Nissan Quest E52. Manual - part 527

EC-318

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0456 EVAP CONTROL SYSTEM

1.

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

2.

Check if water will drain from the EVAP canister.

Does water drain from EVAP canister?

YES

>> GO TO 8.

NO-1

>> With CONSULT: GO TO 10.

NO-2

>> Without CONSULT: GO TO 11.

8.

CHECK EVAP CANISTER

Weigh the EVAP canister assembly with the EVAP canister vent control valve and EVAP control system pres-
sure sensor attached. Refer to 

FL-16, "Exploded View"

.

The weight should be less than 2.1 kg (4.6 lb).

Is the inspection result normal?

YES-1 >> With CONSULT: GO TO 10.
YES-2 >> Without CONSULT: GO TO 11.
NO

>> GO TO 9.

9.

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. Refer to 

FL-15, "Hydraulic Layout"

.

10.

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 and let it idle.

3.

Select “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.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> GO TO 12.

11.

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.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> GO TO 12.

12.

CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. Refer to 

FL-15, "Hydraulic Layout"

.

Is the inspection result normal?

JMBIA1134GB

Vacuum should exist.

Vacuum should exist.

P0456 EVAP CONTROL SYSTEM

EC-319

< DTC/CIRCUIT DIAGNOSIS >

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YES

>> GO TO 13.

NO

>> Repair or reconnect the hose.

13.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-293, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Replace EVAP canister purge volume control solenoid valve. Refer to 

EM-28, "Exploded View"

.

14.

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to 

EC-252, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> Replace fuel level sensor unit. Refer to 

FL-5, "Removal and Installation"

.

15.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-305, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> Replace EVAP control system pressure sensor. Refer to 

FL-16, "Exploded View"

.

16.

CHECK EVAP PURGE LINE

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

FL-15, "Hydraulic Layout"

.

Is the inspection result normal?

YES

>> GO TO 17.

NO

>> Repair or reconnect the hose.

17.

CLEAN EVAP PURGE LINE

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

>> GO TO 18.

18.

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 

FL-15, "Hydraulic Layout"

.

Is the inspection result normal?

YES

>> GO TO 19.

NO

>> Repair or replace hoses and tubes.

19.

CHECK RECIRCULATION LINE

Check recirculation line between fuel filler tube and fuel tank for clogging, kink, cracks, looseness and
improper connection.

Is the inspection result normal?

YES

>> GO TO 20.

NO

>> Repair or replace hose, tube or fuel filler tube. Refer to 

FL-12, "Exploded View"

.

20.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-440, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 21.

NO

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

FL-12, "Exploded View"

.

21.

CHECK FUEL LEVEL SENSOR

Refer to 

MWI-78, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 22.

EC-320

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0456 EVAP CONTROL SYSTEM

NO

>> Replace fuel level sensor unit. Refer to 

FL-5, "Removal and Installation"

.

22.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009651148

1.

CHECK FUEL FILLER CAP

1.

Turn ignition switch OFF.

2.

Remove fuel filler cap. Refer to 

FL-12, "Exploded View"

.

3.

Wipe clean valve housing.

4.

Install fuel filler cap adapter (commercial service tool) to fuel filler cap.

5.

Check valve opening pressure and vacuum.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE FUEL FILLER CAP

Replace fuel filler cap. Refer to 

FL-12, "Exploded View"

.

CAUTION:

Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may
illuminate.

>> INSPECTION END

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

P0460 FUEL LEVEL SENSOR

EC-321

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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P0460 FUEL LEVEL SENSOR

DTC Logic

INFOID:0000000009651149

DTC DETECTION LOGIC

NOTE:
• If DTC P0460 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
• If DTC P0460 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer

to 

EC-336, "DTC Logic"

.

When the vehicle is parked, the fuel level in the fuel tank is naturally 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

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and wait maximum of 2 consecutive minutes.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-321, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009651150

1.

CHECK COMBINATION METER FUNCTION

Check combination meter function. Refer to 

MWI-35, "CONSULT Function"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

NO

>> Proceed to 

MWI-77, "Diagnosis Procedure"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0460

Fuel level sensor circuit 
noise

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

• Harness or connectors

(The CAN communication line is open or 
shorted)

• Harness or connectors

(The sensor circuit is open or shorted)

• Combination meter
• Fuel level sensor