Audi A4

Since 1994 of release

Repair and car operation

Audi А4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ Exhaust system
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and channels всасывания
+ Injection system
+ Coupling
+ Transmission and the main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tyres
+ The electrotechnical equipment
+ Ignition system
+ Illumination
+ The alarm equipment
- Tools and devices
   Check of control tools and bulbs
   The combined device
   The indicator of quantity of fuel
   The indicator of temperature of a cooling liquid
   Auxiliary devices
   Control bulbs above in the combined device
   Control bulb of a cooling liquid
   Control bulb of level of a brake liquid
   Control bulb of pressure of oil
   Control bulb of indexes of turns
   Control bulbs in devices of the round form (and nearby)
   Control bulb of indexes of turn on the trailer
   Control bulb ASR
   Control bulb of the lock of ignition
   Control bulb of headlights of a headlight
   Control bulb of a pillow of safety
   Control bulb ABS
   Control bulb of a lay brake
   Control bulb of gymnastics of the accumulator
   System of the autocontrol of the car
   The ignition lock
   Check of switches
   Alarm buzzer of illumination
   Cigar Lighter
   Warmed back glass
   Check of screen wipers and windscreen
   The engine of screen wipers
   The help at malfunctions
   Gulf of a liquid for washing of glasses
   System of washing of headlights
   Adjustment of a mirror with the electric drive
   The central lock
   window raiser with the electric drive
   Sliding/demountable roof with the electric drive
   Radio receiver
   The aerial on back glass
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics

System of the autocontrol of the car

The probe (2) indicators of external temperature is on an arm before a radiator (1).

At special desire on Audi А4 the so-called system of the automatic control of the car is put. This system supervises eight functions and working conditions after inclusion of ignition and dimensional lanterns or stoplight fires. And also carries out the control during movement. Thanks to it the system of the autocontrol of the car replaces with itself certain quantity of the traditional control bulbs which are available at a standard complete set.

The indicator of the malfunctions, which light field is in the middle of the combined device, is divided into groups danger indication and precautionary indication.

Defects which reduce level of safety of the car or can lead to damages, are considered as indication of danger and light up red light in a display field. In addition the sound signal of the combined device three times sounds. It:

  • Brake system: too low level of a brake liquid.
  • Pressure of oil of the engine: pressure of oil in the engine too low. Measuring methods, as at the traditional control of pressure of oil (it is described above).
  • Cooling liquid: the temperature of a cooling liquid above 120 С, or is not reached working temperature, or level of a cooling liquid too low.
  • Precautionary indication of yellow colour appears in a light field in a combination to a single sound signal. It:
  • Stoplight fires: this symbol appears right after ignition inclusions. When the brake pedal the symbol dies away is pressed – provided that both fires of a stoplight function.
  • Illumination: the monitoring system cannot spend this check in an automatic mode. For the control the driver should include passing light headlights preliminary. Headlights of a passing light and back lanterns are simultaneously checked. накаливания headlights of a passing light or back lanterns the system owing to the design cannot show simultaneous failure of both lamps. Though it is improbable defect.
  • The accumulator: the accumulator symbol lights up in the event that pressure of the accumulator is not in limits nominal sizes from 10,6 to 15,6 Century
  • System of washing of glasses: this indication specifies in too low level of a liquid in a tank for washing of glasses.
  • Fuel tank: the symbol of petrol filling station flashes in the event that in a fuel tank there were 12 l of gasoline. If in the field of precautionary indication there are some defects symbols light up serially while ignition is included.
  • Indication ОК should appear when after inclusion of ignition and after pressing a brake pedal the inscription Bremslicht – stoplight fires dies away. ОК means that all points are checked up without signal reception about defect presence. Through short time the light symbol disappears.

How check is carried out?

For carrying out of the work the car monitoring system receives in the beginning the information on an operational condition of the engine. This information arrives from the block of management of ignition/injection (the information on number of turns of the engine), from the plug 50 starters (the engine is started) and from the plug 61 generators (the engine works).

Absolutely in another way positions of the control of illumination of the car function. These devices of the control of bulbs work on an electromagnetic basis and compare a current stream in wires, for example, to right and to left to passing light headlights. If as a result of malfunction in one wire or defect of a lamp in general is not present a current the control device establishes distinction and sends a signal to the management block. Certainly, distinction is absent and in the event that there is really extremely a rare occurence when both lamps are faulty. Against it the control device is powerless.

 Council: At connection of the socket for the coupling of the trailer established subsequently it is necessary to take into consideration that wires to back lanterns already have tap from the device of the control of lamps (it is in a 13-seater support of the relay in nests 4 and 5). If the current for the socket undertakes from one of back lanterns at the included illumination of the trailer there are different currents in the device of the control of lamps, and he informs on defect of a lamp.

Check of the monitoring system of the car by own forces is possible only partially: in the beginning all gauges if there defect has not been found, a cause of defect in the monitoring system of the car are checked.

Search of malfunctions in the car monitoring system


  1. Gauges are checked in the same way, as well as at control bulbs in a traditional control panel.
  2. The gauge of level of a liquid which is established only in the car monitoring system, is checked as follows: if despite the filled tank with a liquid for washing of glasses the control bulb burns, disconnect a wire socket on the water pump. If now the alarm bulb dies away, the gauge in the water pump is faulty.
  3. Check of the combined device of the control of lamps ahead and behind (assembly position: a 13-seater support of the relay, 4 and 5) you should give nests to a workshop.
  4. The car monitoring system is a constructive element of the combined device equipped thus. At defect it is necessary to replace with its new device. Other possibility: workshops in certain cases can help.

Self-checking of the display module


  1. At the included ignition and the standing car (or moving for the speed макс. 5 km/h) press the button at the left below on the combined device.
  2. All display symbols if the indicator and system is perfectly in order are serially interrogated.
  3. Interrogation is impossible, if there is a danger indication.

Additional functions on a display field of the monitoring system of the car

The prevention of speed: after storing of speed of movement at present the car monitoring system informs by occurrence of a symbol and a sound signal if this speed is essentially exceeded. This information remains in memory until ignition if in memory other speed is not put will be switched off or the existing information is erased (to hold pressed the button at the left nearby 1 with.). Storing of two speeds is possible.

The radio frequency indicator: if the display field is not occupied by the information arriving from the monitoring system of the car on it the established radio frequency is shown at corresponding equipment of radio receiver Audi. In addition display field informs on stereoreception or the put audiocassette (path). In the presence of radio stations with signals of system of the radio data on the indicator appears RDS.

Instructions to the driver: at a blinking of the precautionary indicator it is possible to receive from the display of the instruction what to do at present. Press for this purpose the button at the left below near to the display of the monitoring system of the car then there is a written message: after a signal about insufficient level of oil the text Motor abstellen follows, for example, olstand prufen – Switch off the engine, check up oil level.