Mazda 6 since 2002
	1. Operation and car maintenance
	2. Engine
	3. Transmission
	4. Running gear
	5. Steering mechanism
	6. Brake system
		6.1. General information
		6.2. Brake system
			6.2.1. Check and adjustment of elements of brake system
			6.2.2. Check of level of brake liquid in a tank of a hydraulic actuator of working brake system
			6.2.3. Brake hoses
			6.2.4. Air removal from brake system
			6.2.5. Check of the return valve of a vacuum hose (amplifier of brakes)
			6.2.6. Check of a pedal of a brake
			6.2.7. Removal and installation of a pedal of a brake
			6.2.8. Removal and installation of the main brake cylinder
			6.2.9. Check of the sensor of level of liquid
			6.2.10. Dismantling and assembly of the main cylinder
			6.2.11. Removal and installation of a forward brake disk
			6.2.12. Replacement of forward brake shoes
			6.2.13. Check of lay brake system
			6.2.14. Removal, check and installation of the back sensor of speed of a wheel of ABS
	7. Onboard electric equipment
	8. Body

6-2-5-proverka-obratnogo-klapana-vakuumnogo-shlanga-usilitel-tormozov.html

6.2.5. Check of the return valve of a vacuum hose (amplifier of brakes)

Remove collars and a vacuum hose.

Fig. 6.14. Scheme of check of the return valve

Submit serially vacuum and pressure to a vacuum hose from the engine and be convinced that air can pass only in one party (fig. 6.14).

If air passes in both directions, replace a vacuum hose.