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Home › Mazda › 2003 › B2300 Base, Automatic › Repair and Diagnosis › External Pages › Different car › Section 428 (Conventional Brake System) › Power Brake Unit Inspection › Power Brake Unit Function Check (Simple Method) › Step 2

Step 2

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start the engine.
  2. Stop the engine after it has run for 1 or 2 minutes. 
  3. Depress the pedal with the usual force.
  4. If the first pedal stroke is long and becomes shorter with subsequent strokes, the unit is operating.
    • If a problem is found, inspect for damage of the vacuum hose, and vacuum tank. Repair if necessary, and inspect it again.
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