INTAKE SYSTEM ON-VEHICLE INSPECTION


  1. INSPECT INTAKE SYSTEM


    1. Check that there are no vacuum leaks at the points shown in the illustration.

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      Tech Tips

      Perform "Inspection After Repair" after repairing air leaks in the intake system Click here.

  2. INSPECT INTAKE AIR CONTROL VALVE (for ACIS)


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine and turn the intelligent tester on.

    3. Warm up the engine.

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      Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Intake Control.

    5. When "Activate the VSV for Intake Control" 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 Click here.

    6. When "Activate the VSV for Intake Control" 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 Click here.

  3. INSPECT INTAKE AIR CONTROL VALVE ACTUATOR (for TCV) (w/ TCV)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / Active Test / All Data / Control the IAC Duty Ratio.


      1. Set the duty ratio to 60% or -60% for 1 to 3 seconds, and then return the duty ratio to 0%. Check Intake Air Control Position in the Data List.

        Specified Condition
        Condition (Active Test) Specified Condition (Data List)
        Control the IAC Duty Ratio set to 60% Intake Air Control Position 35° or more

        Control the 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.

        Tech Tips

        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.

        Specified Condition
        Condition (Active Test) Specified Condition (Data List)
        Control the IAC Duty Ratio set to 100% Intake Air Control Position 70° or more

        Control the IAC Duty Ratio set to

        -100%

        		 Intake Air Control Position 2° or less

    5. When the result is not as specified during the Active Test, perform the following procedure.


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        Text in Illustration
        *a Condition: Closed
        *b Condition: Open

        Remove the intake manifold Click here.

        Tech Tips

        When removing the intake manifold, the tumble control valves are half open.

      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

        Note


        • Apply battery voltage for 1 to 3 seconds.

        • If battery voltage is applied for more than 3 seconds, the actuator may be damaged.

        • If the positive (+) and negative (-) battery leads contact the sensor terminals, the actuator may be damaged.

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        When the results are not as specified, perform the following inspections.

        Check that the valves are not cracked or deformed.

        Remove the intake air control actuator Click here, and check that the valves move smoothly.

        If there are no problems with the valves, inspect the intake air control valve actuator Click here.