Honda Odyssey 2018 Owner's Manual page 158

uuLocking and Unlocking the DoorsuLocking/Unlocking the Doors from the Inside
■
Using the Master Door Lock Switch
To Unlock
To Lock
Master Door
Lock Switch
156
Press the master door lock switch in as shown
to lock or unlock all doors and the tailgate.
1Using the Master Door Lock Switch
When you lock/unlock either front door using the
master door lock switch, all the other doors and the
tailgate lock/unlock at the same time.