When the interior light switch is in the DOOR position and all doors (and tailgate) are locked and closed, the room lamp will come on for 30 seconds if any of the below is performed.
At this time, if you press the door lock or unlock button, the room lamp will turn off immediately.
Kia Niro 2017 (DE HEV) Service Manual: Sun visor Components and components location
Component Location
1. Sun visor
2. Retainer
...
Kia Niro 2017 (DE HEV) Service Manual: Description and operation
Description
The ECM (Electro Chromatic inside rear view Mirror) is one that automatically
dims to protect the driver’s eyes when it senses light reflecting from the car behind.
The sensor in the mirror detects the brightness and if the headlight from the car
behind is reflected ...