4 Runner 2WD L4-144.4 2366cc 2.4L SOHC (22R-E) (1990)
Air Injection Vacuum Control Solenoid Valve: Testing and Inspection
Vacuum Switching Valve
Fig. 23 Testing VSV Operation - Current Applied
Fig. 24 Testing VSV Operation - Current Removed
1.
Disconnect the vacuum switching valve and remove it from the vehicle.
2.
Connect the VSV terminals to battery current. Fig. 23
3.
Blow into pipe E and check that air flows out of pipe G.
4.
Disconnect the battery.
5.
Blow into pipe E and check that the air comes out of the air filter. Fig. 24
Fig. 25 Testing VSV For Short Circuit