INTAKE SYSTEM ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed, installed, or replaced when repairing air leaks in the intake system are shown below.

Replacement Part or Procedure Necessary Procedures Effects/Inoperative when not Performed Link
Air leak from intake system is repaired Inspection After Repair

  • Poor idle, etc.

  • Engine start function, etc.

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CAUTION:

To prevent injury due to contact with an operating V-ribbed belt or cooling fan, keep your hands and clothing away from the V-ribbed belt and cooling fans when working in the engine compartment with the engine running or the engine switch on (IG).

B006PUQ

PROCEDURE


  1. INSPECT INTAKE SYSTEM

    CAUTION:

    To prevent injury due to contact with an operating V-ribbed belt or cooling fan, keep your hands and clothing away from the V-ribbed belt and cooling fans when working in the engine compartment with the engine running or the engine switch on (IG).

    Tech Tips

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

    Click here


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

      B006P60

  2. INSPECT INTAKE AIR CONTROL VALVE (for ACIS)

    CAUTION:

    To prevent injury due to contact with an operating V-ribbed belt or cooling fan, keep your hands and clothing away from the V-ribbed belt and cooling fans when working in the engine compartment with the engine running or the engine switch on (IG).


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. B006OGL

      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 set to on, check that the actuator rod operates.

      If the actuator rod does not operate, inspect the intake air control valve (for ACIS), vacuum tank and check valve.

      Click here

    6. When Activate the VSV for Intake Control is set to off, check that the actuator rod returns to its original position.

      If the actuator rod does not return to its original position, inspect the intake air control valve (for ACIS) and vacuum hose.

      Click here

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

    CAUTION:

    To prevent injury due to contact with an operating V-ribbed belt or cooling fan, keep your hands and clothing away from the V-ribbed belt and cooling fans when working in the engine compartment with the engine running or the engine switch on (IG).


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    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 the Data List item Intake Air Control Position.

        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. B006NK4C04
        *a Closed
        *b Open

        Remove the intake manifold.

        Click here

        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.

        • Do not allow the lead wires to contact the other terminals.

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


        1. B006OAA

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

        2. B006RDX

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

          Click here

          If the 4 tumble control valves (TCV) move smoothly, inspect the intake air control valve actuator (for TCV).

          Click here

  4. PERFORM INITIALIZATION


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

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