Nissan Pathfinder. Manual - part 505

EC-326

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0456 EVAP CONTROL SYSTEM

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Repair or reconnect the hose.

13.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-301, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Replace EVAP canister purge volume control solenoid valve.

14.

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to 

EC-263, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> Replace fuel level sensor unit.

15.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-315, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> Replace EVAP control system pressure sensor.

16.

CHECK EVAP PURGE LINE

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

Refer to 

EC-41, "EVAPORATIVE EMISSION SYSTEM : System Description"

.

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 

EC-29, "On Board Refueling Vapor Recovery (ORVR)"

.

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.

20.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-446, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 21.

NO

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

21.

CHECK FUEL LEVEL SENSOR

Refer to 

MWI-66, "Component Inspection"

.

Is the inspection result normal?

P0456 EVAP CONTROL SYSTEM

EC-327

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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YES

>> GO TO 22.

NO

>> Replace fuel level sensor unit.

22.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-49, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009178229

1.

CHECK FUEL FILLER CAP

1. Turn ignition switch OFF.

2. Remove fuel filler cap. Refer to 

FL-13, "Removal and Installation"

.

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-13, "Removal and Installation"

.

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

EC-328

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0460 FUEL LEVEL SENSOR

P0460 FUEL LEVEL SENSOR

DTC Logic

INFOID:0000000009178230

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-353, "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-329, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009178231

1.

CHECK COMBINATION METER FUNCTION

Check combination meter function. Refer to 

MWI-19, "CONSULT Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-49, "Intermittent Incident"

.

NO

>> Proceed to 

MWI-65, "Diagnosis Procedure"

.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0460

FUEL LEV SEN SLOSH
(Fuel level sensor “A” circuit)

Even though the vehicle is parked, a signal 
being 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

P0461 FUEL LEVEL SENSOR

EC-329

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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P0461 FUEL LEVEL SENSOR

DTC Logic

INFOID:0000000009178232

DTC DETECTION LOGIC

NOTE:

• If DTC P0461 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.

• If DTC P0461 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer

to 

EC-353, "DTC Logic"

.

Driving long distances naturally affect fuel gauge level.

This diagnosis detects the fuel gauge malfunction of the gauge not moving even after a long distance has

been driven.

DTC CONFIRMATION PROCEDURE

1.

PERFORM COMPONENT FUNCTION CHECK

Perform component function check. Refer to 

EC-330, "Component Function Check"

.

Use component function check to check the overall function of the fuel level sensor. During this check, a 1st

trip DTC might not be confirmed.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-331, "Diagnosis Procedure"

.

Component Function Check

INFOID:0000000009178233

1.

PRECONDITIONING

WARNING:

When performing the following procedure, always observe the handling of the fuel. Refer to 

FL-6,

"Removal and Installation"

.

TESTING CONDITION:

Before starting component function check, preparation of draining fuel and refilling fuel is required.
Will CONSULT be used?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

PERFORM COMPONENT FUNCTION CHECK

With CONSULT

NOTE:
Start from step 10, if it is possible to confirm that the fuel cannot be drained by 30   (7-7/8 US gal, 6-5/

8 Imp gal) in advance.

1. Prepare a fuel container and a spare hose.

2. Release fuel pressure from fuel line, refer to 

EC-463, "Work Procedure"

.

3. Remove the fuel feed hose on the fuel level sensor unit.

4. Connect a spare fuel hose where the fuel feed hose was removed.

5. Turn ignition switch OFF and wait at least 10 seconds then turn ON.

6. Select “FUEL LEVEL SE” in “DATA MONITOR” mode with CONSULT.

7. Check “FUEL LEVEL SE” output voltage and note it.

8. Select “FUEL PUMP RELAY” in “ACTIVE TEST” mode with CONSULT.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0461

FUEL LEVEL SENSOR
(Fuel level sensor “A” circuit 
range/performance)

The output signal of the fuel level sensor does 
not change within the specified range even 
though the vehicle has been driven a long dis-
tance.

• 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