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
+ Ignition system
+ Illumination
+ Signalling devices
- Devices and auxiliary devices
   Check of indicators and signalling devices
   Elements of a combination of devices
   The indicator of quantity of fuel
   The indicator of temperature of a cooling liquid
   Voltage stabilizer
   Additional devices
   The top indicators in a combination of devices
   The indicator of a cooling liquid
   The indicator of brake system
   The indicator of pressure of oil
   Indicators of indexes of turns
   The bottom indicators
   The indicator of a charge of the storage battery
   The indicator of indexes of turn of the trailer
   The indicator of a pillow of safety
   The indicator of antiblocking system
   The headlight indicator
   The indicator of a lay brake
   Self-examination system
   The ignition lock
   Check of switches
   Buzzer of switching-off of illumination and radio
   Cigar Lighter
   Heating of back glass
   Check of screen wipers and windscreen
   The screen wiper engine
   The list of malfunctions
   Screen wiper of back glass
   The list of malfunctions
   Replenishment of a tank of a washer of glasses
   System of washing of headlights
   The aerial of back glass
   Electric regulation of external rear-view mirrors
   System of locks with the central management
   Electric window raiser
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications


The indicator of temperature of a cooling liquid

The gauge of an ambient temperature (arrow) is located in a bumper at the left behind a radiator lattice.

At the left: under the temperature gauge of system of injection (2) the model with the 5-cylinder engine has an electronic thermoswitch (1). The scheme of an arrangement of contacts the following:

Т – the temperature indicator;
R – the conditioner;
+ – A food;
With – a control bulb an overheat of a cooling liquid.

On the right: models with the 6-cylinder engine have a same electronic thermoswitch (arrow) with the identical scheme of an arrangement of contacts. It is screwed in in the pipeline with a cooling liquid, behind to the right of the engine.

The indicator of temperature of a cooling liquid operates approximately the same as also the indicator of quantity of fuel. A food arrives to the device at the included ignition, connection on "weight" occurs through the temperature gauge on the engine. This gauge is represented by the resistance passing the more current, than above temperature so the bimetallic element in the device heats up more strongly owing to what the needle deviates further. In Audi two various kinds of temperature gauges are used.

    The standard gauge ("overheat" combined with the switch for a signalling device of temperature of a cooling liquid). It is established in models with the 4-cylinder engine, not equipped with the conditioner. Electronic thermoswitch (has also other functions) in models with the 4-cylinder engine, equipped with the conditioner, and also in models with 5 and the 6-cylinder engine. Arrangement of contacts of the temperature gauge – on illustrations.

 The help: at too heat of a cooling liquid the red blinking warning signalling device in addition lights up. In the cars equipped with system of autocheck, there is a symbol a cooling liquid.


    The inexact indicator of temperature of a cooling liquid at simultaneously inexact indicator of quantity of gasoline specifies in the damaged voltage stabilizer. The reason for completely absent indication can be both the temperature gauge, and the device. At a correct indicator, but simultaneously blinking signalling device it is necessary to check up the gauge of level of the cooling liquid, located in a broad tank.

Check of the indicator of temperature of a cooling liquid


    To separate the tip of the temperature gauge in a motor compartment. With wire slice to extend separate plug contact to the temperature indicator (a sine-brown wire) in the multicontact tip and to bring to the bared metal ("weight"). For a short while to include ignition: if motionless before the indicator needle starts to move now on a scale, means, the temperature gauge is faulty – to replace. If in the indicator varies nothing, means, there is a rupture in conducting, or defect of the indicator. Its removal is described in the beginning of the head.