Acura ILX 2018 Owner's Manual page 120

uuLocking and Unlocking the DoorsuLocking/Unlocking the Doors from the Outside
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Locking/Unlocking the Doors Using a Key
If the lock or unlock button of the keyless access remote does not work, use the key
instead.
2 Replacing the Button Battery P. 472
Lock
Unlock
118
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 lock at the same time. When unlocking,
the driver's door unlocks first. Turn the key a second
time within a few seconds to unlock the remaining
doors.
If you unlock the doors with the key, the alarm goes
off when you open the hood or move the shift lever
out of ( P before the power mode is set to ON.
You can customize the door unlock mode setting.
2 Customized Features P. 99, 263