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Canister Closed Valve Vacuum Switching Valve

WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2003 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
  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 and 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 large port. If air flows from small port, go to next step. If air does not flow from small port, replace VSV.
  4. Using jumper wires, apply battery voltage and ground across VSV terminals. Apply compressed air to large port. If air does not flow out of small port, VSV is functioning properly. If air flows from small port, replace VSV.
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