Audi A3

since 1997 of release

Repair and car operation

Audi A3
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ the Power supply system and production of the fulfilled gases
+ engine Electric equipment
+ Manual box of gear shifting
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
- Onboard electric equipment
   Electric equipment of system of comfort
   Diagnostics of malfunctions of onboard electric equipment - the general information
   Check of the electric motor of a screen wiper
   Check of warmed back glass
   Stoplight check
   Removal, installation and check of a sound signal
   Safety locks
   Fusible inserts - the general information
   Chain breakers (thermal relays)
   Replacement of batteries of a key of remote control
   Replacement of a battery/lamp of a natural with illumination
   Anticreeping blocking
   Lighting devices
   Replacement of lamps of external lighting
   Replacement of bulbs of internal lighting
   Removal and headlight installation
   Removal and installation of the electric motor of adjustment of range of light
   Removal and installation of the forward index of turn
   Removal and installation of a back lamp
   Adjustment of light of headlights
   Removal and installation of a control panel
   Removal and installation of the podrulevy switch
   Removal and installation of switches and lamps
   Removal, installation and radio receiver coding
   Input of a code of a radio receiver
   Removal and loudspeaker installation
   Removal and installation of the aerial of a roof
   Additional installation of a radio telephone on in a special way prepared models
   Removal and installation of the electric motor of a forward screen wiper
   Removal and installation of the lever and electric motor of a back screen wiper
   Removal and installation of a cleaner of back glass
   Removal and tank installation with the pump of a stekloomyvatel
   Elements темпостата
+ Elektroskhema


Electric equipment of system of comfort


Under electric equipment of system of comfort of the car set of various devices, as that the uniform lock, remote control, adjustment of a mirror of an exterior, electric window regulators, internal lighting, management of the movable panel of a roof, the anticreeping alarm system, and also memory of seats and a mirror means.

The uniform lock is actuated by the electric motor. It consists of one central monitor, two or four door monitors, four blocks of locking of doors, and also engines and switches for locks of a trunk lid or a back door. Other data concerning the uniform lock are given in subsection the Uniform lock – general information and vacuum hoses.

Data exchange between monitors occurs via the so-called CAN tire (on switched lines). CAN is reduction of the words Controlled Area Network and means that monitors are connected with each other in one network. For example, communication of the central monitor with a monitor a door occurs on two wires. Without the CAN tire communication would be carried out by means of 14 cables. Thanks to it the electronic system takes a little place and weighs a little.

Monitors doors form the block together with electric motors of window regulators. The block operates the following functions of electric window regulators:

– Automatic lifting and lowering of door glasses.
– Manual control by lifting and lowering of door glasses when the switch of a door of the driver is pressed.
– The termination of movement of glass as soon as the switch is pressed the second time.
– The windowpane can be operated during 10 mines after ignition switching off.
– Locking of windows by a door key.
– Protection against a jamming in area from 4 to 200 mm below the top window consolidation. If glass at movement up meets an obstacle, for example, with a hand, the mechanism of protection returns glass in former situation. Protection against a jamming consists of the sensor of the Hall located on a payment of a monitor a door and a ring magnet on an axis of the engine. By means of the Hall sensor the monitor a door distinguishes reduction of number of turns of the engine (at obstacle emergence to movement) and changes polarity of tension on the engine, i.e. includes a reverse.


Protection against a jamming can be switched off, if a window regulator, after a glass stop, joins twice during 5 pages.

After loss of power supply of a monitor by a door, for example, owing to shutdown of the storage battery the monitor should remember final provisions of glass again. Otherwise automatic work of a window is impossible, look the subsection Removal and installation of the storage battery.

The monitor a door carries out also functions of management by adjustment of a mirror of an exterior and its heating.

The central monitor is in the block of the dashboard and carries out the following functions:

– Trunk lid locking by the uniform lock.
– Power supply of illumination of a luggage carrier.
– Power supply and automatic switching off on time of internal lighting, illumination of reading and a cosmetics lamp.
– Switching off later 30 with: if the key was taken out from the ignition lock, or the door opened and was again closed.
– Switching off later 10 mines: if ignition was switched off also one or several doors stand the open.
– Switching off 1 hour later: if internal lighting was included manually and ignition is switched off.
– Internal lighting joins automatically on 10 mines if from a monitor a safety cushion the blow signal arrives at failure.
– Anticreeping alarm system.
– Power supply of lobbies and back signals of turn.
– Power supply of warmed back glass.
– Remote control.

Remote control has action radius about 7 m, under favorable conditions to 10 m.

Data transmission from the transmitter on a key to the receiver in the car is displayed optically by means of LED on the key switch. The built-in storage batteries provide about 5 000 pressing.

If by pressing of the LED switch does not light up, it is necessary to replace batteries.

Windows and the movable panel of the hatch of a roof distantly are not closed.

The reception aerial of remote control is in a rack And the car from the driver. A rack And – the first rack of a body against which the door of the driver rests.

The opening/closing team of remote control proves to be true the central monitor by a short-term blinking. If the uniform lock opens by means of remote control and thus the door or a cover a luggage carrier/door of a back do not open, the car is locked automatically again later 30 pages.