Audi A4

since 1994 release

Repair and operation of the car

A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
- Electrotechnical equipment
   Minus is connected to weight
   The help for orientation in the electrotechnical equipment of the car
   Connections of wires
   Central switching knot
   Support of additional relays
   Box for electronics
   Relay and control units
   Switching relay
   H-contact of the relay of unloading
   Table of the relay and control units
   Safety locks
   Table of safety locks
   + Electric circuits
   - Accumulator
      Correctly picked up accumulator
      As far as the accumulator reserve is enough?
      Check of level of acid in the accumulator
      Check of a charge of the accumulator
      Battery charging
      Start of the engine with the discharged accumulator
   + Generator
   + Starter
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics

Check of a charge of the accumulator

If, despite the necessary level of acid, the accumulator does not give life signs, it is necessary to check a condition of its charging. Information on it can be received on the basis of the specific weight of acid in the accumulator. For carrying out this check you need the special areometer which you can hire at gas station.


  1. Unscrew an accumulator stopper.
  2. Suck away so much acid to provide free swimming of the areometer.
  3. Look what specific weight of acid is available: 1,28 kg/l – the accumulator is charged completely; 1,20 kg/l – it is loaded half; 1,12 kg/l – it was discharged.