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Brake Booster: Notes

WARNING: This page is about a different car, the 2002 Subaru Forester and 2001 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: When checking operation, securely apply the hand brake.
NOTE: Testing without gauges cannot determine the exact portion which has failed, but it can provide a rough understanding of the nature of the failure if checking is conducted in accordance with the following procedures.
NOTE: When testing with gauges, connect gauges as shown. See Fig 1 . After bleeding air from pressure gauges, proceed to each check.
Fig 1: Identifying Brake Booster Gauges
G00275789Courtesy of SUBARU OF AMERICA, INC.