If the back door opener does not operate, there may be a problem with the back door opener system. Have the vehicle inspected by your Toyota dealer immediately.
The following steps may be used as an emergency measure to ensure that the back door can be opened from the inside.

Remove the cover on the back door trim.

Tear the plastic film. Remove the cover.

Pull the lever.
If you lose your keys
If the electronic key does not operate properly (vehicles with a smart key
system)Acceleration Sensor Circuit Malfunction (C1887/87)
DESCRIPTION
The stabilizer control ECU receives forward, backward and lateral acceleration
information from the yaw rate and acceleration sensor via CAN communication.
DTC Code
DTC Detection Condition
Trouble Area
...
Inspection
INSPECTION
PROCEDURE
1. INSPECT MAGNET CLUTCH ASSEMBLY
(a) Check the magnet clutch operation.
(1) Confirm that the magnet clutch hub and magnet clutch rotor lock when the
positive (+) lead of the battery is connected to terminal 3 of the magnet clutch, ...