Nissan Pathfinder (2010 year). Instruction — part 333
EC-756
< COMPONENT DIAGNOSIS >
[VK56DE]
P0456 EVAP CONTROL SYSTEM
P0456 EVAP CONTROL SYSTEM
On Board Diagnosis Logic
INFOID:0000000005257721
This diagnosis detects very small leaks in the EVAP line between fuel tank and EVAP canister purge volume
control solenoid valve, using the negative pressure.
If ECM judges a leak which corresponds to a very small leak, the very small leak P0456 will be detected.
If ECM judges a leak equivalent to a small leak, EVAP small leak P0442 will be detected.
If ECM judges that there are no leaks, the diagnosis will be OK.
CAUTION:
• Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the
MIL may illuminate.
• If the fuel filler cap is not tightened properly, the MIL may illuminate.
• Use only a genuine NISSAN rubber tube as a replacement.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0456
0456
Evaporative emission
control system very
small leak (negative
pressure check)
• EVAP system has a very small
leak.
• EVAP system does not operate
properly.
• Incorrect fuel tank vacuum relief valve
• Incorrect fuel filler cap used
• Fuel filler cap remains open or does not close
• Foreign matter caught in fuel filler cap
• Leak is in line between intake manifold and EVAP can-
ister purge volume control solenoid valve
• Foreign matter caught in EVAP canister vent control
valve
• EVAP canister or fuel tank leaks
• EVAP purge line (pipe and rubber tube) leaks
• EVAP purge line rubber tube bent
• Loose or disconnected rubber tube
• EVAP canister vent control valve and the circuit
• EVAP canister purge volume control solenoid valve
and the circuit
• Fuel tank temperature sensor
• Drain filter
• O-ring of EVAP canister vent control valve is missing or
damaged
• EVAP canister is saturated with water
• EVAP control system pressure sensor
• Refueling EVAP vapor cut valve
• ORVR system leaks
• Fuel level sensor and the circuit
• Foreign matter caught in EVAP canister purge volume
control solenoid valve
PBIB3640E
2010 Pathfinder
P0456 EVAP CONTROL SYSTEM
EC-757
< COMPONENT DIAGNOSIS >
[VK56DE]
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DTC Confirmation Procedure
INFOID:0000000005257722
NOTE:
•
If DTC P0456 is displayed with P0442, first perform the trouble diagnosis for DTC P0456.
•
Check that EVAP hoses are connected to EVAP canister purge volume control solenoid valve prop-
erly.
•
After repair, check that the hoses and clips are installed properly.
• 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:
•
Open engine hood before conducting the following procedure.
•
If any of following conditions are met just before the DTC confirmation procedure, leave the vehicle
for more than 1 hour.
-
Fuel filler cap is removed.
-
Fuel is refilled or drained.
-
EVAP component part/parts is/are removed.
•
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2. Check that the following conditions are met.
FUEL LEVEL SE: 0.25 - 1.4 V
COOLAN TEMP/S: 0 - 32
°
C (32 - 90
°
F)
FUEL T/TMP SE: 0 - 35
°
C (32 - 95
°
F)
INT/A TEMP SE: More than 0
°
C (32
°
F)
If NG, turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle), or refill/drain fuel
until the output voltage of the “FUEL LEVEL SE” meets within the range above and leave the vehicle for
more than 1 hour. Then start from step 1.
3. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
4. Select “EVP V/S LEAK P0456/P1456” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-III.
Follow the instructions displayed.
5. Check that “OK” is displayed.
If “NG” is displayed, go to
.
NOTE:
•
If the engine speed cannot be maintained within the range displayed on CONSULT-III screen, go
to
.
Overall Function Check
INFOID:0000000005257723
WITH GST
Use this procedure to check the overall function of the EVAP very small leak function. During this check, a 1st
trip DTC might not be confirmed.
CAUTION:
• Never use compressed air, doing so may damage the EVAP system.
• Never start engine.
• Never exceeded 4.12 kPa (0.042 kg/cm
2
, 0.6 psi).
2010 Pathfinder
EC-758
< COMPONENT DIAGNOSIS >
[VK56DE]
P0456 EVAP CONTROL SYSTEM
1. Attach the EVAP service port adapter (commercial service tool)
securely to the EVAP service port (2).
