Acura 3.5 RL Manual page 1327

Monitor Check
Overview of display unit
• The display unit communicates with the navigation
unit over its own GA-Net bus. Information is sent to
the navigation unit whenever the user activates the
touch screen, or hard buttons. Information sent by
the navigation unit to the display unit includes com-
mands to control the LCD back light.
• The navigation unit also sends navigation informa-
tion to the screen using the Red, Green, Blue, and
Composite Video signals.
• The display unit is protected by the security system
by daisy-chaining the security signal through it, and
then passing the signal to the audio unit.
• The illumination input from the gauge brightness
control provides back lighting for the hard buttons
surrounding the screen.
• The display unit also communicates with the climate
control module to set the A/C mode, and fan speed.
These screens allow troubleshooting of the display unit.
Touch the menu item you want to troubleshoot, and fol-
low the diagnostic instructions.
RGB Color
This screen verifies that the display unit is receiving the
video (R, G, B and Composite sync) signals properly.
The three primary colors should all be shown without
distortion. The combination of all three should produce
a central white section. If any of the colors are missing,
troubleshoot for the color signal (see page 23-28). If the
picture has lines in it or scrolls horizontally, or vertically,
troubleshoot for a Composite sync problem (see page
23-29).
Gray Tone
This screen diagnoses problems with contrast. You
should be able to see the changes from bar to bar
across the scale. It is normal for the 2 bars on either side
to appear the same.
White Raster
The entire display must be shown in white.