Audi A4

since 1994 of release

Repair and car operation


A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and absorption channels
- Injection system
   + System of injection of Motronic
   - System of injection of MPI and MPFI
      Additional functions
      Knots of system of injection
      Functioning
      Adjustment with the help a lambda probe
      Violations in work and self-diagnostics
      Self-help
      Visual control
      Check of knots
      Dismantle of separate details
      Butterfly valve cable
      Inlet collector
      Idling adjustment
      Check of exhaust gases
      The help at malfunctions
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ ignition System
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics


Violations in work and self-diagnostics

The MPI/MPFI control unit can distinguish about 30 defects in electric knots of system of ignition/injection and keep in a computer memory. Distinction between constant defects and sporadic (sometimes) arising failures in work thus becomes. Information on sporadic arising defects is erased after 50 starts of the engine if they did not arise repeatedly.
In a workshop the computer with information on malfunctions is interrogated by means of the device for V.A.G 1551 reading (see head Regular servicing). The fan has no possibility for such poll therefore at expected defect in system of ignition/injection it is necessary to charge for a workshop to consider information on malfunctions in a memory.

In addition you can use the section Help at malfunctions at the end of head in whom the set of the possible defects revealed by means of self-diagnostics is given.

For form's sake after repair in a workshop it is necessary to erase information on malfunctions by means of the device for reading.