If the high mounted stop lamp (LED) does not operate, we recommend that you checked an authorized Kia dealer.
Kia Niro 2017 (DE HEV) Service Manual: Front Rear Parking Assist System Switch Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the console upper cover.
(Refer to Body - "Floor Console Assembly")
3.
Disconnect the console upper cover switch connector (A).
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Kia Niro 2017 (DE HEV) Service Manual: Repair procedures
Service Point Target Auto
Calibration (SPTAC)
This procedure provides a way to calibrate the camera by having the service technician
align the car to a well lit simulated straight road target; preferably wall mounted.
The LDWS camera will have a "System Out of Calibration& ...