Nissan Pathfinder (2011 year). Manual — part 278
EC-278
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
P0455 EVAP CONTROL SYSTEM
4. Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction manual for more details. Refer
.
OK or NG
OK
>> GO TO 12.
NG
>> Repair or replace.
11.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-III
1. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at 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 CONT/V” opening to 100%.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
OK or NG
OK
>> GO TO 14.
NG
>> GO TO 13.
12.
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 to EVAP canister purge volume control solenoid valve at 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 15.
NG
>> GO TO 13.
13.
CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. Refer to
.
OK or NG
OK (With CONSULT-III)>>GO TO 14.
OK (Without CONSULT-III)>>GO TO 15.
NG
>> Repair or reconnect the hose.
14.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-III
1. Start engine.
2. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-III. Check that engine speed var-
ies according to the valve opening.
OK or NG
OK
>> GO TO 16.
NG
>> GO TO 15.
15.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-252, "Component Inspection"
OK or NG
OK
>> GO TO 16.
NG
>> Replace EVAP canister purge volume control solenoid valve. Refer to
SEF200U
Vacuum should exist.
2011 Pathfinder
P0455 EVAP CONTROL SYSTEM
EC-279
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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16.
CHECK FUEL TANK TEMPERATURE SENSOR
EC-201, "Component Inspection"
OK or NG
OK
>> GO TO 17.
NG
>> Replace fuel level sensor unit. Refer to
FL-11, "Removal and Installation"
17.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-268, "Component Inspection"
OK or NG
OK
>> GO TO 18.
NG
>> Replace EVAP control system pressure sensor. Refer to
FL-16, "Removal and Installation"
.
18.
CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kink, looseness and improper con-
nection. For location, refer to
OK or NG
OK
>> GO TO 19.
NG
>> Repair or replace hoses and tubes.
19.
CHECK RECIRCULATION LINE
Check recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, looseness and
improper connection.
OK or NG
OK
>> GO TO 20.
NG
>> Repair or replace hose, tube or filler neck tube.
20.
CHECK REFUELING EVAP VAPOR CUT VALVE
EC-416, "Component Inspection"
OK or NG
OK
>> GO TO 21.
NG
>> Replace refueling EVAP vapor cut valve with fuel tank. Refer to
FL-6, "Removal and Installation"
21.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
.
>>
INSPECTION END
Component Inspection
INFOID:0000000006243974
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)
1. Wipe clean valve housing.
SEF445Y
2011 Pathfinder
EC-280
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
P0455 EVAP CONTROL SYSTEM
2. Check valve opening pressure and vacuum.
3. If out of specification, replace fuel filler cap as an assembly.
FL-6, "Removal and Installation"
.
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incor-
rect fuel filler cap is used, the MIL may illuminate.
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
2011 Pathfinder
P0456 EVAP CONTROL SYSTEM
EC-281
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P0456 EVAP CONTROL SYSTEM
On Board Diagnosis Logic
INFOID:0000000006243975
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 prop-
erly.
• Incorrect fuel tank vacuum relief valve
• Incorrect fuel filler cap used
• Fuel filler cap remains open or fails to close.
• Foreign matter caught in fuel filler cap.
• Leak is in line between intake manifold and EVAP
canister purge volume control solenoid valve.
• Foreign matter caught in EVAP canister vent con-
trol 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
• O-ring of EVAP canister vent control valve is miss-
ing 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 vol-
ume control solenoid valve
PBIB3640E
2011 Pathfinder
EC-282
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
P0456 EVAP CONTROL SYSTEM
DTC Confirmation Procedure
INFOID:0000000006243976
NOTE:
•
If DTC P0456 is displayed with P0442, first perform trouble diagnosis for DTC P0456.
•
After repair, make sure that the hoses and clips are installed properly.
• If DTC Confirmation Procedure has been previously conducted, always perform the following before con-
ducting 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 11V 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 - 1.4V
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 and wait at least 10 seconds.
4. Turn ignition switch ON.
5. Select “EVP V/S LEAK P0456/P1456” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-III.
Follow the instructions displayed.
6. Check that “OK” is displayed.
If “NG” is displayed, refer to
.
NOTE:
•
If the engine speed cannot be maintained within the range displayed on CONSULT-III screen, go
to
•
Check that EVAP hoses are connected to EVAP canister purge volume control solenoid valve
properly.
Overall Function Check
INFOID:0000000006243977
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).
2011 Pathfinder
P0456 EVAP CONTROL SYSTEM
EC-283
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1. Attach the EVAP service port adapter securely to the EVAP ser-
vice port.
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).
7. Apply pressure and make sure the following conditions are sat-
isfied.
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. Turn ignition switch ON.
12. Turn ignition switch OFF and wait at least 10 seconds.
13. Restart engine and let it idle for 90 seconds.
14. Keep engine speed at 2,000 rpm for 30 seconds.
15. Turn ignition switch OFF.
NOTE:
For more information, refer to GST instruction manual.
Diagnosis Procedure
INFOID:0000000006243978
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. Refer to
FL-6, "Removal and Installation"
.
2.
CHECK FUEL FILLER CAP INSTALLATION
Check that the 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.
BBIA0550E
SEF462UI
SEF915U
2011 Pathfinder
EC-284
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
P0456 EVAP CONTROL SYSTEM
2. Retighten until ratcheting sound is heard.
3.
CHECK FUEL FILLER CAP FUNCTION
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
EC-243, "Component Inspection"
OK or NG
OK
>> GO TO 5.
NG
>> Replace fuel filler cap with a genuine one. Refer to
FL-6, "Removal and Installation"
.
5.
INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter and pres-
sure pump to EVAP service port securely. For the location of EVAP
service port, refer to
.
NOTE:
Improper installation of the EVAP service port adapter to the
EVAP service port may cause leaking.
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.
BBIA0550E
SEF916U
2011 Pathfinder
P0456 EVAP CONTROL SYSTEM
EC-285
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4. Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction manual for more details.
.
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace.
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.
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, locate the EVAP leak. For the leak
detector, refer to the instruction manual for more details. Refer
.
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace.
8.
CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
• EVAP canister vent control valve is installed properly.
.
• EVAP canister vent control valve.
.
OK or NG
OK
>> GO TO 9.
NG
>> Repair or replace EVAP canister vent control valve and O-ring. Refer to
9.
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"
.
SEF200U
AWBIA0134ZZ
SEF200U
2011 Pathfinder
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