Hard Key
This diagnostic tests the interface dial, the buttons that surround it, and the audio remote switch For this model, the interface dial and buttons use the serial bus for communications
To complete the test, touch each button on the vehicle's control panel, and move the interface dial to each indicated position As each function is tested, the corresponding button on the display should highlight
To exit, push in and hold the selector knob
NOTE:
You cannot use the onscreen return button to exit this function