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Nissan Titan A60. Manual - part 401

EC-270

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0441 EVAP CONTROL SYSTEM

TESTING CONDITION:

Always perform test at a temperature of 5

°C (41°F) or more.

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

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

SULT-III.

5. Touch “START”.

If “COMPLETED” is displayed, go to step 7.

6. 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.)

If “TESTING” is not changed for a long time, retry from step 2.

7. Make sure that “OK” is displayed after touching “SELF-DIAG RESULTS”. If “NG” is displayed, refer to

EC-

270, "Diagnosis Procedure"

Overall Function Check

INFOID:0000000006158700

Use this procedure 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.

WITH GST

1. Lift up drive wheels.

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

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

4. Start engine and wait at least 70 seconds.

5. Set voltmeter probes to ECM terminals 32 (EVAP control system

pressure sensor signal) and ground.

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

and note it.

7. Establish and maintain the following conditions for at least 1

minute.

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

sured at step 6) for at least 1 second.

9. If NG, go to

EC-270, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000006158701

CHECK EVAP CANISTER

1. Turn ignition switch OFF.

2. Check EVAP canister for cracks.
OK or NG

OK (With CONSULT-III)>>GO TO 2.

OK (Without CONSULT-III)>>GO TO 3.

>> Replace EVAP canister.

Selector lever

Suitable position

VHCL SPEED SE

32 - 120 km/h (20 - 75 MPH)

ENG SPEED

500 - 3,000 rpm

B/FUEL SCHDL

1.0 - 12.0 msec

COOLAN TEMP/S

0 - 119

°C (32 - 246°F)

Air conditioner switch

Headlamp switch

Engine speed

Approx. 3,000 rpm

Gear position

Any position other than P, N or R

PBIB1109E

P0441 EVAP CONTROL SYSTEM

EC-271

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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-31, "Description"

2. Start engine and let it idle.

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

4. Rev engine up to 2,000 rpm.

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

existence.

OK or NG

>> GO TO 7.

>> GO TO 4.

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-31, "Description"

4. Start engine and let it idle.

Do not depress accelerator pedal even slightly.

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

6. Revving engine up to 2,000 rpm after 100 seconds passed after starting engine.

OK or NG

>> GO TO 7.

>> GO TO 4.

CHECK EVAP PURGE LINE

1. Turn ignition switch OFF.

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

Refer to

EC-31, "Description"

OK or NG

>> GO TO 5.

>> Repair it.

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.

PURG VOL CONT/V

Vacuum

100%

Should exist.

Should not exist.

Vacuum should not exist.

Vacuum should exist.

SEF367U

EC-272

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0441 EVAP CONTROL SYSTEM

3. Check that air flows freely.
OK or NG

OK (With CONSULT-III)>>GO TO 6.

OK (Without CONSULT-III)>>GO TO 7.

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

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-III

1. Start engine.

2. 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

>> GO TO 8.

>> GO TO 7.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to

EC-288, "Component Inspection"

OK or NG

>> GO TO 8.

>> Replace EVAP canister purge volume control solenoid valve.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1. Disconnect EVAP control system pressure sensor harness connector.

2. Check connectors for water.

OK or NG

>> GO TO 9.

>> Replace EVAP control system pressure sensor.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION

Refer to DTC Confirmation Procedure for DTC P0452,

EC-301, "DTC Confirmation Procedure"

and P0453,

EC-305, "DTC Confirmation Procedure"

OK or NG

>> GO TO 10.

>> Replace EVAP control system pressure sensor.

10.

CHECK RUBBER TUBE FOR CLOGGING

1. Disconnect rubber tube connected to EVAP canister vent control valve.

2. Check the rubber tube for clogging.
OK or NG

>> GO TO 11.

>> Clean the rubber tube using an air blower.

11.

CHECK DRAIN FILTER

Refer to

EC-273, "Component Inspection"

OK or NG

>> GO TO 12.

>> Replace drain filter.

12.

CHECK EVAP CANISTER VENT CONTROL VALVE

SEF368U

Water should not exist.

P0441 EVAP CONTROL SYSTEM

EC-273

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

Refer to

EC-291, "Component Inspection"

OK or NG

>> GO TO 13.

>> Replace EVAP canister vent control valve.

13.

CHECK EVAP PURGE LINE

Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.

Refer to

EC-31, "Description"

OK or NG

>> GO TO 14.

>> Replace it.

14.

CLEAN EVAP PURGE LINE

Clean EVAP purge line (pipe and rubber tube) using air blower.

>> GO TO 15.

15.

CHECK INTERMITTENT INCIDENT

Refer to

GI-36, "How to Check Terminal"

and

GI-39, "Intermittent Incident"

>> INSPECTION END

Component Inspection

INFOID:0000000006158702

DRAIN FILTER

1. Check visually for insect nests in the drain filter air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
4. Blow air into port A and check that it flows freely out of port B.
5. Block port B.
6. Blow air into port A and check that there is no leakage.
7. If NG, replace drain filter.

PBIB3641E

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