See also:

Radio Theft Protection
Your vehicle’s audio system will disable itself if it is disconnected from electrical power for any reason. To make it work again, you must enter a specific code using the preset buttons (icon ...

Operating the System
If you do not operate the    system from the front panel for more than 20 seconds, the indicator in the button goes off, and the front display returns to what has previously been displayed ...

Gauges.
Gauges include the speedometer, tachometer, fuel gauge, and related indicators. They are displayed when the ignition switch is in ON Speedometer Displays your driving speed in mph (U.S.) or km/h ...