Brake Booster
WARNING: This page is about a different car, the 2003 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
The brake booster is a dual diaphragm, vacuum assisted power brake booster. The brake booster will not operate if vacuum is restricted or if any of the vacuum related power brake components fail.
The master cylinder attached to the booster carries out the same functions as master cylinders found on non-booster brake systems. It differs in that there is one pressure transducer that is installed in spare outlet port at the primary circuit. The pressure transducer is a diaphragm type unit. When a pressure is seen the diaphragm is stretched, causing a voltage to be output. As the pressure increases or decreases, the voltage also increases or decreases with it.