On-Vehicle Inspection

INSPECT INTAKE AIR CONTROL VALVE OPERATION
1. Start the engine.
  
  Fig 1: Checking Actuator Rod Movement
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. While the engine is idling, check that the actuator rod moves.
3. Disconnect the VSV connector, and check that the actuator rod returns.
  
  Fig 2: Checking Actuator Rod Return Movement
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If operation is not as specified, inspect the intake air control valve, VSV and ECM.