

NG

>> Clean rubber tube using an air blower.

2. 

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-416, "Component Inspection"

  .

OK or NG

OK

>> GO TO 3.

NG

>> Replace EVAP canister vent control valve.

3. 

CHECK IF EVAP CANISTER SATURATED WITH WATER

1.

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

2.

Check if water will drain from the EVAP canister.

Yes or No

Yes

>> GO TO 4.

No

>> GO TO 6.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

111

BR

ECM relay
(Self shut-off)

[Engine is running]
[Ignition switch: OFF]

●

For a few seconds after turning ignition 
switch OFF

0 - 1.5V

[Ignition switch: OFF]

●

More than a few seconds after turning igni-
tion switch OFF

BATTERY VOLTAGE
(11 - 14V)

117

G

EVAP canister vent control 
valve

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

BBIA0551E

BBIA0558E

EC-416

DTC P0448 EVAP CANISTER VENT CONTROL VALVE

2007 Pathfinder

4. 

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 6.

NG

>> GO TO 5.

5. 

DETECT MALFUNCTIONING PART

Check the following.

●

EVAP canister for damage

●

EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

>> Repair hose or replace EVAP canister.

6. 

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 7.

NG

>> Replace EVAP control system pressure sensor.

7. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-426, "Component Inspection"

  .

OK or NG

OK

>> GO TO 8.

NG

>> Replace EVAP control system pressure sensor.

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

  .

>> INSPECTION END

Component Inspection

UBS00KFU

EVAP CANISTER VENT CONTROL VALVE

 With CONSULT-II

1.

Remove EVAP canister vent control valve from EVAP canister.

2.

Check portion  of B   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.

Water should not exist.

PBIB1033E

DTC P0448 EVAP CANISTER VENT CONTROL VALVE

EC-417

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5.

Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.

6.

Check air passage continuity and operation delay time.
Make sure 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.

8.

Perform step 6 again.

 Without CONSULT-II

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.
Make sure 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.

Condition VENT CONTROL/V

Air passage continuity

 between (A) and (B)

ON

No

OFF

Yes

PBIB1679E

PBIB1033E

Condition

Air passage continuity

 between (A) and (B)

12V direct current supply between
 terminals 1 and 2

No

OFF

Yes

PBIB1034E

EC-418

DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR

2007 Pathfinder

DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR

PFP:22365

Component Description

UBS00K9L

The EVAP control system pressure sensor detects pressure in the
purge line. The sensor output voltage to the ECM increases as pres-
sure increases.

CONSULT-II Reference Value in Data Monitor Mode

UBS00K9M

Specification data are reference values.

On Board Diagnosis Logic

UBS00K9N

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

EC-475, "DTC P0643 SENSOR POWER SUPPLY"

  .

BBIA0551E

PBIB1207E

MONITOR ITEM

CONDITION

SPECIFICATION

EVAP SYS PRES

●

Ignition switch: ON

Approx. 1.8 - 4.8V

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0451
0451

EVAP control system 
pressure sensor perfor-
mance

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

●

Harness or connectors

●

EVAP control system pressure sensor