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Home >> Lexus >> 2001 >> ES 300 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Emission Systems & Sub-Systems >> Fuel Evaporation System >> Canister Closed Valve Vacuum Switching Valve

Canister Closed Valve Vacuum Switching Valve

  1. Remove canister closed valve Vacuum Switching Valve (VSV). VSV has 2 vacuum ports, a Black 2-pin connector and is located on air filter housing. See Figure-Figure . Measure resistance between canister closed valve VSV terminals. If resistance is 25-30 ohms at 68°F (20°C) or 33-42 ohms at 248°F (120°C), go to next step. If resistance is not as specified, replace VSV.
  2. Check for continuity between canister closed valve VSV case and each terminal of VSV connector (this checks for an internal short). If continuity does not exist, go to next step. If continuity exists, replace canister closed valve VSV.
  3. Apply air pressure to VSV port "A" (large port). If air flows from port "B" (small port), go to next step. If air does not flow from port "B", replace VSV.
  4. Using jumper wires, apply battery voltage and ground across VSV terminals. Apply compressed air to port "A". If air does not flow out of port "B", VSV is functioning properly. If air flows from port "B", replace VSV.
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