Acura 2014 TL Owner's Manual page 256

Playing the XM Radio (Models without navigation system)
'' - - - - '' The selected channel
number does not exist, or is not part
of your subscription, or this channel
has no artist or title information at
this time.
''NO INFO'' The selected
channel has no artist or title
information at this time.
''ANTENNA'' There is a problem
with the XM antenna. Please consult
your dealer.
250
The XM satellites are in orbit over
the equator; therefore, objects south
of the vehicle may cause satellite
reception interruptions. To help
compensate for this, ground-based
repeaters are placed in major
metropolitan areas.
Satellite signals are more likely to be
blocked by tall buildings and
mountains the farther north you
travel from the equator. Carrying
large items on a roof rack can also
block the signal.
Depending on where you drive, you
may experience reception problems.
Interference can be caused by any of
these conditions:
Driving on the north side of an
east/west mountain road.
Driving on the north side of a
large commercial truck on an
east/west road.
Driving in tunnels.
Driving on a road beside a vertical
wall, steep cliff, or hill to the south
of you.
Driving on the lower level of a
multi-tiered road.
Driving on a single lane road
alongside dense trees taller than
50 ft. (15 m) to the south of you.