Audi A3

Since 1997 of release

Repair and car operation



Audi A3
+ The maintenance instruction
+ Current leaving and service
+ The engine
+ Systems of cooling, heating
+ The power supply system and release of the fulfilled gases
- Engine electric equipment
   + System of electronic control by ignition and injection
   - Charge and start systems
      The storage battery
      Removal and installation of the storage battery
      Check of the storage battery
      The generator - the general data and security measures
      Check of the established generator
      Removal and generator installation
      Check and replacement of brushes of the generator and pressure regulator
      Starter - the general data
      Check of system of start of the engine
      Removal and starter installation
      Check, removal and installation of the traction relay of a starter
+ Manual box of a gear change
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Electroschemes





Check of the storage battery

THE GENERAL DATA

Check of level of electrolit

The distilled water can be necessary for work carrying out.

Serial storage batteries once the filled in electrolit, under usual conditions, have enough on all service life of the battery. Nevertheless, at high external temperatures and after battery gymnastics, and also at maintenance service carrying out it is necessary to check up electrolit level.

PERFORMANCE ORDER
1. The storage battery is in an impellent compartment. Open a battery casing, having opened clips, and press a casing downwards.
2. Check up outside electrolit level through the transparent case of the battery. If in one of sections electrolit level has fallen below marks MIN, turn out a stopper.
ATTENTION

If it is impossible to define electrolit level, turn out a stopper and glance in the battery. Do not use thus open fire. There is a danger of explosion!


3. Average stoppers are closed by the block of safety locks. To remove the block, compress laths and cast away a cover.
4. Disconnect a negative cable (–) the storage battery at the switched off ignition.

ATTENTION

Thereof the information from electronic blocks of memory, as, for example, a radio receiver code is erased. Without a code the radio receiver can be included only the manufacturer or in conditions HUNDRED AUDI. Therefore familiarise with remarks in subsection Removal and installation of the storage battery.


5. Thereof the information from electronic blocks of memory, as, for example, a radio receiver code is erased. Without a code the radio receiver can be included only the manufacturer or in conditions HUNDRED AUDI. Therefore familiarise with remarks in subsection Removal and installation of the storage battery.
6. Fill with the distilled water each section separately to a mark the MOVE.
7. Screw and tighten a stopper.
8. Insert into place the main block of safety locks and fix its nut–2.
9. In summary charge the battery, thus address to subsection Check of a condition of the battery, care it and gymnastics.
10. At suspicion on malfunction of the battery measure pressure of rest, thus address to below-mentioned subsection.
11. Attach a negative cable (–) to the battery.
ATTENTION

Make active automatics of safety electric Glass lifts, enter a radio tape recorder code, establish hours, thus address to section Automatic transmission and models with a full drive.


12. Fix clips a casing of the storage battery.

Check of fastening of plugs of the storage battery and the holder


ATTENTION

If the storage battery is badly fixed or plugs premature failure of the battery because of vibration, ignition of cables or malfunction in electric equipment work can become a consequence are not fixed. As at not attached batteries are erased the data of electronic blocks of memory, for example, a radio receiver, familiarise with subsection Removal and installation of the storage battery and subsection Input of a code of a radio receiver.


PERFORMANCE ORDER
1. Move plugs of the storage battery every which way and check up reliability of their fastening, if necessary tighten.
2. If the storage battery is badly fixed, tighten a bolt of fastening by the moment 20 Н m.

Check of pressure of rest

The condition of the storage battery is checked by measurement of pressure by the voltmeter included between poles of the battery.

PERFORMANCE ORDER
1. Disconnect the storage battery, thus address to subsection Removal and installation of the storage battery.
2. For 2 hours before check the battery should be disconnected.
3. Attach the voltmeter to plugs of the battery and measure pressure.
4. An estimation of size of pressure:

12.5 In or more – the battery in a good condition
12.4 In or less – the battery in bad condition, it it is necessary to charge or replace with the new.
5. Attach a negative cable (–).
ATTENTION

Make active automatics electric Glass lifts, and also establish hours and enter a radio receiver code, thus address to subsection Removal and installation of the storage battery and подразделуВвод a radio receiver code.


Check of the storage battery under loading

PERFORMANCE ORDER
1. Attach to plugs of the battery the voltmeter.
2. Start the engine and check up pressure.
3. At the moment of engine start at completely charged battery pressure should not fall more low 10 In (at electrolit temperature nearby +20С).
4. If pressure sharply falls also electrolit density in various sections is various, the battery is damaged also it it is necessary to replace.

Check of density of electrolit

The electrolit density in a combination to pressure gives exact representation about a condition of a charge of the battery. For check of density of electrolit serves денсиметр. At check of the battery the electrolit temperature should be not less +10С.

PERFORMANCE ORDER
1. Switch off ignition.
2. Turn out from the battery all stoppers. If there is a roof, remove it at first a screw-driver.
3. Insert денсиметр into one of sections of the battery and type quantity of electrolit, sufficient for float emersion. The more relative density (density) of electrolit, the emerges a float more. On a scale it is possible to consider density of electrolit in terms of relative density (g/ml) or in degrees to Boma (+ Ве).
4. The electrolit density should be not less than 1.24 g/ml – address to Specifications. If low, the battery it is necessary to charge density.
5. Check up one after another each section. All sections should have identical density (the greatest difference of 0.04 g/ml). If the difference is more, the battery is faulty.

Gymnastics of the storage battery


ATTENTION

Before a charge of the storage battery familiarise with remarks on the security measures resulted in subsection Removal and installation of the storage battery.


