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Nissan Frontier. Manual - part 425

P0441 EVAP CONTROL SYSTEM

EC-271

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

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.

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 screen. Maintain

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

If TESTING does not change 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-

271, "Diagnosis Procedure"

Overall Function Check

INFOID:0000000009480933

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 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 86 (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-271, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000009480934

CHECK EVAP CANISTER

1. Turn ignition switch OFF.

2. Check EVAP canister for cracks.
OK or NG

OK (With CONSULT)>>GO TO 2.

OK (Without CONSULT)>>GO TO 3.

>> Replace EVAP canister. Refer to

FL-14, "Removal and Installation"

CHECK PURGE FLOW

With CONSULT

Selector lever

Suitable position

VHCL SPEED SE

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

ENG SPEED

500 - 3,800 rpm

B/FUEL SCHDL

1.0 - 10.0 msec

COOLAN TEMP/S

More than 0

°C (32°F)

Air conditioner switch

Headlamp switch

Engine speed

Approx. 3,000 rpm

Shift lever

Any position other than P, N or R

EC-272

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0441 EVAP CONTROL SYSTEM

1. Disconnect vacuum hose connected to EVAP canister purge

volume control solenoid valve at EVAP service port and install

vacuum gauge.

2. Start engine and let it idle.

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

CONSULT.

4. Rev engine up to 2,000 rpm.

5. Touch “Qd” and “Qu” on CONSULT 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

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 service port and install

vacuum gauge.

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 start-

ing 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-41, "Description"

OK or NG

>> GO TO 5.

>> Repair it.

CHECK EVAP PURGE HOSE AND PURGE PORT

BBIA0620E

PURG VOL CONT/V

VACUUM

100%

Should exist

Should not exist

Vacuum should not exist.

Vacuum should exist.

BBIA0620E

P0441 EVAP CONTROL SYSTEM

EC-273

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

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.
OK or NG

OK (With CONSULT)>>GO TO 6.

OK (Without CONSULT)>>GO TO 7.

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

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT

1. Start engine.

2. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT. Check that engine speed varies

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-289, "Component Inspection"

OK or NG

>> GO TO 8.

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

EM-27, "Exploded View"

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1. Disconnect EVAP control system pressure sensor harness connector.

2. Check that water is not inside connectors.
OK or NG

>> GO TO 9.

>> Replace EVAP control system pressure sensor. Refer to

FL-14, "Removal and Installation"

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION

Refer to DTC Confirmation Procedure for DTC P0452

EC-302, "DTC Confirmation Procedure"

, P0453

EC-

306, "DTC Confirmation Procedure"

OK or NG

>> GO TO 10.

>> Replace EVAP control system pressure sensor. Refer to

FL-14, "Removal and Installation"

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

SEF367U

SEF368U

EC-274

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0441 EVAP CONTROL SYSTEM

>> GO TO 11.

>> Clean the rubber tube using an air blower.

11.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to

EC-292, "Component Inspection"

OK or NG

>> GO TO 12.

>> Replace EVAP canister vent control valve. Refer to

FL-14, "Removal and Installation"

12.

CHECK EVAP PURGE LINE

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

Refer to

EC-41, "Description"

OK or NG

>> GO TO 13.

>> Replace it.

13.

CLEAN EVAP PURGE LINE

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

>> GO TO 14.

14.

CHECK INTERMITTENT INCIDENT

Refer to

GI-42, "Intermittent Incident"

>> INSPECTION END

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