Intake Air Control System: Inspection

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT INTAKE AIR CONTROL VALVE ASSY NO.2
1. With 26.7 kPa (200 mm Hg, 7.9 in.Hg) of vacuum applied to the actuator, check that the actuator rod moves.
2. One minute after applying the vacuum, check that the actuator rod does not return.
3. If the operation is not as specified, replace the intake air control valve assembly No.2.
Fig 1: Checking Actuator Rod Moves (1 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT INTAKE AIR CONTROL VALVE ASSY NO.3
1. Inspect actuator operation
  1. With 26.7 kPa (200 mm Hg, 7.9 in.Hg) of vacuum applied to the actuator, check that the actuator rod moves.
  2. One minute after applying the vacuum, check that the actuator rod does not return.
  3. If the operation is not as specified, replace the intake air control valve No.3.
  Fig 2: Checking Actuator Rod Moves (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect VSV operation
  1. Using an ohmmeter, check the resistance between the terminals.
    Resistance: 37 to 44 Ω at 20°C (68°F)
    
    If the resistance is not as specified, replace the VSV.
    
    Fig 3: Checking Resistance Between Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Inspect the VSV for ground.
    - Using an ohmmeter, check that there is no continuity between each terminal and the body.
    If there is continuity, replace the VSV.
    
    Fig 4: Checking Continuity Between Terminal & Body
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Inspect the VSV operation.
    - Check that air flows from port E to the filter.
      
      Fig 5: Checking Air Flows From Port E To Filter
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    - Apply battery voltage across the terminals.
    - Check that air flows from port E to port F.
  If operation is not as specified, replace the VSV.
Fig 6: Applying Battery Voltage Across Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT AIR CLEANER CAP SUB-ASSY
1. Cover port C with finger, and check that air flows from port B to port A.
2. Cover port C with finger, and check that air does not flow from port A to port B.
3. Cover port A and C with fingers, and apply 60 kPa (450 mm Hg, 18 in.Hg) of vacuum to port B, and check that there is no change of vacuum after one minute.
Fig 7: Identifying Cover Port C With Finger & B To Port A
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT VACUUM SWITCHING VALVE ASSY NO.1
1. Inspect the VSV for open circuit.
  1. Using an ohmmeter, check the resistance between the terminals.
  Resistance: 33 to 39 Ω at 20°C (68°F)
  
  If the resistance is not as specified, replace the VSV.
  
  Fig 8: Checking Resistance Between Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the VSV for ground.
  1. Using an ohmmeter, check that there is no continuity between each terminal and the body.
  If there is continuity, replace the VSV.
  
  Fig 9: Checking Continuity Between Terminal & Body
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Inspect the VSV operation.
  1. Check that air flows from port E to the filter.
    
    Fig 10: Checking Air Flows From Port E To Filter
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Apply battery voltage across the terminals.
  3. Check that air flows from port E to port F.
  If operation is not as specified, replace the VSV.
Fig 11: Applying Battery Voltage Across Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002