Inspect VSV

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 No Continuity Between Terminals
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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: Inspecting VSV For Ground
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Inspect the VSV operation.
1. Check that air flows from ports E to G.
  
  Fig 3: Checking Air Flows From Ports E To G
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply battery positive voltage across the terminals.
3. Check that air flows from ports E to F.
Fig 4: Checking Air Flows From Ports E To F
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If operation is not as specified, replace the VSV.