The Bendix ABX-4 type 4 Anti-lock Brake System (ABS) was an option on the 1995-97 Neons. Beginning in 1998, Neons are equipped with the Teves Mark 20 ABS system. Both of these ABS systems operate in basically the same manner, however, they may use some different components.
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 under heavy braking conditions. This system offers 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 locking tendency is detected during application, the system will enter anti-lock mode. During anti-lock mode, hydraulic pressure in the four wheel circuits is modulated to prevent any 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 Controller Anti-lock Brake (CAB).
Failure to observe the following precautions may result in system damage: