2008 Subaru Tribeca Owner's Manual - Page 253

Starting and operating 7-19 a loss of control of the vehicle. Keep driving straight ahead while gradually reducing speed. Then slowly pull off the road to a safe place. than normal and the braking distance will increase. NOTE Some sound accompanying operation of the vacuum pump may be heard from the engine compartment during driving. This does not indicate a fault. ! Brake assist system & Brake system ! Two separate circuits Your vehicle has a dual circuit brake system. Each circuit works diagonally across the vehicle. If one circuit of the brake system should fail, the other half of the system still works. If one circuit fails, the brake pedal will go down much closer to the floor than usual and you will need to press it down much harder. And a much longer distance will be needed to stop the vehicle. ! Brake booster The brake booster uses engine manifold vacuum to assist braking force. If engine manifold vacuum becomes insufficient, such as when driving in a high-altitude place, a vacuum pump assures a sufficient vacuum to operate the brake booster. Do not turn off the engine while driving because that will turn off the brake booster, resulting in poor braking power. The brakes will continue to work even when the brake booster completely stops functioning. If this happens, however, you will have to push the pedal much harder gle. This is a normal operation phenomenon, and it is not a malfunction. Brake assist is a driver assistance system. It assists the brake power when the driver cannot depress the brake pedal strongly and the brake power is insufficient. Brake assist generates the brake power according to the speed at which the driver depresses the brake pedal. WARNING Do not be overconfident about the brake assist. It is not a system that brings more braking ability to the vehicle beyond its braking capability. Always use the utmost care when driving regarding vehicle speed and safe distance. & Disc brake pad wear warning indicators CAUTION When you need to brake suddenly, continue depressing the brake pedal strongly to bring the effect of the brake assist. NOTE When you depress the brake pedal suddenly, the brake pedal might wig- The disc brake pad wear warning indicators on the disc brakes give a warning noise when the brake pads are worn. If a squeaking or scraping noise is heard from the disc brakes while braking, immediately have your vehicle inspected by - CONTINUED -