VSV For Pressure Switching Valve: Inspection

Using an ohm meter, check that there is continuity between the terminals.

Resistance: 

If there is no continuity, replace the VSV.

Fig 1: Inspecting VSV For Open Circuit

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Using an ohmmeter, check that there is no continuity between each terminal and the body.

If there is continuity, replace the VSV.

Fig 2: Inspecting VSV For Ground

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1. Check that air does not flow from ports E to F.
   Fig 3: Inspecting VSV Operation

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2. Apply battery positive voltage across the terminals.
3. Check that air flows from ports E to F.

If operation is not as specified, replace the VSV.