Acura 3.5 RL Manual page 1328

Navigation System
System Diagnosis Mode (cont'd)
Black Raster
The entire display must be shown in black.
Test Pattern
The chart below; shows the colors being used for the
map and menu screens. This is for factory use only. To
check the color signal use the "RGB Color" diagnostic
found under the Monitor Check menu item.
Monitor Adjustment
This allows the navigation display to be centered. Use
the joystick to move the picture up/down or left/right. It
is unlikely that you will ever need to adjust the monitor
position. The "Default" button will reset the display
position to factory specifications.
Touch Panel
The panel touch sensing system consists of 9 horizontal
and 20 vertical infrared beams. Touching the screen
blocks both a horizontal and a vertical beam. Every pos-
sible touch position is shown on this diagnostic screen.
Touching one of these areas should cause its color to
reverse, and sound a "beep". If any areas of the screen
either don't respond, or respond at some other location
when touched, then replace the display unit. The
"Display" diagnostic listed in Unit Check provides an
additional method to determine if one of the infrared
sources or detectors is bad.
NOTE: Direct sunlight can affect this test by falsely trig-
gering the infrared detectors, so perform this diagnostic
inside or in a shaded area.