The above situations are normal conditions when the active eco system is activated to improve fuel efficiency.
Kia Cee'd JD Service Manual: DC DC Converter Description and operation
Description
Due to the considerably more frequent occurrence of starting operations, the
electrical load that occurs often leads to voltage dips in the vehicle network.
In order to stabilize the power supply for certain voltage-sensitive electrical
components, a DC/DC con ...
Kia Cee'd JD Service Manual: Components and components location
Components
1. Front seat belt
2. Height adjuster
3. Rear seat belt
4. Rear center seat belt
5. Rear seat belt buckle [LH]
6. Rear seat belt buckle [RH]
...