Nissan Titan. Manual — part 257
P0455 EVAP CONTROL SYSTEM
EC-329
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[VK56DE]
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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.
With CONSULT>>GO TO 10.
Without CONSULT>>GO TO 11.
10.
CHECK FOR EVAP LEAK
With CONSULT
1. Turn ignition switch ON.
2. Select “EVAP SYSTEM CLOSE” of “WORK SUPPORT” mode with CONSULT.
3. Touch “START” and apply pressure into the EVAP line until the pressure indicator reaches the middle of
the bar graph.
CAUTION:
• Do not 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.
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 12.
NG
>> Repair or replace.
11.
CHECK FOR EVAP LEAK
Without CONSULT
1. Turn ignition switch OFF.
BBIA0366E
SEF916U
SEF200U
EC-330
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[VK56DE]
P0455 EVAP CONTROL SYSTEM
2. Apply 12 volts DC to EVAP canister vent control valve (4). The
valve will close. (Continue to apply 12 volts until the end of test.)
3. 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.
CAUTION:
• Do not 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.
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 13.
NG
>> Repair or replace.
12.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT
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 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 15.
NG
>> GO TO 14.
13.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT
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 16.
NG
>> GO TO 14.
14.
CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. Refer to
.
OK or NG
OK (With CONSULT)>>GO TO 15.
OK (Without CONSULT)>>GO TO 16.
NG
>> Repair or reconnect the hose.
1
: Drain filter
2
: EVAP control system pressure sensor
3
: EVAP canister
ALBIA0401ZZ
SEF200U
Vacuum should exist.
Vacuum should exist.
P0455 EVAP CONTROL SYSTEM
EC-331
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[VK56DE]
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15.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT
1. Start engine.
2. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT. Check that engine speed varies
according to the valve opening.
OK or NG
OK
>> GO TO 17.
NG
>> GO TO 16.
16.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-303, "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-253, "Component Inspection"
OK or NG
OK
>> GO TO 18.
NG
>> Replace fuel level sensor unit.
18.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-315, "Component Inspection"
OK or NG
OK
>> GO TO 19.
NG
>> Replace EVAP control system pressure sensor.
19.
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 20.
NG
>> Repair or replace hoses and tubes.
20.
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 21.
NG
>> Repair or replace hose, tube or filler neck tube.
21.
CHECK REFUELING EVAP VAPOR CUT VALVE
EC-477, "Component Inspection"
OK or NG
OK
>> GO TO 22.
NG
>> Replace refueling EVAP vapor cut valve with fuel tank.
22.
CHECK INTERMITTENT INCIDENT
GI-39, "How to Check Terminal"
GI-42, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000009886740
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)
EC-332
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P0455 EVAP CONTROL SYSTEM
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 come on.
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
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