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Home >> Mazda >> 2007 >> B3000 Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 522 (Conventional Brake System) >> Power Brake Unit Inspection >> Power Brake Unit Function Inspection (Simple Method) >> Step 3
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Step 3

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start the engine.
  2. Depress the pedal with the usual force.
  3. Stop the engine with the pedal held depressed.
  4. Hold the pedal down for about 30 seconds  .
    • If the pedal height does not change, the unit is operating.
    • If there is a problem, inspect for damage or improper connection of the check valve or vacuum hose. Repair if necessary and inspect it once again.
    • If the nature of the problem is still not clear after following the 3 steps above, follow the more detailed inspect described in INSPECTION USING GAUGES .