Audi 80/Avant (B4)

Since 1991-1995 of release

Repair and car operation



Audi 80/Avant
+ The description
+ Engines
+ System of release of the fulfilled gases
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and воздухозаборные channels
+ Injection system
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Antiblocking system of brakes
+ Wheels and tyres
- Kuzovnaja electrosystem
   Minus to "weight"
   Orientation in electrosystem
   Wires
   Plug connections
   The central switchboard
   The additional block of the relay
   The relay and management blocks
   The unloading relay of contact Х
   Safety locks
   The table of safety locks
   Electric schemes
   + The full electroscheme of car Audi 80: the 2-litre 4-cylinder engine (66 kw)
   + The 2-litre 4-cylinder engine (85 kw)
   + The 2,3-litre 5-cylinder engine (98 kw)
   + The 2,6-litre 6-cylinder engine (110кВт)
   + Additional equipment
   + The storage battery
   + The generator
   Condition check клинового or полилинового a belt
   Tension клинового a belt
   Tension клинового or поликлинового a belt
   Torn клиновой a belt
   Overheat of the engine because of damage клинового a belt
   The review wedge and полиwedge belts
   Replacement клинового a belt
   The list of malfunctions
   Starter
   The list of malfunctions
+ Ignition system
+ Illumination
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications



The unloading relay of contact Х

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

Contact Х of the lock of ignition receives a food, only if the ignition key costs in position "trip". Through this plug powerful consumers of a current, such as a screen wiper, heating of back glass or the fan that at engine start all "force" of the storage battery went for 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.