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Home › Infiniti › 2008 › M45 Base › Repair and Diagnosis › External Pages › Different car › Section 26 (Intake (1GR-FE)) › Intake System › On-Vehicle Inspection

On-Vehicle Inspection

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK INTAKE AIR CONTROL FUNCTION 
    Fig 1: Identifying Intake Air Control Valve Actuator
    G05152558Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the V-bank cover.
    2. Start the engine.
    3. Check that the VSV (for ACIS) is ON (seal) under either of the following conditions below.
      • Depressing the accelerator pedal to a throttle valve opening angle of 60°.
        • Fig 2: Depressing Accelerator Pedal
        G05152559Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Racing the engine above 4700 rpm.
    4. Check that the VSV (for ACIS) is OFF (vent) under either of the following conditions below.
      • The engine is idling.
      • Releasing the accelerator pedal while under the VSV (for ACIS) ON condition.
    5. Connect the intelligent tester or Techstream to the DLC3.
    6. Perform the Active Test, and then check that the actuator rod operates.

      If the result is not as specified, inspect the intake air control valve, vacuum tank and VSV (for ACIS) for normal operation. Replace malfunctioning parts as necessary.

    7. Install the V-bank cover.
  2. CHECK INTAKE AIR CONTROL VALVE OPERATION 
    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
      G05152560Courtesy 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 40 kPa (299 mmHg, 11.8 in.Hg). (The actuator rod is pulled out.)
    5. Fully depress the accelerator pedal, and check that the vacuum gauge needle points to 0 kPa (0 mmHg, 0 in.Hg). (The actuator rod is returned.)
    6. Remove the vacuum gauge, and connect the vacuum hose to the actuator.
    7. Install the V-bank cover.
  3. INSPECT INTAKE AIR CONTROL VALVE 
    1. Inspect the diaphragm.
      1. Using a vacuum pump, apply a vacuum of 27 kPa (200 mmHg, 7.85 in.Hg). Check that the lever moves.

        If the result is not as specified, replace the intake air surge tank.

        Fig 4: Inspecting Diaphragm
        G05152561Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK AIR INDUCTION SYSTEM 

    HINT:

    The illustration shows the areas that may draw in secondary air, which could lead to idling problems.

    Fig 5: Identifying Air Induction System
    G05152562Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check that the hoses are installed correctly.
    2. Check for cracks, etc. in the hoses.
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