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System Description
 
 
SYSTEM DIAGRAM
ComponentDescription
PHEV-ECUGENERAL INFORMATION
ABS actuator and electric unit (control unit)ABS Actuator and Electric Unit (Control Unit)
BCMSystem Description
Steering angle sensorSteering Angle Sensor
Front camera unitFront Camera Unit
ADAS control unit 2ADAS Control Unit 2
Combination meterCombination Meter
Steering vibration motorSteering Vibration Motor
Chassis control moduleChassis Control Module
 
 
ADAS CONTROL UNIT 2 INPUT/OUTPUT SIGNAL ITEM
 
 
Input Signal Item
Transmit unitSignal nameDescription
PHEV-ECUCAN communicationAccelerator pedal position signalReceives accelerator pedal position (angle)
Engine speed signalReceives engine speed
Input speed signalReceives the number of revolutions of input shaft
Current gear position signalReceives a current gear position
Shift position signalReceives a select lever position
Output shaft revolution signalReceives the number of revolutions of output shaft
ABS actuator and electric unit (control unit)CAN communication
ABS malfunction signalReceives a malfunction state of ABS
ABS operation signalReceives an operational state of ABS
TCS malfunction signalReceives a malfunction state of TCS
TCS operation signalReceives an operational state of TCS
ASC OFF signalReceives an ON/OFF state of ESP
ASC malfunction signalReceives a malfunction state of ESP
ASC operation signalReceives an operational state of ESP
Vehicle speed signal (ABS)Receives wheel speeds of four wheels
Yaw rate signalReceives yaw rate acting on the vehicle
Side G sensor signalReceives lateral G acting on the vehicle
Combination meterCAN communicationSystem selection signalReceives a selection state of each item in “Driving Aids” selected with the information display
BCMCAN communicationTurn indicator signalReceives an operational state of the turn signal light and the hazard light
Steering angle sensorCAN communicationSteering angle sensor malfunction signalReceives a malfunction state of steering angle sensor
Steering angle sensor signalReceives the number of revolutions, turning direction of the steering wheel
Steering angle speed signalReceives the turning angle speed of the steering wheel
Front camera unitCAN communicationDetected lane condition signalReceives detection results of lane marker
 
 
Output Signal Item
Reception unitSignal nameDescription
ABS actuator and electric unit (via chassis control module)CAN communicationTarget yaw moment signalTransmits a target yaw moment signal to generate yaw moment to the vehicle
Combination meterCAN communicationMeter display signalTransmits an meter display signal to turn ON the LDP system display
Front camera unitCAN communicationVehicle speed signalTransmits a vehicle speed calculated by ADAS control unit 2
Turn indicator signalTransmits a turn indicator signal received from BCM
Steering vibration motorMotor operation signalActivates a motor operation signal to active the steering vibration motor
 
 
FUNCTION DESCRIPTION
  • Lane Departure Prevention (LDP) system provides a lane departure warning and brake control assistance when the vehicle is driven at speeds of approximately 60 km/h (37 MPH)  or more.
  • When the vehicle approaches either the left or the right side of the traveling lane, a steering vibration activates and the LDP warning display on the information display 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.
  • Warning and brake control are not performed during turn signal operation (lane change side).
  • The warning and assist functions stop when the vehicle returns to a position inside of the lane marker.
 
 
EXAMPLE
When the vehicle approaches the right lane marker, the driver is alerted by the steering vibration and the blinking of LDP indicator. Simultaneously, the left brake is controlled independently to generate force toward the direction to recover the vehicle from the lane departure.
 
 
OPERATION DESCRIPTION
  • When the system is turned ON by dynamic driver assistance switch, ADAS control unit 2 transmits meter display signal to combination meter via CAN communication.
  • Front camera unit monitors lane markers of the traveling lane. It transmits the detected lane condition signal to ADAS control unit 2 via chassis CAN communication.
  • When judging from a lane marker detection signal that the vehicle is approaching the lane marker, ADAS control unit 2 controls the following items.
    • Activates the steering vibration motor by ADAS control unit 2.
    • Transmits a meter display signal to combination meter via CAN communication.
    • Calculates necessary yaw moment to transmit a target yaw moment signal to ABS actuator and electric unit (control unit) via CAN communication
  • When receiving the target yaw moment signal, ABS actuator and electric unit (control unit) controls brake pressure of four wheels, respectively.
  • When receiving the signal from ADAS control unit 2, combination meter turns ON/OFF the LDP system display.
 
 
OPERATION CONDITION
ADAS control unit 2 performs the control when the following conditions are satisfied.
  • LDP system: ON
  • Vehicle speed: approximately 60 km/h (37 MPH) or more
  • Turn indicator signal: After 2 seconds or more from turned OFF
note
  • LDP system ON/OFF can be set on the information display.
  • The LDP system may not function properly, depending on the situation.
 
 
CANCEL CONDITION
The ADAS control unit 2 cancels the operation when the system is under any conditions of the operation cancellation condition.
  • When the system malfunction occurs.
  • When the ASC or ABS (Including the TCS) operates.
  • When the ASC is turned OFF
  • When the SNOW mode GRAVEL mode or MUD mode is selected (AWD models).
  • When the front camera unit becomes high temperature [over approximately 40 °C (104 °F)].