The battery sensor is deactivated, when the battery is disconnected from the negative pole for maintenance purpose.
In this case, the ISG system is limitedly operated due to the battery sensor deactivation. Thus, the driver needs to take the following procedures to reactivate the battery sensor after disconnecting the battery.
Hyundai Kona (OS) 2018-2025 Service Manual: Rear Seat Belt Retractor Repair procedures
Replacement
•
When installing the belt, make sure not to damage the retractor.
1.
Remove the luggage side trim.
(Refer to Inter ...
Hyundai Kona (OS) 2018-2025 Service Manual: Parking Brake Lever Repair procedures
Removal
1.
Turn ignition switch OFF and disconnect the battery negative (-) cable.
2.
Release the parking brake.
3.
Remove the floor console assembly.
(Refer to Body - "Floor Console")
...