Before driving

See also:

DAC (Downhill Assist Control system)
The DAC helps to prevent excessive speed on steep downhill slopes. The system will operate when the vehicle is traveling under 15 mph (25 km/h) and the four-wheel drive control switch is in the L4 ...

LDA (Lane Departure Alert)
While driving on a freeway or motor highway that has lane markers, this system recognizes the lanes using a camera as a sensor to alert the driver when the vehicle deviates from its lane. If the ...

Have the vehicle inspected by your Lexus dealer immediately.
Failing to investigate the cause of the following warnings may lead to the system operating abnormally and possibly cause an accident. Have the vehicle inspected by your Lexus dealer immediately. ...