-
EVAP canister purge volume control solenoid valve (1)
-
: Vehicle front
2. Set the pressure pump and a hose.
3. Also set a vacuum gauge via 3-way connector and a hose.
4. Turn ignition switch ON.
5. Connect GST and select Service $08.
6. Using Service $08, control the EVAP canister vent control valve
(close).
NOTE:
For more information, refer to GST Instruction Instruction.
7. Apply pressure and check that the following conditions are satis-
fied.
Pressure to be applied: 2.7 kPa (0.028 kg/cm
2
, 0.39 psi)
Time to be waited after the pressure drawn in to the EVAP
system and the pressure to be dropped: 60 seconds and the pressure should not be dropped
more than 0.4 kPa (0.004 kg/cm
2
, 0.06 psi).
If NG, go to
If OK, go to next step.
8. Disconnect GST.
9. Start engine and warm it up to normal operating temperature.
10. Turn ignition switch OFF and wait at least 10 seconds.
11. Restart engine and let it idle for 90 seconds.
12. Keep engine speed at 2,000 rpm for 30 seconds.
13. Turn ignition switch OFF.
Diagnosis Procedure
INFOID:0000000005257724
1.
CHECK FUEL FILLER CAP DESIGN
1. Turn ignition switch OFF.
2. Check for genuine NISSAN fuel filler cap design.
OK or NG
OK
>> GO TO 2.
NG
>> Replace with genuine NISSAN fuel filler cap.
2.
CHECK FUEL FILLER CAP INSTALLATION
Check that the fuel filler cap is tightened properly by rotating the cap clockwise.
OK or NG
OK
>> GO TO 3.
NG
>> 1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
2. Retighten until ratcheting sound is heard.
3.
CHECK FUEL FILLER CAP FUNCTION
ALBIA0349ZZ
SEF462UI
SEF915U
2010 Pathfinder
P0456 EVAP CONTROL SYSTEM
EC-759
< COMPONENT DIAGNOSIS >
[VK56DE]
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Check for air releasing sound while opening the fuel filler cap.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
CHECK FUEL TANK VACUUM RELIEF VALVE
OK or NG
OK
>> GO TO 5.
NG
>> Replace fuel filler cap with a genuine one.
5.
INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter (commer-
cial service tool) and pressure pump to EVAP service port (2)
securely.
NOTE:
Improper installation of the EVAP service port adapter (com-
mercial service tool) to the EVAP service port may cause leak-
ing.
• EVAP canister purge volume control solenoid valve (1)
•
: Vehicle front
With CONSULT-III>>GO TO 6.
Without CONSULT-III>>GO TO 7.
6.
CHECK FOR EVAP LEAK
With CONSULT-III
1. Turn ignition switch ON.
2. Select “EVAP SYSTEM CLOSE” of “WORK SUPPORT” mode with CONSULT-III.
3. Touch “START” and apply pressure into the EVAP line until the pressure indicator reaches the middle of
the bar graph.
CAUTION:
• Never use compressed air or a high pressure pump.
• Never exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pressure in the system.
ALBIA0349ZZ
SEF916U
2010 Pathfinder
EC-760
< COMPONENT DIAGNOSIS >
[VK56DE]
P0456 EVAP CONTROL SYSTEM
4. Using EVAP leak detector (commercial service tool), locate the
EVAP leak. For the leak detector (commercial service tool), refer
to the instruction instruction for more details.
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace malfunctioning part.
7.
CHECK FOR EVAP LEAK
Without CONSULT-III
1. Turn ignition switch OFF.
2. Apply 12 volts DC to EVAP canister vent control valve (3). The
valve will close. (Continue to apply 12 volts until the end of test.)
-
Fuel filler pipe (top of frame view) (1)
-
EVAP control system pressure sensor (2)
-
EVAP canister (4)
-
Drain filter (5)
-
: Vehicle front
3. Pressurize the EVAP line using pressure pump with 1.38 to 2.76
kPa (0.014 to 0.028 kg/cm
2
, 0.2 to 0.4 psi), then remove pump
and EVAP service port adapter (commercial service tool).
CAUTION:
• Never use compressed air or a high pressure pump.
• Never exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pressure in the system.
4. Using EVAP leak detector (commercial service tool), locate the
EVAP leak. For the leak detector (commercial service tool), refer
to the instruction instruction for more details.
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace malfunctioning part.
8.
