Audi A4

since 1994 release

Manual of the car

Audi A4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
- Brakes
   Independent work on the brake system
   So the brake system works
   Check of brakes
   Brake fluid
   Check of level of brake fluid
   Check of the brake system on tightness and existence of damages
   Replacement of brake fluid
   Disk brakes
   Measurement of thickness of overlays of forward disk brakes
   Check of a condition of brake disks
   Replacement of overlays of disk brakes
   Back disk brakes
   Measurement of overlays of back disk brakes
   Emergency brake
   Check of idling of the lever of the emergency brake
   Main brake cylinder
   Brake amplifier
   Check of the brake amplifier
   Works on hydraulics of the brake system
   Pumping of the brake system
   The help at malfunctions
   ABS and EDS
   What does ABS?
   Function of separate knots
   Electronic system of distribution of brake effort (EBV)
   Violations in work of the ABS system
   Electronic blocking of differential (EDS)
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics


Violations in work of the ABS system

At inclusion of ignition the control bulb of ABS on the control panel flashes. It has to go out when the engine starts working, or the latest at a speed which exceeded 6 km/h. If onboard tension falls lower than 10 V, then the control bulb also lights up. It can light up and in case one of wheels slips longer than 20 pages. Then again switch off ignition and anew start the engine.

If the bulb burns constantly, ABS is not ready for operation. In the workshop Audi or Bosch have to define the reason. As the fan you can check in any case shtekerny sockets of the control unit, sensors of speed or the hydraulic module. Besides, it is possible to recommend to disconnect sensors of speed and to clean their front party.

 Council: Even if the control bulb of ABS burns constantly, i.e. ABS does not work, then you have to conduct the car taking into account idle system of electronic distribution of brake effort. Brakes of back wheels can be blocked relatively early. Extra care is required on turns where at Audi with the blocked back brakes can bring a back part. Carefully driving the car, find the workshop Audi.