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Home >> Toyota >> 2005 >> Tacoma Base, 2D Pickup, 4WD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Intake Air Control System >> Intake Air Control System >> On-Vehicle Inspection

On-Vehicle Inspection

  1. INSPECT INTAKE AIR CONTROL FUNCTION 
    1. Remove the V-bank cover.
    2. Warm up the engine.
    3. Turn the ignition switch to OFF.
    4. Connect the hand-held tester to the DLC3.
    5. Start the engine and allow it to idle.
    6. Turn the hand-held tester ON.
    7. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1 / ON.
      1. Check that the intake air control valve is pulled out.

      If the intake air control valve does not operate, replace the VSV for ACIS or intake air surge tank.

      Fig 1: Identifying Vacuum Switching Valve
      G03084048Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1 / OFF.
      Fig 2: Connecting Hand-Held Tester To DLC3
      G03084049Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Check that the intake air control valve is returned to its original position.

      If the intake air control valve does not operate, replace the VSV for ACIS or intake air surge tank.

    9. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ENGINE SPD, THROTTLE POS, INTAKE CTL VSV1, and INTAKE CTL VSV2.
      1. When depressing the accelerator pedal to the 60 % accelerator opening angle and running the engine at a speed of 2,200 to 4,100 rpm, check that the VSV is ON.

      If the intake air control valve does not operate, replace the Vacuum Switching Valve No. 1.

    10. Release the accelerator pedal when in the condition in step (1) or when the engine is idling, and check that the VSV is OFF.

    If the intake air control valve does not operate, replace the Vacuum Switching Valve No. 1.

  2. INSPECT INTAKE AIR CONTROL VALVE 
    1. Remove the V-bank cover.
    2. Using a 3-way connector, connect a vacuum gauge to the actuator hose.
      3. Fig 3: Connecting Vacuum Gauge To Actuator Hose
      G03084050Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Start the engine.
    4. While the engine is idling, check that the vacuum gauge needle momentarily fluctuates up to approximately. 39.9 kPa (300 mmHg, 11.8 in.Hg). (The actuator rod is pulled out.)

      If the intake air control valve does not operate, replace the intake air surge tank.

    5. Rapidly depress the accelerator pedal to the fully open position and check that the vacuum gauge needle points to 0 kPa (0 mmHg, 0 in.Hg). (The actuator rod is returned to its original position.)

    If the intake air control valve does not operate, replace the intake air surge tank.

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