EVAP Vacuum Switching Valve
WARNING: This page is about a different car, the 2002 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
- Remove EVAP Vacuum Switching Valve (VSV). See Figure. Using ohmmeter, measure resistance between EVAP VSV terminals. If resistance is 30-34 ohms at 68°F (20°C), go to next step. If resistance is not 30-34 ohms, replace VSV.
- Using ohmmeter, ensure no continuity exists between each electrical terminal and body of EVAP VSV. Replace EVAP VSV if continuity exists between electrical terminal and body of EVAP VSV.
- To test EVAP VSV operation, apply air pressure to port "E". Ensure no air flows from port "F". Perform STEP 1. See Fig 1.
- Apply battery voltage and ground to electrical terminals on EVAP VSV. Apply air pressure to port "E". Ensure air flows from port "F". Perform STEP 2. See Fig 1. Replace EVAP VSV if defective.