2009 Hyundai Sonata Owner's Manual - Page 167

2 DRIVING YOUR HYUNDAI 14 C310B01NF-AAT C310D01NF-AAT ! ESC ON/OFF Mode CAUTION: When the ESC is operating, the ESC indicator in the instrument cluster will blink. If you turn the system off by pressing the ESC switch, the ESC-OFF indicator will come on and stay on. In the ESC-OFF mode, the stability control will be deactivated. Adjust your driving accordingly. To turn the system back on, press the switch again. The ESC-OFF indicator should go off. Indicators and Warning The indicators should illuminate when the ignition key is turned to ON or START but should go out after three seconds. If the indicators do not illuminate, or the ESC or ESC-OFF indicator does not go out after 3 seconds, have the vehicle checked by an authorized dealer. Should there be any unusual operation of the device while driving, the ESC-OFF indicator illuminates as a warning. If the ESC-OFF indicator illuminates, drive your car to a safe place and stop the engine. Then, start the engine again to check if the ESC-OFF indicator goes out. If the indicator remains lit even after the engine has been started, have your car checked by an authorized Hyundai dealer. Driving with varying tire or wheel sizes may cause the ESC system to malfunction. When replacing tires, make sure they are the same size as your original tires. NOTE: The ESC mode will automatically be turned ON after the engine is turned off and restarted.