Audi 100/A6

1990-1997 of release

Repair and car operation

8.1.4.1. Malfunctions of the generator

THE GENERAL DATA

When the control lamp does not die away at normal work 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 up by means of the indicator pressure presence on the big socket of the generator. Here it should be always – if it is not present, check up generator connection to the storage battery. If the pressure 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 pressure and to address to the autoelectrician.

The elementary check of a current of loading of the generator is made so: dimensional fires 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.Pokazanija differ more than on 1 In? It is faulty either the generator, or a pressure regulator.

In many cases constant 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 automobile owners a control bulb – a unique indicator of serviceability of the generator. The most often meeting reasons of abnormal functioning of a control lamp of a charge and typical situations are resulted in the table. For example, the line "the 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 resulted in ascending order probabilities of their occurrence. The malfunctions italicised, have no direct relation to the generator. The table explaining in what can result some of aforementioned malfunctions is more low given.

The typical malfunctions reflected by a control lamp of a charge

THE CONTROL LAMP	THE REASON
Does not light up	Leaky contact of brushes
	The pressure 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	It is faulty выпрямительный the block
	Defect in a winding статора
	Malfunction in connection with brushes
	The bearing (noise) is worn out
	Defects of electroconducting, breakage приводного a belt
Burns low at engine start-up	It is faulty выпрямительный the block
	Leaky connection of electroconducting of a feed circuit of a control lamp
Blinks at engine work	Bad contact of brushes
	The pressure regulator is faulty
	Adjustment is broken

THE GENERATOR	THE REASON
Bad contact of brushes	Brushes зависли (dirt), are worn out. Contact rings are polluted.
Malfunction выпрямительного the block	Connections of plugs with conclusions of the battery of a "mass" wire are polluted or is absent. An error at battery connection (return polarity). Wrong connection to the additional battery at engine start-up. Electric welding was spent at the connected generator. Absence of contact of conclusions in generator sockets, pollution of conclusions or defeat by their corrosion.
Malfunction of the bearing	More often arises because of an excessive tension приводного a belt. At loading on a generator pulley the sliping belt publishes a sharp sound which at all does not mean that a belt will pull. Worn out приводной the belt leans against a bottom of a stream of a pulley, instead of on lateral walls of a pulley, as generates such sound.