Nissan Pathfinder (2011 year). Instruction — part 275
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-III
1. Turn ignition switch OFF and then ON.
2. Select “VENT CONTROL/V” in “ACTIVE TEST” mode with CONSULT-III.
3. Touch “ON/OFF” on CONSULT-III 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-III 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.
2011 Pathfinder
P0447 EVAP CANISTER VENT CONTROL VALVE
EC-255
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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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
EC-255, "Component Inspection"
OK or NG
OK
>> GO TO 9.
NG
>> Replace drain filter. Refer to
.
9.
CHECK EVAP CANISTER VENT CONTROL VALVE
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
GI-37, "Intermittent Incident"
.
>>
INSPECTION END
Component Inspection
INFOID:0000000006243950
EVAP CANISTER VENT CONTROL VALVE
With CONSULT-III
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
2011 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-III
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
.
PBIB1033E
Condition
Air passage continuity
between (A) and (B)
12V direct current supply between
terminals 1 and 2
No
OFF
Yes
PBIB1034E
PBIB3641E
2011 Pathfinder
P0448 EVAP CANISTER VENT CONTROL VALVE
EC-257
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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P0448 EVAP CANISTER VENT CONTROL VALVE
Component Description
INFOID:0000000006243951
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:0000000006243952
DTC Confirmation Procedure
INFOID:0000000006243953
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.
WITH CONSULT-III
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-III.
4. Start engine and let it idle for at least 1 minute.
5. Repeat next procedures 3 times.
PBIB3642E
AWBIA0134ZZ
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
• Drain filter
• EVAP canister is saturated with water
2011 Pathfinder
EC-258
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
P0448 EVAP CANISTER VENT CONTROL VALVE
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.
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to
If 1st trip DTC is not detected, go to the next step.
8. Repeat next procedure 20 times.
a. Quickly increase the engine speed between 4,000 and 4,500 rpm or more and 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
WITH GST
Follow the procedure “WITH CONSULT-III” above.
Diagnosis Procedure
INFOID:0000000006243954
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
EC-255, "Component Inspection"
OK or NG
OK
>> GO TO 3.
NG
>> Replace drain filter. Refer to
.
3.
CHECK EVAP CANISTER VENT CONTROL VALVE
EC-259, "Component Inspection"
OK or NG
OK
>> GO TO 4.
NG
>> Replace EVAP canister vent control valve. Refer to
FL-16, "Removal and Installation"
.
4.
CHECK IF EVAP CANISTER SATURATED IS WITH WATER
JMBIA1516GB
AWBIA0134ZZ
2011 Pathfinder
P0448 EVAP CANISTER VENT CONTROL VALVE
EC-259
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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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 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. Refer to
FL-16, "Removal and Installation"
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. Refer to
FL-16, "Removal and Installation"
.
8.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-268, "Component Inspection"
OK or NG
OK
>> GO TO 9.
NG
>> Replace EVAP control system pressure sensor. Refer to
FL-16, "Removal and Installation"
.
9.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
.
>>
INSPECTION END
Component Inspection
INFOID:0000000006243955
EVAP CANISTER VENT CONTROL VALVE
With CONSULT-III
1. Remove EVAP canister vent control valve from EVAP canister. Refer to
FL-16, "Removal and Installation"
.
BBIA0558E
Water should not exist.
2011 Pathfinder
EC-260
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
P0448 EVAP CANISTER VENT CONTROL VALVE
2. Check portionof
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.
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. Refer to
FL-16, "Removal and Installation"
Without CONSULT-III
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 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"
PBIB1033E
Condition VENT CONTROL/V
Air passage continuity
between (A) and (B)
ON
No
OFF
Yes
PBIB1033E
Condition
Air passage continuity
between (A) and (B)
12V direct current supply between
terminals 1 and 2
No
OFF
Yes
PBIB1034E
2011 Pathfinder
P0448 EVAP CANISTER VENT CONTROL VALVE
EC-261
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
C
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EC
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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
.
PBIB3641E
2011 Pathfinder
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