Symptom Chart

WARNING: This page is about a different car, the 2012 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
Accessory drive belt cracking (over 15 cracks in a rib over a distance of 100 mm [4.0 in])	Accessory drive belt	INSPECT the accessory drive belt. REFER to INSPECTION AND VERIFICATION . INSTALL a new accessory drive belt as necessary.
Accessory drive belt chunking	Accessory drive belt	INSPECT the accessory drive belt. REFER to INSPECTION AND VERIFICATION . INSTALL a new accessory drive belt as necessary.
Accessory drive belt chunking	Damaged pulley grooves	INSPECT the accessory drive belt pulley grooves for damage. INSTALL a new pulley or component as necessary.
Accessory drive belt noise, squeal, chirping or flutter	Defective/worn or incorrect accessory drive belt Misaligned pulley(s) Pulley runout Damaged or worn accessory drive component or idler Fluid contamination of accessory drive belt or pulleys	REFER to , DRIVE BELT - NOISE/FLUTTER . REPAIR or INSTALL new parts as necessary.
	Damaged or worn accessory drive belt tensioner	REFER to , BELT TENSIONER - MECHANICAL and BELT TENSIONER - DYNAMICS . INSTALL a new accessory drive belt tensioner as necessary.
	Damaged pulley grooves	INSPECT the accessory drive belt pulley grooves for damage. INSTALL a new pulley or component as necessary.
	Accessory drive component failure	CHECK the accessory drive components. INSTALL new components as necessary.
	Accessory drive belt idler pulley bearing failure	INSPECT the accessory drive belt idler pulley for freedom of rotation and damage. INSTALL a new accessory drive belt idler pulley as necessary.
Supercharger (SC) drive belt squeal during 1st to 2nd gear shift under hard acceleration	SC drive belt system	This is a normal characteristic of this vehicle under this driving condition. This is due to the transmission being shifted faster than the SC drive belt system can respond.
Premature accessory drive belt wear	Defective or incorrect accessory drive belt Misaligned pulley(s) Pulley runout Damaged accessories Incorrectly installed drive belt Fluid contamination	REFER to , DRIVE BELT - NOISE/FLUTTER and DRIVE BELT - INCORRECT INSTALLATION . REPAIR or INSTALL new parts as necessary.
Premature accessory drive belt wear	Damaged pulley grooves	INSPECT the accessory drive belt pulley grooves for damage. INSTALL a new pulley or component as necessary.