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.
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HOMESERVICE MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 514 (CONVENTIONAL BRAKE SYSTEM)POWER BRAKE UNIT INSPECTIONPOWER BRAKE UNIT FUNCTION INSPECTION (INSPECTION USING GAUGES)CHECKING FOR VACUUM LOSS (LOADED CONDITION)
2010 Mazda 5 Sport, 2.3 L, Standard
Checking for vacuum loss (loaded condition)
2010 Mazda 5 Sport, 2.3 L, StandardSECTION Checking for vacuum loss (loaded condition)
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.
- Start the engine.
- Depress the brake pedal with a force of 196 N {20 kgf, 44 lbf} .
- With the brake pedal held depressed, stop the engine when the vacuum gauge indicates 66.7 kPa {500 mmHg, 19.7 inHg} .
- Observe the vacuum gauge for 15 seconds
.
- If the gauge indicates 63.4-66.6 kPa {475-500 mmHg, 18.8-19.6 inHg} , the unit is operating.
RENDER: 1.0x
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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.