Brake Assist - Subaru 2007 B-9 Tribeca Technicians Reference Booklet

2007 New Model Update
(916)

BRAKE ASSIST

Brake Assist is a system designed to recognize emergency braking operation and automatically
enhance braking effort. Brake assist improves vehicle and occupant safety by reducing stopping
distances.
A pressure switch mounted on the Hydraulic Control Unit (HCU) monitors the pressure increase
from the master cylinder as the brakes are applied. When the pressure increases faster than normal,
Brake Assist activates. The driver may feel a slight pulsation in the brake pedal as the hydraulic
brake pressure applies maximum braking. (Pressure increase compared to time)
Releasing the brake pedal deactivates Brake Assist. (Brake switch and pressure switch input to
HCU)
* Refer to STIS (Subaru Technical Infromation System) *** New Feature
June 2006
2007 Subaru B9 Tribeca Page 51