Toyota 4Runner 2001-06

Idle Air Control Valve

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Removal & Installation



  1. Drain the coolant to a level below the throttle body.
  2.  
  3. Remove the throttle body.
  4.  



Click image to see an enlarged view

Fig. Remove the screws mounting the IAC valve to the throttle body

  1. Remove the screws and the IAC valve. Discard the old gasket or O-ring.
  2.  

To install:

  1. Using a new gasket or O-ring, attach the IAC valve and secure the mounting screws.
  2.  
  3. Install the throttle body with new gaskets.
  4.  
  5. Fill the cooling system with the proper water/coolant mixture.
  6.  
  7. Start the engine, top off the cooling system. Check for leaks.
  8.  

Testing



5VZ-FE VIN N
  1. Connect the positive (+) lead from the battery to terminal +B and negative (-) lead to terminal RSC, and check that the valve is closed.
  2.  
  3. Connect the positive (+) lead from the battery to terminal +B and negative (-) lead to terminal RSO, and check that the valve is open.
  4.  
  5. If operation is not as specified, replace the IAC valve.

    Click image to see an enlarged view

    Fig. IAC valve testing-3.4L (5VZ-FE) VIN N

  6.  

 
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