EM/Engine Mechanical, page 14

EM-14                                ENGINE MECHANICAL — Timing Belt

(b) If the belt teeth are cracked or damaged, check to see
    if the camshaft is locked.

(c) If there is noticeable wear or cracks on the belt face,
    check to see if there are nicks on one side of the idler
    pulley loci*

(d) If there is wear or damaged on only one side of the
    belt, check the belt guide and the alignment of each
    pulley.

(e) If there is noticeable wear on the belt teeth, check
    the timing belt cover gasket for damage and check
    for correct gasket installation. Check for foreign
    material on the pulley teeth.

2. INSPECT IDLER PULLEY AND TENSION SPRING
   (a) Check the turning smoothness of the timing belt idler
       pulley.
   (b) Check the free length of the tension spring.
       If not as specified, use a new one.
       Free length: 69 mm (2.72 in.)

69 mm