2007 Subaru Impreza Owner's Manual - Page 234

7-26 Starting and operating ing driving. If these occur, have the ABS system repaired at the first available opportunity by your SUBARU dealer. 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 fail, 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 NOTE If the warning light behavior is as described below, the ABS system may be considered normal. . The warning light comes on right after the engine is started but goes out immediately, remaining off. . The warning light remains on after the engine has been started, but it goes out when the vehicle speed reaches approximately 8 mph (12 km/h). . The warning light comes on during driving, but it goes out immediately and remains off. Turbo models Non-turbo models If a malfunction occurs in the EBD system,