The EVAP canister vent control valve is located on the EVAP canister and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components.
This solenoid valve is used only for diagnosis, and usually remains opened.
When the vent is closed, under normal purge conditions, the evaporative emission control system is depressurized and allows "EVAP Control System" diagnosis.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE 1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON.
Turn ignition switch OFF and wait at least 10 seconds. >> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE With CONSULT-III
Turn ignition switch ON and wait at least 5 seconds.
Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-III.
Start engine and let it idle for at least 1 minute.
Repeat next procedures 3 times.
Increase the engine speed up to between 3,000 and 3,500 rpm and maintain that speed it for 2 minutes and 50 seconds to 3 minutes. Never exceed 3 minutes.
Fully released accelerator pedal and keep engine idle for approximately 5 seconds.
Repeat next procedure 20 times.
Quickly increase the engine speed up to between 4,000 and 4,500 rpm and maintain that speed it for 25 to 30 seconds.
Fully released accelerator pedal and keep engine idle for at least 35 seconds.
Check 1st trip DTC. Is 1st trip DTC detected?
YES >> Go to Diagnosis Procedure.
NO >> Inspection END
Diagnosis Procedure 1.CHECK RUBBER TUBE
Turn ignition switch OFF.
Disconnect rubber tube connected to EVAP canister vent control valve.
Check the rubber tube for clogging. Is the Inspection result normal?
YES >> GO TO 2.
NO >> Clean rubber tube using an air blower. 2.CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to Component Inspection.
Is the Inspection result normal?
YES >> GO TO 3.
NO >> Replace EVAP canister vent control valve. 3.CHECK IF EVAP CANISTER IS SATURATED WITH WATER
Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
Check if water will drain from the EVAP canister. Does water drain from the EVAP canister?
YES >> GO TO 4.
NO >> GO TO 6. 4.CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached. The weight should be less than 2.1 kg (4.6 lb).
Is the Inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5. 5.DETECT MALFUNCTIONING PART
Check the following.
EVAP canister for damage
EVAP hose between EVAP canister and vehicle frame for clogging or poor connection >> Repair hose or replace EVAP canister.
6.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
Disconnect EVAP control system pressure sensor harness connector.
Check that water is not inside connectors. Is the Inspection result normal?