Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2000 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE
Proportioning Valve
WARNING: This page is about a different car, the 2004 Mazda 6 and 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
- Connect 2 pressure gauges and adapters to dual proportioning valve. One to input port and other to output port. Bleed brake system. See BLEEDING BRAKE SYSTEM . Depress brake pedal until pressure gauge reads as specified and check output pressure. See PROPORTIONING VALVE PRESSURE SPECIFICATIONS table.
- Depress brake pedal again, applying additional pressure. Recheck output pressure. If output pressure is not as specified, replace dual proportioning valve.
PROPORTIONING VALVE PRESSURE SPECIFICATIONS
| Application | Inlet Pressure - psi (kg/cm2 ) | Outlet Pressure - psi (kg/cm2 ) |
|---|---|---|
| Master Cylinder Pressure | 355 (25) | 326-384 (23-27) |
| 853 (60) | 461-549 (32.538.5) | |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.