INTAKE SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT INTAKE SYSTEM

    Tech Tips

    Perform "Inspection After Repair" after repairing vacuum leaks in the intake system.

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

      A018MG1

  2. INSPECT INTAKE AIR CONTROL VALVE (for ACIS)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. A018J9P

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


      Powertrain > Engine > Active Test
      Tester Display
      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 (for ACIS), vacuum tank and check valve.

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    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 (for ACIS) and vacuum hose.

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


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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


      Powertrain > Engine > Active Test
      Active Test Display
      Control the IAC Duty Ratio
      Data List Display
      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 Intake Air Control Position in the Data List.

        Standard
        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 air control valve actuator (for TCV) for 1 to 3 seconds.

        • If power is supplied to the intake air control valve actuator (for TCV) for less than 1 second, the gear of the tumble control valve (TCV) does not reach the stopper and the value in the Data List may be incorrect.

        • If power is supplied to the intake air control valve actuator (for TCV) 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.

        Standard
        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. If the result is not as specified, perform the following inspection.


      1. A018K2CC04
        *a Closed
        *b Open

        Remove the intake manifold.

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        Tech Tips

        When the intake manifold is removed, the 4 tumble control valves (TCV) are half open.

      2. Check that the 4 tumble control valves (TCV) move when the battery is connected to the terminals of the intake air control valve actuator (for TCV).

        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 intake air control valve actuator (for TCV) may be damaged.

        • If the positive (+) and negative (-) battery leads contact the sensor terminals, the intake air control valve actuator (for TCV) may be damaged.

      3. If the result is not as specified, perform the following inspections:


        1. A018LXE

          Check that the 4 tumble control valves (TCV) are not cracked or deformed.

        2. A018HEY

          Remove the intake air control valve actuator (for TCV) and check that the 4 tumble control valves (TCV) move smoothly.

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          If there are no problems with the 4 tumble control valves (TCV), inspect the intake air control valve actuator (for TCV).

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  4. PERFORM INITIALIZATION


    1. Perform "Inspection After Repair" after repairing vacuum leaks in the intake system.

      Click here