Vacuum Switching Valve For Charcoal Canister
WARNING: This page is about a different car, the 2003 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
- Using an ohmmeter, check that there is continuity between terminals. See Fig 1. Resistance should be 26-30 ohms at 68°F (20°C) and 32-42 ohms at 212°F (100°C). If there is no continuity, replace charcoal canister.
- Check that air flows from port "A" to "B" and "C". See Fig 2.
- Apply battery voltage across terminals. Check that valve is closed. Check that air does not flow from port "A" to "B". Check that air flows from port "A" to "C".
- If operation is not as specified, replace charcoal canister.