Audi 100

1982-1990 of release

Repair and car operation

10.14. Antiblocking system of brakes (ABS)

THE GENERAL DATA

Scheme ABS

1 – the gauge of frequency of rotation of a wheel; 2 – the brake mechanism of a wheel; 3 – the hydraulic block; 3а – the solenoidal valve; 3b – the pump; 4 – the main brake cylinder; 5 – the management block; 6 – a control lamp in a combination of devices; 7 – switch ABS

Structure ABS includes four gauges of frequency of rotation of wheels, the pressure distributor, the electronic block of the management, four gear wreaths, the wheels established on naves, and also a control lamp and switch ABS located on the panel of devices. The electronic block of management is established under a pillow of a back seat. The block obtains the data about frequency of rotation of wheels from gauges and on the basis of this data gives out signals on electromagnetic valves of the distributor of pressure. The pressure distributor is established in a compartment of the engine after the main brake cylinder. On the distributor four electromagnetic valves from which tubes to working cylinders of brake mechanisms of wheels depart are established. On a signal of the block of management valves support necessary pressure in a hydrodrive of each brake mechanism.

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The prevention

At carrying out of electrowelding works it is necessary to disconnect колодку with wires from the electronic block of management at the switched off ignition. At colouring of a body with the subsequent drying in the chamber at temperature 85 ° With and above the electronic block of management is necessary for removing from the car. Otherwise the management block can fail.

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Removal and installation of the distributor of pressure

The pressure distributor

1 – the pressure distributor; 2 – the relay of electromagnetic valves; 3 – the pump relay; 4 – the holder of wires; 5 – a cover; 6 – a tube to the brake mechanism Forward right wheel; 7 – a tube to the main cylinder of a brake; 8 – a tube to the brake mechanism back The left wheel;

9 – a tube to the brake mechanism of a back right wheel; 10 – a nut; 11 – a holder; 12 – a rubber pillow; 13 – a tube to the brake mechanism of a forward left wheel; 14 – a wire on "weight"

PERFORMANCE ORDER

1. To disconnect a wire from "the minus" plug of the storage battery. 2. To pump out a brake liquid from a tank. 3. To disconnect from the distributor of pressure of a tube. 4. To uncover, having turned out the fastening screw. 5. To disconnect колодку with wires from the distributor. 6. To turn away a nut of fastening and to disconnect from the distributor a wire going on "weight". 7. To turn away a nut of fastening and to remove the distributor of pressure from an arm. 8. To establish the pressure distributor upside-down. At installation to replace nuts of fastening and to tighten their moment 7 Н·м (0,7 кгс·м). After installation to pump over system of a hydrodrive of brakes.

Removal and installation of the electronic block of management ABS

PERFORMANCE ORDER

1. To disconnect a wire from "the minus" plug of the storage battery. 2. To remove a pillow of a back seat. 3. To disconnect from the electronic block of management колодку with wires, having compressed a spring clip. 4. To turn on two nuts of fastening and to remove the electronic block of management. 5. To establish the electronic block of management upside-down. Колодку with wires to connect to the management block it is possible only at the switched off ignition or the disconnected accumulator room of the battery.

Removal and installation of the gauge of frequency of rotation of a wheel

Installation of the gauge of frequency of rotation forward () and back () wheels

1 – a rotary fist; 2 – колодка with wires; 3 – the holder; 4 – the gauge of frequency of rotation; 5 – a lining; 6 – a bolt;

7 – a nave; 8 – a gear wreath; 9 – a brake board; 10 – a pin; 11 – a beam of the back bridge

PERFORMANCE ORDER

1. To remove a wheel. 2. At removal of the gauge of the right forward wheel it is necessary to remove a tank стеклоомывателя to disconnect колодку the gauge from a plait of wires, and gauges of back wheels – a back of a back seat. To disconnect колодку. 3. To turn away a bolt of fastening and to remove the gauge. 4. To establish the gauge of frequency of rotation of a wheel upside-down.