Instrument Panel Cluster (IPC) - System Operation and Component Description: Mil
WARNING: This page is about a different car, the 2015 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The IPC receives the MIL request from the GWM over the High Speed Controller Area Network 3 (HS3-CAN). The GWM receives the MIL request from the PCM over the High Speed Controller Area Network 1 (HS1-CAN).