Nissan Maxima. Manual - part 459

EC-320

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0442 EVAP CONTROL SYSTEM

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Repair or reconnect the hose.

14.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-327, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> Replace EVAP canister purge volume control solenoid valve.

15.

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to 

EC-272, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> Replace fuel level sensor unit and fuel pump. Refer to 

FL-6, "Removal and Installation"

.

16.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-346, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 17.

NO

>> Replace EVAP control system pressure sensor. Refer to 

FL-17, "Removal and Installation"

.

17.

CHECK EVAP PURGE LINE

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

Refer to 

EC-94, "System Diagram"

.

Is the inspection result normal?

YES

>> GO TO 18.

NO

>> Repair or reconnect the hose.

18.

CLEAN EVAP PURGE LINE

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

>> GO TO 19.

19.

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-508, "Description"

.

Is the inspection result normal?

YES

>> GO TO 20.

NO

>> Repair or replace hoses and tubes.

20.

CHECK RECIRCULATION LINE

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

improper connection.
Is the inspection result normal?

YES

>> GO TO 21.

NO

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

21.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-511, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 22.

NO

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

FL-10, "Exploded View"

. 

22.

CHECK FUEL LEVEL SENSOR

Refer to 

EC-321, "Component Inspection"

.

Is the inspection result normal?

P0442 EVAP CONTROL SYSTEM

EC-321

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YES

>> GO TO 23.

NO

>> Replace fuel level sensor unit and fuel pump. Refer to 

FL-6, "Removal and Installation"

.

23.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-41, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000010095007

FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)

1.

CHECK FUEL FILLER CAP

1. Turn ignition switch OFF.

2. Remove fuel filler cap. Refer to 

FL-10, "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-10, "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

DRAIN FILTER

1. Check visually for insect nests in the drain filter air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.

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-322

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0442 EVAP CONTROL SYSTEM

4. Blow air into port A and check that it flows freely out of port B.
5. Block port B.
6. Blow air into port A and check that there is no leakage.
7. If NG, replace drain filter.

PBIB3641E

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-323

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Description

INFOID:0000000010095008

The EVAP canister purge volume control solenoid valve is used to

control the flow rate of fuel vapor from the EVAP canister. The EVAP

canister purge volume control solenoid valve is moved by ON/OFF

pulses from the ECM. The longer the ON pulse, the greater the

amount of fuel vapor that will flow via the valve.

DTC Logic

INFOID:0000000010095009

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at

least 10 seconds before conducting the next test.

TESTING CONDITION:

• Perform DTC CONFIRMATION PROCEDURE when the fuel is between 1/4 and 3/4 full, and vehicle is

placed on flat level surface.

• Always perform test at a temperature of 5 to 60

°C (41 to 140°F).

• Cool the vehicle so that engine coolant temperature becomes same level as ambient temperature.
Do you have CONSULT

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

PERFORM DTC CONFIRMATION PROCEDURE A

With CONSULT

1. Turn ignition switch ON.

2. Select “DATA MONITOR” mode with CONSULT.

3. Check that the following condition are met.

FUEL T/TMP SE: 0 - 35

°C (32 - 95°F)

4. Start engine and wait at least 60 seconds.

5. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Go to 

EC-324, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE B

PBIB3489E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0443

EVAP canister purge 
volume control solenoid 
valve

A

The canister purge flow is detected during 
the vehicle is stopped while the engine is 
running, even when EVAP canister purge 
volume control solenoid valve is completely 
closed.

• EVAP control system pressure sensor
• EVAP canister purge volume control sole-

noid valve
(The valve is stuck open.)

• EVAP canister vent control valve
• Drain filter
• EVAP canister
• Hoses

(Hoses are connected incorrectly or 
clogged.)

B

The canister purge flow is detected during 
the specified driving conditions, even when 
EVAP canister purge volume control sole-
noid valve is completely closed.