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Home >> Toyota >> 1993 >> Celica All-Trac >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Fuel Evaporation >> Check Valve

Check Valve

  1. Remove check valve from lower hose on charcoal canister. Apply air pressure to Yellow side of check valve. Air should pass through check valve.
  2. Apply air pressure to Black side of check valve. Air should not pass through check valve. Replace check valve if defective.