You need to remove the accessory
Drive Belt, remove the engine shield bolts and the engine shield, install a ratchet into the air conditioning (A/C) belt tensioner adapter opening, rotate the A/C belt tensioner clockwise to relieve tension on the belt, remove the A/C belt from the pulleys, release the tension on the A/C belt tensioner, remove the ratchet from the A/C belt tensioner, clean and inspect the belt surfaces of all the pulleys.