P0443
P0443 EVAP Canister Purge Volume Control Solenoid ValveDescription
SYSTEM DESCRIPTION
This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor bypass 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 is used 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.
On Board Diagnosis Logic
P0443:
DTC Confirmation Procedure
NOTE: If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
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.
WITH SDT
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 and then turn ON.
5. Select "PURG VOL CN/V P1444" (for DTC P0443) of "EVAPORATIVE SYSTEM" in "DTC work support" mode with SDT.
6. Touch "START".
7. Start engine and let it idle until "TESTING" on SDT changes to "COMPLETED". (It will take approximately 10 seconds.)
If "TESTING" is not displayed after 5 minutes, retry from step 2.
8. Check that "OK" is displayed after touching "DTC check". If "NG" is displayed, refer to [P0443 EVAP Canister Purge Volume Control Solenoid Valve].
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. 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 20 seconds.
6. Select Service $07 with GST.
7. If 1st trip DTC is detected, go to [P0443 EVAP Canister Purge Volume Control Solenoid Valve].
Diagnosis Procedure
Step 1-3:
Step 4-10:
Step 11-14:
Component Inspection
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With SDT
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
Without SDT
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
DRAIN FILTER
1. Check visually for insect nests in the drain filter air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
4. Blow air into port A and check that it flows freely out of port B.
5. Block port B.
6. Blow air into port A and check that there is no leakage.
7. If NG, replace drain filter.