REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mazda 3 (2003 release)

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Mazda
	3
		Operation and maintenance of car
		Engine
			General description new engines models L8, LF, L3
				The mechanical part of engines
				Variable valve timing mechanism
				Lubrication system
				Cooling system
				Fuel system
					Overview
					Intake system
					The main features of the duct with varying characteristics (VAD) (L3)
					The actuator system (VAD) (L3)
					Solenoid valve system (VAD) (L3)
					The check valve system (VAD) (L3)
					The fuel assembly
					The fuel pump unit
				Exhaust and Emission
				Electric motors
			The mechanical part of engines
			Appendix 1
			Annex 2
			Appendix 3
			Engine Z6 - mechanical part
			Lubrication system
			Cooling system
			Intake system
			Fuel system
			Exhaust and Emission
			Ignition system
			Control system
			Tables
		Transmission
		Chassis
		Steering Gear
		Brakes
		Onboard electric
		Body

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The main features of the duct with varying characteristics (VAD) (L3)

Fig. 2.57. VAD system car Mazda 3 with an engine L3: 1 - damper system VAD; 2 - the control solenoid valve VAD; 3 - vacuum chamber system VAD; 4 - check valve VAD system

VAD control system opens the shutter in the housing of the air filter at high engine speeds to increase the air flow. The system consists of flaps, solenoid valve, a vacuum chamber and a check valve. Normally, under the influence of the spring rod opens the damper (Fig. 2.57).

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Intake system

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The actuator system (VAD) (L3)