Acura 2011 RL Owner's Manual page 304

Compass System (U.S. model without navigation system)
Setting Display Mode
Pressing the (
Display
) button allows you to switch
mode
display modes.
Each time you turn the ignition
switch to the ACCESSORY (I)
position, the display mode is in auto.
The screen changes between day
and night modes when you turn the
headlights on and off.
To override the auto mode, select
either day or night mode. This can
be useful if you want to use the
headlights during the day. Be aware
that using day mode at night will
make the screen extremely bright.
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System Initialization
If for any reason, you lose power to
the compass system (the battery was
disconnected), the system needs to
be initialized before you can use it.
Initialization requires this:
Entry of the compass system 4-
digit security code to ''unlock'' the
system.
GPS initialization. This may not be
needed depending on how long the
system was without power.
Entering the Security Code
If the battery goes dead or is
disconnected for any reason, you will
have to enter a security code into
both the audio system and the
compass system before you can use
it again.