Continental 2000-2002

Description & Operation


The Anti-lock Brake System (ABS) and the traction control system consists of the following components:

Anti-lock Brake Control Module
Hydraulic Control Unit (HCU)
Rear Anti-Lock Brake Sensors
Rear Anti-Lock Brake Sensor Indicators
Front Anti-Lock Brake Sensors
Front Anti-Lock Brake Sensor Indicators
Vehicle Message Center
Yellow ABS Warning Indicator
Yellow TRAC OFF Indicator

The 4-Wheel Anti-lock Brake System (ABS) is an electronically operated, all wheel brake control system. Major components include the power brake booster, master cylinder, the wheel speed sensors, and the Hydraulic Control Unit (HCU) which contains the control module, a relay, and the pressure control valves.

The system is designed to retard wheel lockup during periods of high wheel slip when braking. Retarding wheel lockup is accomplished by modulating fluid pressure to the wheel brake units. When the control module detects a variation in voltage across the wheel speed sensors, the ABS is activated. The control module opens and closes various valves located inside the HCU. These valves, called dump and isolation valves, modulate the hydraulic pressure to the wheels by applying and venting the pressure to the brake fluid circuits.

Some models are equipped with a Traction Assist (TA) system. The TA system senses wheel spin upon acceleration, turns on the Hydraulic Control Unit (HCU) pump and applies fluid pressure to the appropriate rear wheel. Two additional isolation valves in the HCU will also close to permit fluid to flow only to the rear wheels.

The TA system monitors TA usage to avoid overheating the rear brakes. If the system does sense brake overheating, the ABS module will inhibit TA operation until the rear brakes are permitted to cool down.

System Components

The anti-lock brake system consists of the following components:

Vacuum booster and master cylinder assembly
Hydraulic Control Unit (HCU)
ABS module
Wheel sensors
Pedal travel switch