Nissan Frontier D22. Manual - part 603

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

EC-1515

[VG33ER]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Diagnostic Procedure

UBS00DXS

1. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIR-

CUIT

1.

Turn ignition switch OFF.

2.

Disconnect EVAP canister purge volume control solenoid valve
harness connector.

3.

Turn ignition switch ON.

4.

Check voltage between EVAP canister purge volume control
solenoid valve terminal 1 and ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F36, M81

●

Harness connectors M65, E43

●

Harness for open or short between EVAP canister purge volume control solenoid valve and ECM relay

>> Repair harness or connectors.

3. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIR-

CUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between ECM terminal 5 and solenoid terminal 2.
Refer to Wiring Diagram.

4.

Also check harness for short to ground and short to power.

OK or NG

OK (With CONSULT-II)>>GO TO 5.
OK (Without CONSULT-II)>>GO TO 6.
NG

>> GO TO 4.

AEC652A

Voltage: Battery voltage

SEF646W

Continuity should exist.

EC-1516

[VG33ER]

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E43, M65

●

Harness connectors M81, F36

●

Harness for open or short between EVAP canister purge volume control solenoid valve and ECM

>> Repair open circuit or short to ground or short to power in harness or connectors.

5. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

 With CONSULT-II

1.

Start engine.

2.

 Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with
CONSULT-II. Check that engine speed varies according to the
valve opening.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

 With CONSULT-II

1.

Check air passage continuity under the following conditions.

 Without CONSULT-II

1.

Check air passage continuity under the following conditions.

OK or NG

OK

>> GO TO 7.

NG

>> Replace EVAP canister purge volume control solenoid

valve.

SEF677Y

Condition

PURG VOL CONT/V value

Air passage continuity 

between A and B

100%

Yes

0%

No

SEF660U

Condition

Air passage continuity 

between A and B

12V direct current supply between 
terminals 1 and 2

Yes

No supply

No

SEF661U

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

EC-1517

[VG33ER]

C

D

E

F

G

H

I

J

K

L

M

A

EC

7. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-1297, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

EC-1518

[VG33ER]

DTC P0447 EVAP CANISTER VENT CONTROL VALVE

DTC P0447 EVAP CANISTER VENT CONTROL VALVE

PFP:14935

Component Description

UBS00DXT

The EVAP canister vent control valve is located on the EVAP canis-
ter and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal
the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the evapo-
rative emission control system is depressurized and allows “EVAP
Control System (Small Leak)” diagnosis.

CONSULT-II Reference Value in Data Monitor Mode

UBS00DXU

Specification data are reference values.

On Board Diagnosis Logic

UBS00DXV

DTC Confirmation Procedure

UBS00DXW

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.

SEF032W

SEF143S

MONITOR ITEM

CONDITION

SPECIFICATION

VENT CONT/V

●

Ignition switch: ON

OFF

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0447

EVAP canister vent con-
trol valve circuit open

An improper voltage signal is sent to ECM 
through EVAP canister vent control valve.

●

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

●

EVAP canister vent control valve