2008 Acura RDX Owner's Manual - Page 308

Main Menu Table Of Contents Braking System Your vehicle is equipped with disc brakes at all four wheels. A power assist using negative pressure generated by the engine and the electric vacuum pump helps reduce the effort needed on the brake pedal. The anti-lock brake system (ABS) helps you retain steering control when braking very hard. When the electric vacuum pump is in operation, it makes some mechanical noises come from the engine compartment. This is normal. When you drive in cold weather or thinner air at high altitude, the electric vacuum pump operates more frequently after the engine is started. For more information about the electric vacuum pump, see page 384 . Resting your foot on the pedal keeps the brakes applied lightly, builds up heat, and reduces their effectiveness and reduces brake pad life. In addition, fuel economy can be reduced. It also keeps your brake lights on all the time, confusing drivers behind you. Constant application of the brakes when going down a long hill builds up heat and reduces their effectiveness. Use the engine to assist the brakes by taking your foot off the accelerator and downshifting to a lower gear. Check your brakes after driving through deep water. Apply the brakes moderately to see if they feel normal. If not, apply them gently and frequently until they do. Be extra cautious and alert in your driving. Braking System Design The hydraulic system that operates the brakes has two separate circuits. Each circuit works diagonally across the vehicle (the left-front brake is connected with the right-rear brake, etc.). If one circuit should develop a problem, you will still have braking at two wheels. Brake Pad Wear Indicators All four brakes have audible brake wear indicators. If the brake pads need replacing, you will hear a distinctive, metallic screeching sound when you apply the brake pedal. If you do not have the brake pads replaced, they will screech all the time. It is normal for the brakes to occasionally squeal or squeak when you apply them. 304 2008 RDX