EVAP 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.
- Remove engine cover. Remove control valve set and wire harness cover. See Figure. Disconnect electrical connector and vacuum hoses from EVAP Vacuum Switching Valve (VSV). Measure resistance between VSV terminals. If resistance is 27-33 ohms at 68°F (20°C), go to next step. If resistance is not as specified, replace VSV.
- Check for continuity between 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 VSV.
- Apply compressed air to port "E". See Fig 1. Air should not flow from port "F". If VSV functions as specified, go to next step. If VSV does not function as specified, replace VSV.
- Apply battery voltage across VSV terminals. Apply compressed air to port "E". If air flows out of port "F", VSV is functioning properly. If air does not flow out of port "F", replace VSV.