HSWM (vehicles not equipped with adaptive steering)
WARNING: This page is about a different car, the 2022 Lincoln Nautilus. However, it is still accessible from the selected car via links, so may be relevant.
The HSWM controls the steering wheel heating elements. The HSWM uses the steering wheel temperature sensor to maintain the steering wheel temperature. The HSWM supplies voltage and ground to the heating elements integral to the steering wheel and maintains the temperature based on the steering wheel temperature sensor reading until the heated steering wheel is switched off on the FDIM or the ignition is turned off.
The HSWM requires PMI when replaced.