Infiniti FX35 / FX45. Manual - part 399

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

EC-357

< SERVICE INFORMATION >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Wiring Diagram

INFOID:0000000001326181

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-III.

CAUTION:

TBWM1390E

EC-358

< SERVICE INFORMATION >

[VQ35DE]

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

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 ECM terminals, such as the ground.

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

Diagnosis Procedure

INFOID:0000000001326182

1.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect EVAP canister purge volume control solenoid valve
harness connector.

3.

Turn ignition switch ON.

TER-

MI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

45

GY

EVAP canister purge volume 
control solenoid valve

[Engine is running]
• Idle speed
• Accelerator pedal is not depressed even 

slightly, after engine starting

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]
• Engine speed is about 2,000 rpm (More than 

100 seconds after starting engine)

BATTERY VOLTAGE

(11 - 14V)

111

W/B

ECM relay
(Self shut-off)

[Engine is running]
[Ignition switch: OFF]
• For a few seconds after turning ignition 

switch OFF

0 - 1.5V

[Ignition switch: OFF]
• More than a few seconds after turning igni-

tion switch OFF

BATTERY VOLTAGE
(11 - 14V)

119

120

R
R/B

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

SEC990C

SEC991C

PBIB2097E

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

EC-359

< SERVICE INFORMATION >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

4.

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

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E211, M41
• Harness connectors M82, F102
• Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R
• 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.

3.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT

FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between ECM terminal 45 and EVAP canister purge volume control solenoid
valve terminal 2. Refer to Wiring Diagram.

4.

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

OK or NG

OK (With CONSULT-III)>>GO TO 4.
OK (Without CONSULT-III)>>GO TO 5.
NG

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

4.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

 With CONSULT-III

1.

Reconnect all harness connectors disconnected.

2.

Start engine.

3.

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

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

5.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-360, "Component Inspection"

.

OK or NG

OK

>> GO TO 6.

NG

>> Replace EVAP canister purge volume control solenoid valve.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

EC-139

.

>> INSPECTION END

Voltage: Battery voltage

PBIB0148E

Continuity should exist.

EC-360

< SERVICE INFORMATION >

[VQ35DE]

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

Component Inspection

INFOID:0000000001326183

EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

 With CONSULT-III

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

 Without CONSULT-III

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

Removal and Installation

INFOID:0000000001326184

EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EM-19

.

Condition

(PURG VOL CONT/V value)

Air passage continuity 

between A and B

100%

Yes

0%

No

PBIB0149E

Condition

Air passage continuity 

between A and B

12V direct current supply between 
terminals 1 and 2

Yes

No supply

No

PBIB0150E