Audi 100/A6

1990-1997 of release

Repair and car operation

Audi 100/A6
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 3.2. Diesel engines
+ 3.3. Removal and partition of engines
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
- 8. Systems of start, ignition
   - 8.1.1. Introduction
      8.1.2. Technical characteristics
      + 8.1.3. Accumulator
      - 8.1.4. Generator / system of additional charge of the accumulator Malfunctions of the generator
      8.1.5. Replacement of the holder of brushes and regulator of tension of the generator
      8.1.6. Check of system of start of the engine
      8.1.7. Starter
      8.1.8. Inlet gas pipeline
      8.1.9. Cable gas/lever of a butterfly valve (DB)
      8.1.10. Cable of management of gas (DB)
      8.1.11. Contour of fuel of the diesel engine
      8.1.12. Prestarting heating of diesel fuel
      8.1.13. Fuel thermostat
      8.1.14. Hydrovalve case
      8.1.15. Cable gas/lever of a butterfly valve (DD)
      8.1.16. Cable of management of gas (DD)
   + 8.2. Ignition system (petrol engines)
   + 8.3. System of prestarting heating (diesel engines)
   + 8.4. System of production of exhaust gases
+ 9. Transmission
+ 10. Brake system
+ 11. Suspension brackets, steering
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice

ff85f19c Malfunctions of the generator


When the control lamp does not die away at normal operation of the engine, malfunction, most likely – in the generator. The truth short circuit on a chain site between a control lamp and the generator yields the same result.

Also check by means of the indicator tension existence on the big socket of the generator. Here it should be always – if it is not present, check generator connection to the storage battery. If the tension regulator on your car is located separately from the generator, it too can be faulty. In this case it is better to remove the generator and a regulator of tension and to address to the autoelectrician.

The simplest check of a current of loading of the generator is made so: marker lights of the car join and the engine is started. If at the working engine fires do not start to burn more brightly, this best proof of that the generator does not give a current. If you have a voltmeter, connect it to plugs of the storage battery and start the engine. On the raised turns of idling the generator should develop a current, and the voltmeter – to show about 14 V.Pokazaniya differ more than on 1 In? It is faulty either the generator, or a tension regulator.

In many cases continuous burning of a control bulb signals about malfunction of the generator, but malfunctions are possible and in other place, and the generator as it is paradoxical, can be serviceable at this time.

And nevertheless for the majority of car owners a control bulb – the unique indicator of serviceability of the generator. Most often meeting reasons of abnormal functioning of a control lamp of a charge and typical situations are given in the table. For example, the line "A control lamp does not light up" means that ignition should be already included, and at the same time it does not mean that the engine should be started. Malfunctions of the generator are given in ascending order probabilities of their emergence. The malfunctions italicized, have no direct relation to the generator. The table explaining to what can lead some of aforementioned malfunctions below is given.

The typical malfunctions reflected by a control lamp of a charge

Does not light up
Leaky contact of brushes
The tension regulator is faulty
Defect in a rotor winding
Bad contact to "weight" or its absence
The storage battery is discharged
The control lamp, safety lock, the switch, electroconducting are faulty
Does not die away
The vypryamitelny block is faulty
Defect in a stator winding
Malfunction in connection with brushes
The bearing (noise) is worn-out
Defects of electroconducting, break of a driving belt
Burns low at engine start-up
The vypryamitelny block is faulty
Leaky connection of electroconducting of a power-supply circuit of a control lamp
Blinks at operation of the engine
Bad contact of brushes
The tension regulator is faulty
Adjustment is broken

Bad contact of brushes Brushes hanged (dirt), are worn-out. Contact rings are polluted.
Malfunction of the vypryamitelny block Connections of plugs with conclusions of the battery of a "mass" wire are polluted or is absent. A mistake at battery connection (return polarity). The wrong connection to the additional battery at engine start-up. Electric welding was carried out at the connected generator. Absence of contact of conclusions in generator sockets, pollution of conclusions or defeat by their corrosion.
Malfunction of the bearing
Arises because of an excessive tension of a driving belt more often. At load of a generator pulley the sliping belt publishes a sharp sound which at all does not mean that a belt will pull. The worn-out driving belt leans on a bottom of a stream of a pulley, instead of on lateral walls of a pulley, as generates such sound.