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
   Speedometer
   Tachometre
   Hours
   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
   Switches
   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
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The aerial on back glass

As the aerial for reception of average waves in this type of aerials three metal current-carrying paths in the top of glass are used.

For VHF reception other current-carrying paths which simultaneously serve as heating elements serve. The insufficient height of this system of aerials is compensated by the amplifier under the left back facing of a rack of a roof.

Search of malfunctions in the aerial of back glass

Back facing of a rack of a roof can be removed, having shown a great patience and dexterity, in cars with a leaning back back of a back seat without others разборочных works. But in cars with a rigid back without its dismantle not to manage. As a whole work is facilitated after dismantle of a back reception pocket and lateral facing of a leaning back seat (the head Salon).

 PERFORMANCE ORDER

  1. Remove both facings of racks of a roof behind.
  2. Check up connection with weight of heating of back glass on the right rack of a roof, and also, whether the aerial amplifier fixing screws is reliably connected to weight.
  3. Attentively check up the top three current-carrying paths on back glass: whether there is a visible rupture? If yes, carry out repairs by a current-carrying silver varnish or put new back glass.
  4. Now electric check follows: Disconnect a socket thin white токоподводящего wires above on the amplifier, measure pressure concerning weight. For this purpose include a radio receiver.
  5. Presence pressure from the accumulator: current giving on the amplifier is perfectly in order. There is no pressure: eliminate rupture in a wire.
  6. On the same wire measure a current between a socket of the amplifier and the removed wire.
  7. The ampermeter should show 30–50 мА, otherwise the amplifier of the aerial does not consume a current and, hence, it is faulty – replace.
  8. The following check: disconnect the bottom wire on warmed back glass, include ignition and heating of back glass, measure pressure in a wire.
  9. In it there should be a pressure of the accumulator, otherwise malfunction in токоподводящем a wire or in the amplifier, outline damage.
  10. Disconnect bottom (thick white) a wire on the amplifier, measure pressure at the included ignition and heating of back glass:
  11. If there is a pressure of the accumulator токоподводящий the wire is perfectly in order, probably, the amplifier is faulty. If is not present, on the contrary.

Dynamics in facing of a forward door

Динамик the average frequencies, located below, also it is screwed behind on door facing. Figures from 1 to 3 designate fixing screws.


 PERFORMANCE ORDER

  1. Dismantle facing of a forward door.
  2. Cautiously remove being for door facing демпфирующую a film from polyfoam.
  3. Disconnect a wire socket in a connecting wire from bottom to top dynamics.
  4. Динамик average frequencies: ослабьте three fixing screws dynamics also take out directing wires.
  5. Динамик high frequencies: ослабьте the screw with a crosswise head behind on dynamics, remove динамик.

Back динамик

Back динамик it is screwed from above on body metal under a reception pocket (arrow). That it to dismantle, it is necessary to remove a back reception pocket in the beginning.


 PERFORMANCE ORDER

  1. Dismantle a back reception pocket (the head Salon).
  2. Loosen the screws with crosswise heads, remove динамик.