Lane Departure Prevention (LDP) System

LANE DEPARTURE PREVENTION (LDP) SYSTEM

System Diagram






System Description

OUTLINE
- Lane Departure Prevention (LDP) system provides a lane departure warning and brake control assistance when the vehicle is driven at speeds of approximately 72 km/h (45 MPH) or more.
- When the vehicle approaches either the left or the right side of the traveling lane, a warning sounds and the lane departure warning lamp (yellow) on the combination meter blinks to alert the driver.
- Then, the LDP system automatically applies the brakes for a short period of time to help assist the driver to return the vehicle to the center of the traveling lane.
- The warning and assist functions stop when the vehicle returns to a position inside of the lane marker.






BASIC OPERATIONS












LDP SYSTEM CONTROL DESCRIPTION
- LDP system is controlled by lane camera unit and LDP controller [ABS actuator and electric unit (control unit)].

NOTE: LDP controller is integrated in the ABS actuator and electric unit (control unit).

- Lane camera unit monitors lane markers of the traveling lane. It transmits the detected lane condition signal to ABS actuator and electric unit (control unit) via CAN communication.
- ABS actuator and electric unit (control unit) detects vehicle conditions depending on each signal.
- Combination meter turns the lane departure warning lamp and LDP ON indicator lamp ON/OFF according to the signals from the lane camera unit via CAN communication (through unified meter and A/C amp.).
- When ABS actuator and electric unit (control unit) judges vehicle deviation from the traveling lane, it controls following actions.
- Requests warning to the lane camera unit via CAN communication to alert the driver. And then lane camera unit controls the lane departure warning buzzer and it requests the lane departure warning lamp activation to combination meter.
- Calculates the necessary yaw moment. And then it controls the brake pressure of each wheel individually to generate the intended movement.

LDP OPERATING CONDITION
- LDP ON indicator lamp: ON

NOTE: LDW ON indicator is OFF.

- Vehicle speed: approximately 72 km/h (45 MPH) or more

NOTE: For details of LDP system operating conditions, refer to normal operating condition CCS-189, "Description". Normal Operating Condition






SIGNAL INPUT/OUTPUT BY CAN COMMUNICATION
The lane camera unit and ABS actuator and electric unit (control unit) transmit/receive each signals via CAN communication. They also detect the vehicle conditions necessary for LDP control.






Component Description