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Home >> Mazda >> 2021 >> CX-30 Turbo Premium >> Repair and Diagnosis >> External Pages >> Different car >> Section 97 (Conventional Brake System) >> Power Brake Unit Inspection (Us) >> Using SST >> Vacuum loss inspection

Vacuum loss inspection

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start the engine.
  2. Depress the brake pedal with a force of 200 N {20.4 kgf, 45.0 lbf}.
  3. Stop the engine when the vacuum gauge reading reaches 68 kPa {510 mmHg, 20 inHg} with the brake pedal depressed.
  4. With the engine off, observe the vacuum gauge for 15 s.
  5. If the gauge has dropped 3.3 kPa {25 mmHg, 0.97 inHg} or less, the unit is normal.