The front brake disc system consists of the following components:
When mechanical force is applied by the driver to the brake pedal, the force is converted into hydraulic pressure by the master cylinder. The hydraulic force is directed to the disc brake calipers and transferred to the brake pads. The brake pads are then forced against the brake friction surfaces by the brake caliper pistons. The friction of the brake pads on the brake disc causes the slowing of wheel rotation and the vehicle.
Ford Focus Key Programming Switch State Control - General Procedures
Special Tool(s)
Vehicle Communication Module (VCM) and Integrated Diagnostic System
(IDS) software with appropriate hardware, or equivalent scan tool
NOTE: The spare key programming switch is a programmable switch which
provides the capability to enable/disable ...