Nissan Frontier D22. Manual - part 465

DTC P0456 EVAP CONTROL SYSTEM

EC-963

[VG33E]

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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.

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-1165, "EVAPORATIVE EMISSION LINE DRAW-

ING"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace.

AEC649A

SEF916U

PEF917U

SEF200U

EC-964

[VG33E]

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 12V 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 pres-

sure 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-1165, "EVAPORATIVE EMISSION LINE DRAWING"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace.

8. 

CHECK WATER SEPARATOR

1.

Check visually for insect nests in the water separator air inlet.

2.

Check visually for cracks or flaws in the appearance.

3.

Check visually for cracks or flaws in the hose.

4.

Check that A  and C  are not clogged by blowing air into B  with
A , and then C  plugged.

5.

In case of NG in items 2 - 4, replace the parts.

NOTE:
Do not disassemble water separator.

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-1083, "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.

AEC632A

SEF200U

PBIB1032E

DTC P0456 EVAP CONTROL SYSTEM

EC-965

[VG33E]

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10. 

CHECK IF EVAP CANISTER SATURATED WITH WATER

1.

Remove EVAP canister with EVAP canister vent control valve attached.

2.

Does water drain from the EVAP canister?

Yes or No

Yes

>> GO TO 11.

No (With CONSULT-II)>>GO TO 13.
No (Without CONSULT-II)>>GO TO 14.

11. 

CHECK EVAP CANISTER

Weigh the EVAP canister with the EVAP canister vent control valve attached.
The weight should be less than 1.8 kg (4.0 lb).

OK or NG

OK (With CONSULT-II)>>GO TO 13.
OK (Without CONSULT-II)>>GO TO 14.
NG

>> GO TO 12.

12. 

DETECT MALFUNCTIONING PART

Check the following.

●

EVAP canister for damage

●

EVAP hose between EVAP canister and water separator for clogging or poor connection

>> Repair hose or replace EVAP canister.

13. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

 With CONSULT-II

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-II 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 16.

NG

>> GO TO 15.

SEF596U

Vacuum should exist.

SEF677Y

EC-966

[VG33E]

DTC P0456 EVAP CONTROL SYSTEM

14. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

 Without CONSULT-II

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 17.

NG

>> GO TO 15.

15. 

CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. Refer to 

EC-598, "Vacuum Hose Drawing"

 .

OK or NG

OK (With CONSULT-II)>>GO TO 16.
OK (Without CONSULT-II)>>GO TO 17.
NG

>> Repair or reconnect the hose.

16. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

 With CONSULT-II

1.

Start engine.

2.

Perform  “PURG VOL CONT/V” in “ACTIVE TEST” mode with
CONSULT-II. Check that engine speed varies according to the
valve opening.

OK or NG

OK

>> GO TO 18.

NG

>> GO TO 17.

Vacuum should exist.

SEF985Y