Where is the vacuum switching valve?
The Vacuum Switching Valve (VSV) is typically located on the engine (often under the intake manifold) or in the engine compartment, controlling a fixed air bleed into the intake manifold. The valve is a normally closed (N/Q design which is opened when current is passed through the solenoid windings.
How do you test a Toyota vacuum switch valve?
The easiest way to test the proper operation is with the use of a vacuum pump. A hand operated vacuum pump to be exact. With the canister removed from the vehicle you can actually apply vacuum to one side of the switch and then activate it with a 9 V battery as discussed above.
What is a vacuum switching valve?
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.
What does an EGR vacuum switching valve do?
The vacuum switching valve (VSV) is a part of the exhaust gas recirculation (EGR) system of the 1998 Toyota Camry. The function of the EGR system is to recirculate exhaust gases to the intake manifold of the engine and thereby reduce the nitrous oxide emissions of the vehicle (References 1).
How does a switching valve work?
The switching valve is required to direct hot feed to either drum A or drum B. The valve also has the bypass position to divert flow back to the fractionator for or during emergencies. This valve is found in delayed coker units where multi-port valves are required in high-temperature coking applications.
How much does it cost to replace a vacuum switching valve?
The average cost for EGR vacuum control solenoid replacement is between $113 and $123. Labor costs are estimated between $40 and $50 while parts are priced at $73.
How do I know if my VSV is bad?
Check the resistance. Remove the electrical connector from the VSV and check the resistance across the terminals using an ohmmeter. The resistance should be 33 to 39 ohms (at an air temperature of 68 degrees). Resistance outside this range indicates that the VSV is bad (References 1).