On-Vehicle Inspection

WARNING: This page is about a different car, the 2006 Lexus GS 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT INTAKE AIR CONTROL FUNCTION

Fig 1: Inspecting Intake Air Control Function
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Remove the V-bank cover.
2. Connect the intelligent tester to the DLC3.
3. Perform the ACTIVE TEST, and then check that the actuator rod operates.
4. Start the engine.
5. Check that the VSV (for ACIS) is ON (sealed) under either of the following conditions.
  
  Fig 2: Identifying Intelligent Tester To DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  - Depressing the accelerator pedal to a throttle valve opening angle of 60°.
  - Racing the engine above 4,700 RPM.
6. Check that the VSV (for ACIS) is OFF (vented) under either of the following conditions.
  - The engine is idling.
  - Releasing the accelerator pedal while under the VSV (for ACIS) ON condition.
    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.