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Celica, Corona, Pickup

  1. Disconnect and plug vacuum hose from port X. Using a jumper hose, connect port X to intake manifold. Disconnect vacuum hose from port S and Z. See Fig 2.
  2. Run engine at idle. Plug port Z with finger and check that no vacuum is felt. Reconnect hose to port S. Vacuum should be felt momentarily.
Fig 1: Vacuum Switching Valve Test Connections
G09323336Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Vacuum Control Valve Test (Celica, Corona & Pickup)
G09323337Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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