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
   + System of injection Mono-Motronic
   + System of injection Digifant
   + System of injection KE-III-Jetronic
   - Systems of injection MPI and MPFI
      Operating procedure
      Malfunctions and independent diagnostics
      Independent repair
      Visual check
      Check of separate elements
      Removal of elements
      Trosovyj drive of "gas"
      Check of a mode of idling and the analysis of exhaust gases
      The list of malfunctions
+ 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
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications


Malfunctions and independent diagnostics

The block of management of system of injection can distinguish and write down in memory of the store of malfunctions of exactly 30 kinds of the malfunctions arising in electronic system of system of ignition/injection. It is thus fixed: whether the given malfunction is permanent or sporadic (arising only from time to time). Records about спорадически arising malfunctions are erased after 50 starts of the engine in the event that sporadic malfunction has not appeared again.

Data of the store of malfunctions is read out in workshops by means of the special device for V. A. G 1551 (see has undressed Regular servicing). In house conditions it is impossible to interrogate memory of the store of malfunctions, therefore in case of suspected defect of system of ignition/injection it is necessary to address in a workshop for data read-out of the store of malfunctions. In addition you can take advantage and our list of malfunctions resulted in the end of the head in which the numerous possible malfunctions which are beyond independent diagnostics are resulted. Memory of the store of malfunctions after the made repair needs to be cleared in a workshop.

 The help: the block of management of system of injection MPFI (the 2,6-litre engine) remains active within one and a half hours after ignition deenergizing. It means that defect of system of injection arising at this time also registers in memory of the store of malfunctions. As defect is distinguished, including disconnected, (for example for the gauge control) the tip.

But the aforesaid, however, does not mean that you should wait each time an hour and a half before to start repair. After all similar interruption as malfunction arises only once and, hence, gets to "box" for sporadic (arising from time to time) malfunctions record about which, as it is known, is again erased.