Nissan Frontier. Manual - part 427

P0442 EVAP CONTROL SYSTEM

EC-279

< DTC/CIRCUIT DIAGNOSIS >

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EC

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2. Does water drain from the EVAP canister?
Yes or No

Yes

>> GO TO 10.

No (With CONSULT)>>GO TO 12.

No (Without CONSULT)>>GO TO 13.

10.

CHECK EVAP CANISTER

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sen-

sorattached.

The weight should be less than 2.0 kg (4.4 lb).
OK or NG

OK (With CONSULT)>>GO TO 12.

OK (Without CONSULT)>>GO TO 13.

NG

>> GO TO 11.

11.

DETECT MALFUNCTIONING PART

Check the following.

• EVAP canister for damage

• EVAP hose connected to EVAP canister and vehicle frame for clogging or poor connection

>> Repair hose or replace EVAP canister.

12.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT

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

2. Start engine.

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

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

5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.

OK or NG

OK

>> GO TO 15.

NG

>> GO TO 14.

13.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

Without CONSULT

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 15.

NG

>> GO TO 14.

14.

CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. Refer to 

EC-41, "Description"

.

OK or NG

BBIA0558E

Vacuum should exist.

Vacuum should exist.

EC-280

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P0442 EVAP CONTROL SYSTEM

OK

>> GO TO 15.

NG

>> Repair or reconnect the hose.

15.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-289, "Component Inspection"

.

OK or NG

OK

>> GO TO 16.

NG

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

EM-27, "Exploded View"

.

16.

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to 

EC-241, "Component Inspection"

.

OK or NG

OK

>> GO TO 17.

NG

>> Replace fuel level sensor unit. Refer to 

FL-10, "Removal and Installation"

.

17.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-304, "Component Inspection"

.

OK or NG

OK

>> GO TO 18.

NG

>> Replace EVAP control system pressure sensor. Refer to 

FL-14, "Removal and Installation"

.

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-451

.

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.

20.

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-451

.

OK or NG

OK

>> GO TO 21.

NG

>> Repair or replace hoses and tubes.

21.

CHECK RECIRCULATION LINE

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

improper connection.
OK or NG

OK

>> GO TO 22.

NG

>> Repair or replace hoses, tubes or fuel filler tube.

22.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-453, "Component Inspection"

.

OK or NG

OK

>> GO TO 23.

NG

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

FL-6, "Removal and Installation"

.

23.

CHECK FUEL LEVEL SENSOR

Refer to 

MWI-35, "Component Inspection"

.

OK or NG

OK

>> GO TO 24.

P0442 EVAP CONTROL SYSTEM

EC-281

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NG

>> Replace fuel level sensor unit. Refer to 

FL-10, "Removal and Installation"

.

24.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009480938

FUEL TANK VACUUM RELIEF VALVE (BUILT INTO 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.

6. If out of specification, replace fuel filler cap as an assembly.

CAUTION:

Use only a genuine fuel filler cap as a replacement. If an incor-

rect fuel filler cap is used, the MIL may illuminate.

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-282

< DTC/CIRCUIT DIAGNOSIS >

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P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Description

INFOID:0000000009480939

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 though 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 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.

On Board Diagnosis Logic

INFOID:0000000009480940

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 volume 
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

PBIB2057E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0443
0443

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 so-

lenoid valve
(EVAP canister purge volume control so-
lenoid 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.