Control System Logic
WARNING: This page is about a different car, the 2023 Ford F-150 Lightning and 2023 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
When the customer directly inputs an A/C request into the HVAC control module, the module sends the request to the GWM over the MS-CAN. The GWM relays the request to the PCM over the HS-CAN1. The PCM controls the A/C clutch control FET in the BCMC.