Forenza L4-2.0L (2004)
Vacuum Brake Booster: Description and Operation
Power Booster Description
This booster is a single or tandem diaphragm, vacuum-suspended unit. In a normal operating mode, with the service brakes in the release position, a
vacuum-suspended booster operates with a vacuum on both sides of its diaphragm. When the brakes are applied, air at atmospheric pressure is
admitted to one side of the diaphragm to pro-vice the power assist. When the brakes are released, atmospheric air is shut off from that side of the
diaphragm. The air is then drawn from the booster through the vacuum check valve by the vacuum source.
CAUTION: If any hydraulic component is removed or disconnected, it may be necessary to bleed all or part of the brake system.
