The body controller in automotive engineering refers to the electronic control unit (ECU) used to control the body electrical system, and is one of the important components of a car. Common functions include controlling power windows, power rearview mirrors, air conditioning, headlights, turn signals, anti-theft locking system, central locking, defrosting device, etc. The vehicle body controller is connected to other onboard ECUs through a bus to ensure coordinated operation between various systems.