Vehicle power devices Audi A3 8L

Charging and starting systems
All vehicles covered in this guide have a 12-volt electrical system. The ground connection is through the negative terminal of the battery. The battery is...

Rechargeable battery
The installed 12V battery consists of six cans containing positive and negative plates that are dipped in a sulfuric acid solution. The battery's job is to...

Removal and installation the battery
The battery is located in the engine compartment, behind the left headlight. Warning: Disconnecting the battery erases data from some electronic memory units,...

Checking the battery
Checking the electrolyte level Distilled water may be required to carry out the work. In serial storage batteries, the electrolyte once filled, under normal...

Generator — General Information and Safety Precautions
The vehicle is equipped with an alternator. When installing additional electrical equipment, make sure that the alternator has sufficient power to power this...

Checking the installed generator
During normal driving, the charge control lamp should go out. Otherwise, the fault lies in the generator or voltage regulator. First, check the electrical...

Removal and installation the generator
Generator 1 - V-belt 2 - generator 3 - voltage regulator 4 - bolts 5 - protective cover 6 - bolts 7 - bolts, 50 Nm 8 - bolts, 50 Nm 9 - holder 10 - tensioner...

Checking and replacing the generator and voltage regulator brushes
Removing the brushes is possible without removing the generator, however, to do this it is necessary to remove the upper part of the intake manifold. Removal...

Starter — general information
Starter 1 - front cover 2 - traction relay 3 - casing 4 - brush holder 5 - stator 6 - rotor 7 - drive gear with overrunning clutch The starter is a DC electric...

Checking the engine starting system
If the starter does not work in the "engine start" key position, the following reasons are possible: The battery is faulty. Open circuit between the ignition...

Removal and installation the starter
Removal Disconnect the negative (–) battery cable with the ignition off. Warning: This will erase information from electronic memory units, such as the radio...

Checking, removing and installing the starter traction relay
If the traction relay is damaged, the starter pinion does not engage the flywheel ring gear. As a result, the starter cannot start the engine. This malfunction...

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