Nissan Titan A60. Manual - part 413

EC-318

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P0456 EVAP CONTROL SYSTEM

DTC Confirmation Procedure

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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 swich OFF and wait at least 10 seconds.
2. Turn ignition swich ON.
3. Turn ignition swich OFF and wait at least 10 seconds.
TESTING CONDITION:

• Open engine hood before conducting 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 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. Make sure 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 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, wait at least 10 seconds and then turn ON.

4. Select “EVP V/S LEAK P0456/P1456” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode

with CONSULT-III.

Follow the instruction displayed.

5. Make sure that “OK” is displayed.

If “NG” is displayed, refer to 

EC-319, "Diagnosis Procedure"

.

NOTE:

• If the engine speed cannot be maintained within the range displayed on CONSULT-III screen, go

to 

EC-110, "Basic Inspection"

.

• Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid

valve properly.

Overall Function Check

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 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:

• Do not 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).

P0456 EVAP CONTROL SYSTEM

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1. Attach the EVAP service port adapter (commercial service tool)

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 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 (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-319, "Diagnosis 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.

Diagnosis Procedure

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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.

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P0456 EVAP CONTROL SYSTEM

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-280, "Component Inspection"

.

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.

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:

• 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.

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P0456 EVAP CONTROL SYSTEM

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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.

Refer to 

EC-31, "Description"

.

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 (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 8.

NG

>> Repair or replace.

8.

CHECK DRAIN FILTER

Refer to 

EC-324, "Component Inspection"

.

OK or NG

OK

>> GO TO 9.

NG

>> Replace drain filter.

9.

CHECK EVAP CANISTER VENT CONTROL VALVE

Check the following.

• EVAP canister vent control valve is installed properly.

Refer to 

FL-16, "Removal and Installation"

.

• EVAP canister vent control valve.

Refer to 

EC-291, "Component Inspection"

.

OK or NG

OK

>> GO TO 10.

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1

: Drain filter

2

: EVAP control system pressure sensor

3

: EVAP canister

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