P0441

P0441 EVAP CONTROL SYSTEM





DTC Logic

DTC DETECTION LOGIC
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 control 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
Do you have CONSULT-III?
Do you have CONSULT-III?
YES - GO TO 2.
NO - GO TO 4.
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following 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:
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. Activate "INSPECTION MODE 1" ( Mode 1) to start engine, and warm up engine 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. Turn ignition switch ON (READY).
6. Select "PURG FLOW P0441" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT-III.
7. Touch "START".
8. Depress the accelerator pedal to start engine, then keep engine running until "TESTING" changes to "COMPLETED". (It will take at most 10 seconds.)
9. Touch "SELF-DIAG RESULT".
Which is displayed on CONSULT-III screen?
OK - INSPECTION END
NG - Go to "Diagnosis Procedure".
4.PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to "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 "Diagnosis Procedure".




Component Function Check
1.PERFORM COMPONENT FUNCTION CHECK
Without CONSULT-III
1. Lift up the vehicle.
2. Activate "INSPECTION MODE 1" ( Mode 1) to start engine, and warm up engine to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
5. Turn ignition switch OFF and wait at least 10 seconds.






6. Activate "INSPECTION MODE 1" ( Mode 1) to start engine, and wait at least 150 seconds.
7. Set voltmeter probes to ECM harness connector and ground.






8. Check EVAP control system pressure sensor value when vehicle is stopped 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 0.1V less than the value when vehicle is stopped (measured at step 8) for at least 1 second.
Is the inspection result normal?
YES - INSPECTION END
NO - Go to "Diagnosis Procedure".




Diagnosis Procedure
1.CHECK EVAP CANISTER
1. Turn ignition switch OFF.
2. Check EVAP canister assembly 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 service port and install vacuum gauge. For the location of EVAP service port, refer to System Diagram.
2. Turn ignition switch ON (READY).
3. Perform "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.






Is the inspection result normal?
YES - GO TO 7.
NO - GO TO 4.
3.CHECK PURGE FLOW
Without CONSULT-III
1. Activate "INSPECTION MODE 1" ( Mode 1) to start engine, and warm up engine to normal operating temperature.
2. Turn ignition switch OFF.
3. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port and install vacuum gauge. For the location of EVAP service port, refer to System Diagram.
4. Lift up the vehicle.
5. Activate "INSPECTION MODE 1" ( Mode 1) to start engine, and let engine idle.
6. Wait at least 150 seconds.
7. Vehicle speed is 0 km/h (0 MPH).
8. Check vacuum hose for vacuum.

Vacuum should not exist.

9. Drive vehicle at a speed of 70 km/h (43 MPH) or more.
10. Check vacuum hose for vacuum.

Vacuum should exist.

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 System Diagram.
Is the inspection result normal?
YES - GO TO 5.
NO - Repair it.
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. Turn ignition switch ON (READY).
2. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III. Check that engine speed varies according to the valve opening.
Is the inspection result normal?
YES - GO TO 8.
NO - GO TO 7.
7.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to P0443.
Is the inspection result normal?
YES - GO TO 8.
NO - Replace EVAP canister purge volume control solenoid valve.
8.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check connectors for water.

Water should not exist.

Is the inspection result normal?
YES - GO TO 9.
NO - Replace EVAP control system pressure sensor.
9.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION
Refer to P0452 for DTC P0452, P0453 for DTC P0453.
Is the inspection result normal?
YES - GO TO 10.
NO - 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.
Is the inspection result normal?
YES - GO TO 11.
NO - Clean the rubber tube using an air blower.
11.CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to P0447.
Is the inspection result normal?
YES - GO TO 12.
NO - Replace EVAP canister vent control valve.
12.CHECK EVAP PURGE LINE
Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks. Refer to System Diagram.
Is the inspection result normal?
YES - GO TO 13.
NO - 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 Intermittent Incident.
- INSPECTION END