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Home >> Toyota >> 1988 >> 4Runner Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Computer Control System >> Component Testing >> Turbocharging Pressure Vacuum Switching Valve (VSV)

Turbocharging Pressure Vacuum Switching Valve (VSV)

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  1. Using an ohmmeter, check continuity between both terminals of turbocharging pressure VSV connector. See Fig 1. Replace VSV if no continuity exists.
  2. Check that no continuity exists between VSV case (body) and each terminal. If continuity exists, replace VSV.
  3. Check that air does not flow from pipe "E" to pipe "F". If air flows through from pipe "E" to pipe "F", replace VSV.
Fig 1: Checking Continuity On VSV
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