Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSMERCURY2010MARINER HYBRID, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1190 (ACCESSORY DRIVE SYSTEM - 3.0L)DIAGNOSIS AND TESTINGACCESSORY DRIVESYMPTOM TABLE

2010 Mercury Mariner Hybrid, AWD

Symptom Table

2010 Mercury Mariner Hybrid, AWDSECTION Symptom Table

WARNING: This page is about a different car, the 2010 Mercury Milan and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM TABLE

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.
-	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 COMPONENT TESTS , DRIVE BELT - NOISE/FLUTTER . REPAIR or INSTALL new parts as necessary.
-	Damaged or worn accessory drive belt tensioner	REFER to COMPONENT TESTS , 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.
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 COMPONENT TESTS , DRIVE BELT - NOISE/FLUTTER and DRIVE BELT - INCORRECT INSTALLATION . REPAIR or INSTALL new parts as necessary.
-	Damaged pulley grooves	INSPECT the accessory drive belt pulley grooves for damage. INSTALL a new pulley or component as necessary.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.