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Home >> Subaru >> 2019 >> Crosstrek Base, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 54 (Brake System) >> Brake Booster >> Inspection >> Operation Check When Not Using Measuring Devices >> Check Operation

Check Operation

WARNING: This page is about a different car, the 2019 Subaru Ascent. However, it is still accessible from the selected car via links, so may be relevant.
  1. While the engine is OFF, depress the brake pedal several times applying the same pedal force, to check for a change in pedal height.
    G13199775Courtesy of SUBARU OF AMERICA, INC.
  2. With the brake pedal depressed, start the engine.
  3. As the engine starts, the brake pedal should move slowly toward the floor. If the pedal height does not change, the vacuum booster assembly is faulty.
    NOTE: If a faulty part is detected after inspection, check precisely with measuring devices.
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