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 MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1276 (BRAKE SYSTEM - SERVICE INFORMATION)DIAGNOSTIC TESTSBRAKE SYSTEMSYMPTOM CHART - BRAKE SYSTEM

2009 Mercury Milan Premier, 3.0 1, AWD

Symptom Chart - Brake System

2009 Mercury Milan Premier, 3.0 1, AWDSECTION Symptom Chart - Brake System

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

Condition	Possible Sources	Action
The red brake warning indicator and the yellow ABS warning indicator are illuminated	DTCs in the ABS module	REFER to VEHICLE DYNAMIC SYSTEMS to diagnose the ABS module.
The red brake warning indicator is always/never on	Brake fluid level switch Parking brake switch Wiring, terminals or connectors Instrument cluster Smart junction box (SJB)	REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES to diagnose the red brake warning indicator.
The brakes pull or drift	Tires	INSPECT the tires for uneven or excessive wear, and correct inflation. REFER to WHEELS AND TIRES .
	Brake pads	INSPECT the brake pads for contamination, uneven taper or excessive wear. REFER to Brake Pads .
	Brake discs	INSPECT the brake discs and the hubs for contamination or damage, INSTALL new as necessary.
	Brake calipers and/or guide pins	INSPECT the brake calipers and guide pins, REFER to Brake Calipers and Brake Caliper Guide Pins .
	Suspension component and/or wheel alignment	INSPECT the suspension and CHECK the wheel alignment. REFER to SUSPENSION SYSTEM - GENERAL INFORMATION .
Brake pedal goes down fast	Brake fluid leaks and/or air in the system	INSPECT the system for leaks. REPAIR as necessary. FILL the brake master cylinder reservoir. BLEED the system. REFER to Brake System Bleeding .
	Brake master cylinder	CARRY OUT the Brake Master Cylinder Component Tests .
	Hydraulic control unit (HCU)	INSPECT the HCU. REFER to VEHICLE DYNAMIC SYSTEMS .
The brake pedal eases down slowly	Air in the system	BLEED the system. REFER to Brake System Bleeding .
	Brake master cylinder	CARRY OUT the Brake Master Cylinder Component Tests .
	HCU	INSPECT the HCU. REFER to VEHICLE DYNAMIC SYSTEMS .
Brakes lock up under light brake pedal force	Brake pads	INSPECT the brake pads for uneven taper or excessive wear, REFER to Brake Pads .
	Brake calipers and/or guide pins	INSPECT the brake calipers and guide pins, REFER to Brake Calipers and Brake Caliper Guide Pins .
	Anti-lock brake control system	CHECK the anti-lock brake control system. REFER to VEHICLE DYNAMIC SYSTEMS .
Excessive/erratic brake pedal travel	Brake fluid leaks and/or air in the system	INSPECT the system for leaks. REPAIR as necessary. BLEED the system. REFER to Brake System Bleeding .
	Brake calipers and/or guide pins	INSPECT the brake calipers and guide pins, REFER to Brake Calipers and Brake Caliper Guide Pins .
	Brake flexible hose	INSPECT the brake flexible hoses for swelling and damage. INSTALL new as necessary. REFER to FRONT DISC BRAKE for front disc brakes or REAR DISC BRAKE for rear disc brakes.
	Brake master cylinder	CARRY OUT the Brake Master Cylinder Component Tests .
	Brake pads	INSPECT the brake pads for taper wear, REFER to Brake Pads .
	Brake pedal	INSPECT the brake pedal for binding, obstructions and correct installation. REPAIR as necessary. CHECK the brake pedal fasteners for correct torque. REFER to Specifications in HYDRAULIC BRAKE ACTUATION .
	Anti-lock brake control system	CHECK the anti-lock brake control system. REFER to VEHICLE DYNAMIC SYSTEMS .
Brakes drag	Parking brake component	REPAIR or INSTALL new components as necessary. REFER to PARKING BRAKE AND ACTUATION .
	Brake caliper guide pins	INSPECT the caliper guide pins for correct operation. INSTALL new components as necessary. REFER to Brake Caliper Guide Pins .
	Disc brake caliper(s)	REPAIR or INSTALL new brake calipers as necessary. REFER to FRONT DISC BRAKE for front disc brakes or REAR DISC BRAKE for rear disc brakes.
	Brake booster	CARRY OUT the Brake Booster Component Tests .
	Brake master cylinder	CARRY OUT the Brake Master Cylinder Component Tests .
Excessive brake pedal effort	Insufficient engine vacuum for brake booster operation	CHECK engine vacuum. REFER to the Intake Manifold Vacuum Test in ENGINE SYSTEM - GENERAL INFORMATION .
	Brake booster manifold vacuum hose	VERIFY engine vacuum at the booster. REROUTE, REPAIR or INSTALL new components as necessary.
	Brake booster	VERIFY engine vacuum at the booster. CARRY OUT the Brake Booster Component Tests .
	Brake booster check valve	VERIFY engine vacuum at the booster. CARRY OUT the Check Valve Component Tests .

RENDER: 1.0x

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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.