Audi A4

since 1994 release

Manual of the car

Audi A4
+ 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
   Wires
   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 there is enough accumulator reserve?
      Check of level of acid in the accumulator
      Check of a charge of the accumulator
      Accumulator 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

As far as there is enough accumulator reserve?

How long the consumer of the electric power can work from the accumulator, we calculate on a formula: operation duration = capacities of the accumulator x on tension of onboard network and divided into the power of the consumer of the electric power. But in practice you never have to count on the full capacity of the accumulator but only on a charge to 2/3 its nominal capacities. In this case it is necessary to count, for example, on the following duration of operation:

Accumulator	Parking fires	Parking fires	Alarm system
36 And hour	near 28th hour	near 6th hour	near 3rd hour
44 And hour	near 35th hour	near 8th hour	near 4th hour
70 And hour	near 56th hour	near 12th hour	near 7th hour

Influence of temperature on the accumulator

The accumulator has a property to react to cold of subjects worse, than below its charge. In completely discharged state it is so sensitive that at a frost can freeze and burst. But at a full charge the accumulator transfers cold rather well. Before approach of cold season it is recommended to check a condition of a charge in the old accumulator.