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System Description
 
 
SYSTEM DIAGRAM
ComponentDescription
ABS actuator and electric unit (control unit)ABS Actuator and Electric Unit (Control Unit)
Combination meter (FULL TFT METER)Combination Meter
Combination meter (7 INCH INFORMATION DISPLAY)Combination Meter
Distance sensorDistance Sensor
Head Up Display unitHead Up Display Unit
ADAS control unit 2ADAS Control Unit 2
 
 
ADAS CONTROL UNIT 2 INPUT/OUTPUT SIGNAL ITEM
 
 
Input Signal Item
Transmit unitSignal nameDescription
ABS actuator and electric unit (control unit)CAN communicationVehicle speed signal (ABS)Receives wheel speeds of four wheels
Combination meterCAN communicationSystem selection signalReceives a selection state of each item in “Driving Assistance” selected with vehicle information display
Distance sensorCAN communicationDistance sensor signalReceives detection results, such as the presence or absence of a leading vehicle and distance from the vehicle
 
 
Output Signal Item
Reception unitSignal nameDescription
Combination meterCAN communicationMeter display signalTransmits a signal to display a state of the system on the information display
Buzzer output signalTransmits a signal to activate buzzer
Distance sensorCAN communicationVehicle speed signalTransmits a vehicle speed calculated by the ADAS control unit 2
Head Up Display unitCAN communicationDisplay signalTransmits a signal to display a state of the system on the Head Up Display unit
 
 
FUNCTION DESCRIPTION
  • The Predictive Forward Collision Warning(PFCW) system will function when the vehicle is driven at speeds of approximately 5 km/h (3 MPH) and above.
  • The Predictive Forward Collision Warning(PFCW) system alerts the driver by the vehicle ahead detection indicator and chime when the distance between own vehicle and a vehicle in front of the vehicle ahead becomes closer.
 
 
OPERATION DESCRIPTION
The distance from the vehicle in front of the vehicle ahead and a relative speed are calculated by using the distance sensor and an distance sensor signal is transmitted to the ADAS control unit 2 via CAN communication. When judging the necessity of warning according to the received distance sensor signal, the ADAS control unit 2 transmits a meter display signal and a buzzer output signal to the combination meter via CAN communication.
 
 
OPERATION CONDITION
ADAS control unit 2 performs the control when the following conditions are satisfied.
  • PFCW system: ON
  • Vehicle speed: Approximately 5 km/h (3 MPH) and above.
  • Vehicle in front of the vehicle ahead: Detected.
note
  • ON/OFF of PFCW system is performed with the information display.
 
 
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 distance sensor picks up interference from another radar source and making it impossible to detect a vehicle ahead.
  • When the distance sensor area of the front grill is dirty and the measurement of the distance between the vehicles becomes difficult.