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 doorInspection
1. INSPECT POWER WINDOW REGULATOR SWITCH ASSY
(a) Check continuity.
Check the continuity between the terminals when
battery voltage is applied to terminals 1 and 8.
Standard:
If the continuity is not as specified, replace the switch. ...