Infiniti F50. Manual — part 434
DTC P0456 EVAP CONTROL SYSTEM
EC-377
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EC
Overall Function Check
EBS00MFG
WITH GST
Use this procedure to check the overall function of the EVAP very small leak function. During this check, a
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 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 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)
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-378, "Diagnostic Procedure"
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”.
NOTE:
For more information, refer to GST instruction manual.
PBIB1251E
SEF462UI
EC-378
DTC P0456 EVAP CONTROL SYSTEM
Diagnostic Procedure
EBS00MFH
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
>> 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
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
Refer to
EC-687, "FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FULLER CAP)"
OK or NG
OK
>> GO TO 5.
NG
>> Replace fuel filler cap with a genuine one.
SEF915U
DTC P0456 EVAP CONTROL SYSTEM
EC-379
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EC
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
EC-685, "EVAPORATIVE EMISSION LINE
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.
6.
CHECK FOR EVAP LEAK
With CONSULT-II
1.
Turn ignition switch “ON”.
2.
Select “EVAP SYSTEM CLOSE” of “WORK SUPPORT” mode with CONSULT-II.
3.
Touch “START” and apply pressure into the EVAP line until the
pressure indicator reaches the middle of the bar graph.
NOTE:
●
Never use compressed air or a high pressure pump.
●
Do not exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pres-
sure 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 to
EC-685, "EVAPORATIVE EMISSION LINE DRAWING"
.
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace.
PBIB1251E
SEF916U
PEF917U
SEF200U
EC-380
DTC P0456 EVAP CONTROL SYSTEM
7.
CHECK FOR EVAP LEAK
Without CONSULT-II
1.
Turn ignition switch “OFF”.
2.
Apply 12 volts DC to EVAP canister vent control valve. The valve will close. (Continue to apply 12 volts
until the end of test.)
3.
Apply 12 volts DC to vacuum cut valve bypass valve. The valve will open. (Continue to apply 12 volts until
the end of test.)
4.
Pressurize the EVAP line using pressure pump with 1.3 to 2.7 kPa (10 to 20 mmHg, 0.39 to 0.79 inHg),
then remove pump and EVAP service port adapter.
NOTE:
●
Never use compressed air or a high pressure pump.
●
Do not exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pressure in the system.
5.
Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction manual for more details. Refer
to
EC-685, "EVAPORATIVE EMISSION LINE DRAWING"
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace.
8.
CHECK WATER SEPARATOR
Refer to
EC-383, "Component Inspection"
OK or NG
OK
>> GO TO 9.
NG
>> Replace water separator.
9.
CHECK EVAP CANISTER VENT CONTROL VALVE, O-RING AND CIRCUIT
Refer to
EC-553, "DTC Confirmation Procedure"
.
OK or NG
OK
>> GO TO 10.
NG
>> Repair or replace EVAP canister vent control valve and O-ring or harness/connector.
PBIB0189E
SEF200U
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