The back door can be locked/unlocked and opened/closed by the following procedures.
Automatic door locking and unlocking systems
Locking and unlocking the back doorFolding down the third seats
Before folding down the third seats
Stow the third seat belt buckles.
Pass the outer seat belts
through the seat belt hangers
and secure the seat belt
plates.
This prevents the shoulder belts
from being damaged.
Make sure that the seat belts
are removed from the hangers
...