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 provides system voltage to the RCM and OCSM when the ignition is ON. Additionally, the BECMB is designed to ensure that the RCM and OCSM remain powered on if the ignition is turned off while the vehicle is moving at a speed greater than 4 km/h (2.5 mph).

If the ignition is turned off while the vehicle is travelling at a speed above 4 km/h (2.5 mph), the BECMB maintains system voltage on the RCM and OCSM power supply circuits. Once the vehicle speed drops below the threshold while the ignition is off, the BECMB powers down the RCM and OCSM. If the vehicle speed rises above the threshold again, the BECMB does not reactivate the power supply to the RCM and OCSM. They remain off until the ignition is turned on again.

If a vehicle is parked, with the ignition off, the BECMB does not provide power to the RCM and OCSM. If the vehicle begins to move, while the ignition is still off, the BECMB does not power the RCM or OCSM.

When the vehicle has been started using the remote start feature (if equipped), the ignition status is off, but the BECMB powers the RCM in order to detect a collision and disable the fuel pump, if necessary.