Infiniti F50. Manual - part 435

DTC P0456 EVAP CONTROL SYSTEM

EC-381

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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 100.0%.

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.

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PBIB0147E

EC-382

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-24, "Vacuum Hose Drawing"

 .

OK or NG

OK

>> GO TO 16.

NG

>> Repair or reconnect the hose.

16. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-544, "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-290, "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-365, "Component Inspection"

 .

OK or NG

OK

>> GO TO 19.

NG

>> Replace EVAP control system pressure sensor.

19. 

CHECK EVAP PURGE LINE

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

EC-685, "EVAPORATIVE EMISSION LINE DRAWING"

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OK or NG

OK

>> GO TO 20.

NG

>> Repair or reconnect the hose.

20. 

CLEAN EVAP PURGE LINE

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

>> GO TO 21.

Vacuum should exist.

DTC P0456 EVAP CONTROL SYSTEM

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21. 

CHECK REFUELING EVAP VAPOR LINE

Check refueling EVAP vapor line between EVAP canister and fuel tank for clogging, kink, looseness and
improper connection. For location, refer to 

EC-690, "ON BOARD REFUELING VAPOR RECOVERY (ORVR)"

.
OK or NG

OK

>> GO TO 22.

NG

>> Repair or replace hoses and tubes.

22. 

CHECK SIGNAL LINE AND RECIRCULATION LINE

Check signal line and recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, loose-
ness and improper connection.
OK or NG

OK

>> GO TO 23.

NG

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

23. 

CHECK REFUELING CONTROL VALVE

Refer to 

EC-693, "Component Inspection"

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OK or NG

OK

>> GO TO 24.

NG

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

24. 

CHECK FUEL LEVEL SENSOR

Refer to 

DI-26, "CHECK FUEL LEVEL SENSOR UNIT"

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OK or NG

OK

>> GO TO 25.

NG

>> Replace fuel level sensor unit.

25. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

EBS00MFI

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:

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Do not disassemble water separator.

PBIB1032E

EC-384

DTC P0460 FUEL LEVEL SENSOR

DTC P0460 FUEL LEVEL SENSOR

PFP:25060

Component Description

EBS00MFJ

The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the ECM.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.

On Board Diagnosis Logic

EBS00MFK

When the vehicle is parked, naturally the fuel level in the fuel tank is stable. It means that output signal of the
fuel level sensor does not change. If ECM senses sloshing signal from the sensor, fuel level sensor malfunc-
tion is detected.

DTC Confirmation Procedure

EBS00MFL

NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.

 WITH CONSULT-II

1.

Turn ignition switch “ON”.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Start engine and wait maximum of 2 consecutive minutes.

4.

If 1st trip DTC is detected, go to 

EC-386, "Diagnostic Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

PBIB1241E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0460
0460

Fuel level sensor circuit 
noise

Even though the vehicle is parked, a signal 
being varied is sent from the fuel level sensor 
to ECM.

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Harness or connectors
(The sensor circuit is open or shorted)

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Fuel level sensor

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