ABS with roll stability control (RSC) and traction control

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

ABS with roll stability control (RSC) and traction control consists of the following components:

ABS module
HCU (LH side of the engine compartment, behind the degas bottle)
Front wheel speed sensor
Front wheel speed sensor ring (press fit onto the brake disc)
Rear wheel speed sensor
Rear wheel speed sensor ring (press fit onto the brake disc)
Stability control sensor cluster (under the passenger seat)
Steering wheel rotation sensor (attached to the steering column)

The ABS prevents wheel lock up by monitoring the wheel speed sensors and actuating the valves in the HCU which modulates the brake pressure to the brake calipers. By preventing the wheels from locking up, the driver is able to maintain steering control and stop in the shortest possible distance under most conditions. The traction control system utilizes the same components as the ABS to prevent wheel spin and help maintain vehicle control during acceleration. The RSC system utilizes the same components as the ABS and the traction control systems and also monitors the steering wheel rotation sensor and the stability control sensor cluster to assist in stabilizing the vehicle during abrupt maneuvers.