CHECK DRAIN FILTER
EC-763, "Component Inspection"
OK or NG
OK
>> GO TO 9.
NG
>> Replace drain filter.
9.
CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
• EVAP canister vent control valve is installed properly.
EC-962, "Removal and Installation"
.
• EVAP canister vent control valve.
EC-730, "Component Inspection"
.
OK or NG
OK
>> GO TO 10.
NG
>> Repair or replace EVAP canister vent control valve and O-ring.
10.
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.
SEF200U
AWBIA0134ZZ
SEF200U
2010 Pathfinder
P0456 EVAP CONTROL SYSTEM
EC-761
< COMPONENT DIAGNOSIS >
[VK56DE]
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2. Does water drain from the EVAP canister?
Yes or No
Yes
>> GO TO 11.
No (With CONSULT-III)>>GO TO 13.
No (Without CONSULT-III)>>GO TO 14.
11.
CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.
OK or NG
OK (With CONSULT-III)>>GO TO 13.
OK (Without CONSULT-III)>>GO TO 14.
NG
>> GO TO 12.
12.
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.
13.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-III
1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve and EVAP
service port from EVAP service port.
2. Start engine.
3. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode.
4. Touch “Qu” on CONSULT-III screen to increase “PURG VOL C/V” opening to 100%.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
OK or NG
OK
>> GO TO 16.
NG
>> GO TO 15.
14.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve and EVAP
service port from EVAP service port.
4. Start engine and let it idle for at least 80 seconds.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
OK or NG
OK
>> GO TO 17.
NG
>> GO TO 15.
BBIA0558E
SWB models:
The weight should be less than 2.5 kg (5.5 lb).
LWB models:
The weight should be less than 3.2 kg (7.1 lb).
Vacuum should exist.
Vacuum should exist.
2010 Pathfinder
EC-762
< COMPONENT DIAGNOSIS >
[VK56DE]
P0456 EVAP CONTROL SYSTEM
15.
CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. Refer to
.
OK or NG
OK
>> GO TO 16.
NG
>> Repair or reconnect the hose.
16.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-727, "Component Inspection"
OK or NG
OK
>> GO TO 17.
NG
>> Replace EVAP canister purge volume control solenoid valve.
17.
CHECK FUEL TANK TEMPERATURE SENSOR
EC-681, "Component Inspection"
OK or NG
OK
>> GO TO 18.
NG
>> Replace “fuel level sensor unit and fuel pump”.
18.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-739, "Component Inspection"
OK or NG
OK
>> GO TO 19.
NG
>> Replace EVAP control system pressure sensor.
19.
CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection.
.
OK or NG
OK
>> GO TO 20.
NG
>> Repair or reconnect the hose.
20.
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 21.
21.
CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper
connection. For location, refer to
.
OK or NG
OK
>> GO TO 22.
NG
>> Repair or replace hoses and tubes.
22.
CHECK RECIRCULATION LINE
Check recirculation line between filler neck tube and fuel tank for clogging, kinks, cracks, looseness and
improper connection.
OK or NG
OK
>> GO TO 23.
NG
>> Repair or replace hose, tube or filler neck tube.
23.
CHECK REFUELING EVAP VAPOR CUT VALVE
EC-889, "Component Inspection"
OK or NG
OK
>> GO TO 24.
NG
>> Replace refueling EVAP vapor cut valve with fuel tank.
2010 Pathfinder
P0456 EVAP CONTROL SYSTEM
EC-763
< COMPONENT DIAGNOSIS >
[VK56DE]
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24.
CHECK FUEL LEVEL SENSOR
.
OK or NG
OK
>> GO TO 25.
NG
>> Replace “fuel level sensor unit and fuel pump”.
25.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
.
>>
INSPECTION END
Component Inspection
INFOID:0000000005257725
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)
1. Wipe clean valve housing.
2. Check valve opening pressure and vacuum.
3. If out of specification, replace fuel filler cap as an assembly.
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incor-
rect fuel filler cap is used, the MIL may illuminate.
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.
SEF445Y
Pressure: 15.3 - 20.0 kPa (0.156 - 0.204 kg/cm
2
, 2.22 -
2.90 psi)
Vacuum:
−
6.0 to
−
3.3 kPa (
−
0.061 to
−
0.034 kg/cm
2
,
−
0.87 to
−
0.48 psi)
SEF943S
PBIB3641E
2010 Pathfinder
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