Repair and operation of the car Mazda 323 - Anti-blocking system (ABS)//m323.ru

Mazda 323

since 1985 release

Repair and operation of the car



Mazda 323

+ Introduction
+ Petrol engines
+ Engine lubrication system
+ Engine cooling system
+ System of ignition
+ Power supply system, carburetor, system of injection of fuel
+ Diesel engine
+ System of production of the fulfilled gases
+ Coupling
+ Manual transmission
+ Automatic transmission
+ Suspension bracket and system of steering
- Brake system
   Specifications of the brake system
   Forward brake
   Removal and installation of front brake shoes
   Check of thickness / side beating of a brake disk
   Removal and installation of blocks of a back disk brake
   Removal and installation of a support of a brake
   Removal and installation of a brake disk
   Removal and installation of back brake blocks / brake drum
   Removal and installation of the wheel brake cylinder
   Repair of the wheel brake cylinder
   Brake fluid
   Pumping of the brake system
   Replacement of brake pipelines and hoses
   Check of the brake amplifier
   Removal and installation of the switch of stoplights
   Emergency brake
   Adjustment of the emergency brake
   Anti-blocking system (ABS)
+ Wheels and tires, body, coloring of the car, care of the car
+ System of electric equipment
+ Heater, system of lighting, devices
+ Governing bodies and methods of operation
+ Electric circuits






Anti-blocking system (ABS)

Depending on model and execution of MAZDA 323 it can be equipped with anti-blocking system (ABS). The additional ABS installation is impossible. The anti-blocking system prevents blocking of wheels at sharp braking. Thus, the car at full braking remains operated. By means of 4 sensors of speed the speed of each wheel is measured. On the basis of signals of separate sensors of speed the electronic device calculates the average speed which approximately corresponds to car speed. Comparing the speed of a separate wheel to the average speed of all wheels the monitor defines a condition of skidding of a wheel and can determine the moment when the wheel is close to blocking.

If the wheel is inclined to blocking, i.e. pressure of brake fluid in the corresponding support is too high in relation to the force of adhesion of a wheel with the road, the hydraulic system on the basis of a signal from the monitor keeps liquid pressure to constants. It means that pressure does not increase any more, despite pressing of a pedal. If there is a blocking threat further, brake pressure decreases opening of the final valve until the wheel does not start over again accelerating, then pressure is again supported to constants. Back wheels cope together, pressure in system decides by a back wheel on the greatest pro-slipping.

If the wheel disperses quicker than a certain value, pressure in system increases, however, no more general pressure of all system again.

This process for each wheel repeats until the accelerator pedal is released, or the car will not be in the state close to a stop (2-3 km/h).

The protective system provides automatic shutdown of ABS at an exit it out of operation (for example, because of break of a cable) or at too low voltage (tension of the battery is lower 10,5 In). In this case during the movement the control lamp of ABS lights up. The ordinary brake system functions. The car when braking behaves as if it had no ABS. If during the movement the control lamp of ABS lights up, it means that the anti-blocking system is disconnected.

1 — the main brake cylinder
2 — the braking force distributor
3 — the hydraulic unit
4 — the ABS monitor
5 — the ABS relay

6 — forward sensors of speed
7 — back sensors of speed
8 — a forward touch ring
9 — a back touch ring
10 — the diagnostic plug


 PERFORMANCE ORDER

  1. To stop the car, to muffle and again to start the engine.
  2. To check battery tension. If tension lower than 10,5 In to charge the battery.

If at the beginning of a trip the control lamp of ABS burned, and after a while went out again, it means that in the beginning tension of the battery was too low, and then increased thanks to generator charger.

  1. To check that plugs of the battery were reliably tightened and had faultless contact.
  2. To lift the car, to remove forward wheels, to check electric wires of sensors of speed for existence of external damages.
  3. Further check of ABS has to be made in a workshop. The monitor registers the shown malfunctions and writes down them in memory. In the workshops MAZDA it is possible to consider the written-down malfunctions from memory via the diagnostic plug.

Before electrowelding works it is necessary to disconnect the plug from the monitor. To switch-off the plug only at the switched-off ignition.