On-Vehicle Inspection

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

CHECK INTAKE AIR CONTROL VALVE OPERATION
1. Start the engine.
2. While the engine is idling, check that the actuator rod moves.
  
  Fig 1: Checking Actuator Rod Moves
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the VSV connector (for ACIS), and check that the actuator rod is returned.
  If the operation is not as specified, inspect the intake air control valve, VSV (for ACIS) and ECM.
  
  Fig 2: Checking Actuator Rod Is Returned
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002