ANTI-LOCK BRAKE SYSTEM SYSTEM DESCRIPTION

  1. FUNCTION DESCRIPTION

    1. Anti-lock Brake System (ABS)

      1. The ABS helps prevent the wheels from locking when the brakes are applied firmly or when braking on a slippery surface.

    2. Electronic Brake Force Distribution (EBD)

      1. EBD control utilizes the ABS, realizing proper brake force distribution between the front and rear wheels in accordance with the driving conditions. In addition, during braking while cornering, it also controls the brake forces of the right and left wheels, helping maintain vehicle stability.

    3. Emergency Brake Signal

      1. In the case of emergency braking, the emergency brake signal flashes the hazard warning lights to alert the drivers in following vehicles.

  2. FUNCTION OF COMPONENTS

    Component

    Function

    Brake Actuator Assembly

    Skid Control ECU

    Judges the vehicle driving condition based on the signals from each sensor and switch, and sends the brake control signals to the brake actuator assembly.

    Pump Motor

    Drives the pumps inside the brake actuator assembly.

    Solenoid Valves

    • The hydraulic circuit has 4 pressure holding solenoid valves and 4 pressure reduction solenoid valves.

    • Change the fluid path based on the signals from the skid control ECU during the operation of the brake control system functions, in order to control the fluid pressure applied to the wheel cylinders.

    Skid Control ECU

    ABS Motor Relay

    Supplies power to the pump motor.

    ABS Solenoid Relay

    Supplies power to the solenoid valves.

    Speed Sensors

    Detect the wheel speed of each of the 4 wheels.

    Stop Light Switch Assembly

    Detects the brake pedal depressing signal.

    Parking Brake Switch Assembly

    Detects when the parking brake lever is pulled up.

    ECM

    Sends the throttle position signal, accelerator pedal position signal and engine speed signal to the skid control ECU.

    Combination Meter Assembly

    ABS Warning Light

    Illuminates to alert the driver when the skid control ECU detects a malfunction in the ABS.

    Brake Warning Light

    • Illuminates to alert the driver when the skid control ECU detects a malfunction in the EBD or brake system.

    • Illuminates to alert the driver when the brake fluid level is low.

    • Illuminates to inform the driver when the parking brake is operated.

    Brake Master Cylinder Reservoir Assembly

    Brake Fluid Level Warning Switch

    Detects the brake fluid level.