Nissan Frontier D22. Manual - part 602

 

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Nissan Frontier D22. Manual - part 602

 

 

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

EC-1511

[VG33ER]

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EC

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE

PFP:14920

Description

UBS00DXN

SYSTEM DESCRIPTION

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

UBS00DXO

Specification data are reference values.

Sensor

Input Signal to ECM

ECM function

Actuator

Camshaft position sensor

Engine speed

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

Ignition switch

Start signal

Throttle position sensor

Throttle position

Throttle position switch

Closed throttle position

Heated oxygen sensors 1

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

Fuel tank temperature sensor

Fuel temperature in fuel tank

Vehicle speed sensor

Vehicle speed

SEF337U

MONITOR ITEM

CONDITION

SPECIFICATION

PURG VOL C/V

Engine: After warming up

Air conditioner switch OFF

Shift lever: N (A/T), Neutral (M/T)

No load

Idle (Vehicle stopped)

0%

2,000 rpm

EC-1512

[VG33ER]

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

On Board Diagnosis Logic

UBS00DXP

DTC Confirmation Procedure

UBS00DXQ

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 5 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-1515, "Diagnostic Proce-

dure"

 .

 WITH GST

Follow the procedure “WITH CONSULT-II”. 

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0444

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

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

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

EC-1513

[VG33ER]

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Wiring Diagram

UBS00DXR

BBWA1085E

EC-1514

[VG33ER]

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than the ECM terminals, such as the ground.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

4

OR/B

ECM relay
(Self shutoff)

[Engine is running]
[Ignition switch: OFF]

For a few seconds after turning ignition switch 
OFF

0 - 1.5V

[Ignition switch: OFF]

A few seconds passed after turning ignition 
switch OFF

BATTERY VOLTAGE
(11 - 14V)

5

R/Y

EVAP canister purge 
volume control sole-
noid valve

[Engine is running]

Idle speed

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

 Engine speed is 2,000 rpm (More than 100 
seconds after starting engine)

BATTERY VOLTAGE

(11 - 14V)

67

B/P

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

72

B/P

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

117

B/P

Current return

[Engine is running]

Idle speed

BATTERY VOLTAGE
(11 - 14V)

SEF994U

SEF995U

 

 

 

 

 

 

 

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