Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car

Audi 80/Avant
- Technical specification
   15-inch wheels
   Brake system
   Passive safety
   Full drive
   Distributive Torsen-differential
   Dynamics of the movement at a dry paving
   Instructions on operation for all-wheel drive cars
   Blocking of differential of the back bridge
   Motor compartment
   Regular servicing
   Organization of a workplace
   Lubricant works
   Oil consumption
   Right choice of engine oil
   Replacement of engine oil and oil filter
   Check of level of working liquid of the power steering
   Check of level of oil of a mechanical transmission
   Check of level of oil in the drive of the back bridge
   Control of the ATF level in an automatic transmission
   Check of level of oil in the main transfer of an automatic transmission
   Replacement of ATF
   Greasing of hummock drives, hinges and locks
+ Engines
+ System of production of the fulfilled gases
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ System of injection
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications

Regular servicing

Reliability and safety are inconceivable without leaving and servicing. Otherwise you should not be surprised to problems with the car. Where and when it is necessary "to spread straws", it is written in the detailed instructions on servicing made by Audi.

Maintenance terms

For our with Audi 80 the following instructions on servicing work:

  • Technical inspection with simultaneous check on toxicity of the fulfilled gases – once a year.
  • Technical inspection with additional works everyone 30 000 and 60 000 passable km.
  • Oil replacement if in a year the car passes more than 15 000 km, thereby exceeding a year interval of checks. For those who runs in a year big run (more than 15 000 km), and for carrying out regular checks uses services of auto repair shops, there can be adverse "crossings". At 20 000 km a year replacement of oil has to be made already before year check. For this purpose, who passes 25 000 km in a year, it is better to carry out 30 000-kilometer inspection after the expiration of a year interval. Well, and those who does everything itself, can solve necessarily as when they want to make.
  • Each two years drivers of Audi need to replace brake fluid.

Plan of independent servicing

The plan of servicing considered in this management also is based on recommendations of Audi, and the sequence of separate points was made especially for those who likes to do everything.

Who can perform works?

Guarantee maintenance

You can independently perform almost all works on servicing of Audi 80. "The motorist's traffic light" will specify to you thus the correct way:

  • For the motorist the way is free. You can carry out this work, having armed with knowledge from this management and by that to save money.
  • Work though is not heavy, but in most cases at you near at hand it can not appear the necessary adaptations.
  • Stop, let better here the workshop works. Special tools or devices are necessary. The amount of the spent time does not justify itself because the workshop works much quicker or for performance of work special, more profound knowledge is necessary.

If your Audi 80 car is younger than one year or replacement of the engine is made, the manufacturer demands that works on servicing were carried out in one of firm workshops of Audi in time. Otherwise to you it can be refused support even in reasonable guarantee cases. And the one who wants to take advantages "guarantees on mobility", has to appear at least once a year in a workshop.

Diagnostics in Audi workshop

Often search of malfunctions is the most expensive, for what it is necessary to pay the bill in a workshop, – especially when it is about the phenomena arising only from time to time. Therefore that can be more true than check of "nervous communications" of the car in such a way immediately to learn about a problem in all its depth?

Principle of work

The numerous control units installed in Audi are capable to independent diagnostics. In this row it is possible to call control units of system of injection, system of ignition (model with the 5-cylinder engine), anti-blocking system, EDS (electronic blocking of differential), a safety cushion or the conditioner. Is able to diagnose the similar control unit if the store of malfunctions which is writing down all failures at operation of the car is built in it.

The control unit can be connected to diagnostic installation in a workshop by connection to the central plug for connection of the diagnostic center on the case of the central distributing device of the car.

As it occurs

The correct use of opportunities of poll of memory of the store of malfunction has to take place so: the driver comes on the Audi to a workshop, and even before any works the car connect to diagnostic installation. From it print out the full protocol of malfunctions which contains data of stores of malfunctions of all control units, capable to diagnosing.

Testing is held by the mechanic according to the program by means of implementation of the corresponding instructions on the display. The end result is exact determination of the knots and units which are subject to repair.

Diagnostics of regulator

Decisive factor of fast and correct repair is also function of diagnostic installation which Audi calls diagnostics of regulator. Thus the following means: electric functions – such as actuating of the relay of the fuel pump, the electromagnetic valve for a tank with absorbent carbon or the valve of stabilization of frequency of rotation of a shaft of the engine in the mode single the course, can be connected to diagnostic installation.

Thus it is possible to find out absolutely definitely, whether the reason in defective conducting is covered or the block does not function (its functioning which is not muffled by a sound of operation of the engine is usually well listened). And it significantly facilitates search of malfunctions.

Poll of the store of malfunctions

At maintenance poll of the store of malfunctions is included into the volume of the performed works. Thus the workshop can receive idea of possible malfunctions in work of electronic knots of the car, and without asking in detail the client.

The one who is engaged in servicing, can refuse during the work this point as it watches the car in the course of daily operation – that is he would have to notice possible malfunctions.

Independent diagnostics

Times when autodrivers as it was with folksvagenovsky "bug", could perform all works on the car, finally consigned to the past. But it does not mean at all that independent repair of own car is absolutely impossible. Absolutely on the contrary. It is only necessary to change slightly a method of work and to use modern equipment.

So, for example, results of survey of the store of malfunctions conducted by a workshop can quite be used in work in house conditions. The subsequent example has to give to this thought presentation.


  • The 85-strong engine with system of injection of Digifant at full loading finds insufficient power. Artfully, it not all the time such weak-willed, but only from time to time
  • As skilled mekhniki-amateur, we already checked the car on points provided in this management in the section List of Malfunctions of System of Injection of Digifant.
  • Usually we already for certain found malfunction, but that fact that it appears only from time to time, complicates search.
  • On this example the clear advantage of the store of malfunctions because it keeps and sporadic the arising malfunctions is visible.
  • Result of poll of the store of malfunctions: defect of the sensor of angular movement of a butterfly valve (leaky contact).

The store of malfunctions of various monitors is interrogated by means of this diagnostic unit. Thereby it is possible to carry out a fast assessment and to diagnose the corresponding control unit and its information sensors. Besides, information containing in the store of malfunctions can be erased by means of this device.

In the block of safety locks (the central switchboard) there are plug connections (on shooters) to which it is possible to connect the V-A-G 1551 diagnostic unit.