Whenever a front door is opened, the ignition switch will be illuminated for your convenience, provided the ignition switch is not in the ON position. The light will go off immediately when the ignition switch is turned on or go off after about 30 seconds when the door is closed.
Kia Niro 2017 (DE HEV) Service Manual: A/C Pressure Transducer Repair procedures
Inspection
1.
Measure the pressure of high pressure line by measuring voltage output
between terminals "1" and “2”.
2.
Check if the voltage is within specification.
Voltage = 0.00878835 * Pressure + ...
Kia Niro 2017 (DE HEV) Service Manual: Front Door Trim Components and components location
Component Location
1. Front door trim
...