Black plate (33,1)Cadillac CTS/CTS-V Owner Manual - 2011Driving and Operating 9-33Drive SystemsAll-Wheel DriveVehicles with this featurealways send engine power to allfour wheels. It is fully automatic,and adjusts itself as needed forroad conditions.When using a compact spare tireon an AWD vehicle, the systemautomatically detects the compactspare and disables AWD. To restoreAWD operation and preventexcessive wear on the system,replace the compact spare with afull-size tire as soon as possible.See Compact Spare Tire onpage 10‑106 for more information.BrakesAntilock BrakeSystem (ABS)This vehicle has the Antilock BrakeSystem (ABS), an advancedelectronic braking system that helpsprevent a braking skid.When the engine is started and thevehicle begins to drive away, ABSchecks itself. A momentary motor orclicking noise might be heard whilethis test is going on, and it mighteven be noticed that the brakepedal moves a little. This is normal.If there is a problem with ABS, thiswarning light stays on. See AntilockBrake System (ABS) Warning Lighton page 5‑23.If driving safely on a wet roadand it becomes necessary to slamon the brakes and continue brakingto avoid a sudden obstacle, acomputer senses that the wheelsare slowing down. If one of thewheels is about to stop rolling, thecomputer will separately work thebrakes at each wheel.ABS can change the brake pressureto each wheel, as required, fasterthan any driver could. This can helpthe driver steer around the obstaclewhile braking hard.As the brakes are applied, thecomputer keeps receiving updateson wheel speed and controlsbraking pressure accordingly.InformationProvidedby:
