2015 Jeep Cherokee Owner Manual - Page 489

STARTING AND OPERATING 487 Your vehicle is also equipped with Trailer Sway Control (TSC), Ready Alert Braking (RAB) and Rain Brake Support (RBS). Further, all vehicles equipped with a twospeed power transfer unit have Hill Descent Control (HDC) and some vehicles may also be equipped with Selec Speed Control (SSC). Anti-Lock Brake System WARNING! Significant over or under-inflation of tires or mixing sizes of tires or wheels on the vehicle can lead to loss of braking effectiveness. The ABS conducts a low-speed self-test at about 12 mph (20 km/h). If you have your foot lightly on the brake The Anti-Lock Brake System (ABS) is designed to aid the while this test is occurring, you may feel slight pedal driver in maintaining vehicle control under adverse movement. The movement can be more apparent on ice braking conditions. The system operates with a separate and snow. This is normal. computer to modulate hydraulic pressure, to prevent The ABS pump motor runs during the self-test at 12 mph wheel lock-up and help avoid skidding on slippery (20 km/h) and during an ABS stop. The pump motor surfaces. makes a low humming noise during operation, which is All vehicle wheels and tires must be the same size and normal. type, and tires must be properly inflated, to produce accurate signals for the computer. 5