toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Vacuum Switching Valve <--> [Air Injection Vacuum Control Solenoid Valve]|Specifications|Page 2339 > < Vacuum Switching Valve <--> [Air Injection Vacuum Control Solenoid Valve]|Specifications|Page 2337
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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

Vacuum Switching Valve <--> [Air Injection Vacuum Control Solenoid Valve]|Specifications|Page 2339 > < Vacuum Switching Valve <--> [Air Injection Vacuum Control Solenoid Valve]|Specifications|Page 2337