Component Description: GSM
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The GSM has Hall-effect sensors that are used as inputs to indicate the lever has been moved. When P is selected above 5 mph (8 km/h) N is provided along with a message in the IPC. The Brake Transmission Shift Interlock (BTSI) CAN signal is used for normal function to shift from P.