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On-Vehicle Inspection

  1. INSPECT INTAKE SYSTEM 
    1. Check that there are no vacuum leaks at the points shown in the illustration.
    Fig 1: Locating Inspect Intake System Vacuum Leaks Points
    G05750208Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT INTAKE AIR CONTROL VALVE ACTUATOR 
    1. Disconnect the vacuum hose.
      Fig 2: Locating Vacuum Hose
      G05750209Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Confirm that the intake air control valve closes under vacuum and opens smoothly when the vacuum is released.

      If the result is not as specified, replace the air cleaner assembly.

      Fig 3: Checking Intake Air Control Valve Actuator Operation
      G05750210Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect the vacuum hose.
    Fig 4: Locating Vacuum Hose
    G05750209Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT VACUUM SWITCHING VALVE 
    1. Disconnect the connector and 2 vacuum hoses
      Fig 5: Locating Vacuum Switching Valve Connector And Vacuum Hoses
      G05750212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      1-2 20°C (68°F) 37 to 44 Ω
      1 - Body ground Always 10 kΩ or higher
      2 - Body ground Always 10 kΩ or higher

      If the result is not as specified, replace the air cleaner assembly.

      Fig 6: Checking Resistance Between Vacuum Switching Valve Connector Terminals
      G05750213Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check the operation of the vacuum switching valve.
      1. When vacuum is applied to the port E, check that air is sucked into the filter.

        If the result is not as specified, replace the air cleaner assembly.

        Fig 7: Checking Air Is Sucked Into Filter
        G05750214Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Apply battery voltage across the terminals. When vacuum is applied to the port F, check that air is sucked into the port E.

        If the result is not as specified, replace the air cleaner assembly

      Fig 8: Checking Air Is Sucked Into Port E
      G05750215Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Connect the connector and 2 vacuum hose.
    Fig 9: Locating Vacuum Switching Valve Connector And Vacuum Hoses
    G05750212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT AIR CLEANER FILTER ELEMENT 
    1. Check that the air cleaner is not excessively dirty.

      If the air cleaner is excessively dirty, replace the air cleaner filter element.

    2. If cleaning the air cleaner filter element, blow compressed air as shown in the illustration to clean it
    Fig 10: Cleaning Air Cleaner Filter Element With Compressed Air
    G04948129Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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