Kia Niro 2017 (DE HEV) Service Manual: Engine Control Module (ECM) Repair procedures
Removal
1.
Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
2.
Disconnect the TCM connectors (A).
3.
Disconnect the ECM connectors (B).
4.
Remove ...
Kia Niro 2017 (DE HEV) Service Manual: Coolant Repair procedures
Refilling And Bleeding
Never remove the cap when the engine is hot. Serious scalding could be
caused by hot fluid under high pressure escaping from the reservoir.
  ...