What does a VSV valve do?
The vacuum switching valve (VSV) which controls the vacuum supply to the actuator is normally closed and passes vacuum to the actuator when it is energized by the ECU. By energizing the VSV vacuum is passed to the actuator, closing the air control valve. This effectively lengthens the intake manifold run.
What is a EVAP VSV?
The old EVAP control system is a system which utilizes the intake manifold vacuum to draw the evaporative emissions into the intake manifold and mix then in with the intake air. The ECM controls a duty–cycle type VSV (vacuum switching valve) to purge the evaporative emissions from the charcoal canister.
What is switching valve?
Switching Valves are compact, motorized standalone modules that are ready-to-use alternatives to manual selection valves. Each module has a unique flow switching pattern that is designed for a particular set of laboratory tasks.
Can you drive without a charcoal canister?
Without the charcoal canister, these vapors would either collect in the gas tank or be vented from the car into the atmosphere. These vapors are often toxic and dangerous for the environment.
How do you test a Toyota VSV valve?
From the United States. Before you purchase the VSV, there is a way to test yours if you can get your hands on it. Supply power to the VSV, such as using a 9V battery, + to one of the electrical connector, and – to the other. You should hear a click sound on a working VSV.
What happens if EGR valve is stuck closed?
If the EGR system is clogged up, or the valve is stuck closed, the combustion temperature increases. This may cause pinging (detonation), as well as surging on light acceleration. In a diesel engine, a bad EGR valve is one of the causes of a black smoke.
What is a selector valve?
A selector valve (splitter) is used in hydraulic systems to direct fluid flow. The diverting valve directs the fluid under pressure to the desired operating port of the actuator. At the same time, it directs the return fluid from the opposite port of the actuator to the tank.