An electronic control unit for a working voltage not exceeding 1 000 V (so-called "Body Control Module"), designed as a component of the electronic control system of a motor vehicle with dimensions of approximately 16 × 13 × 3 cm, comprising:
- a programmable memory controller with active and passive components, for example, transistors, diodes, a processor, resistors, capacitors and inductors,
- a built-in receiver and an attached antenna.
The unit receives signals from manually operated buttons and from sensors (for example, rain sensors and photo sensors), processes them and on this basis controls various devices in the vehicle, for example, windscreen wipers, window heating, interior lighting, front and rear fog lamps, daytime running lights. It also controls the activation of signalling devices, for example, seatbelt reminder and over speed warning.
It receives signals from the key remote control enabling the vehicle doors to be locked or unlocked.
[1][1]. https://eur-lex.europa.eu/legal-content/en/ALL/?uri=CELEX:32013R0704