Black plate (23,1)Cadillac XTS Owner Manual (GMNA-Localizing-MidEast-8087803) - 2015 -crc - 6/24/14Driving and Operating 9-23Drive SystemsAll-Wheel DriveIf equipped, this feature transferstorque to the rear wheels asrequired. It is fully automatic, andadjusts itself as needed for roadconditions.All-Wheel Drive (AWD) performanceis automatically reduced when youuse the compact spare. To restorefull AWD performance, and preventexcessive wear to the clutch in theAWD system, replace the compactspare tire with a full-size tire assoon as possible. See CompactSpare Tire on page 10-59.BrakesAntilock BrakeSystem (ABS)This vehicle has ABS, an advancedelectronic braking system that helpsprevent a braking skid.When the vehicle begins to driveaway, ABS checks itself.A momentary motor or clicking noisemight be heard while this test isgoing on, and it might even benoticed that the brake pedal movesa little. This is normal.If there is a problem with ABS, thiswarning light stays on. See AntilockBrake System (ABS) Warning Lighton page 5-22.If driving safely on a wet road and itbecomes necessary to slam on thebrakes and continue braking toavoid a sudden obstacle, acomputer senses the wheels areslowing down. If one of the wheelsis about to stop rolling, the computerwill separately work the brakes ateach wheel.ABS can change the brake pressureto each wheel, as required, fasterthan any driver could. This can helpyou steer around the obstacle whilebraking hard.As the brakes are applied, thecomputer keeps receiving updateson wheel speed and controlsbraking pressure accordingly.Remember: ABS does not changethe time needed to get a foot up tothe brake pedal or always decreasestopping distance. If you get tooclose to the vehicle in front of you,there will not be enough time toapply the brakes if that vehicle
