Content .. 555 556 557 558 ..

Nissan Altima L32. Manual - part 557

P0455 EVAP CONTROL SYSTEM

EC-1349

< COMPONENT DIAGNOSIS >

[VQ35DE]

CHECK FOR EVAP LEAKAGE

Refer to

EC-1581, "Inspection"

Is there any leakage in EVAP line?

YES

>> Repair or replace.

NO-1 >> With CONSULT-III: GO TO 9.

NO-2 >> Without CONSULT-III: GO TO 10.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT-III

1. Disconnect vacuum hose from EVAP canister purge volume control solenoid valve at EVAP service port.

2. Start engine.

3. Perform “PURG VOL C/V” in “ACTIVE TEST” mode.

4. Touch “Qu” on CONSULT-III screen to increase “PURG VOL C/V” opening to 100%.

5. Check vacuum hose for vacuum.

Is the inspection result normal?

YES

>> GO TO 12.

>> GO TO 11.

10.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

Without CONSULT-III

1. Start engine and warm it up to normal operating temperature.

2. Stop engine.

3. Disconnect vacuum hose from 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.

>> GO TO 11.

11.

CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. Refer to

EC-1116, "System Diagram"

Is the inspection result normal?

YES-1 >> With CONSULT-III: GO TO 12.

YES-2 >> Without CONSULT-III: GO TO 13.

>> Repair or reconnect the hose.

12.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-III

1. Start engine.

2. Perform “PURG VOL C/V” in “ACTIVE TEST” mode with CONSULT-III. Check that engine speed varies

according to the valve opening.

Does engine speed vary according to the valve opening?

YES

>> GO TO 14.

>> GO TO 13.

13.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to

EC-1319, "Component Inspection"

Is the inspection result normal?

YES

>> GO TO 14.

>> Replace EVAP canister purge volume control solenoid valve.

14.

CHECK FUEL TANK TEMPERATURE SENSOR

Vacuum should exist.

EC-1350

< COMPONENT DIAGNOSIS >

[VQ35DE]

P0455 EVAP CONTROL SYSTEM

Refer to

EC-1276, "Component Inspection"

Is the inspection result normal?

YES

>> GO TO 15.

>> Replace fuel level sensor unit.

15.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to

EC-1334, "Component Inspection"

Is the inspection result normal?

YES

>> GO TO 16.

>> Replace EVAP control system pressure sensor.

16.

CHECK EVAP/ORVR LINE

Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper

connection. For location, refer to

EC-1497, "Description"

Is the inspection result normal?

YES

>> GO TO 17.

>> Repair or replace hoses and tubes.

17.

CHECK RECIRCULATION LINE

Check recirculation line between fuel filler tube and fuel tank for clogging, kinks, cracks, looseness and

improper connection.
Is the inspection result normal?

YES

>> GO TO 18.

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

18.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to

EC-1500, "Component Inspection"

Is the inspection result normal?

YES

>> GO TO 19.

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

19.

CHECK INTERMITTENT INCIDENT

Refer to

GI-42, "Intermittent Incident"

>> INSPECTION END

Component Inspection

INFOID:0000000004362187

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.

SEF445Y

P0455 EVAP CONTROL SYSTEM

EC-1351

< COMPONENT DIAGNOSIS >

[VQ35DE]

5. Check valve opening pressure and vacuum.

Is the inspection result normal?

YES

>> INSPECTION END

>> GO TO 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

Pressure: 15.3 - 20.0 kPa (0.156 - 0.204 kg/cm

, 2.22 -

2.90 psi)

Vacuum:

−6.0 to −3.3 kPa (−0.061 to −0.034 kg/cm

−0.87 to −0.48 psi)

SEF943S

EC-1352

< COMPONENT DIAGNOSIS >

[VQ35DE]

P0456 EVAP CONTROL SYSTEM

P0456 EVAP CONTROL SYSTEM

DTC Logic

INFOID:0000000004362188

DTC DETECTION LOGIC

NOTE:

If DTC P0456 is displayed with DTC P0442, first perform the trouble diagnosis for DTC P0456.

This diagnosis detects very small leakage in the EVAP line between fuel tank and EVAP canister purge vol-

ume control solenoid valve, using the negative pressure.

If ECM judges a leakage which corresponds to a very small leakage, the very small leakage P0456 will be

detected.

If ECM judges a leakage equivalent to a small leakage, EVAP small leakage P0442 will be detected.

If ECM judges that there are no leakage, the diagnosis will be OK.

CAUTION:

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0456

Evaporative emission
control system very
small leakage (negative
pressure check)

• EVAP system has a very small leak-

age.

• EVAP system does not operate prop-

erly.

• Incorrect fuel tank vacuum relief valve
• Incorrect fuel filler cap used
• Fuel filler cap remains open or fails to close.
• Foreign matter caught in fuel filler cap.
• Leakage is in line between intake manifold and

EVAP canister purge volume control solenoid
valve.

• Foreign matter caught in EVAP canister vent con-

trol valve.

• EVAP canister or fuel tank leakage
• EVAP purge line (pipe and rubber tube) leakage
• EVAP purge line rubber tube bent
• Loose or disconnected rubber tube
• EVAP canister vent control valve and the circuit
• EVAP canister purge volume control solenoid

valve and the circuit

• Fuel tank temperature sensor
• O-ring of EVAP canister vent control valve is miss-

ing or damaged

• EVAP canister is saturated with water
• EVAP control system pressure sensor
• Refueling EVAP vapor cut valve
• ORVR system leakage
• Fuel level sensor and the circuit
• Foreign matter caught in EVAP canister purge vol-

ume control solenoid valve

PBIB1026E

Content .. 555 556 557 558 ..