Acura 2011 RL Owner's Manual page 174

Keyless Access System
Keyless Access Remote
This remote is used to lock/unlock
the doors and unlock the trunk.
When you carry the remote, you can
lock/unlock the doors, unlock the
trunk, and start the engine without a
key.
168
You can lock/unlock the doors
within about a 32 inch (about 80 cm)
radius from the outside door handle.
You can open the trunk within about
a 32 inch (about 80 cm) radius from
the trunk release switch.
OPERATING
RANGE
Anyone can lock/unlock a door or
open the trunk if the remote is
within the operating range of the
door or the trunk.
The remote may not work if:
It is too close to the vehicle.
It is above or below the vehicle,
even when it is within its operating
range.