Acura 2011 TL Owner's Manual page 198

Built-in key and Remote
The built-in key can be used to lock/
unlock the doors and the trunk when
the remote battery becomes weak
and the power door lock/unlock
operation is disabled.
BUILT-IN KEY
RELEASE BUTTON
To remove the built-in key, pull it out
while pressing the release button. To
reinstall the built-in key, push the
key into the remote until it clicks.
To avoid damaging the remote and
the built-in key, never pull on the
built-in key unless you are pressing
the release button.
The keyless access system uses an
electric field to identify the remote.
If you use medical equipment such
as a cardiac pacemaker, ask your
doctor if the electric field used by
the remote will affect it.
2011 TL
Keyless Access System
Valet Function
The trunk and glove box cannot be
opened when you turn the trunk
main switch off and lock the glove
box and trunk pass-through cover
with the built-in key. Then, the trunk
cannot be opened by using the
remote or the exterior trunk release
switch.
Remove the built-in key from the
remote by pressing the button, then
give that remote to someone else as
a valet key.
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