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System Description
 
 
SYSTEM DIAGRAM
ComponentFunction
PHEV-ECUGENERAL INFORMATION
ABS actuator and electric unit (control unit)ABS Actuator and Electric Unit (Control Unit)
Chassis control moduleChassis Control Module
BCMSystem Description
Steering angle sensorSteering Angle Sensor
Combination meterCombination Meter
Sonar control unitSonar Control Unit
Around view monitor control unitAround View Monitor Control Unit
ADAS control unit 2ADAS Control Unit 2
 
 
ADAS CONTROL UNIT 2 INPUT/OUTPUT SIGNAL ITEM
 
 
Input Signal Item
Transmit unitSignal nameDescription
PHEV-ECUCAN communicationClosed throttle position signalReceives idle position state (ON/OFF)
Accelerator 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 selector lever position
Output shaft revolution signalReceives the number of revolutions of output shaft
ABS actuator and electric unit (control unit)CAN communicationABS malfunction signalReceives a malfunction state of ABS
TCS malfunction signalReceives a malfunction state of TCS
ASC malfunction signalReceives a malfunction state of ASC
Vehicle speed signal (ABS)Receives wheel speeds of four wheels
Brake fluid pressure signalReceives brake fluid pressure
BCMCAN communicationStop light switch signalReceives an operational state of the brake pedal
Steering angle sensorCAN communicationSteering angle sensor signalReceives the number of revolutions, turning direction of the steering wheel
Combination meterCAN communicationSystem selection signalReceives a selection state of each item selected with the combination meter
Sonar control unitCAN communicationSonar sensor signalReceives obstacle information (existence & distance)
Front camera unitCAN communicationPedestrian ahead signalReceives detection results of pedestrian ahead of vehicle
Vehicle ahead signalReceives detection results of vehicle ahead
 
 
Output Signal Item
Reception unitSignal nameDescription
PHEV-ECUCAN communicationWheel torque request signalTransmits a signal to control the engine torque
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 tone alarm
Rear AEB warning light signal
  • Transmits a signal to illuminate Rear AEB warning light
  • Transmits an ON/OFF state of the Rear AEB
BCMCAN communicationStop light request signalTransmits a signal to activates the stop light
ABS actuator and electric unit (control unit) (via chassis control module)CAN communicationBrake fluid pressure control signalTransmits a brake fluid pressure control signal to activates the brake
Around view monitor control unitCAN communicationRear AEB warning signalTransmits a Rear AEB warning signal to appear the red frame in the center display
Head Up Display unitCAN communicationDisplay signalTransmits a signal to display a state of the system on the Head Up Display
 
 
FUNCTION DESCRIPTION
  • The Rear Automatic Braking system can assist the driver when the vehicle is backing up and approaching objects directly behind the vehicle.
  • When the shift lever is in the R (Reverse) position and the vehicle speed is less than approximately 15 km/h (7 MPH), the Rear AEB system operates.
  • The Rear AEB system detects obstacles behind the vehicle using the sonar sensors.
  • If a risk of a collision with an obstacle is detected when own vehicle is backing up, the Rear AEB system warning indicator blinks in the vehicle information display, a red frame appears in the center display (with Multi Around Monitor system), and the system chimes three times.
  • The system automatically applies the brakes.
    note
    • After the automatic brake application, the driver must depress the brake pedal to maintain brake pressure.
    • Driver can temporarily cancel the sonar function in the vehicle, but the Rear AEB system continues to operate.
 
 
OPERATION DESCRIPTION
  • Sonar detects a object approaching, and transmits the object detection signal to ADAS control unit 2 via CAN communication.
  • The ADAS control unit 2 performs the following operations according to the degree of possibility of a collision.
    • Transmits the tone alarm output signal to the combination meter and sounds the tone alarm.
    • Transmits the meter display signal to the combination meter and displays the Rear AEB system warning indicator.
    • Transmits the brake fluid pressure control signal to the ABS actuator and electric unit (control unit) and performs the brake control.
    • Transmits the stop light request signal to BCM and turn ON the stop light.
note
  • ON/OFF of Rear AEB system is performed with the combination meter.
  • The Rear AEB system is automatically turned ON when the engine is restarted.
 
 
OPERATION CONDITION
ADAS control unit 2 performs the control when the following conditions are satisfied.
  • Rear AEB system: ON
  • Vehicle speed: Less than approximately 15 km/h (9 MPH)
  • When there is a possibility of a collision with the object backward.
 
 
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 judges that the vehicle comes to a standstill by the system control.
  • When the system malfunction occurs.
  • When the sonar area of the rear bumper is dirty and the measurement of the distance between the object becomes difficult.