Extended Power Module [BECMB]
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The BECMB supplies system voltage to the RCM and OCSM, based on HS-CAN1 inputs and the ignition input.
The BECMB requires PMI when being replaced. Refer to the diagnostic scan tool instructions to carry out PMI.