INTAKE SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT INTAKE SYSTEM

    Tech Tips

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



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

      A01QPN2C02
      *A for LHD - -
      A01QRRTC01
      *A for RHD - -

  2. INSPECT INTAKE AIR CONTROL VALVE (for ACIS)


    1. Connect the GTS to the DLC3.

    2. Start the engine and turn the GTS on.

    3. Warm up the engine.

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

      Tech Tips

      Perform this Active Test in less than 10 seconds.


      Powertrain > Engine and ECT > Active Test
      Tester Display
      Activate the VSV for Intake Control
    5. A01QQ99

      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.

      Click here

    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.

      Click here

  3. INSPECT INTAKE AIR CONTROL VALVE (for TCV)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (do not run the engine).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the IAC Duty Ratio / Data List / Intake Air Control Position.

      Tech Tips

      Perform this Active Test in less than 10 seconds.


      Powertrain > Engine and ECT > Active Test
      Tester Display
      Control the IAC Duty Ratio

      Powertrain > Engine and ECT > Data List
      Tester 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 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.

        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.

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


      1. Remove the intake manifold.

        Click here

        Tech Tips

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

      2. A01QP1IC02
        *a Closed
        *b Open

        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.

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

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

        Tech Tips


        • A01QSOT

          Check that the valves are not cracked or deformed.

        • A01QRBP

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

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

          Click here