Acura 2009 TL Owner's Manual page 176

Keyless Access System
If you do not open any of the doors
within 30 seconds, they will
automatically relock.
To change the ''SECURITY
RELOCK TIMER'' setting, see page
127 .
If a remote is within operating range
while you wash your vehicle or when
it is raining heavily, the door sensors
may respond by unlocking the doors.
170
Each unlock sensor does not operate
when:
The remote is not within the
operating range.
The remote is too close to the
vehicle.
When the doors are unlocked.
The remote battery is dead.
The vehicle battery is dead.
Locking the Doors
DOOR LOCK SENSOR BUTTON
When you press the door lock sensor
button on the front door, all the
doors and the trunk will lock.
Before locking the doors, make sure
the remote is not inside the vehicle.