T100 Pickup 4WD V6-180.5 2959cc 3.0L SOHC (3VZ-E) (1993)
Vacuum Switching Valve: Testing and Inspection
INSPECTION
1. Check Vacuum Circuit Continuity In Vacuum Switching Valve (VSV) By Blowing Air Into Pipe
Testing Pulsed Secondary Air Injection Vacuum Switching Valve
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Connect the VSV terminals to the battery terminals as illustrated.
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Blow air into pipe E and check that air comes out of pipe F.
Testing Pulsed Secondary Air Injection Vacuum Switching Valve
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Disconnect the battery from the VSV.
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Blow air into pipe E and check that air comes out of air filter. If a problem is found, replace the VSV.
2. Check For Short Circuit
Testing Pulsed Secondary Air Injection Vacuum Switching Valve
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Using an ohmmeter, check that there is no continuity between the terminal and the VSV body. If there is continuity, replace the VSV.
3. Check For Open Circuit