Acoustic Control Induction System (ACIS): Inspection

INSPECT INTAKE AIR CONTROL VALVE
1. With 53.3 kPa (400 mmHg, 15.75 in.Hg) of vacuum applied to the actuator, check that the actuator rod moves.
  If operation is not as specified, turn the adjusting screw.
  
  Fig 1: Checking Actuator Rod Moves
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. 1 minute after applying the vacuum in (a), check that the actuator rod does not return.
  
  Fig 2: Checking Actuator Rod Does Not Return
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT VACUUM TANK
1. Check that air flows from ports A to B.
2. Check that air does not flow ports B to A.
3. Plug port B with your finger, and apply 53.3 kPa (400 mmHg, 15.75 in.Hg) of vacuum to port A, and check that there is no change in vacuum after 1 minute.
  If operation is not as specified, replace the vacuum tank.
  
  Fig 4: Checking There Is No Change In Vacuum After 1 Minute
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT VSV (See INSPECTION )