Audi 80/Avant (B4)

since 1991-1995 of release

Repair and car operation



Audi 80/Avant
+ Technical specification
+ Engines
+ System of production of the fulfilled gases
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ injection System
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
- Body electrosystem
   Minus to "weight"
   Orientation in electrosystem
   Wires
   Plug connections
   Central switchboard
   Additional block of the relay
   Relay and control units
   Unloading relay of contact X
   Safety locks
   Table of safety locks
   Electric circuits
   + Full electroscheme of the Audi 80 car: 2-liter 4-cylinder engine (66 kW)
   + 2-liter 4-cylinder engine (85 kW)
   + 2,3-liter 5-cylinder engine (98 kW)
   + 2,6-liter 6-cylinder engine (110кВт)
   + Additional equipment
   + Storage battery
   + Generator
   Check of a condition of a maple or polilinovy belt
   Tension of a maple belt
   Tension of a maple or poliklinovy belt
   Torn maple a belt
   Engine overheat because of damage of a maple belt
   Review of maple and poliklinovy belts
   Replacement of a maple belt
   List of malfunctions
   Starter
   List of malfunctions
+ ignition System
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications





Unloading relay of contact X

In onboard electric system the unloading relay of contact X (by the way, the simple switching relay) plays a significant role. Therefore the principle of its work here is described.

Contact X the lock of ignition receives a food, only if the ignition key costs in the situation "trip". Via this plug powerful consumers of a current, such as a screen wiper, heating of back glass or the fan in order that at engine start all "force" of the storage battery went on starter work are connected. Certainly, not all these consumers can receive the food through contact in the ignition lock; for this purpose it is too weak. Therefore between them relay connection is necessary, and supply by a food is carried out through it. Contact of the lock of ignition answers (along with supply of headlights by a food) only for a switching current to the relay.