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Vacuum Control Valve (Cressida & Supra)

  1. Remove VCV. Blow air into port S checking that air flows to port Z. Blow air into port Y checking that air does not flow to any other port.
  2. Connect a vacuum gauge to hose leading to port S and apply more than 16.2 in. Hg. Connect another vacuum gauge to hose leading to port Z. Check that port Z vacuum gauge indicates 9.7-12.6 in. Hg.
  3. Increase vacuum to port S to more than 18.1 in. Hg. Check that port Z vacuum gauge indicates 2.1-4.5 in. Hg.
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