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# VACUUM SWITCHING VALVE (for ACIS) > ON-VEHICLE INSPECTION

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1. INSPECT VACUUM SWITCHING VALVE ASSEMBLY (for ACIS)

1. Measure the VSV resistance.

   Standard resistance:

     Tester Connection | Specified Condition
     1 - 2 | 33 to 39 Ω at 20°C (68°F)
     1 - Body ground 2 - Body ground | 1 MΩ or higher

   If the result is not as specified, replace the VSV assembly.

1. Check the VSV operation.

   1. Check that air flows from port E to the filter.
      If the result is not as specified, replace the VSV assembly.

   2. Apply battery voltage across the terminals.

   3. Check that air flows from port E to F.
      If the result is not as specified, replace the VSV assembly.