PERFORMANCE ORDER
1. Do not disconnect the storage battery at the working engine.
2. Never close the battery накоротко, i.e. do not connect positive (+) and negative poles (–). Thus the battery is warmed up and can burst.
3. Do not use near to the battery an open flame. The electrolit is poisonous. Do not suppose its hit in eyes, on a skin and on clothes. Otherwise plentifully wash out electrolit water.
4. At the battery with central газоотводом, at a charge, a stopper (crosswise шлиц) do not turn out.
5. Before gymnastics of the frozen battery allow to it to thaw. The charged battery freezes at temperature nearby 65С, the semicharged battery at temperature nearby 30С and discharged at temperature nearby 12С. After thawing the battery check up on presence of cracks. If necessary replace.
6. At a battery charge normal зарядным the device or the device with the accelerated gymnastics remove the battery. At least, disconnect negative (–) and a positive cable (+).

At application portable зарядного devices (a small current strength) the gymnastics can be carried out without battery removal. A connecting cable to an onboard network to disconnect thus it is not required. It is necessary, naturally to consider the data of the manufacturer of the battery.

Gymnastics

PERFORMANCE ORDER
1. Remove the storage battery.
2. Check up electrolit level. If necessary add the distilled water, thus address to corresponding Section.
3. A battery charge make only in well aired premise or in the open air. At a charge of the battery without its removal from the car open a cowl.
4. Check up, whether it is pressed газоотводный a hose and whether it is littered газоотводный a branch pipe.
5. If on the device for a fast charge it is possible to regulate a current strength, establish the charge current, equal 10 % of capacity of the battery, i.e. at capacity of 50 Ach establish a current about 5 A.Vremeja of a charge it is possible to accept равным10 hour.
6. At the switched off device for a charge attach a positive cable (+) devices to a positive pole (+) batteries. A negative cable (–) devices connect to a negative pole of the battery (–).
7. Insert the network tip of the device for a charge into the socket. If it is necessary, include the device.
8. If the battery is charged by a direct current, check up battery temperature, having put on it a palm. The temperature of electrolit during a charge should not exceed +55С. Otherwise interrupt process of gymnastics or lower зарядный a current.
9. After the charge termination switch off the device (if probably) and disconnect the network tip зарядного devices.
10. Disconnect a cable зарядного devices from the storage battery.
11. Check up a battery charge, thus address to subsection Check of a condition of the battery, care it and gymnastics.
12. Establish the battery into place, thus address to corresponding Section.

Remarks for the storage battery with stoppers

PERFORMANCE ORDER
1. Before a charge turn out from the battery of a stopper or a narrow screw-driver uncover and slightly close to it apertures. Thus, it will be excluded разбрызгивание electrolits owing to formation of gases.
2. A charge make until from all sections gas, and pressure and density of electrolit will not go plentifully during three gaugings following one after another during three hours, will not change.
3. After end of a charge of the battery allow to it to leave to gases within 20 minutes Then close stoppers.

Gymnastics strongly discharged and сульфатированной the storage battery

The storage battery, long time not used (for example, at long parking of the car), is discharged and сульфатируется in due course. If pressure of idling of the battery lies more low 11.6 In the battery is considered strongly discharged. Check up pressure of rest. At strongly discharged battery of electrolits consists almost of one water.
ATTENTION

At negative temperature such battery can freeze, and the battery case to burst.
Strongly discharged battery сульфатируется, i.e. on a surface of electrodes are formed large малорастворимые crystals of sulphurous lead. The electrolit thus loses a transparency and gets weak white colouring.
If strongly discharged battery is charged directly after the category, сульфатация occurs again. Otherwise battery plates continue to harden and possibility of a charge of the battery for long time remains limited.
Strongly discharged and сульфитированная the battery should be charged by the lowered current about 5 %, i.e. at capacity of the battery of 60 Ach force зарядного a current should make 3 And.
Pressure of a charge should make no more than 14.4 Century
In no event it is impossible to charge strongly discharged battery the device for a fast charge.



Fast gymnastics/help at start

PERFORMANCE ORDER
1. The device for a fast charge charge the battery only for maintenance of start of the car. Thus force зарядного a current makes 20 % and more from battery capacity. Thus the battery is damaged, since. Is exposed to influence of the big currents. Time not used and strongly discharged battery is long it is not necessary to charge the device for a fast charge since it leads сульфатации.
Storage of the storage battery
2. If the car was not used more than two months, the storage battery is necessary for removing and charging. The optimum temperature of storage of the battery makes from 0 to +27С. At these temperatures the self-category of the battery the minimum. To charge the battery it is necessary not less often than an once in two months, differently it becomes unfit for use.

The battery which was not used long time (for example, it was not maintained the car), is discharged and, besides, can сульфатироваться. If such battery is charged by the device for a fast charge, she does not perceive зарядного a current or owing to сульфатации becomes too quickly "completely" charged. Actually the battery is damaged.

Before to define the battery as damaged, it is necessary to check up the following:
3. Electrolit density. If the difference between density in separate sections does not exceed 0.04 g/ml it is necessary to charge the battery normal зарядным the device.
4. After a charge check up the battery under loading. If characteristics of the battery below resulted in Specifications, the battery is damaged.
5. If the electrolit density in one or in two next sections considerably differs (for example, in five sections 1.16 of g/ml, and in the sixth 1.08 g/ml) the battery has short circuit and it is necessary to replace it.
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