Infiniti G35 (V35). Manual — part 384

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-417

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EC

10.

CHECK IF EVAP CANISTER SATURATED WITH WATER

1.

Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.

2.

Does water drain from the EVAP canister?

Yes or No

Yes

>> GO TO 11.

No

>> GO TO 13.

11.

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 2.2 kg (4.9 lb).

OK or NG

OK

>> GO TO 13.

NG

>> GO TO 12.

12.

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.

13.

CHECK INTERMITTENT INCIDENT

Refer to

EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

>> INSPECTION END

Component Inspection

NBS000ZH

EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-II

Check air passage continuity of EVAP canister purge volume control
solenoid valve under the following conditions.

PBIB1031E

Condition

(PURG VOL CONT/V value)

Air passage continuity

between A and B

100%

Yes

0%

No

PBIB0149E

EC-418

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Without CONSULT-II

Check air passage continuity of EVAP canister purge volume control
solenoid valve under the following conditions.

Removal and Installation

NBS000ZI

EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to

EM-18, "INTAKE MANIFOLD COLLECTOR"

.

Condition

Air passage continuity

between A and B

12V direct current supply between
terminals 1 and 2

Yes

No supply

No

PBIB0150E

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID

VALVE

EC-419

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EC

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE

PFP:14920

Description

NBS000ST

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

NBS000SU

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

●

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-420

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID

VALVE

On Board Diagnosis Logic

NBS000SV

DTC Confirmation Procedure

NBS000SW

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:
Before performing the following procedure, confirm battery voltage is more than 11V at idle.

WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Start engine and let it idle for at least 13 seconds.

4.

If 1st trip DTC is detected, go to

EC-423, "Diagnostic Procedure"

.

WITH GST

Follow the procedure “WITH CONSULT-II” above.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0444
0444

EVAP canister purge volume
control solenoid valve circuit
open

An excessively low voltage signal is sent
to ECM through the valve

●

Harness or connectors
(The solenoid valve circuit is open or
shorted.)

●

EVAP canister purge volume control
solenoid valve

P0445
0445

EVAP canister purge volume
control solenoid valve circuit
shorted

An excessively high voltage signal is sent
to ECM through the valve

●

Harness or connectors
(The solenoid valve circuit is shorted.)

●

EVAP canister purge volume control
solenoid valve

SEF058Y