Infiniti G35 (V35). Manual - part 382

DTC P0442 EVAP CONTROL SYSTEM

EC-409

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EC

13. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

 Without CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Stop engine.

3.

Disconnect vacuum hose to 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.

OK or NG

OK

>> GO TO 16.

NG

>> GO TO 14.

14. 

CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. Refer to 

EC-108, "Vacuum Hose Drawing"

 .

OK or NG

OK

>> GO TO 15.

NG

>> Repair or reconnect the hose.

15. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-424, "Component Inspection"

 .

OK or NG

OK

>> GO TO 16.

NG

>> Replace EVAP canister purge volume control solenoid valve.

16. 

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to 

EC-348, "Component Inspection"

 .

OK or NG

OK

>> GO TO 17.

NG

>> Replace fuel level sensor unit.

17. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-448, "Component Inspection"

 .

OK or NG

OK

>> GO TO 18.

NG

>> Replace EVAP control system pressure sensor.

18. 

CHECK EVAP PURGE LINE

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

EC-33, "EVAPORATIVE EMISSION LINE DRAWING"

 .

OK or NG

OK

>> GO TO 19.

NG

>> Repair or reconnect the hose.

19. 

CLEAN EVAP PURGE LINE

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

>> GO TO 20.

Vacuum should exist.

EC-410

DTC P0442 EVAP CONTROL SYSTEM

20. 

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-39, "ON BOARD REFUELING VAPOR RECOVERY (ORVR)"

 .

OK or NG

OK

>> GO TO 21.

NG

>> Repair or replace hoses and tubes.

21. 

CHECK RECIRCULATION LINE

Check recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, looseness and
improper connection.

OK or NG

OK

>> GO TO 22.

NG

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

22. 

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-42, "REFUELING EVAP VAPOR CUT VALVE"

 .

OK or NG

OK

>> GO TO 23.

NG

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

23. 

CHECK FUEL LEVEL SENSOR

Refer to 

DI-18, "FUEL LEVEL SENSOR UNIT"

 .

OK or NG

OK

>> GO TO 24.

NG

>> Replace fuel level sensor unit.

24. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

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EC

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

PFP:14920

Description

NBS000ZB

SYSTEM DESCRIPTION

*1: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to the ECM through CAN communication line.

This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass pas-
sage in the EVAP canister purge volume control solenoid valve changes to control the flow rate. The EVAP
canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is
determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor
from the EVAP canister is regulated as the air flow changes.

COMPONENT DESCRIPTION

The EVAP canister purge volume control solenoid valve uses a ON/
OFF duty to control the flow rate of fuel vapor from the EVAP canis-
ter. 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.

CONSULT-II Reference Value in Data Monitor Mode

NBS000ZC

Specification data are reference values.

Sensor

Input Signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed*

1

EVAP canister 
purge flow control

EVAP canister purge vol-
ume control solenoid valve

Mass air flow sensor

Amount of intake air

Engine coolant temperature sensor

Engine coolant temperature

Battery

Battery voltage*

1

Throttle position sensor

Throttle position

Accelerator pedal position sensor

Accelerator pedal position

Air fuel ratio (A/F) sensor 1

Density of oxygen in exhaust gas
(Mixture ratio feedback signal)

Fuel tank temperature sensor

Fuel temperature in fuel tank

Wheel sensor

Vehicle speed*

2

SEF337U

MONITOR ITEM

CONDITION

SPECIFICATION

PURG VOL C/V

●

Engine: After warming up

●

Shift lever: P or N (A/T), Neutral 
(M/T)

●

Air conditioner switch: OFF

●

No load

Idle
(Accelerator pedal is not depressed 
even slightly, after engine starting)

0%

2,000 rpm

—

EC-412

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

On Board Diagnosis Logic

NBS000ZD

DTC Confirmation Procedure

NBS000ZE

NOTE:
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:
Always perform test at a temperature of 5

°

C (41

°

F) or more.

 WITH CONSULT-II

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.

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

5.

Touch “START”.

6.

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

7.

Make sure that “OK” is displayed after touching “SELF-DIAG RESULTS”. If “NG” is displayed, refer to 

EC-

415, "Diagnostic Procedure"

 .

 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.

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

4.

Select Service $07 with GST.

5.

If 1st trip DTC is detected, go to 

EC-415, "Diagnostic Procedure"

 .

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0443
0443

EVAP canister purge 
volume control solenoid 
valve

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

●

EVAP control system pressure sensor

●

EVAP canister purge volume control 
solenoid valve
(The valve is stuck open.)

●

EVAP canister vent control valve

●

EVAP canister

●

Hoses
(Hoses are connected incorrectly or 
clogged.)

PBIB0839E