Nissan Titan. Manual - part 257

P0455 EVAP CONTROL SYSTEM

EC-329

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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.

Refer to 

EC-31, "Description"

.

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

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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

to 

EC-31, "Description"

.

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 

EC-31, "Description"

.

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

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Vacuum should exist.

Vacuum should exist.

P0455 EVAP CONTROL SYSTEM

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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

Refer to 

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

Refer to 

EC-253, "Component Inspection"

.

OK or NG

OK

>> GO TO 18.

NG

>> Replace fuel level sensor unit.

18.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

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 

EC-474, "System Description"

.

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

Refer to 

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

Refer to 

GI-39, "How to Check Terminal"

 and 

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

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