Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2021EXPEDITION PLATINUM, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 302 (MULTIFUNCTION ELECTRONIC MODULES)DESCRIPTION AND OPERATIONMODULE CONTROLLED FUNCTIONS - OVERVIEW
2021 Ford Expedition Platinum, RWD
Module Controlled Functions - Overview
2021 Ford Expedition Platinum, RWDSECTION Module Controlled Functions - Overview
WARNING: This page is about a different car, the 2019 Lincoln Nautilus. However, it is still accessible from the selected car via links, so may be relevant.
Body Control Module (BCM)
The BCM controls the following:
- Battery load shed function
- Battery saver function
- Brake shift interlock
- Delayed accessory function
- Dimmable backlighting
- Exterior lighting
- Heated rear windows
- Heated exterior mirrors
- Horn
- Ignition state messaging
- Interior lighting
- Keyless entry keypad
- PATS
- Perimeter alarm
- Post crash alert function
- Power door locks
- Push-button start function
- RKE system
- Remote start function (if equipped)
- TPMS
- Transport mode function
- Wipers and washers
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.