Power Brake Unit Function Inspection (Inspection Using Gauges)
WARNING: This page is about a different car, the 2004 Mazda MX-5 Miata, 2003 Mazda MX-5 Miata, and 2002 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
Connect the Pressure Gauges (49-U043-004A), a vacuum gauge, and a pedal depression gauge. See Fig 1 . Bleed the air from the gauges before performing the following tests.