VSV For Pressure Switching Valve: Inspection

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

Fig 1: Checking There Is Continuity Between Terminals Using An Ohmmeter

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Resistance: 

Fig 2: VSV Resistance Table

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If there is no continuity, replace the VSV.

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

If there is no continuity, replace the VSV.

Fig 3: Checking There Is No Continuity Between Each Terminal & Body Using An Ohmmeter

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1. Check that air flows from ports E to F.
   Fig 4: Checking Air Flows From Ports E To F

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2. Apply battery positive voltage across the terminals.
Fig 5: Applying Battery Positive Voltage Across Terminals
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3. Check that air does not flow from ports E to F.

If operation is not as specified, replace the VSV.