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Home >> Toyota >> 1992 >> 4Runner 2D Utility, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Air Suction (As) System >> Vacuum Check Valve
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Vacuum Check Valve

Ensure air flows from Orange port to Black port. Air should not flow from Black port to Orange port.

Fig 1: Testing Air Suction (AS) System (3.0L)
G118988Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Checking Vacuum Switching Valve
G118989Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: Air Suction Sys Components & Operating Parameters (2.4L) Id
G93C00002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 4: Air Suction (AS) System Components & Operating Parameters (2.4L) ID
GB0049084Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 5: Air Suction System Components & Operating Parameters (3.0L) ID
G93D00003Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 6: Air Suction (AS) System Components & Operating Parameters (3.0L) ID
GB0049085Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002