Nissan Altima L32. Manual - part 546

P0441 EVAP CONTROL SYSTEM

EC-1305

< COMPONENT DIAGNOSIS >

[VQ35DE]

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P0441 EVAP CONTROL SYSTEM

DTC Logic

INFOID:0000000004362151

DTC DETECTION LOGIC

NOTE:

If DTC P0441 is displayed with other DTC such as P2122, P2123, P2127, P2128 or P2138, first perform

trouble diagnosis for other DTC.

In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions.

Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP

canister purge volume control solenoid valve is open to admit purge flow. Purge flow exposes the EVAP con-

trol system pressure sensor to intake manifold vacuum.

Under normal conditions (non-closed throttle), sensor output voltage indicates if pressure drop and purge flow

are adequate. If not, a malfunction is determined.

DTC CONFIRMATION PROCEDURE

1.

INSPECTION START

Will CONSULT-III be used?
Will CONSULT-III be used?

YES

>> GO TO 2.

NO

>> GO TO 6.

2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-

ing the next test.

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

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0441

EVAP control system in-
correct purge flow

EVAP control system does not operate proper-
ly, EVAP control system has a leakage between 
intake manifold and EVAP control system pres-
sure sensor.

• EVAP canister purge volume control so-

lenoid valve stuck closed

• EVAP control system pressure sensor 

and the circuit

• Loose, disconnected or improper con-

nection of rubber tube

• Blocked rubber tube
• Cracked EVAP canister
• EVAP canister purge volume control so-

lenoid valve circuit

• Accelerator pedal position sensor
• Blocked purge port
• EVAP canister vent control valve

PBIB1026E

EC-1306

< COMPONENT DIAGNOSIS >

[VQ35DE]

P0441 EVAP CONTROL SYSTEM

2. Turn ignition switch ON.

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

TESTING CONDITION:

Always perform test at a temperature of 5

°C (41°F) or more.

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE-I

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

5. Start engine and let it idle for at least 70 seconds.

6. Select “PURG FLOW P0441” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode with CON-

SULT-III.

7. Touch “START”.
Is “COMPLETED” displayed on CONSULT-III screen?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

PERFORM DTC CONFIRMATION PROCEDURE-II

When the following conditions are met, “TESTING” will be displayed on the CONSULT-III screen. Maintain the

conditions continuously until “TESTING” changes to “COMPLETED”. (It will take at least 35 seconds.)

CAUTION:

Always drive vehicle at a safe speed.

If “TESTING” does not change for a long time, retry from step 2.
Is “COMPLETED” displayed on CONSULT-III screen?

YES

>> GO TO 5.

NO

>> Perform DTC CONFIRMATION PROCEDURE again. GO TO 3.

5.

PERFORM DTC CONFIRMATION PROCEDURE-III

Touch “SELF-DIAG RESULTS”.
Which is displayed on CONSULT-III screen?

OK

>> INSPECTION END

NG

>> Go to 

EC-1307, "Diagnosis Procedure"

.

6.

PERFORM COMPONENT FUNCTION CHECK

Perform component function check. Refer to 

EC-1306, "Component Function Check"

.

NOTE:

Use component function check to check the overall monitoring function of the EVAP control system purge flow

monitoring. During this check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-1307, "Diagnosis Procedure"

.

Component Function Check

INFOID:0000000004362152

1.

PERFORM COMPONENT FUNCTION CHECK

Without CONSULT-III

Selector lever

Suitable position

VHCL SPEED SE

32 - 120 km/h (20 - 75 mph)

ENG SPEED

500 - 3,000 rpm

B/FUEL SCHDL

1.3 - 9.0 msec

COOLAN TEMP/S

More than 0

°C (32°F)

P0441 EVAP CONTROL SYSTEM

EC-1307

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1. Lift up drive wheels.

2. Start engine (ESP switch OFF) and warm it up to normal operating temperature.

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

4. Turn ignition switch ON.

5. Turn ignition switch OFF, wait at least 10 seconds.

6. Start engine and wait at least 70 seconds.

7. Set voltmeter probes to ECM harness connector terminals under

the following conditions.

8. Check EVAP control system pressure sensor value at idle speed

and note it.

9. Establish and maintain the following conditions for at least 1 minute.

10. Verify that EVAP control system pressure sensor value stays 0.1 V less than the value at idle speed (mea-

sured at step 6) for at least 1 second.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-1307, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000004362153

1.

CHECK EVAP CANISTER

1. Turn ignition switch OFF.

2. Check EVAP canister for cracks.
Is the inspection result normal?

YES-1 >> With CONSULT-III: GO TO 2.

YES-2 >> Without CONSULT-III: GO TO 3.

NO

>> Replace EVAP canister.

2.

CHECK PURGE FLOW

With CONSULT-III

1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser-

vice port and install vacuum gauge. For the location of EVAP service port, refer to 

EC-1116, "System Dia-

gram"

.

2. Start engine and let it idle.

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

4. Touch “Qd” and “Qu” on CONSULT-III screen to adjust “PURG VOL CONT/V” opening and check vacuum

existence.

Is the inspection result normal?

ECM

Connector

+

–

Terminal

Terminal

E10

86

(EVAP control system pressure sensor 

signal)

96

(Sensor ground)

Air conditioner switch

ON

Head lamp switch

ON

Rear window defogger switch

ON

Engine speed

Approx. 3,000 rpm

Gear position

Any position other than P, N or R

JMBIA1870ZZ

PURG VOL CONT/V

Vacuum

100%

Existed

0%

Not existed

EC-1308

< COMPONENT DIAGNOSIS >

[VQ35DE]

P0441 EVAP CONTROL SYSTEM

YES

>> GO TO 7.

NO

>> GO TO 4.

3.

CHECK PURGE FLOW

 Without CONSULT-III

1. Start engine and warm it up to normal operating temperature.

2. Stop engine.

3. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser-

vice port and install vacuum gauge. For the location of EVAP service port, refer to 

EC-1116, "System Dia-

gram"

.

4. Start engine and let it idle.

Do not depress accelerator pedal even slightly.

5. Check vacuum gauge indication before 60 seconds pass after starting engine.

6. Rev engine up to 2,000 rpm after 100 seconds pass after starting engine.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 4.

4.

CHECK EVAP PURGE LINE

1. Turn ignition switch OFF.

2. Check EVAP purge line for improper connection or disconnection.

Refer to 

EC-1116, "System Diagram"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair EVAP purge line.

5.

CHECK EVAP PURGE HOSE AND PURGE PORT

1. Disconnect purge hoses connected to EVAP service port A and

EVAP canister purge volume control solenoid valve B.

2. Blow air into each hose and EVAP purge port C.

3. Check that air flows freely.
Is the inspection result normal?

YES-1 >> With CONSULT-III: GO TO 6.

YES-2 >> Without CONSULT-III: GO TO 7.

NO

>> Repair or clean hoses and/or purge port.

6.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-III

1. Start engine.

Vacuum should not exist.

Vacuum should exist.

SEF367U

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