On-Vehicle Inspection

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.
Fig 2: Identifying VSV Connector (For ACIS)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the operation is not as specified, inspect the intake air control valve, VSV (for ACIS) and ECM.