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 MANUALSFORD2004FOCUS ZX5, 2.3 Z, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESMECHANICAL - HYDRAULICBRAKE SYSTEM - GENERAL INFORMATIONDIAGNOSIS AND TESTINGBRAKE SYSTEMSYMPTOM CHART

2004 Ford Focus ZX5, 2.3 Z, Standard

Symptom Chart

2004 Ford Focus ZX5, 2.3 Z, StandardSECTION Symptom Chart

PROBLEM SYMPTOM CHART

Condition	Possible Sources	Action
The red brake warning indicator is always on	Brake fluid level.	FILL the brake fluid reservoir to the MAX line.
The red brake warning indicator is always on	Circuitry. Instrument cluster.	REFER to INSTRUMENT CLUSTER .
Red brake warning indicator inoperative	Circuitry. Bulb.	REFER to INSTRUMENT CLUSTER .
The brakes pull or drift	Tire air pressure.	CHECK the tires for uneven or excessive wear, and correct inflation.
	Brake pads or shoes.	CHECK the brake pads and shoes for uneven taper or excessive wear. REPAIR as necessary.
	Brake components.	CHECK the brake discs and drums and the hubs for damage. REPAIR as necessary.
	Suspension component. Wheel alignment.	CHECK the wheel alignment. REFER to WHEEL ALIGNMENT PROCEDURES .
Brake pedal goes down fast	Brake fluid level.	INSPECT the system for leaks. FILL the brake master cylinder reservoir. BLEED the system. REFER to BRAKE SYSTEM BLEEDING .
	Air in system.	INSPECT the system for leaks. BLEED the system. REFER to BRAKE SYSTEM BLEEDING .
	Brake master cylinder.	CARRY OUT MASTER CYLINDER component test.
The brake pedal eases down slowly	Air in system.	INSPECT the system for leaks. BLEED the system. REFER to BRAKE SYSTEM BLEEDING .
The brake pedal eases down slowly	Brake master cylinder.	CARRY OUT MASTER CYLINDER component test.
Brake lockup under light brake pedal force	Brake pads and shoes.	CHECK the brake pads and shoes for uneven taper or excessive wear. REPAIR as necessary.
	Brake component.	CHECK the brake components for correct operation. REPAIR as necessary.
	Parking brake component.	REPAIR or INSTALL new components as necessary. REFER to DISC & DRUM .
	Anti-lock brake control system.	CHECK the anti-lock brake control system. REFER to ANTI-LOCK CONTROL .
Excessive/erratic brake pedal travel	Leak in hydraulic system. Air in system. Disc brake caliper(s) or wheel cylinder(s).	INSPECT the system for leaks. BLEED the system. REFER to BRAKE SYSTEM BLEEDING .
	Brake master cylinder.	CARRY OUT MASTER CYLINDER component test.
	Brake pads.	CHECK the brake pads for excessive wear.
	Brake pedal.	CHECK the brake pedal for binding or obstructions. REPAIR as necessary.
Brakes drag	Parking brake component.	REPAIR or INSTALL new components as necessary. REFER to DISC & DRUM .
	Brake caliper guide pins.	REPAIR or INSTALL new caliper guide pins, seals and boots. REFER to DISC & DRUM .
	Disc brake calipers or wheel cylinders.	REPAIR or INSTALL new brake calipers or wheel cylinders as necessary. REFER to FRONT BRAKE CALIPER & PADS , REAR BRAKE CALIPER & PADS or WHEEL CYLINDER .
	Brake booster.	CARRY OUT BRAKE BOOSTER component test.
	Brake master cylinder.	CARRY OUT MASTER CYLINDER component test.
Vibration when the brakes are applied	Uneven brake pad or brake shoe wear.	COMPLETE the brake system inspection described in INSPECTION AND VERIFICATION .
Vibration when the brakes are applied	Brake disc pad transfer. Brake disc or drum. Suspension components.	Go To PINPOINT TEST A .
Brake vibration/shudder - occurs when the brake pedal is released	Brake caliper guide pins.	INSPECT the brake caliper guide pins for correct operation. REFER to BRAKE CALIPER GUIDE PINS .
	Brake drag.	INSPECT the brake pads and shoes for premature wear. REPAIR or INSTALL a new caliper or wheel cylinder as necessary. REFER to FRONT BRAKE CALIPER & PADS , REAR BRAKE CALIPER & PADS or WHEEL CYLINDER .
Excessive brake pedal effort	Brake booster.	CARRY OUT BRAKE BOOSTER component test.
	Brake booster check valve.	CARRY OUT CHECK VALVE component test.
	Brake booster manifold vacuum hose.	RE-ROUTE, REPAIR or INSTALL new components as necessary.
Rattling noise	Caliper mounting bolts loose.	CHECK the caliper bolts. TIGHTEN to specifications. REFER to DISC BRAKE SPECIFICATIONS .
	Damaged or worn caliper guide pins or retainers.	CHECK the caliper guide pins and retainers for lubrication and correct operation. LUBRICATE or INSTALL new components as necessary. REFER to BRAKE CALIPER GUIDE PINS .
	Missing or damaged anti-rattle clips or springs.	CHECK the brake pads for missing clips or broken springs. INSTALL new components as necessary. REFER to DISC & DRUM .
	Brake disc shield.	CHECK for loose or damaged disc brake shields. REPAIR or INSTALL new components as necessary. REFER to DISC & DRUM .
Clicking noise - with brakes applied with ABS brakes	ABS hydraulic control unit.	Acceptable condition.
Squealing noise - occurs on first (morning) brake application	Brake pads or shoes.	Acceptable condition. Caused by humidity and low brake pad temperature.
Squealing noise - a continuous squeal	Brake pads or shoes worn below minimum thickness.	INSPECT the brake pads and shoes for excessive wear, taper wear or uneven wear. VERIFY the brake pads and shoes are within minimum specifications. REFER to BRAKE PADS and BRAKE SHOES .
Squealing noise - an intermittent squeal brought on by cold, heat, water, mud or snow	Brake pads or shoes.	Acceptable condition.
Groaning noise - occurs at low speeds with brake lightly applied (creeping)	Brake pads or shoes.	Acceptable condition.
Grinding noise - continuous	Brake pads or shoes worn below minimum thickness.	INSPECT the brake pads, brake discs, brake shoes, brake drums and attaching hardware for damage. VERIFY the brake components are within specifications. REFER to DISC BRAKE SPECIFICATIONS and/or DRUM BRAKE SPECIFICATIONS .
Moaning noise	Brake pads or shoes contaminated with grease or oil.	INSPECT the brake pads and shoes for contamination. REPAIR or INSTALL new components as necessary. REFER to DISC & DRUM .

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.