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Home >> Toyota >> 1999 >> RAV4 Base, 2D Utility, AWD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing - 4-Cylinder >> Emission Systems & Sub-Systems >> EGR Check Valve >> Tacoma With A/T & 4Runner With A/T
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Tacoma With A/T & 4Runner With A/T

  1. Remove EGR check valve. See Figure. Apply air pressure on Orange-colored side of EGR check valve. Air should flow through EGR check valve.
  2. Apply air pressure on Black-colored side of EGR check valve. Air should not flow through EGR check valve. Replace EGR check valve if defective. Reinstall EGR check valve with Orange-colored side of EGR check valve toward EGR vacuum modulator.
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