Audi A4

since 1994 of release

Repair and car operation

A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and absorption channels
+ injection System
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ ignition System
+ Lighting
+ Alarm equipment
- Tools and devices
   Check of control tools and bulbs
   The combined device
   Indicator of amount of fuel
   The indicator of temperature of cooling liquid
   Auxiliary devices
   Control bulbs above in the combined device
   Control bulb of cooling liquid
   Control bulb of level of brake liquid
   Control bulb of pressure of oil
   Control bulb of indexes of turns
   Control bulbs in devices of a round form (and nearby)
   Control bulb of indexes of turn on the trailer
   Control bulb of ASR
   Control bulb of the lock of ignition
   Control bulb of headlights of a driving beam
   Control bulb of a safety cushion
   Control bulb of ABS
   Control bulb of the parking brake
   Control bulb of a battery charging
   System of autocontrol of the car
   Ignition lock
   Check of switches
   Alarm buzzer of lighting
   Warmed back glass
   Check of screen wipers and stekloomyvatel
   Engine of screen wipers
   The help at malfunctions
   The liquid gulf for washing of glasses
   System of washing of headlights
   Mirror adjustment with the electric drive
   Central lock
   Window regulators 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 autocontrol of the car

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

At special desire on Audi A4 the so-called system of automatic control of the car is put. This system supervises eight functions and working conditions after inclusion of ignition and dimensional lamps or stoplight fires. And also carries out control during movement. Thanks to it the system of autocontrol of the car replaces with itself a 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 brake liquid. Pressure of oil of the engine: pressure of oil in the engine the too low. Measuring methods, as at traditional control of pressure of oil (it is described above). Cooling liquid: the temperature of cooling liquid is higher than 120 °C, or the working temperature, or level of cooling liquid the too low is not reached. Precautionary indication of yellow color appears in a light field in a combination to a single sound signal. It: Stoplight fires: this symbol appears right after ignition inclusion. When the brake pedal is pressed, the symbol dies away – provided that both fires of a stoplight function. Lighting: the monitoring system cannot carry out this check in an automatic mode. For control the driver should include headlights of a passing beam previously. Headlights of a passing beam and back lamps are at the same time checked. The system owing to the design cannot show simultaneous failure of both filament lamps of headlights of a passing beam or back lamps. Though it is improbable defect. Accumulator: the symbol of the accumulator lights up in case tension of the accumulator is not in limits nominal sizes from 10,6 to 15,6 Century. System of washing of glasses: this indication indicates too low level of liquid in a tank for washing of glasses. Fuel tank: the symbol of petrol filling station flashes in case 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 "OK" should appear when after inclusion of ignition and after pressing a pedal of a brake «Bremslicht» inscription – «stoplight fires» dies away. "OK" means that all points are checked without receiving a signal about defect existence. Through short time the light symbol disappears.

How check is carried out?

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

Absolutely positions of control of illumination of the car in a different way function. These «devices of control of bulbs» work at an electromagnetic basis and compare a current stream in wires, for example, to right and to left to headlights of a passing beam. 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 control unit. Certainly, distinction is absent and in case the extremely exceptional case when both lamps are faulty meets really. Against it the control device is powerless.

 Council: At socket connection for the coupling of the trailer established subsequently it is necessary to take into consideration that wires to back lamps already have branch from the device of 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 lamps, at included illumination of the trailer there are different currents in the device of control of lamps, and he reports about «defect of a lamp».

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

Search of malfunctions in the car monitoring system


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

Self-checking of the display module


    At the included ignition and the standing car (or moving for the speed Max. 5 km/h) press the button at the left below on the combined device. All display symbols, if the indicator and system as it should be are serially interrogated. Poll is impossible, if there is a danger indication.

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

Prevention of speed: after storing of speed of movement at present the monitoring system of the car reports by emergence 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 existing information (to hold pressed the button at the left about 1 page) is erased. Storing of two speeds is possible.

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

Instructions to the driver: at a blinking of the precautionary indicator it is possible to receive from the instruction display what to do at present. Press for this purpose the button at the left below near 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 «follows, for example, to Motor abstellen, olstand prufen» – «Switch off the engine, check oil level».