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On-Vehicle Inspection

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR LEAK 
    1. Visually check that the hoses, connections and gaskets have no cracks, leaks or damage.
      NOTE:
      • Detachment or other problems with the engine oil dipstick, filler cap, PCV hose and other components may cause the engine to run improperly.
      • Disconnection, looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will allow air suction and cause an engine failure or engine malfunctions.

      If the result is not as specified, replace parts as necessary.

      Fig 1: Locating Leakage Points
      G05773095Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK FUEL CUT-OFF RPM 
    1. Start and warm up the engine.
    2. Open the throttle valve and keep the engine speed at 2500 rpm
    3. Use a sound scope to check for injector operating noise.
    4. Check that when the accelerator pedal is released, injector operation noise stops momentarily and then resumes.

      If the result is not as specified, check the injector, wiring and ECM.

  3. CHECK LINE AND CONNECTORS 
    1. Visually check for loose connections, sharp bends or damage.
  4. CHECK FUEL TANK ASSEMBLY 
    1. Visually check for deformation, cracks or fuel leakage
  5. CHECK PURGE VSV 
    1. Connect the intelligent tester or Techstream to the DLC3.
    2. Turn the power switch ON (IG).
    3. Push the tester main switch ON.
    4. Enter the following menus
      1. Intelligent tester - Select- DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / EVAP VSV.
      2. Techstream - Select: Powertrain / Engine and ECT / Active Test / Activate the VSV for EVAP Control
    5. Disconnect the hose (connected to the canister) from the purge VSV.
    6. Start the engine
    7. Using the tester, turn off the purge VSV (EVAP VSV: OFF).
    8. Use your finger to confirm that the purge VSV has no suction.
    9. Using the tester, turn on the purge VSV (EVAP VSV: ON).
    10. Use your finger to confirm that the purge VSV has suction.
      Fig 2: Locating Purge VSV Hose
      G05773096Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT AIRTIGHTNESS IN FUEL TANK AND FILLER PIPE 

    HINT:

    Perform the following inspection within 30 minutes. Complete the operation before the "Fuel Vapor Containment System" operates.

    1. Remove the floor No. 1 under cover (see REMOVAL  ).
    2. Push the lid opener switch to release the pressure in the fuel tank.
    3. Check that the lid is opened.
      Fig 3: Identifying Lid Opener Switch
      G05773097Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the fuel tank vent hose from the canister.
      1. Pinch the retainer and then raise it.

        HINT.

        Do not remove the retainer.

        NOTE:
        • Do not use any tools in this procedure.
        • Check for any dirt and foreign matter contamination in the valve and around the connector. Clean if necessary. Foreign matter may damage the O-rings or cause leaks in the seal between the valve and connector.
          Fig 4: Disconnecting Fuel Tank Vent Hose From Canister
          G05773098Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Connect a pressure gauge to the fuel tank vent hose.
      Fig 5: Connecting Pressure Gauge To Fuel Tank Vent Hose
      G05773099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Apply 4 kPa (40.7 gf/cm2 , 0.6 psi) of pressure to the vent line of the fuel tank
    7. Check that the internal pressure of the fuel tank is maintained for 1 minute.
    8. Check the connected portions of each hose and pipe.
    9. Check the installed parts on the fuel tank.

      If any malfunctions, damage or other problems are found, replace the fuel tank and filler pipe.

    10. Connect the fuel tank vent hose to the canister.
      1. Connect the fuel tank vent hose into the canister and push the retainer to lock it
        NOTE:
        • Check for damage or foreign objects on the connected part.
        • After connecting, check that the fuel tank vent hose and the valve are securely connected by pulling on them.
          • Fig 6: Connecting Fuel Tank Vent Hose To Canister
          G05773100Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. Install the floor No. 1 under cover (see INSTALLATION  ).
  7. CHECK FUEL CUTOFF VALVE AND FILL CHECK VALVE 

    HINT:

    Perform the following inspection within 30 minutes. Complete the operation before the "Fuel Vapor Containment System" operates.

    1. Remove the floor No. 1 under cover (see REMOVAL  ).
    2. Push the lid opener switch to release the pressure in the fuel tank
    3. Check that the lid is opened.
      4. Fig 7: Identifying Lid Opener Switch
      G05773097Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the fuel tank vent hose from the canister.
      1. Pinch the retainer and then raise it

        HINT:

        Do not remove the retainer.

        NOTE:
        • Do not use any tools in this procedure.
        • Check for any dirt and foreign matter contamination in the valve and around the connector. Clean if necessary. Foreign matter may damage the O-rings or cause leaks in the seal between the valve and connector.
          Fig 8: Disconnecting Fuel Tank Vent Hose From Canister
          G05773098Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Connect a pressure gauge to the fuel tank vent hose.
    6. Fill the fuel tank with fuel.
    7. Apply 4 kPa (40.7 gf/cm2 , 0 6 psi) of pressure to the vent line of the fuel tank.

      HINT:

      Check the amount of fuel in the fuel tank. When the fuel tank is full, the float valve of the fill check valve is closed and no air can pass through.

    8. Remove the fuel tank cap, and check that the pressure drops.

      If the pressure does not drop, replace the fuel tank assembly.

      Fig 9: Identifying Fuel Tank Cap
      G05773103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Connect the fuel tank vent hose to the canister.
      1. Connect the fuel tank vent hose into the canister and push the retainer to lock it.
        NOTE:
        • Check for damage or foreign objects on the connected part.
        • After connecting, check that the fuel tank vent hose and the valve are securely connected by pulling on them.
    10. Install the floor No. 1 under cover (see INSTALLATION  ).
  8. CHECK AIR INLET LINE 
    1. Remove the floor No. 1 under cover (see REMOVAL  ).
      Fig 10: Connecting Fuel Tank Vent Hose To Canister
      G05773100Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the air inlet line hose from the canister.
    3. Check that air flows freely into the air inlet line.

      HINT:

      If air does not flow freely into the air inlet line, repair or replace it

    4. Connect the air inlet line hose to the canister.
    5. Install the floor No. 1 under cover (see INSTALLATION  ).
      Fig 11: Checking Air Flows
      G05773105Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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