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On-Vehicle Inspection

  1. INSPECT INTAKE SYSTEM 
    1. Check that there are no vacuum leaks at the points shown.
      Fig 1: Inspecting Intake System
      GTY311640Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT INTAKE AIR CONTROL VALVE (for ACIS) 
    1. Connect the Techstream to the DLC3.
    2. Start the engine and turn the Techstream on.
    3. Warm up the engine.
    4. Enter the following menus: Powertrain/Engine and ECT/Active Test/Activate the VSV for Intake Control.
    5. When "ACIS VSV" is turned on, check that the actuator rod operates.

      If the operation is not as specified, inspect the intake air control valve, vacuum tank and check valve. Refer to INSPECTION .

      Fig 2: Inspecting Intake Air Control Valve (For ACIS)
      GTY181033Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. When "ACIS VSV" is turned off, check that the actuator rod returns to its original position.

      If the operation is not as specified, inspect the intake air control valve and vacuum hose. Refer to INSPECTION .

  3. INSPECT INTAKE AIR CONTROL VALVE (for TCV) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON (do not run the engine).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain/Engine and ECT/Active Test/All Data/Intake Air Control Position.
      1. Set the duty ratio to 60% or -60% for 1 to 3 seconds, and then return the duty ratio to 0%. Check the value in the Data List.

        Specified Condition

        Condition (Active Test) Specified Condition (Data List)
        IAC Duty Ratio set to 60% Intake Air Control Position 35° or more
        IAC Duty Ratio set to -60% Intake Air Control Position 17° or less
        NOTE:
        • Supply power to the intake control valve for 1 to 3 seconds.
        • If power is supplied to the intake control valve for less than 1 second, the gear of the tumble control valve does not reach the stopper and the value in the Data List may be incorrect.
        • If power is supplied to the intake control valve for more than 3 seconds, the motor may be damaged.
        • Do not perform this inspection more than 2 times consecutively.

        HINT: 

        • The standard duty ratio for inspections is 60% or -60%. However, if the value in the Data List is not as specified, set the duty ratio to 100% or -100% for 1 to 3 seconds and check the value in the Data List again.
    5. When the result is not as specified during the Active Test, perform the following procedures.
      1. Remove the intake manifold. Refer to REMOVAL .

        HINT: 

        When the ignition switch is off, the tumble control valves are half open.

        2. Fig 3: Inspecting Intake Air Control Valve (For TCV)
        GTY310919Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE:
        • Apply battery voltage for 1 to 3 seconds.
        • If battery voltage is applied for more than 3 seconds, the actuator may be damaged.
        • Do not allow the lead wires to contact the other terminals.
      2. Check that the valves move when connecting the battery to the terminals of the intake air control valve actuator.

        Standard

        Tester Connection Specified Condition
        Positive (+) battery voltage applied to terminal 4 (M-), and negative (-) battery voltage applied to terminal 5 (M+) Open → Closed
        Positive (+) battery voltage applied to terminal 5 (M+), and negative (-) battery voltage applied to terminal 4 (M-) Closed → Open
        TEXT IN ILLUSTRATION

        *a Closed
        *b Open
      3. When the results are not as specified, perform the following inspections.

        HINT: 

        • Check that the valves are not cracked or deformed.
          Fig 4: Identifying Intake Air Control Valves
          GTY195181Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • Remove the intake air control actuator and check that the valves move smoothly.
          Fig 5: Removing Intake Air Control Valve Actuator
          GTY195183Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • If there are no problems with the valves, inspect the intake air control valve actuator. Refer to INSPECTION .
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