Nissan Frontier D22. Manual — part 316
DTC P0456 EVAP CONTROL SYSTEM
EC-367
[KA24DE]
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CAUTION:
●
Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used,
the MIL may come on.
●
If the fuel filler cap is not tightened properly, the MIL may come on.
●
Use only a genuine NISSAN rubber tube as a replacement.
DTC Confirmation Procedure
UBS00D88
NOTE:
●
If DTC P0456 or P1456 is displayed with P0442, first perform trouble diagnosis for DTC P0456 or
P1456.
●
Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid valve
properly.
●
After repair, make sure that the hoses and clips are installed properly.
●
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch OFF and wait
at least 5 seconds before conducting the next test.
WITH CONSULT-II
TESTING CONDITION:
●
Open engine hood before conducting following procedure.
●
If any of following condition is met just before the DTC confirmation procedure, leave the vehicle
for more than 1 hour.
–
Fuel filler cap is removed.
–
Refilled or drained the fuel.
–
EVAP component parts is/are removed.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0456
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 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
control valve.
●
EVAP canister or fuel tank leaks
●
EVAP purge line (pipe and rubber tube) leaks
●
EVAP purge line rubber tube bent
●
Blocked or bent rubber tube to EVAP control
system pressure sensor
●
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
missing or damaged
●
Water separator
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EVAP canister is saturated with water
●
EVAP control system pressure sensor
●
Refueling control valve
●
ORVR system leaks
●
Fuel level sensor and the circuit
●
Foreign matter caught in EVAP canister purge
volume control solenoid valve
EC-368
[KA24DE]
DTC P0456 EVAP CONTROL SYSTEM
●
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
1.
Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2.
Make sure the following conditions are met.
FUEL LEVEL SE: 1.16 - 0.25V
COOLAN TEMP/S: 0 - 32
°C (32 - 90°F)
FUEL T/TMP SE: 0 - 32
°C (32 - 90°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 refilling/draining fuel until the output
voltage condition 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 5 seconds.
4.
Turn ignition switch ON.
5.
Select “EVAP V/S LEAK P0456/P1456” of “EVAP SYSTEM” in “DTC WORK SUPPORT” mode with CON-
SULT-II.
Follow the instruction displayed.
6.
Make sure that “OK” is displayed.
If “NG” is displayed, refer to
EC-369, "Diagnostic Procedure"
NOTE:
●
If the engine speed cannot be maintained within the range displayed on CONSULT-II screen, go to
Overall Function Check
UBS00D89
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.
●
Do not start engine.
●
Do not exceeded 4.12 kPa (0.042 kg/cm
2
, 0.6 psi).
1.
Attach the EVAP service port adapter securely to the EVAP service 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 MODE 8.
6.
Using MODE 8 control the EVAP canister vent control valve
(close) and vacuum cut valve bypass valve (open).
7.
Apply pressure and make sure the following conditions are sat-
isfied.
Pressure to be applied: 2.7 kPa (20 mmHg, 0.79 inHg)
PBIB1953E
PBIB0837E
SEF462UA
DTC P0456 EVAP CONTROL SYSTEM
EC-369
[KA24DE]
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EC
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 (3 mmHg, 0.12 inHg)
If NG, go to
EC-369, "Diagnostic Procedure"
If OK, go to next step.
NOTE:
For more information, refer to GST instruction manual.
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.
Diagnostic Procedure
UBS00D8A
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 cap is tightened properly by rotating the cap clockwise.
OK or NG
OK
>> GO TO 3.
NG
>>
●
Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
●
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.
SEF915U
EC-370
[KA24DE]
DTC P0456 EVAP CONTROL SYSTEM
4.
CHECK FUEL TANK VACUUM RELIEF VALVE
1.
Wipe clean valve housing.
2.
Check valve opening pressure and vacuum.
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an
incorrect fuel filler cap is used, the MIL may come on.
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 and pres-
sure pump to EVAP service port securely.
NOTE:
Improper installation of the EVAP service port adapter to the
EVAP service port may cause leaking.
Models with CONSULT-II>>GO TO 6.
Models without CONSULT-II>>GO TO 7.
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
SEF339V
SEF916U
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