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Air Control Valve: Inspection

  1. TURN AIR CONDITIONING SWITCH OFF 
  2. CHECK IDLE-UP 
    1. Start the engine and run it at idle.
    2. Fully turn the steering wheel.
    3. Check that the engine rotations decrease when the vacuum hose of the air control valve is pinched.
      Fig 1: Checking Engine Rotations Decrease When Vacuum Hose Of Air Control Valve Is Pinched
      G03077014Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Check that the engine rotations increase when the hose is released.
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