If you are within 0.7 ~ 1m (28 ~ 39.3 in) from the outside tailgate handle, with your smart key in possession, the tailgate will unlock and open when you press the tailgate handle switch.
The hazard warning lights will blink twice to indicate that the tailgate is unlocked.
Also, once the tailgate is opened and then closed, the tailgate will lock automatically.
Kia Niro 2017 (DE HEV) Service Manual: Components and components location
Components Location
1. Front axle
2. Stabilizer bar
3. Gear box
4. Drive shaft
5. Subframe
6. Stabilizer link
7. Front lower arm
...
Kia Niro 2017 (DE HEV) Service Manual: Relay Box (Engine Compartment) Repair procedures
Inspection
1.
Disconnect the negative (-) battery terminal.
2.
Pull out the relay from the engine compartment relay block.
Power Relay (Type A)
Check for continuity between the terminals.
1.
After supplying power to ...