Antilock Brakes / Traction Control Systems: Description and Operation

Anti-Lock Control

Anti-Lock Brake System (ABS) With Traction Control
The anti-lock brake system (ABS) is a 4-channel system and consists of the following components:
^ ABS module
^ Front wheel speed sensor
^ Front wheel speed sensor ring (integral to the front wheel bearing)
^ Hydraulic control unit (HCU)Rear wheel speed sensor
^ Rear wheel speed sensor ring (integral to the rear wheel bearing)
^ Traction control switch
^ Yellow ABS warning indicator

The front wheel speed sensor rings are integral to the front hub and bearing assemblies.

The rear wheel speed sensor rings are integral to the rear hub and bearing assemblies.