What Does a Body Control Module Do in a Car?

What Does a Body Control Module Do in a Car?

A body control module monitors, regulates and controls the functioning of different electronic components in a car. This electronically operating control unit leverages the operation of the car's power windows and mirrors, air conditioner, automatic door locking mechanism, immobilizer system and lamp dimming mechanism. It is also responsible for tracking the vehicle's mileage and output of carbon dioxide.

The body control module brings individual modules for various electric devices in a vehicle under a single system. This allows the different devices to operate together instead of individually, which in turn makes troubleshooting the devices easier.

When troubleshooting, the body control module indicates relevant codes that point to those electric component modules that are dysfunctional. Sometimes, the body control module diagnoses and reports specific car problems automatically.

To regulate the operation of various devices in the car, the body control module communicates with other computers in the vehicle. Its primary application is to control the actuating relays or load drivers that are responsible for performing different actions in the car, including automatic door locking and reducing illumination of the overhead lamp. The unit also digitally tracks device modules that use timers and the anti-theft alarm.

This unit is similar to a computer in function in that it can store data, send and receive radio signals, and use RAM.