Infiniti EX35. Manual - part 634

EC-278

< COMPONENT DIAGNOSIS >

[VQ35HR]

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Description

INFOID:0000000003133428

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.

DTC Logic

INFOID:0000000003133429

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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:
Always perform test at a temperature of 5

°

C (41

°

F) or more.

Do you have CONSULT-III?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Turn ignition switch ON.

4.

Select “PURG VOL CN/V P1444” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode with
CONSULT-III.

5.

Touch “START”.

6.

Start engine and let it idle until “TESTING” on CONSULT-III changes to “COMPLETED”. (It will take
approximately 10 seconds.)
If “TESTING” is not displayed after 5 minutes, retry from step 2.

7.

Touch “SELF-DIAG RESULTS”.

Which is displayed on CONSULT-III screen?

OK

>> INSPECTION END

NG

>> Go to 

EC-279, "Diagnosis Procedure"

.

3.

PERFORM DTC CONFIRMATION PROCEDURE

JMBIA0069ZZ

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0443

EVAP canister purge 
volume control solenoid 
valve

The canister purge flow is detected during the 
specified driving conditions, even when EVAP 
canister purge volume control solenoid valve is 
completely closed.

• EVAP control system pressure sensor
• EVAP canister purge volume control so-

lenoid valve
(The valve is stuck open.)

• EVAP canister vent control valve
• EVAP canister
• Hoses

(Hoses are connected incorrectly or 
clogged.)

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-279

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

With GST

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Start engine and let it idle for at least 20 seconds.

4.

Check 1st trip DTC.

Is 1st trip DTC displayed?

YES

>> Go to 

EC-279, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003133430

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.

4.

Check the voltage between EVAP canister purge volume control solenoid valve harness connector and
ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E106, M6
• Harness connectors M116, F103
• 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 the continuity between EVAP canister purge volume control solenoid valve harness connector and
ECM harness connector.

4.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors F104, F105
• 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.

EVAP canister purge volume control solenoid valve

Ground

Voltage

Connector

Terminal

F7

1

Ground

Battery voltage

EVAP canister purge volume control solenoid valve

ECM

Continuity

Connector

Terminal

Connector

Terminal

F7

2

F101

21

Existed

EC-280

< COMPONENT DIAGNOSIS >

[VQ35HR]

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

5.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1.

Disconnect EVAP control system pressure sensor harness connector.

2.

Check connectors for water.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace EVAP control system pressure sensor.

6.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-296, "Component Inspection"

.

Is the inspection result normal?

YES-1 >> With CONSULT-III: GO TO 7.
YES-2 >> Without CONSULT-III: GO TO 8.
NO

>> Replace EVAP control system pressure sensor.

7.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-III

1.

Turn ignition switch OFF.

2.

Reconnect harness connectors disconnected.

3.

Start engine.

4.

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

Does engine speed vary according to the valve opening?

YES

>> GO TO 9.

NO

>> GO TO 8.

8.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-281, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace EVAP canister purge volume control solenoid valve.

9.

CHECK RUBBER TUBE FOR CLOGGING

1.

Disconnect rubber tube connected to EVAP canister vent control valve.

2.

Check the rubber tube for clogging.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Clean the rubber tube using an air blower.

10.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-288, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Replace EVAP canister vent control valve.

11.

CHECK IF EVAP CANISTER SATURATED WITH WATER

1.

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

Water should not exist.

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-281

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2.

Check if water will drain from EVAP canister (1).

Does water drain from the EVAP canister?

YES

>> GO TO 12.

NO

>> GO TO 14.

12.

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 2.1 kg (4.6 lb).

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> GO TO 13.

13.

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.

14.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000003133431

1.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-III

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.

4.

Turn ignition switch ON.

5.

Select “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-III.

6.

Touch “Qd” and “Qu” on CONSULT-III screen to adjust “PURG
VOL CONT/V” opening and check air passage continuity of
EVAP canister purge volume control solenoid valve under the
following conditions.

Without CONSULT-III

1.

Turn ignition switch OFF.

2.

Disconnect EVAP canister purge volume control solenoid valve harness connector.

3.

Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.

2

: EVAP canister vent control valve

PBIB2731E

Condition

(PURG VOL CONT/V value)

Air passage continuity 

between (A) and (B)

100%

Existed

0%

Not existed

JMBIA0068ZZ