Intake Air Control System: Inspection

INSPECT INTAKE AIR CONTROL VALVE ASSEMBLY NO. 3
1. Apply 26.7 kPa (200 mmHg, 7.9 in.Hg) of vacuum to the actuator. Check if the valve rotates open, as shown in the illustration.
2. Apply the vacuum for 1 minute. The actuator should continue to be keeping the valve open.
  If the result is not as specified, replace the IAC valve assembly No. 3.
  
  Fig 1: Checking If Valve Rotates Open
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT VACUUM SWITCHING VALVE FOR IAC VALVE ASSEMBLY NO. 3

Check the VSV resistance.

Resistance

TESTER CONNECTION AND SPECIFIED CONDITION REFERENCE

Tester Connection	Specified Condition
1 - 2	37 to 44 Ω at 20°C (68°F)
1 - Body ground 2 - Body ground	10 kΩ or higher

If the result is not as specified, replace the VSV assembly No. 3.

Fig 2: Checking VSV Resistance

G04383739

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check VSV operation.
1. Check that air flows from port E to the filter.
  
  Fig 3: Checking Air Flows From Port E To Filter
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply battery voltage across the terminals. Check that air flows from port E to port F.
  If the result is not as specified, replace the VSV assembly No. 3.
  
  Fig 4: Checking Air Flows From Port E To Port F
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT AIR CLEANER CAP SUB-ASSEMBLY
1. Cover port C with your finger, and check that air flows from port B to port A.
2. Cover port C with your finger, and check that air does not flow from port A to port B.
3. Cover ports A and C with your fingers, and apply 60 kPa (450 mmHg, 18 in.Hg) of vacuum to port B for 1 minute. Check that there is no change in the vacuum after 1 minute.
  If the result is not as specified, replace the air cleaner cap.
  
  Fig 5: Inspecting Air Cleaner Cap Sub-Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT VACUUM SWITCHING VALVE FOR IAC VALVE ASSEMBLY NO. 2

Check the VSV resistance.

Resistance

TESTER CONNECTION AND SPECIFIED CONDITION REFERENCE

Tester Connection	Specified Condition
1 - 2	33 to 39 Ω at 20°C (68°F)
1 - Body ground 2 - Body ground	10 kΩ or higher

If the result is not as specified, replace the VSV assembly.

Fig 6: Checking VSV Resistance

G04383743

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check VSV operation.
1. Check that air flows from port E to the filter.
  
  Fig 7: 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 the result is not as specified, replace the VSV assembly.
  
  Fig 8: Checking Air Flows From Port E To Port F
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002