Air Cleaner Cap Sub-Assembly (ES300)

WARNING: This page is about a different car, the 2002 Lexus RX 300 and 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.

Check VSV for Canister Closed Valve (CCV) with an ohmmeter connected between VSV terminals. See Fig 1. Resistance should be 25-30 ohms at 68°F (20°C). If resistance is to specification, go to next step. If resistance is not to specification, replace VSV.
Using ohmmeter, ensure there is no continuity between each terminal and VSV body. See Fig 2. If continuity is present, replace VSV. If continuity is not present, check that air flows between ports "A" to "B". See Fig 3. Apply battery voltage between VSV terminals. Air should not flow between ports "A" to "B". See Fig 4. If operation is not as specified, replace VSV.

Fig 1: Checking Resistance Between VSV For CCV Terminals
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Fig 2: Checking Continuity Between VSV For CCV Body & Terminals
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Fig 3: Checking For Airflow Between Ports "A" & "B"
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Fig 4: Checking For No Airflow Between Ports "A" & "B"
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