Previa Van LE 4WD L4-2438cc 2.4L DOHC SC MFI (1997)
Vacuum Solenoid Valve HVAC: Testing and Inspection
VSV INSPECTION
1. REMOVE VSV
a. Disconnect the connector and hoses.
b. Remove the bolt and the VSV.
2. CHECK VACUUM CIRCUIT CONTINUITY IN VSV BY BLOWING AIR INTO PIPES
a. Connect the VSV terminals to the battery terminals, as shown in the illustration.
b. Blow into pipe "A" and check that air comes out of pipe "B" but does not come out of filter "C".
c. Disconnect the battery.
d. Blow into pipe "B" and check that air comes out of filter "C" but does not come out of pipe "B".
If a problem is found, replace the VSV.
3. CHECK FOR SHORT CIRCUIT
Using an ohmmeter, check that there is no continuity between each terminals and the VSV body.
If continuity is as specified. replace the VSV.
