SW1 L4-1.9L SOHC VIN 8 (1996)
Vacuum Brake Booster: Description and Operation
The vacuum brake booster is a single diaphragm vacuum suspended unit. Engine vacuum is provided to the booster through a hose and a vacuum
check valve. When the brakes are not applied, internal valves within the booster provide vacuum to both sides of the diaphragm. When the brakes are
applied, air at atmospheric pressure is applied to one side of the diaphragm. Since a higher pressure now exists on one side of the diaphragm than the
other, a force is created, assisting the brake application.