LANE DEPARTURE ALERT SYSTEM SYSTEM DESCRIPTION

  1. LANE DEPARTURE ALERT SYSTEM DESCRIPTION

    1. When driving on roads with white (or yellow) lines, when the system determines that the vehicle may deviate from the current driving lane, it informs the driver of the potential deviation with a buzzer and a display on the combination meter assembly.

    2. The system is equipped with a last memory function, which stores the switch condition when the engine stops and allows the system to begin in that condition when the engine is started again.

  2. FUNCTION OF COMPONENTS

    Component

    Function

    Pre-collision City Sensor

    • Acquires information about the road ahead from a monocular camera and controls the lane departure alert system.

    • Sends signals to display information on the multi-information display in the combination meter, illuminates the lane departure alert indicator light and sounds the meter buzzer based on lane departure alert system control information.

    • Determines the condition of the lane departure alert switch.

    Lane Departure Alert Switch

    Turn the lane departure alert system on/off.

    Combination Meter Assembly

    • Illuminates or turns off in accordance with signals from the pre-collision city sensor.

    • Displays a white lines to inform or warn the driver of the system condition in accordance with signals from the pre-collision city sensor.

    • Illuminates to warn the driver in accordance with signals from the pre-collision city sensor.

    • Sends the meter tolerance values and turn signal condition to the pre-collision city sensor.

    • Sounds to warn the driver of the system condition in accordance with signals from the pre-collision city sensor.

    Brake Actuator Assembly (Skid Control ECU)

    Sends the wheel speed signals to the pre-collision city sensor.

    Spiral Cable Sub-assembly (Steering Angle Sensor)

    Detects the steering angle and steering direction.

    Airbag Sensor Assembly (Yaw Rate and Acceleration Sensor)

    Detects the yaw rate and acceleration of the vehicle and transmits signals to the pre-collision city sensor.

  3. LANE DEPARTURE ALERT SYSTEM CONTROL

    1. Lane departure alert system start-up conditions

      1. The lane departure alert system function operates when the following conditions are met.

        System Start-up Conditions

        Lane departure alert switch ON

        Vehicle speed within operating range for lane departure alert system

        Lane recognized

        Turn signals not being operated

        No system malfunctions detected

    2. Lane departure alert system operation conditions

      1. The lane departure alert system operates while the vehicle is in the following conditions.

        System Operation Conditions

        Operating speed

        Approximately 50 km/h (32 mph) or more

        Operating lane width

        Approximately 3.0 m (9.84 ft.) or more

        Operating radius

        On a straight road or slight curve (with a radius of approximately 150 m (492 ft.) or more)

    3. Temporary function cancellation during lane departure alert system operation

      1. The lane departure alert system is temporarily canceled when the following conditions (cancellation conditions) are detected.

      2. The lane departure alert system restarts when the following conditions (recovery conditions) are met.

        Cancellation Conditions

        Recovery Conditions

        Vehicle speed outside operating range for lane departure alert system

        Vehicle speed within operating range for lane departure alert system

        Turn signals being operated

        Turn signals not being operated

        Lane not recognized

        Lane recognized

        Immediately after lane departure alert sounds

        In-lane driving recognized several seconds after lane departure alert operates

    4. Lane departure alert system stop/restart

      1. The lane departure alert system stops when the following conditions (stop conditions) are detected.

      2. The lane departure alert system restarts when the following conditions (restart conditions) are met.

        Stop Conditions

        Restart Condition

        Lane departure alert switch OFF

        Lane departure alert switch ON

        Lane departure alert system temporarily canceled

        Normal condition confirmed

        Lane departure alert system malfunction detected

        • Normal condition confirmed after engine start-up

        • Recovered from communication malfunction between pre-collision city sensor and connected ECU

        • Recovered from other malfunction between pre-collision city sensor and connected ECU
        Tip:

        For the fail-safe of the lane departure alert system

        Click here