Infiniti FX35, FX50 (S51). Manual - part 688

P0442 EVAP CONTROL SYSTEM

EC-293

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

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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-299, "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-245, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> Replace “fuel level sensor unit and fuel pump”.

15.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-313, "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-84, "System Diagram"

.

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, kinks, looseness and improper
connection. For location, refer to 

EC-487, "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 filler neck tube and fuel tank for clogging, kinks, cracks, looseness and
improper connection.

Is the inspection result normal?

YES

>> GO TO 20.

NO

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

20.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-490, "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-62, "Component Inspection"

.

Is the inspection result normal?

EC-294

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

P0442 EVAP CONTROL SYSTEM

YES

>> GO TO 22.

NO

>> Replace “fuel level sensor unit and fuel pump (main)”.

22.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005236881

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

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-295

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

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P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Description

INFOID:0000000005236882

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 through the valve.

DTC Logic

INFOID:0000000005525067

DTC DETECTION LOGIC

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.

TESTING CONDITION:
• Perform “DTC CONFIRMATION PROCEDURE” when the fuel level 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-III

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

PERFORM DTC CONFIRMATION PROCEDURE A

With CONSULT-III

1.

Turn ignition switch ON.

2.

Check that the following condition are met.
FUEL T/TMP SE: 0 - 35

°

C (32 - 95

°

F)

3.

Start engine and wait at least 60 seconds.

4.

Check 1st trip DTC.

IS 1st trip DTC detected?

OK

>> Go to 

EC-296, "Diagnosis Procedure"

.

NG

>> GO TO 3.

JMBIA0069ZZ

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 dur-
ing the vehicle is stopped while the en-
gine is running, even when EVAP 
canister purge volume control solenoid 
valve is completely closed.

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

lenoid valve
(The valve is stuck open.)

• EVAP canister vent control valve
• EVAP canister
• Hoses

(Hoses are connected incorrectly or 
clogged.)

B

The canister purge flow is detected dur-
ing the specified driving conditions, even 
when EVAP canister purge volume con-
trol solenoid valve is completely closed.

EC-296

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

3.

PERFORM DTC CONFIRMATION PROCEDURE B

With CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Turn ignition switch ON.

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Turn ignition switch ON.

6.

Select “PURG VOL CN/V P1444” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode with
CONSULT-III.

7.

Touch “START”.

8.

Start engine and let it idle until “TESTING” on CONSULT-III changes to “COMPLETED”. (It will take
approximately 10 seconds.)
If “TESTING” is not displayed after 5 minutes, retry from step 2.

9.

Touch “SELF-DIAG RESULTS”.

Which is displayed on CONSULT-III screen?

OK

>> INSPECTION END

NG

>> Go to 

EC-296, "Diagnosis Procedure"

.

4.

PERFORM DTC CONFIRMATION PROCEDURE A

With GST

1.

Turn ignition switch ON.

2.

Set voltmeter probes to ECM harness connector terminals.

3.

Start engine and wait at least 60 seconds.

4.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to 

EC-296, "Diagnosis Procedure"

.

NO

>> GO TO 5.

5.

PERFORM DTC CONFIRMATION PROCEDURE B

With GST

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Turn ignition switch ON.

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Start engine and let it idle for at least 20 seconds.

6.

Check 1st trip DTC.

Is 1st trip DTC displayed?

YES

>> Go to 

EC-296, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005236884

1.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect EVAP canister purge volume control solenoid valve harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between EVAP canister purge volume control solenoid valve harness connector and
ground.

ECM

Voltage (V)

Connector

+

–

Terminal

Terminal

M107

106

(Fuel tank temperature sensor signal)

128

(Sensor ground)

3.1 - 4.0