CAUTION:
The radio frequency used by your remote control can also be used by other short distance radio transmissions (e.g. amateur radios, medical equipment, wireless headphones, remote controls and alarm systems). If the frequencies are jammed, you will not be able to use your remote control. You can lock and unlock the doors with the key.
Note: You could unlock the doors if you press the buttons on the remote control unintentionally.
The operating range between your remote control and your vehicle varies depending on the environment.
Ford Focus Principles of Operation
Brake System
Applying the brake pedal uses lever action to push a rod into the brake booster
which, through the use of vacuum, boosts the force of the rod and then transmits
this force into the master cylinder. This produces hydraulic pressure in the master
cylinder. On vehicles not equipped ...