Symptom Chart

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the anti-lock brake system (ABS) module	Circuitry. ABS module.	REFER to VEHICLE DYNAMIC SYSTEMS .
The red brake warning indicator is always on	Circuitry. Brake fluid level switch. Parking brake switch. Instrument cluster. Anti-lock brake system (ABS) module.	GO to PINPOINT TEST B .
The red brake warning indicator is never on	Bulb. Instrument cluster.	REFER to INSTRUMENT CLUSTER .
Brakes drag	Parking brake component.	REPAIR or INSTALL new components as necessary. REFER to PARKING BRAKE & ACTUATION .
	Brake caliper guide pins.	REPAIR or INSTALL new caliper guide pins. REFER to FRONT DISC BRAKE for front disc brakes or REAR DISC BRAKE for rear disc brakes.
	Disc brake caliper.	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 master cylinder.	CARRY OUT the in this section.
Excessive brake pedal effort	Brakes are in manual mode.	CARRY OUT the ABS module self-test. RECORD the DTCs. REFER to the ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODED (DTC) INDEX .
Clicking noise - with brakes applied and anti-lock brake system (ABS) engaged	ABS hydraulic control unit.	Acceptable condition.
Squealing noise - occurs on first (morning) brake application	Brake pads.	Acceptable condition. Caused by humidity and low brake pad temperature.
Squealing noise - a continuous squeal	Brake pads worn below minimum thickness.	NOTE: The rear brake pads wear at approximately twice the rate of the front brake pads. INSPECT the brake pads for excessive wear, taper wear or uneven wear. VERIFY the brake pads are within the minimum specifications. REFER to FRONT DISC BRAKE for the front disc brakes or REAR DISC BRAKE for the rear disc brakes.
Grinding noise - continuous	Brake pads worn below minimum thickness.	NOTE: The rear brake pads wear at approximately twice the rate of the front brake pads. INSPECT the brake pads for excessive wear taper wear or uneven wear. VERIFY the brake pads are within the minimum specifications. REFER to FRONT DISC BRAKE for front disc brakes or REAR DISC BRAKE for rear disc brakes.
Moaning noise	Brake linings contaminated with grease or oil.	INSPECT the brake pads for contamination. REPAIR or INSTALL new components as necessary. REFER to FRONT DISC BRAKE for front disc brakes or REAR DISC BRAKE for rear disc brakes.
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 FRONT DISC BRAKE .
	Brake drag.	NOTE: The rear brake pads wear at approximately twice the rate of the front pads. INSPECT the brake pads for premature wear. REPAIR or INSTALL a new caliper as necessary. REFER to FRONT DISC BRAKE for front disc brakes or REAR DISC BRAKE for rear disc brakes.