Canister Closed Valve Vacuum Switching Valve (Prius)
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Toyota Tacoma, 2002 Toyota RAV4, 2002 Toyota Prius, 2002 Toyota MR2, and 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS .
- Manufacturer states to remove fuel tank for access to Canister Closed Valve Vacuum Switching Valve (CCV VSV) as it is mounted on top of fuel tank. See Figure.
- Remove fuel tank. See FUEL PUMP under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article for removal of fuel tank. Disconnect necessary hoses and electrical connectors for removal of CCV VSV and fresh air valve. Remove bolt and separate fresh air valve from CCV VSV. See Figure. Remove bolts for CCV VSV and remove CCV VSV along with trap filter. Remove bolts and separate trap filter from CCV VSV.
- Using ohmmeter, check that continuity exists between electrical terminals on CCV VSV and that resistance is 25-30 ohms at 68°F (20°C). Replace CCV VSV if no continuity exists or resistance is not within specification.
- Using ohmmeter, ensure no continuity exists between each electrical terminal and body of CCV VSV. Replace CCV VSV if continuity exists between electrical terminal and body of CCV VSV.
- To test CCV VSV operation, apply air pressure to port "A". Ensure air flows from port "B". Perform STEP 1 in illustration. See Fig 1.
- Apply battery voltage and ground to electrical terminals on CCV VSV. Apply air pressure to port "A". Ensure air does not flow from port "B". Perform STEP 2 in illustration. See Fig 1. Replace CCV VSV if defective. Reinstall CCV VSV and fuel tank.