1998 Buick Riviera Owner's Manual

Anti-Lock BrakesYour vehicle has anti-lock brakes (ABS). ABS is anadvanced electronic braking system that will helpprevent a braking skid.When you start your engine and begin to drive away,your anti-lock brake system will check itself. You mayhear a momentary motor or clicking noise while this testis going on, and you may even notice that your brakepedal moves a little. This is normal.IANTI - LOCKIf there’s a problem with theanti-lock brake system, thiswarning light will stay on.See “Anti-Lock BrakeSystem Warning Light’’ inthe Index.Here’s how anti-lock works. Let’s say the road is wet.You’re driving safely. Suddenly an animal jumps out infront of you.You slam on the brakes. Here’s what happens with ABS.A computer senses that wheels are slowing down. If oneof the wheels is about to stop rolling, the computer willseparately work the brakes at each front wheel and atboth rear wheels.4-7