When conventional brakes are applied in an emergency stop or on ice, one or more wheels may lock. This may result in loss of steering control and vehicle stability. The purpose of the Anti-lock Brake System (ABS) is to prevent lock up when traction is marginal or under heavy braking conditions. This system offers many benefits allowing the driver increased safety and control during braking. Anti-lock braking operates only at speeds above 3 mph (5 km/h).
Under normal braking conditions, the ABS functions the same as a standard brake system with a diagonally split master cylinder and conventional vacuum assist.
If wheel lock is detected during the brake application, the system will enter anti-lock mode. During anti-lock mode, hydraulic pressure in the four wheel circuits is modulated to prevent any one wheel from locking. Each wheel circuit is designed with a set of electrical valves and hydraulic line to provide modulation, although for vehicle stability, both rear wheel valves receive the same electrical signal. The system can build or reduce pressure at each wheel, depending on signals generated by the Wheel Speed Sensors (WSS) at each wheel and received at the control module.
Anti-lock braking systems (ABS) are available on all models. When this system engages, some audible noise as well as pulses in the brake pedal may occur. Do not be alarmed; this is normal system operation.