Back Light, LCD, Switch Light Check

Turn the combination light switch ON.

• Turn on the LCD back light.
• Turn on all LCD segments.
• Brings screen to full bright (with navigation).
• A beep sound is heard when pressing any climate control button (with navigation).

If the display panel control unit fails to complete any of the functions of the self-diagnostic function, go to the display panel control unit input test (see DISPLAY AND CONTROL UNIT INPUT TEST ).