Ford Probe 1989-1992 Repair Guide

Description and Operation


The Anti-lock Brake System (ABS) releases and applies brake fluid pressure to the brake calipers during special braking conditions. ABS does not function under normal braking conditions, nor does it affect front to rear brake proportioning. When one or more wheels begins to lock up, ABS automatically senses the condition and activates the pressure control function.

The ABS control module is located under the driver's seat. Through its preprogramming, the control module decides which wheel(s) need brake pressure modulation. Once the decision is made, the control module sends the appropriate signals to the solenoid valves located in the hydraulic actuation assembly. The solenoid valves modulate fluid pressure through the flow control valves, resulting in reduced pressure at the caliper(s) to prevent further lockup.

The anti-lock brake system consists of all standard brake system components as well as the following components:

Control module
Hydraulic actuation assembly
ABS relay
Speed sensors
Wheel sensor rotors

Click image to see an enlarged view

Fig. Fig.1Anti-lock brake system