Brake Pedal Position (BPP) Switch
WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
The brake pedal position (BPP) switch signals the PCM when the brakes are applied. The BPP switch is closed when the brakes are depressed and open when they are released. The BPP switch will also disengage TCC when brake is applied.