Intake Air Control System: Inspection

1. Connect the MITYVAC (hand-held vacuum pump) to the actuator.
2. Apply a vacuum of 39.9 kPa (300 mmHg, 11.8 in.Hg) to the actuator and check that the actuator rod moves.
3. One minute after applying the vacuum, check that the rod's position is the same as in step (a).

If the result is not as specified, replace the IAC valve actuator.

Fig 1: Inspect Intake Air Control Valve Actuator

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1. Connect the MITYVAC (hand-held vacuum pump) to port A.
2. Apply a vacuum of 66.7 kPa (500 mmHg, 20 in.Hg) to the vacuum tank.
3. One minute after applying the vacuum, check that the pressure does not change.

If the result is not as specified, replace the vacuum control valve set.

Fig 2: Inspecting Vacuum Tank

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1. Measure the VSV resistance.
   Fig 3: Measuring VSV Resistance

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   Standard: 

   VACUUM SWITCHING VALVE ASSY FOR IAC VALVE
   
   

   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 resistance is not as specified, replace the VSV assy.

2. Check the VSV operation.
   1. Check that air flows from port E to the filter.

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

      Fig 4: Checking Air Flows From Port E To Filter

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   2. Apply battery positive 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 assy.

   Fig 5: Checking Air Flows From Port E To Port F

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