A control module is a small device that helps manage or govern the operation of something. It is like a mini-computer that gives instructions and oversees the functions of a larger system or machine. Full definition
The symptoms you are experiencing are similar to when a powertrain control module fails. (yourmechanic.com)
That means lithium - ion battery packs, electric motors, hardware such as wiring, and even software such as engine control modules. (digitaltrends.com)
In the affected vehicles, the electronic control module for the driver and front passenger seat heaters may fail, preventing the seat heaters from being able to be turned off. (cars.com)