2005 Subaru Legacy Owner's Manual - Page 396

Starting and operating Electronic Brake Force Distribution (EBD) system The EBD system maximizes the effectiveness of the brakes by allowing the rear brakes to supply a greater proportion of the braking force. It functions by adjusting the distribution of braking force to the rear wheels in accordance with the vehicle's loading condition and speed. The EBD system is an integral part of the ABS system and uses some of the ABS system's components to perform its function of optimizing the distribution of braking force. If any of the ABS components used by the EBD function fails, the EBD system also stops working. When the EBD system is operating, you may hear a chattering noise or feel a slight vibration in the brake pedal. This is normal and does not indicate a malfunction. ! Steps to take if EBD system fails UB7507QA If a malfunction occurs in the EBD system, the system stops working and the brake system warning light and ABS warning light come on simultaneously. The EBD system may be faulty if the brake system warning light and ABS warning light illuminate simultaneously during driving. Even if the EBD system fails, the conventional braking system will still function. However, the rear wheels will be more prone to locking when the brakes are applied harder than usual and the vehicle's motion may therefore become somewhat harder to control. If the brake system warning light and ABS warning - CONTINUED - 7-41