Infiniti M35/M45 Y50. Manual - part 673

DTC P0456 EVAP CONTROL SYSTEM

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7. 

CHECK FOR EVAP LEAK

 Without CONSULT-II

1.

Turn ignition switch OFF.

2.

Apply 12 volts DC to EVAP canister vent control valve (1). The
valve will close. (Continue to apply 12 volts until the end of test.)

–

Illustration shows the view from under the vehicle

–

: Vehicle front

–

EVAP canister (2)

–

EVAP control system pressure sensor (3)

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-742, "EVAPORATIVE EMISSION LINE DRAWING"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace.

8. 

CHECK EVAP CANISTER VENT CONTROL VALVE

Check the following.

●

EVAP canister vent control valve is installed properly.
Refer to 

EC-745, "Removal and Installation"

 .

●

EVAP canister vent control valve.
Refer to 

EC-1128, "Component Inspection"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace EVAP canister vent control valve and O-ring.

9. 

CHECK IF EVAP CANISTER SATURATED WITH WATER

1.

Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.

2.

Does water drain from the EVAP canister?

–

EVAP canister (1)

–

EVAP canister vent control valve (2)

Yes or No

Yes

>> GO TO 10.

No (With CONSULT-II)>>GO TO 12.
No (Without CONSULT-II)>>GO TO 13.

PBIB2702E

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DTC P0456 EVAP CONTROL SYSTEM

10. 

CHECK EVAP CANISTER

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.0 kg (4.4 lb).
OK or NG

OK (With CONSULT-II)>>GO TO 12.
OK (Without CONSULT-II)>>GO TO 13.
NG

>> GO TO 11.

11. 

DETECT MALFUNCTIONING PART

Check the following.

●

EVAP canister for damage

●

EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

>> Repair hose or replace EVAP canister.

12. 

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 15.

NG

>> GO TO 14.

13. 

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 15.

NG

>> GO TO 14.

14. 

CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. Refer to 

EC-814, "Vacuum Hose Drawing"

 .

OK or NG

OK

>> GO TO 15.

NG

>> Repair or reconnect the hose.

PBIB1678E

Vacuum should exist.

DTC P0456 EVAP CONTROL SYSTEM

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15. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-1121, "Component Inspection"

 .

OK or NG

OK

>> GO TO 16.

NG

>> Replace EVAP canister purge volume control solenoid valve.

16. 

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to 

EC-1048, "Component Inspection"

 .

OK or NG

OK

>> GO TO 17.

NG

>> Replace fuel level sensor unit.

17. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-1144, "Component Inspection"

 .

OK or NG

OK

>> GO TO 18.

NG

>> Replace EVAP control system pressure sensor.

18. 

CHECK EVAP PURGE LINE

Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection.
Refer to 

EC-742, "EVAPORATIVE EMISSION LINE DRAWING"

 .

OK or NG

OK

>> GO TO 19.

NG

>> Repair or reconnect the hose.

19. 

CLEAN EVAP PURGE LINE

Clean EVAP purge line (pipe and rubber tube) using air blower.

>> GO TO 20.

20. 

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-748, "ON BOARD REFUELING VAPOR RECOVERY (ORVR)"

 .

OK or NG

OK

>> GO TO 21.

NG

>> Repair or replace hoses and tubes.

21. 

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 22.

NG

>> Repair or replace hose, tube or filler neck tube.

22. 

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-751, "Component Inspection"

 .

OK or NG

OK

>> GO TO 23.

NG

>> Replace refueling EVAP vapor cut valve with fuel tank. 

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DTC P0456 EVAP CONTROL SYSTEM

23. 

CHECK FUEL LEVEL SENSOR

Refer to 

DI-26, "CHECK FUEL LEVEL SENSOR UNIT"

 .

OK or NG

OK

>> GO TO 24.

NG

>> Replace fuel level sensor unit.

24. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END