Nissan Sentra. Manual — part 407

EC-324

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

P0456 EVAP CONTROL SYSTEM

YES

>> GO TO 13.

NO

>> Repair or reconnect the hose.

13.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Check the EVAP canister purge volume control solenoid valve. Refer to

EC-296, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 14.

NO

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

EM-27, "Exploded View"

.

14.

CHECK FUEL TANK TEMPERATURE SENSOR

Check the fuel tank temperature sensor. Refer to

EC-257, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> Replace fuel level sensor unit. Refer to

FL-6, "Removal and Installation"

.

15.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Check the EVAP control system pressure sensor. Refer to

FL-15, "Removal and Installation"

.

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> Replace EVAP control system pressure sensor. Refer to

FL-15, "Removal and Installation"

.

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-49, "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-49, "EVAPORATIVE EMISSION SYSTEM : System Description"

.

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-10, "Exploded View"

.

20.

CHECK REFUELING EVAP VAPOR CUT VALVE

Check the refueling EVAP vapor cut valve. Refer to

FL-13, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 21.

NO

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

FL-10, "Removal and Installation"

.

21.

CHECK FUEL LEVEL SENSOR

Check the fuel level sensor. Refer to

MWI-59, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-39, "Intermittent Incident"

.

P0456 EVAP CONTROL SYSTEM

EC-325

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NO

>> Replace fuel level sensor unit. Refer to

FL-6, "Removal and Installation"

.

Component Inspection

INFOID:0000000009758559

1.

CHECK FUEL FILLER CAP

1. Turn ignition switch OFF.

2. Remove fuel filler cap.

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.

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-326

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

P0460 FUEL LEVEL SENSOR

P0460 FUEL LEVEL SENSOR

DTC Logic

INFOID:0000000009758560

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-350, "DTC Logic"

.

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

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting 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-326, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009758561

1.

CHECK COMBINATION METER FUNCTION

Refer to

MWI-17, "CONSULT Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-39, "Intermittent Incident"

.

NO

>> Refer to

MWI-58, "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 sig-
nal 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-327

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P0461 FUEL LEVEL SENSOR

DTC Logic

INFOID:0000000009758562

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-350, "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-327, "Component Function Check"

.

Use component function check to check the overall function of the fuel level sensor function. During this

check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to

EC-328, "Diagnosis Procedure"

.

Component Function Check

INFOID:0000000009758563

1.

PRECONDITIONING

WARNING:

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

EC-10,

"General Precautions"

.

TESTING CONDITION:

Before starting component function check, preparation of draining fuel and refilling fuel is required.
Do you have CONSULT?

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-143, "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 of “ENGINE” using CONSULT.

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

8. Select “FUEL PUMP RELAY” in “ACTIVE TEST” mode of “ENGINE” using 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 distance.

• 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