P1444

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Description

System Description:

This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass passage in the EVAP canister purge volume control solenoid valve changes to control the flow rate. The EVAP canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the ECM. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor from the EVAP canister is regulated as the air flow changes.

COMPONENT DESCRIPTION





The EVAP canister purge volume control solenoid valve uses a ON/ OFF duty to control the flow rate of fuel vapor from the EVAP canister. The EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount of fuel vapor that will flow through the valve.

Consult-II Reference Value In Data Monitor Mode:

On Board Diagnosis Logic:

DTC Confirmation Procedure

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.

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

WITH CONSULT-II
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. Select "PURG VOL CN/V P1444" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT-II.





5. Touch "START".
6. Start engine and let it idle until "TESTING" on CONSULT-II changes to "COMPLETED". (It will take approximately 10 seconds.)
If "TESTING" is not displayed after 5 minutes, retry from step 2.
7. Make sure that "OK" is displayed after touching "SELF-DIAG RESULTS". If "NG" is displayed, refer to "Diagnostic Procedure" below.

WITH GST
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 20 seconds.
4. Select "MODE 7" with GST.
5. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

EC-PGC/V-01:

Wiring Diagram

Diagnostic Procedure Step 1 - 3:

Diagnostic Procedure Step 4 - 8:

Diagnostic Procedure Step 9 - 14:

Diagnostic Procedure

Component Inspection

EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-II








Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

Without CONSULT-II








Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.