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Home >> Subaru >> 2021 >> Outback Base >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System >> Brake Booster >> Inspection >> Operation Check When Not Using Measuring Devices >> Loaded Air Tightness Check

Loaded Air Tightness Check

Depress the brake pedal while the engine is running, and turn the engine to OFF while the pedal is depressed.

Keep the pedal depressed for 30 seconds. If the pedal height does not change, the function of vacuum booster assembly is normal. If the pedal height increases, it is faulty.

NOTE: If a faulty part is detected after inspection, check precisely with measuring devices.
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