1. Check the child lock: Make sure the child lock is not engaged on the rear doors. If it is, disengage it and try unlocking the doors again.
2. Check the door lock actuators: The door lock actuators are responsible for locking and unlocking the doors. If one or more of the actuators are faulty, it can prevent the doors from unlocking from the inside. To check the actuators, you can try manually locking and unlocking the doors with the key. If the doors lock and unlock smoothly with the key, then the actuators are likely working properly.
3. Check the door lock switch: The door lock switch is located on the inside of the door panel. If the switch is faulty, it can prevent the doors from unlocking from the inside. To check the switch, you can try pressing it multiple times and see if the doors unlock. If the doors unlock sometimes but not others, then the switch may be faulty and need to be replaced.
4. Check the wiring: The door lock actuators and switches are connected to the vehicle's wiring harness. If there is a problem with the wiring, it can prevent the doors from unlocking from the inside. To check the wiring, you can visually inspect the wiring harness for any damage or loose connections. If you find any damage, you can repair it or replace the wiring harness as needed.
5. Have the vehicle diagnosed by a professional: If you are unable to fix the problem yourself, you can have the vehicle diagnosed by a professional mechanic. The mechanic will be able to identify the exact cause of the problem and recommend the best course of action.
