Check the camshaft sprocket and crankshaft sprocket for abnormal wear, cracks, or damage. Replace as necessary.

Inspect the tensioner arm and chain guide for abnormal wear, cracks, or damage. Replace as necessary.

Check that the tensioner piston moves smoothly when the ratchet pawl is released with thin rod.

Check the idler for excessive oil leakage, abnormal rotation or vibration. Replace if necessary.

Check the belt tensioner for excessive dust, crack, and damage. Replace if necessary.

Check belt for maintenance and abnormal wear of V-ribbed part. Replace if necessary.

Check the pulleys for vibration in rotation, oil or dust deposit of V-ribbed part. Replace if necessary.