Note: the features of starting the engine on models with the ABS system with a completely discharged battery are given in the subsection "Starting with a booster battery" chapters "Manual".
Description of anti-lock braking system (ABS)
1. Anti-lock brake system (ABS) controls the pressure in the brake circuits of all four wheels, preventing the wheels from blocking.
ABS allows:
- with a high degree of confidence to go around the obstacle, even in the event of emergency braking;
- stop the car during emergency braking while maintaining controllability and stability on the road, even with a curved trajectory.
2. The main function of the ABS system is to ensure vehicle stability and controllability. However, the system cannot prevent the vehicle from skidding if the cornering speed limit is exceeded.
3. The ABS system consists of a hydraulic unit, an ABS electronic control unit, a brake master cylinder with a vacuum booster, wheel speed sensors, a relay and an indicator "ABS".
4. Receiving signals from all sensors during braking, the electronic control unit determines which of the wheels is on the verge of blocking. At this moment, the electronic control unit actuates the corresponding solenoid valve in the hydraulic unit to provide the required pressure in the brake circuit of the corresponding wheel.
5. The electronic control unit has the functions of self-diagnosis and emergency operation. If a malfunction is detected, the indicator on the instrument cluster lights up "ABS", and the corresponding fault code is entered into the memory of the control unit, then the system goes into emergency mode (disabling the ABS system).
6. Anti-lock brake system (ABS) turns on when the vehicle speed is more than 10 km/h and turns off when the speed is less than 5 km/h.