1. REMOVE VSV
2. INSPECT VSV FOR OPEN CIRCUIT
Using an ohmmeter, check that there is a continuity between the terminals.
Resistance: 24 - 30 W at 20C (68F)
If there is no continuity, replace VSV.
3. INSPECT VSV FOR GROUND
Using an ohmmeter, check that there is no continuity between each terminal and the body.
If there is a continuity, replace VSV.
4. INSPECT VSV OPERATION
(a) Check that air flows from the ports A to B.
(b) Apply the battery positive voltage across the terminals.
(c) Check that air does not flow from the ports A to B.
If operation is not as specified, replace VSV.
5. REINSTALL VSV