Scion 2005-06

Idle Air Control Valve

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Testing



  1. Check that the IAC valve is half open.
  2.  
  3. Connect the IAC valve connector to the IAC valve.
  4.  
  5. Disconnect the ECT sensor connector from the ECT sensor.
  6.  
  7. Turn the ignition switch ON.
  8.  
  9. Check that the IAC valve moves.
  10.  
  11. Repeat connecting and disconnecting of IAC valve connector several times and check the operation of the valve.
  12.  
  13. If operation is not as specified, replace the IAC valve.
  14.  
  15. Turn the ignition switch OFF.
  16.  
  17. Connect the ECT sensor connector to the ECT sensor.

    Click image to see an enlarged view

    Fig. Idle Air Control Valve-1.5L (1NZ-FE) VIN T

  18.  

  1. Check that the IAC valve is half open.
  2.  
  3. Connect the IAC valve connector to the IAC valve.
  4.  
  5. Disconnect the ECT sensor connector from the ECT sensor.
  6.  
  7. Turn the ignition switch ON.
  8.  
  9. Check that the IAC valve moves.
  10.  
  11. Repeat connecting and disconnecting of IAC valve connector several times and check the operation of the valve.
  12.  
  13. If operation is not as specified, replace the IAC valve.
  14.  
  15. Turn the ignition switch OFF.
  16.  
  17. Connect the ECT sensor connector to the ECT sensor.

    Click image to see an enlarged view

    Fig. Idle Air Control Valve-1.5L (1NZ-FE) VIN T

  18.  

 
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