Service of Audi A4 from 2001 to 2005 release.
1. Operation and maintenance of the car
1.1. General information
1.2. Keys, locks of doors
1.3. Governing bodies, combination of devices and equipment of interior of the car
1.4. Seats and means of passive safety
1.5. Conditioning and heating
1.6. Driving and service of the car
1.6.1. Launch of the engine
1.6.2. Emergency brake
1.6.3. The help at the parking ahead and behind
1.6.4. System of regulation of speed
1.6.5. Automatic transmission
1.6.6. Klinotsepna variator of "Multitronic"
1.6.7. Operation of "Multitronic"
1.6.8. Electronic system of dynamic stabilization (ESP)
1.6.9. Antiblocking device brake systems
1.6.10. Electronic blocking of differential (EDS)
1.6.11. System of regulation of the drive of driving wheels (ASR)
1.6.12. Amplifier of the steering drive
1.6.13. System servotronik
1.6.14. Four-wheel drive ("Quattro")
1.6.15. The movement with the trailer
1.6.16. Removable traction coupling device
1.6.17. Control of level of oil
1.6.18. Cooling liquid
1.6.19. Rechargeable battery
1.6.20. Windscreen washer
1.6.21. Replacement of a wheel
1.6.22. Lifting of the car
1.6.23. Dismantle / installation of a wheel
1.6.24. Help of launch of the engine
1.6.25. Safety locks
1.6.26. Glow lamps
2. Engine
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
7. Onboard electric equipment
8. Body
9. Schemes of electric equipment
 




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1.6.9. Antiblocking device brake systems

ABS prevents blocking of wheels when braking.
The antiblocking device of the brake system (ABS) considerably promotes increase in active safety of the car. Decisive advantage of the brake system with ABS in comparison with usual is that wheels are not blocked even at the emergency tormo of a zheniya on the slippery road. Thanks to it in the maximum degree controllability and stability of the car remains.

Principle of action of ABS
At achievement of speed of the car about 6 km/h there is an automatic process of control. At this time it it is possible to hear noise of operation of the pump.
At tendency of a wheel to blocking pressure in the brake drive of this wheel decreases. This process of regulation is noticeable by a pulsation of a brake pedal and is followed by characteristic noise manifestations. Thereby to the driver the warning signal of work of one or several wheels in the mode close to a skid is specially given. For providing by means of ABS hold a pedal of a brake in this mode of optimum effect of regulation pressed and you do not brake in several musclemen at all.

Amplifier of emergency brake application
The amplifier of emergency brake application promotes increase in brake force.
The amplifier of emergency brake application helps increase in brake force and thus promotes reduction of a brake way. By very bystry pressing of a pedal of a brake the amplifier of emergency brake application automatically brings brake force to a maximum, up to intervention of the antiblocking device of the brake system (ABS). Hold a pedal of a brake pressed before obtaining desirable effect of braking. Right after a pedal otpuskaniye the amplifier of emergency brake application is automatically switched-off.
In case of refusal the antiblocking device of the brake system (ABS) the amplifier of emergency brake application does not work.


1.6.8. Electronic system of dynamic stabilization (ESP)

1.6.10. Electronic blocking of differential (EDS)