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.
2018 Ford Focus S, Automatic DCT TransFACTORY OEM SERVICE PROCEDURE
Module Controlled Functions: Overview
WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
The BCM controls the following:
- Battery saver function
- Brake shift interlock
- Delayed accessory function
- Dimmable backlighting
- Exterior lighting
- Horn
- Ignition state messaging
- Interior lighting
- Keyless entry keypad (without Push button start)
- Liftgate release (without Push button start)
- PATS (vehicles without Push button start)
- Perimeter alarm
- Power door locks (vehicles without Push button start)
- Post crash alert function
- RKE system (without Push button start)
- Remote start
- Third row power-fold seat
- TPMS
The RFA (With Push button start only) controls the following:
- Push button start function
- Key validation (part of the PATS)
- Keyless entry keypad
- Liftgate release
- PATS
- Power door locks
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.