See also:

Audio/video remote controls (steering switches)
Some parts of the audio system can be adjusted using the switches on the steering wheel. Details of the specific switches, controls, and features are described below. 1. Volume control switch 2 ...

Map scale
Touch or to change the scale of the map display. The scale bar and indicator at the bottom of the screen indicates the map scale menu. The scale range is 150 feet (50 m) to 250 miles (400 km) ...

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. ...