Acura TLX 2021 Owner's Manual page 128

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Locking/Unlocking the Doors Using a Key
If the lock or unlock button of the keyless remote does not work, use the key
instead.
Lock
Unlock
uuLocking and Unlocking the DoorsuLocking/Unlocking the Doors from the Outside
Fully insert the key and turn it.
1Locking/Unlocking the Doors Using a Key
When you lock the driver's door with a key, all the
other doors, fuel fill door and trunk lock at the same
time. When unlocking, the driver's door and fuel fill
door unlock first. Turn the key a second time within a
few seconds to unlock the remaining doors and
trunk.
You can customize the door unlock mode setting.
2 Customized Features P. 300
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