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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 28 (Engine Controls - System & Component Testing - V6 & V8) >> Emission Systems & Sub-Systems >> Fuel Evaporative System >> Pressure Switching Valve Vacuum Switching Valve (Avalon, Camry, Camry Solara, Highlander, Sequoia, Sienna, Tacoma & 4Runner)

Pressure Switching Valve Vacuum Switching Valve (Avalon, Camry, Camry Solara, Highlander, Sequoia, Sienna, Tacoma & 4Runner)

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  1. Remove pressure switching valve Vacuum Switching Valve (VSV). See PRESSURE SWITCHING VALVE VSV LOCATION  table. See Figure-Figure .
    PRESSURE SWITCHING VALVE VSV LOCATION

    Application Location
    Avalon On Bracket At Charcoal Canister Near Fuel Tank & Contains Blue 2-Pin Electrical Connector With Pink/Black & Black/White Wires
    Camry On Bracket At Charcoal Canister Near Fuel Tank & Contains Blue 2-Pin Electrical Connector With Violet & Black/Red Wires
    Camry Solara On Bracket At Charcoal Canister Near Fuel Tank & Contains Blue 2-Pin Electrical Connector With White/Red & Red Wires
    Highlander On Bracket At Charcoal Canister Behind Fuel Tank & Contains Blue 2-Pin Electrical Connector With Green/Yellow & White Wires
    Sequoia On Bracket At Charcoal Canister Near Fuel Tank & Contains Blue 2-Pin Electrical Connector With Pink/Blue & Green/Red Wires
    Sienna On Bracket At Charcoal Canister Near Fuel Tank & Contains Dark Gray 2-Pin Electrical Connector With Black/Red & White/Red Wires
    Tacoma On Bracket At Charcoal Canister Near Fuel Tank & Contains Blue 2-Pin Electrical Connector With Green/Black & White/Red Wires
    4Runner On Bracket At Charcoal Canister Near Fuel Tank & Contains Blue 2-Pin Electrical Connector With Red/Yellow & White/Blue Wires
  2. Using ohmmeter, ensure continuity exists between electrical terminals on pressure switching valve VSV and that resistance is within specification. See PRESSURE SWITCHING VALVE VSV RESISTANCE  table. Replace pressure switching valve VSV if no continuity exists or resistance is not within specification.
    PRESSURE SWITCHING VALVE VSV RESISTANCE

    Application Ohms @ 68°F (20°C)
    Avalon, Camry & Camry Solara (1)
    Highlander 30-36
    Sequoia 37-44
    Sienna (1)
    Tacoma 30-36
    4Runner (1)
    (1) Resistance should be 37-44 ohms at 68°F (20°C) and 51-62 ohms at 248 °F (120°C).
  3. Ensure no continuity exists between each electrical terminal and body of pressure switching valve VSV. Replace pressure switching valve VSV if continuity exists between electrical terminal and body of pressure switching valve VSV.
  4. To test pressure switching valve VSV operation, apply air pressure to port "E". Ensure air does not flow from port "F". Perform STEP 1 in illustration. See Fig 1 and Fig 2 .
  5. Apply battery voltage and ground to electrical terminals on pressure switching valve VSV. Apply air pressure to port "E". Ensure air flows from port "F". Perform STEP 2 in illustration. See Fig 1 and Fig 2 . Replace pressure switching valve VSV if defective.
    Fig 1: Testing Pressure Switching Valve Vacuum Switching Valve (Avalon, Camry, Camry Solara, Highlander, Sequoia, Sienna & 4Runner)
    G00009732Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Testing Pressure Switching Valve Vacuum Switching Valve (Tacoma)
    G00035256Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002