To activate an one-touch lane change function, move the turn signal lever slightly for less than 0.7 second and then release it. The lane change signals will blink 3 times.
✽ NOTICE
If an indicator flash is abnormally quick or slow, a bulb may be burned out or have a poor electrical connection in the circuit.
Kia Niro 2017 (DE HEV) Service Manual: Input Speed Sensor Components and components location
Component Location
1. Input speed sensor
...
Kia Niro 2017 (DE HEV) Service Manual: Lane Departure Warning System (LDWS) Unit Repair procedures
Removal
When replacing the LDWS switch, check that the symbol mark in the cluster
operates normally by pressing the ON/OFF switch.
1.
Disconnect the negative (-) battery terminal. ...