Drive Belt Tensioner Diagnosis

Diagnosis consists of a function check on the automatic belt tensioner and a visual check on the belt and the components linked to the belt.

Fig 1: Cast Projection
Courtesy of GENERAL MOTORS CORP.
• Apply tension to the belt tensioner via the cast projection (1) in the direction of the arrow, counterclockwise, and allow to slide back slowly.
• The tensioner must slide back to the initial position.