Nissan Sentra. Manual - part 400

EC-296

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Check the EVAP canister purge volume control solenoid valve. Refer to 

EC-296, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace EVAP canister purge volume control solenoid valve. Refer to 

EM-27, "Exploded View"

.

8.

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 9.

NO

>> Clean the rubber tube using an air blower.

9.

CHECK EVAP CANISTER VENT CONTROL VALVE

Check the EVAP canister vent control valve. Refer to 

EC-303, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Replace EVAP canister vent control valve. Refer to 

FL-15, "Removal and Installation"

.

10.

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

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

attached.

2. Check if water will drain from EVAP canister.
Does water drain from the EVAP canister?

YES

>> GO TO 11.

NO

>> Check intermittent incident. Refer to 

GI-39, "Intermittent

Incident"

.

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 2.1 kg (4.6 lb).
Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NO

>> 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. Refer to 

FL-15, "Removal and Installation"

.

Component Inspection

INFOID:0000000009758538

1.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT

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 of “ENGINE” using CONSULT.

PBIB1213E

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

EC-297

< DTC/CIRCUIT DIAGNOSIS >

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6. Touch “Qd” and “Qu” on CONSULT screen to adjust “PURG

VOL C/V” opening and check air passage continuity of EVAP

canister purge volume control solenoid valve as per the follow-

ing conditions.

Without CONSULT

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.

4. Check air passage continuity of EVAP canister purge volume control solenoid valve as per the following

conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace EVAP canister purge volume control solenoid valve. Refer to 

EM-27, "Exploded View"

.

Condition

(PURG VOL C/V value)

Air passage continuity 

between (A) and (B)

100%

Existed

0%

Not existed

PBIB0149E

Condition

Air passage continuity 

between (A) and (B)

12 V direct current supply between 
terminals 1 and 2

Existed

No supply

Not existed

EC-298

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE

DTC Logic

INFOID:0000000009758539

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

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

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

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

2. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to 

EC-298, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009758540

1.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY

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.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0444

PURG VOLUME CONT/V
(Evaporative emission system 
purge control valve circuit open)

An excessively low voltage signal is sent to 
ECM through the EVAP canister purge vol-
ume control solenoid valve.

• Harness or connectors

(EVAP canister purge volume control 
solenoid valve circuit is open or short-
ed.)

• EVAP canister purge volume control 

solenoid valve

P0445

PURG VOLUME CONT/V
(Evaporative emission system 
purge control valve circuit short-
ed)

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

• Harness or connectors

(EVAP canister purge volume control 
solenoid valve circuit is shorted.)

• EVAP canister purge volume control 

solenoid valve

+

−

Voltage

EVAP canister purge vol-

ume control solenoid valve

Connector

Terminal

F13

1

Ground

Battery voltage

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 

VALVE

EC-299

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NO

>> GO TO 2.

2.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R harness connector.

3. Check the continuity between EVAP canister purge volume control solenoid valve harness connector and

IPDM E/R harness connector.

4. Also check harness for short to ground.
Is the inspection result normal?

YES-1 ( With CONSULT)>>GO TO 4.
YES-2 ( Without CONSULT)>>GO TO 5.

NO

>> Repair or replace error-detected parts.

3.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE GROUND CIRCUIT

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 power.
Is the inspection result normal?

YES-1 ( With CONSULT)>>GO TO 4.
YES-2 ( Without CONSULT)>>GO TO 5.

NO

>> Repair or replace error-detected parts.

4.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT

1. Reconnect all harness connectors disconnected.

2. Start engine.

3. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.

4. Check that engine speed varies according to the valve opening.
Does engine speed vary according to the valve opening?

YES

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NO

>> GO TO 5.

5.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Check the EVAP canister purge volume control solenoid valve. Refer to 

EC-300, "Component Inspection

(EVAP Canister Purge Volume Control Solenoid Valve)"

. 

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NO

>> Replace EVAP canister purge volume control solenoid valve. Refer to 

EM-27, "Exploded View"

.

+

−

Continuity

EVAP canister purge vol-

ume control solenoid valve

IPDM E/R

Connector

Terminal

Connector

Terminal

F13

1

E45

25

Existed

+

−

Continuity

EVAP canister purge vol-

ume control solenoid valve

ECM

Connector

Terminal

Connector

Terminal

F13

2

F24

17

Existed