Vehicle power devices Audi A3 8L

Charge and launch systems
All vehicles covered in this manual have a 12V electrical system. The ground connection is through the negative battery terminal. The battery is located in the...

Accumulator battery
The installed 12V battery consists of six jars containing positive and negative plates, which are dipped in a sulfuric acid solution. The task of the battery...

Removing and installing the battery
The battery is located in the engine compartment, behind the left headlight. Warning: Disconnecting the battery will erase data from some electronic memory...

Checking the battery
Checking the electrolyte level You may need distilled water to do the job. In serial batteries, once filled with electrolyte, under normal conditions, it is...

Generator — general information and safety measures
The vehicle has an alternator. When installing additional electrical equipment, make sure that the generator has enough power to power this equipment. The...

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 of 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 brushes of the generator and voltage regulator
Removing the brushes is possible without removing the generator, however, for this it is necessary to remove the upper part of the inlet pipeline. Withdrawal...

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...

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

Removal and installation of a starter
Withdrawal Disconnect the negative cable (–) battery with the ignition off. Warning: As a result, information is erased from the electronic memory units, such...

Check, removal and installation of the traction relay of a starter
In the presence of damage to the traction relay, the starter gear does not enter the flywheel ring gear. As a result, the starter cannot start the engine. This...

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