1.Carry the smart key into the vehicle.
2.Make sure the parking brake is firmly applied.
3.Place the shift lever in the P(Park) position.
In N (neutral) position, you can not start the vehicle.
4.Depress the brake pedal.
5.Press the engine start/stop button or turn the ignition switch to the ON position.
6.The engine should be started without pressing the accelerator. In extremely cold weather or after the vehicle has not been operated for several days, let the engine warm up without depressing the accelerator.
If the starting procedure is followed, the "READY" symbol on the instrument cluster will turn on. For more details, Please check chapter 6.
Kia Niro 2017 (DE HEV) Service Manual: Battery Repair procedures
Inspection
Battery Voltage and
Status
Check the battery voltage and status using the battery tester.
Battery Terminal
1.
Move back and forth to check that the battery terminals (A) are loose
or corroded.If the terminals are corroded, clean them.
...
Kia Niro 2017 (DE HEV) Service Manual: Roof Trim Assembly Components and components location
Component Location
1. Roof Trim Assembly
...