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





Support of additional relays

For relay and control units which do not take place in the central switching knot, in Audi A4 also under a control panel so-called support of additional relays are established:

  • The 13-seater support of additional relays takes place over the central switching knot.
  • The 8-seater support of additional relays is in a certain degree at the second level ahead under the central switching knot and a 13-seater support of additional relays. Except numerous relays and control units, various thermosafety locks here take place.

Placement of nests of «a 13-seater support of additional relays». What knots there are connected, is explained in the table.

At the left: «the 8-seater support of additional relays» (arrow) settles down under the central switching knot, and on it along with the relay (1) also various thermosafety locks (2) in addition take place.

On the right: placement of nests of «a 8-seater support of additional relays».