Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P0441 EVAP control system
Diagnosis Procedure

1.CHECK EVAP CANISTER

  1. Turn ignition switch OFF.
  2. Check EVAP canister for cracks.

Is the inspection result normal?

YES1 >> With CONSULT: GO TO 2.

YES2 >> Without CONSULT: GO TO 3.

NO >> Replace EVAP canister. Refer to FL, "Removal and Installation".

2.CHECK PURGE FLOW

WITH CONSULT

  1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port.
  2. Start engine and let it idle.
  3. Select "PURG VOL CONT/V" in "ACTIVE TEST" mode of "ENGINE" using CONSULT.
  4. Touch "Qd" and "Qu" on CONSULT 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

  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. For the location of EVAP service port, refer to EM, "Exploded View".
  4. Start engine and let it idle. Never depress accelerator pedal even slightly.
  5. Check vacuum gauge indication before 60 seconds pass after starting engine.

Vacuum should not exist.

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

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 EC, "EVAPORATIVE EMISSION SYSTEM : 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).

CHECK EVAP PURGE HOSE AND PURGE PORT

    3.  Check that air flows freely.

Is the inspection result normal?

YES1 >> With CONSULT: GO TO 6.

YES2 >> Without CONSULT: GO TO 7.

NO >> Repair or clean hoses and/or purge port.

CHECK EVAP PURGE HOSE AND PURGE PORT

6.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE WITH CONSULT

  1. Start engine.
  2. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode of "ENGINE" using CONSULT. Check that engine speed varies according to the valve opening.

Does engine speed vary according to the valve opening?

YES >> GO TO 8.

NO >> GO TO 7.

7.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Check the EVAP canister purge volume control solenoid valve. Refer to EC, "Component Inspection".

Is the inspection result normal?

YES >> GO TO 8.

NO >> Replace EVAP canister purge volume control solenoid valve. Refer to EM, "Exploded View".

8.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

  1. Disconnect EVAP control system pressure sensor harness connector.
  2. Check that water is not inside connectors.

Is the inspection result normal?

YES >> GO TO 9.

NO >> Replace EVAP control system pressure sensor. Refer to FL, "Removal and Installation".

9.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION

Refer to EC308, "DTC Logic" for DTC P0452, EC312, "DTC Logic" for DTC P0453.

Is the inspection result normal?

YES >> GO TO 10.

NO >> Replace EVAP control system pressure sensor. Refer to FL, "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.

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

Check the EVAP canister vent control valve. Refer to EC, "Component Inspection".

Is the inspection result normal?

YES >> GO TO 12.

NO >> Replace EVAP canister vent control valve. Refer to FL, "Removal and Installation".

12.CHECK EVAP PURGE LINE

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

Refer to EC, "EVAPORATIVE EMISSION SYSTEM : System Diagram".

Is the inspection result normal?

YES >> GO TO 13.

NO >> Repair or replace malfunctioning part.

13.CLEAN EVAP PURGE LINE

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

>> GO TO 14.

14.CHECK INTERMITTENT INCIDENT

Perform GI, "Intermittent Incident".

>> INSPECTION END

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