Honda Odyssey 2018 Owner's Manual page 180

uuOpening and Closing the Sliding DoorsuAuto-Closer
Auto-Closer *
If you manually close the power sliding door, it latches automatically.
The auto-closer feature activates with or without the main switch ON.
* Not available on all models
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1Auto-Closer
Keep your hands away from the power sliding door.
The manually closed door latches automatically when
it is half-shut.
The auto-closer feature does not activate if you keep
pulling the inner or outer handle while the sliding
door is closing.
Do not put any force on the power sliding door while
the door is latching.