Intake Air Control System: Inspection

1. Inspection procedure when applying voltage between terminals.
   1. Disconnect the connector from the intake air control valve.
   2. Apply battery voltage between terminals 1 (-) and 2 (+) of the intake air control valve. Check that a clicking sound is heard from the intake air control valve.
      Fig 1: Checking Intake Air Control Valve Assy

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If the result is not as specified, replace the intake air surge tank.

1. Apply 26.6 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 keep the valve open.

If the result is not as specified, replace the air cleaner assy.

Fig 2: Applying Vacuum To Actuator

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1. Check the VSV resistance.

   Standard: 

   VACUUM SWITCHING VALVE TERMINALS RESISTANCE
   
   

   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.

   Fig 3: Checking Resistance Between Vacuum Switching Valve Terminals

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

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   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.

Fig 5: Applying Battery Voltage Across Terminals And Checking Air Flows From Port E To Port F

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002