VSV For Pressure Switching Valve: Inspection

1. Inspect the VSV for open circuit.

   Using an ohmmeter, check that there is no continuity between the terminals.

   Resistance: 37 - 44 Ω at 20°C (68°F) 

   If there is no continuity, replace the VSV.

   Fig 1: Checking Continuity Between Terminals

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2. Inspect the VSV for ground.

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

   If there is continuity, replace the VSV.

   Fig 2: Checking For NO Continuity Between Terminals

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3. Inspect the VSV operation.
   1. Check that air flows from ports E to F.
      Fig 3: Checking Air Flows From Ports

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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.