LANE DEPARTURE ALERT SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Components Function
    Combination Meter Assembly Multi-information Display LDA Indicator Illuminates or turns off in accordance with signals from the pre-crash safety city sensor.
    Multi-information Display Displays a warning message and white lines to inform or warn the driver of the system condition in accordance with signals from the pre-crash safety city sensor.
    Buzzer Sounds to warn the driver of the system condition in accordance with signals from the pre-crash safety city sensor.
    Pre-crash Safety City Sensor
    • Captures a view of the road ahead of the vehicle and detects lane markers on the driving lane, and calculates the radius to the center of the lane, lane width, distance from markers and heading angle deviation.

    • Controls the lane departure alert system.

    • Transmits the indicator illumination request signal, multi-information display indication request signal and buzzer sound request signal to the combination meter assembly.

    Spiral Cable with Sensor Sub-assembly Steering Sensor Detects the steering direction and angle of the steering wheel.
    Brake Booster with Master Cylinder Assembly Skid Control ECU Sends a vehicle speed signal from the speed sensor to the pre-crash safety city sensor.
    Steering Pad Switch Assembly Lane Departure Alert Switch Detects an on/off status of the system and transmits a signal to the pre-crash safety city sensor.
    Airbag Sensor Assembly Yawrate Sensor Detects yaw rate and transmits a signal to the pre-crash safety city sensor.
    Main Body ECU (Multiplex Network Body ECU) Sends country specification information signals to the pre-crash safety city sensor.
    Speed Sensor Transmits a vehicle speed signal to the skid control ECU.
  2. SYSTEM CONTROL


    1. Operating Conditions of Lane Departure Alert System

      Operation Condition
      Operating/Resume

      The lane departure alert system is activated when all of the following conditions are met:


      • The lane departure alert switch is on. (When the lane departure alert switch is pressed to turn on the lane departure alert system, the LDA indicator illuminates.)

      • The vehicle speed is approximately 50 km/h (32 mph) or more.

      • Lane markers are detected.

      • No turn signal command is detected.

      • System malfunction is not detected.

      Suspended

      The lane departure alert system is suspended when any one of the following conditions is met:


      • The vehicle speed is less than approximately 50 km/h (32 mph) .

      • A turn signal command is detected.

      • No lane markers are detected.

      • Immediately after the lane departure warning is activated.

      • The temperature of the pre-crash safety city sensor is abnormal.

      Canceled

      The lane departure alert system is stopped when any one of the following conditions is met:


      • The lane departure alert switch is off.

      • The lane departure alert system is malfunctioning.

      The lane departure alert system resumes when the following conditions are met:


      • The conditions to start operation listed above are satisfied.

      • The lane departure alert system condition returns to normal.

      • The power switch is turned off and on (IG) again to ensure normal operation, after the lane departure alert system has been stopped by a system malfunction.

  3. FUNCTION


    1. Lane Departure Alert System Sensitivity Setting


      1. Using the lane departure alert system sensitivity setting screen on the multi-information display in the combination meter assembly, the lane departure alert system sensitivity can be switched between HIGH and NORMAL. The sensitivity mode should be switched by setting the customized tab using the meter control switches

      2. When the sensitivity is set to HIGH, the lane departure alert warns the driver earlier than when set to NORMAL.

        A01KE4XC02
        *a Normal Sensitivity *b High Sensitivity
  4. DIAGNOSIS


    1. If a malfunction is detected in the lane departure alert system, the pre-crash safety city sensor cancels the lane departure alert system, turns off the LDA indicator, illuminates the master warning light, sounds the buzzer in the combination meter assembly, and displays a message on the multi-information display to inform the driver of the malfunction.

    2. At the same time, the malfunction is stored in memory as a Diagnostic Trouble Code (DTC). When a Global TechStream (GTS) is connected to the DLC3, the DTC can be read. For details, refer to the Repair Manual.