TENSIONER-Accessory Drive Belt: Description
WARNING: This page is about a different car, the 2006 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
The automatic belt tensioner maintains proper tension on the power steering and air conditioning belt. The tensioner pulley can be serviced separately.
NOTE:
Tensioner arm should move freely and maintain 33-46 lb. tension on belt.