Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P0441 EVAP control system
DTC Logic

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 nonclosed throttle conditions.

Purge volume is related to air intake volume. Under normal purge conditions (nonclosed 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 (nonclosed throttle), sensor output voltage indicates if pressure drop and purge flow are adequate. If not, a malfunction is determined.

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0441 EVAP PURG FLOW/MON (EVAP control system incorrect purge flow) EVAP control system does not operate properly, EVAP control system has a leak between intake manifold and EVAP control system pressure sensor.
  • EVAP canister purge volume control solenoid valve stuck closed
  • EVAP control system pressure sensor and the circuit
  • Loose, disconnected or improper connection of rubber tube
  • Blocked rubber tube
  • Cracked EVAP canister
  • EVAP canister purge volume control solenoid valve circuit
  • Accelerator pedal position sensor
  • Blocked purge port
  • EVAP canister vent control valve

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure 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.

Will CONSULT be used?

YES >> GO TO 2.

NO >> GO TO 5.

2.PERFORM DTC CONFIRMATION PROCEDUREI

WITH CONSULT

TESTING CONDITION: Always perform test at a temperature of 5C (41F) or more.

  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 of "ENGINE" using CONSULT.
  7. Touch "START".

Is "COMPLETED" displayed on CONSULT screen?

YES >> GO TO 4.

NO >> GO TO 3.

3.PERFORM DTC CONFIRMATION PROCEDUREII

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.) 

CAUTION: Always drive vehicle at a safe speed.

NOTE: If "TESTING" does not change for a long time, retry from step 2.

Is "COMPLETED" displayed on CONSULT screen?

YES >> GO TO 4.

NO >> Perform DTC CONFIRMATION PROCEDURE again. GO TO 2.

4.PERFORM DTC CONFIRMATION PROCEDUREIII

Touch "SELFDIAG RESULTS".

Which is displayed on CONSULT screen?

OK >> INSPECTION END

NG >> Proceed to EC, "Diagnosis Procedure".

5.PERFORM COMPONENT FUNCTION CHECK

WITH GST

Perform component function check. Refer to EC, "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 >> Proceed to EC, "Diagnosis Procedure".

    More about «P0441 EVAP control system»:

    DTC Logic

    Component Function Check

    Diagnosis Procedure

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