Audi A4

since 1994 of release

Repair and car operation



A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and absorption channels
+ injection System
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
- Electrotechnical equipment
   The 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
   + Generator
   + Starter
+ ignition System
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics





Box for electronics

The cover of a box with electronics is fixed by five bolts with six-sided heads (arrow). One of bolts should unscrew through an opening in a cover under a windscreen.


In a box with electronics there is a control unit (2) systems of ignition/injection. In the relay switch (1) the heating relay a lambda probe (the engine with working volume of 2,6 l) or the height sensor (a turbodvigatel with working volume of 1,8 l) is placed.

To protect sensitive control units ignition/injection system from high temperatures which reign in the summer in the car, them placed in the closed box between an impellent compartment and a windscreen. To open a box with electronics, it is necessary to unscrew five bolts with six-sided heads. In a box with electronics, except the control unit the control unit heating a lambda probe is the engine, in the car with the engine of 2,6 l.

 Council: The cover of a box with electronics in a vlagozashchitny box should be closed, differently during movement will blow to the driver in feet.