Intake Air Control System (3MZ-FE): Inspection

1. Check the operation.
   1. With vacuum of 26.7 kPa (200 mmHg, 7.9 in.Hg) applied to the actuator, check that the valve closes.
   2. 1 minute after applying the vacuum, check that the valve remains closed.
      Fig 1: Inspecting Intake Air Control Valve Assembly No-2

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the operation is not as specified, replace the intake air control valve No. 2.

1. Check the operation.
   1. With vacuum of 26.7 kPa (200 mmHg, 7.9 in.Hg) applied to the actuator, check that the valve opens.
   2. 1 minute after applying the vacuum, check that the valve remains opened.

   If the operation is not as specified, replace the intake air control valve No. 3.

   Fig 2: Inspecting Intake Air Control Valve Assembly No-3

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2. Inspect the resistance.
   1. Using an ohmmeter, measure the resistance between the terminals.
   1. Resistance: 
   TERMINALS RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   1 - 2	37 to 44Ω at 20° C (68° F)

   If the resistance is not as specified, replace the intake air control valve No. 3.

   Fig 3: Measuring Resistance Between Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the continuity.
   1. Using an ohmmeter, check that there is no continuity between each terminal and the body.

   If there is continuity, replace the intake air control valve No. 3.

   Fig 4: Checking Continuity Between Each Terminals & Body

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check the operation.
   1. Check that air flows from port E to the filter.
      Fig 5: Checking Air Flows From Port E To Filter

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   2. Apply battery voltage across the terminals.
   3. Check that air flows from port E to F.

   If the operation is not as specified, replace the intake air control valve No. 3.

   Fig 6: Applying Battery Voltage & Checking Air Flows From Port E To F

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Inspect the resistance.
   1. Using an ohmmeter, measure the resistance between the terminals.
   1. Resistance: 
   TERMINALS RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   1 - 2	33 to 39Ω at 20° C (68° F)

   If the resistance is not as specified, replace the vacuum switching valve No. 1.

   Fig 7: Measuring Resistance Between Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the continuity.
   1. Using an ohmmeter, check that there is no continuity between each terminal and the body.

   If there is continuity, replace the vacuum switching valve No. 1.

   Fig 8: Checking Continuity Between Terminals & Body

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the operation.
   1. Check that air flows from port E to the filter.
      Fig 9: 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 F.

   If the operation is not as specified, replace the vacuum switching valve No. 1.

   Fig 10: Applying Voltage To Terminals & Checking Air Flows From Port E To F

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the operation.
   1. Cover port C with your finger, then check that the air flow from port B to A.
   2. Cover port C with your finger, then check that the air does not flow from port A to B.
   3. Cover ports A and C with your fingers, then apply 60 kPa (450 mmHg, 18 in.Hg) of vacuum to port B. Check that there is no vacuum change after 1 minute.

   If the operation is not as specified, replace the air cleaner cap.

   Fig 11: Inspecting Air Cleaner Cop Sub-Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002