Audi A4, S4

Since 2000 of release

Repair and car operation

Audi A4, S4
+ Introduction
+ Controls and receptions of safe operation
+ Current leaving and service
+ The engine
+ Systems of cooling, heating and the air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of an electric equipment of the engine
+ Manual box of a gear change
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
- Onboard electric equipment
   Diagnostics of malfunctions of an onboard electric equipment - the general information
   Рассоединение sockets
   Check of the electric motor of a screen wiper
   Check of warmed back glass
   Check of stoplights
   Removal and installation of a sound signal
   Removal and installation of gauges of a parking
   Replacement of the battery of a remote control of the ignition key
   The relay and safety locks
   Replacement of lamps накаливания devices of external illumination
   Removal and installation of headlights
   Removal and installation of the lateral repeater of turns
   Removal and installation of an additional stoplight
   Removal and installation of a back lantern
   Removal and installation of a lantern of illumination of licence plate
   Removal and installation of plafonds of internal illumination
   Removal and control panel installation
   Removal and installation подрулевого the switch
   Removal and installation of switches of a forward door
   Removal and installation of the switch of light
   Removal and switch installation стеклоподъёмника in a back door
   Removal and installation of the switch of a cover of a luggage carrier
   Removal and installation of the switch of a lay brake
   Removal and installation of the switch of illumination of a ware box
   Removal and installation of switches of the central console
   Removal and radio receiver installation / the navigating device/CD-changer
   Removal and installation of loudspeakers
   Removal and installation of aerials
   Removal and installation of the tank of a liquid of the stekloomyvatelja/electric motor of the pump
   Removal and installation of the electric motor of a cleaner of a windscreen
   Removal and electric motor installation on back glass (Versatile person)
   The uniform lock - the general information
   Removal and installation запорного an element of a cover of a fuel tank
   The digital tyre of given CAN
   + Basic schemes of an electric equipment

The relay and safety locks

The majority of consumers of the electric power of the car is protected by fuses. Separate components of system of illumination, except for lanterns of a signal of braking, are protected by electronic relays.

At course of too strong current electronic interruption of an electric chain of the protected components is made. Through short time the electric chain automatically again becomes isolated at repeated occurrence of malfunction an electric chain again interrupts.

Apply fuses with demanded face value of a current strength.

Fused fuses do not repair and do not shunt a crosspiece.

Establish the reason перегорания.

Relay replacement


Relays are in the panel of devices from outside the driver.

  1. Remove a pocket from outside the driver, address to Section Removal and pocket installation from outside the driver.
  2. Take out the damaged relay by means of special nippers, for example, HAZET 4770-1.
  3. Check up working capacity of the relay and, if necessary, replace it on new, address to corresponding Section.
  4. Establish the relay on a payment.
  5. Establish into place a pocket of the driver, address to Section Removal and pocket installation from outside the driver.

Replacement of safety locks

For protection of wires of an electric equipment and consumers from damage at short circuit and an overload electric chains have safety locks.


  1. Before safety lock replacement ignition and all consumers is necessary to switch off necessarily.
  2. Safety locks are in blocks of safety locks on the left side of the panel of devices, behind a cover (address to an illustration in Specifications).
  3. Open a cover for what insert a screw-driver the flat party from below behind a cover (arrow) and wring out a cover.
  4. The arrangement of safety locks is presented on an underside of a cover of the block of safety locks.

The arrangement of safety locks depends on the equipment and year of release of the car. Besides, there also there is кривошипная a handle for emergency closing of the shifted panel of a roof.

At repeated перегорании a safety lock check up electric equipment chains.