Audi A4, S4

Since 2000 of release

Repair and car operation

Audi A4, S4
+ Introduction
+ Controls and receptions of safe operation
+ Current leaving and service
+ The engine
+ Systems of cooling, heating and the air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of an electric equipment of the engine
+ Manual box of a gear change
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
- Suspension bracket and steering
   Security measures at work
   + Suspension bracket of forward wheels
   + Suspension bracket of back wheels
   + Corners of installation of wheels of the car
   - Steering and safety pillows
      The general data and security measures
      Removal and installation of the block of a pillow of safety
      Removal and steering wheel installation
      Removal and installation of a tip of steering draught
      Removal and installation of a protective cover of the steering mechanism
+ Body
+ Onboard electric equipment

Steering and safety pillows

The general data and security measures

Elements of hydrosystem of the steering mechanism. The 4-cylinder engine and the 6-cylinder diesel engine

1 — the Steering mechanism with hydrostrengthening
2 — a high pressure Hydrowire
3 — the Drain hose
4 — the Cover with the index of level of oil
5 — the Bolt, 5Нм
6 — the oil Tank
7 — the Rubber support
8 — the Collar
9 — the Returnable hose
10 — the Collar, necessarily replace
11 — the Bolt, 10Нм
12 — the cooling Pipeline
13 — the Collar elastic
14 — Homut*

15 — the Soaking up hose
16 — Homut*
17 — the Pump лопастный the 6-cylinder diesel engine
18 — Sealing кольцо*
19 — Sealing кольцо*
20 — the Hollow screw, 47Нм
21 — the Pump лопастный the 4-cylinder engine
22 — Sealing кольцо*
23 — Sealing кольцо*
24 — the Hollow screw, 47Нм
25 — the Soaking up hose
26 — the Collar
*) Necessarily replace

Steering column

The steering consists of a steering wheel, a steering column, the steering mechanism in a kind zubchato-reechnoj transfer and draughts of a steering drive. The steering column transfers steering wheel movements to the steering mechanism. Gear рейка the steering mechanism according to steering wheel turn moves to the right or to the left. Steering draughts through hinges and a rotary fist transfer steering efforts to forward wheels.

Zubchato-reechnaja transfer of the steering mechanism - беззазорная and not demanding service. Within the limits of maintenance service carrying out the control of protective covers and dusterов tips of steering draughts is required only.

The hydraulic booster providing decrease of effort, applied on a steering wheel has a car steering. The hydraulic booster contains the hydropump and the tank of a working liquid. The hydropump sucks in a liquid from the tank and submits it under a high pressure to the operating valve in the steering mechanism. The operating valve has mechanical communication with a steering spindle and directs a liquid, depending on steering wheel turn, to a corresponding cavity of the working cylinder in the case of the steering mechanism. Here the liquid influences the piston and, thus, supports managerial process. Simultaneously the piston squeezes out a liquid from an opposite cavity of the working cylinder through the returnable pipeline in the liquid tank.

Manufacture welding and рихтовочных works with steering elements is not supposed. Self-stopped bolts and nuts, and also bolts and the nuts having corrosion, should be replaced with the new.

The moments of an inhaling of carving connections should be maintained necessarily.

In a steering wheel the pillow of safety of the driver is located. The safety pillow represents developing air bag which is filled with air at a head-on collision of the car and thus protects the top part of a trunk and a head of the driver. At a head-on collision of corresponding force the management block sends a signal to a fuse of a pillow of safety. As a result of explosion gas which inflates a pillow during several milliseconds is formed. It is enough this time, that демпфировать moving moving forward the top part of a trunk of the driver. Then within several seconds the safety pillow again develops, since gases leave a pillow through available apertures.

The safety pillow consists of the gauge of collision, a fuse, the block of management of a pillow of safety and the pillow. The signal on надувание safety pillows is developed by the management block.

The car is equipped by a pillow of safety of the driver and the forward passenger, and also lateral pillows of safety, pillows of safety around a head and натяжителями seat belts. The locations of pillows of safety, as a rule, are designated by inscriptions «SRS Airbag».

The children's seat focused against movement of the car, excepting a special children's seat in a combination to the device of automatic recognition of a children's seat is not supposed to have on a seat of the forward passenger.

From safety reasons it is not supposed to spend any works with the parts belonging to system of a pillow of safety and натяжителя of a seat belt.

Before work with safety systems


  1. Disconnect a negative cable (-) the storage battery at the switched off ignition. It is preliminary necessary to remove a box of the filter of air of salon.

Before a cable detachment find out a protective code of a radio receiver if that is available, address to Section Replacement of the storage battery.

  1. Isolate the negative plug (-) the storage battery to exclude casual contact.
  2. Establish wheels directly, and a steering wheel in average position.
  3. Before removal (contact) of the block of a pillow of safety remove an electrostatic charge. For this purpose quickly concern the door or body lock.
  4. At joining of the storage battery in car salon there should not be people.

Safety across-the-board measures

Never establish components of a pillow of safety of other car or other steering wheel. At replacement establish only new details.

Even after insignificant failure which has not led to operation of a pillow of safety, hand over system of a pillow of safety and натяжитель a belt on check on HUNDRED.

After operation of a pillow of safety in a steering wheel necessarily replace a steering wheel, at operation of a lateral pillow of safety replace a cover in door facing, at operation of a pillow of safety of the forward passenger replace the panel of devices.

It is necessary to replace the block of management with a safety pillow necessarily after triple operation.

The safety pillow is supposed to be checked only on HUNDRED. In no event it is impossible to apply a control lamp, the voltmeter or an ohmmeter to pillow check.

The safety which have fallen from height more 0.5 m, it is necessary to replace elements of a pillow necessarily.

It is necessary to protect elements of a pillow of safety from heat or fire influence. Do not subject elements of a pillow of safety to temperature influence above + 100°С.

Protect a pillow of safety from contact to water, greasing or oil. At hit of water, greasing or oil immediately wipe a pillow.

After removal of a pillow of safety store it so that the soft party specified upward. At return storage there is a danger of emission upwards at casual ignition of the generator of gas. Thereby there is a danger травмирования.

If in work the break becomes, it is impossible to leave a pillow of safety without supervision.

It is not supposed to assort the block of a pillow of safety. In the presence of malfunction it will be replaced completely. As the pillow contains explosive, it is necessary to store reliably it under supervision.

Before car recycling it is necessary to utilise components of a pillow of safety.

At carrying out of any works on the car with electric welding application it is preliminary necessary to disunite a socket of the block of management of a pillow of safety at the disconnected storage battery.