Infiniti M35/M45 Y50. Manual - part 658

DTC P0442 EVAP CONTROL SYSTEM

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10. 

CHECK EVAP CANISTER

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.0 kg (4.4 lb).
OK or NG

OK (With CONSULT-II)>>GO TO 12.
OK (Without CONSULT-II)>>GO TO 13.
NG

>> GO TO 11.

11. 

DETECT MALFUNCTIONING PART

Check the following.

●

EVAP canister for damage

●

EVAP hose between 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-II

1.

Disconnect vacuum hose to 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-II 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-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 15.

NG

>> GO TO 14.

14. 

CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. Refer to 

EC-814, "Vacuum Hose Drawing"

 .

OK or NG

OK

>> GO TO 15.

NG

>> Repair or reconnect the hose.

PBIB1678E

Vacuum should exist.

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DTC P0442 EVAP CONTROL SYSTEM

15. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-1121, "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-1048, "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-1144, "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-742, "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.

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-748, "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-751, "REFUELING EVAP VAPOR CUT VALVE"

 .

OK or NG

OK

>> GO TO 23.

NG

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

DTC P0442 EVAP CONTROL SYSTEM

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23. 

CHECK FUEL LEVEL SENSOR

Refer to 

DI-26, "CHECK FUEL LEVEL SENSOR UNIT"

 .

OK or NG

OK

>> GO TO 24.

NG

>> Replace fuel level sensor unit.

24. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

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DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

PFP:14920

Description

NBS005H4

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

NBS005H5

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 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

SEF337U

MONITOR ITEM

CONDITION

SPECIFICATION

PURG VOL C/V

●

Engine: After warming up

●

Selector lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle
(Accelerator pedal: Not depressed even 
slightly, after engine starting.)

0%

2,000 rpm

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