System Description

SYSTEM DIAGRAM

Component	Description
ECM	ECM
BCM	System Description
ABS actuator and electric unit (control unit)	ABS Actuator and Electric Unit (Control Unit)
Chassis control module	Chassis Control Module
TCM	TCM
Steering angle sensor	Steering Angle Sensor
Combination meter (FULL TFT METER)	Combination Meter
Combination meter (7 INCH INFORMATION DISPLAY)	Combination Meter
Distance sensor	Distance Sensor
Front camera unit	Front Camera Unit
Head Up Display Unit	Head Up Display Unit
ADAS control unit 2	ADAS Control Unit 2

ADAS CONTROL UNIT 2 INPUT/OUTPUT SIGNAL ITEM

Input Signal Item

Transmit unit	Signal name		Description
ECM	CAN communication	Closed throttle position signal	Receives idle position state (ON/OFF)
		Accelerator pedal position signal	Receives accelerator pedal position (angle)
		Engine speed signal	Receives engine speed
BCM	CAN communication	Stop light switch signal	Receives an operational state of the brake pedal
BCM	CAN communication	Brake pedal position switch signal	Receives an operational state of the brake pedal
ABS actuator and electric unit (control unit)	CAN communication	ABS malfunction signal	Receives a malfunction state of ABS
		ABS operation signal	Receives an operational state of ABS
		ABS warning light signal	Receives an ON/OFF state of ABS warning light
		TCS malfunction signal	Receives a malfunction state of TCS
		TCS operation signal	Receives an operational state of TCS
		ASC OFF signal	Receives an ON/OFF state of ASC
		ASC malfunction signal	Receives a malfunction state of ASC
		ASC operation signal	Receives an operational state of ASC
		Vehicle speed signal (ABS)	Receives wheel speeds of four wheels
		Yaw rate signal	Receives yaw rate acting on the vehicle
		Side G sensor signal	Receives lateral G acting on the vehicle
TCM	CAN communication	Input speed signal	Receives the number of revolutions of input shaft
		Current gear position signal	Receives a current gear position
		Shift position signal	Receives a selector lever position
		Output shaft revolution signal	Receives the number of revolutions of output shaft
Steering angle sensor	CAN communication	Steering angle sensor malfunction signal	Receives a malfunction state of steering angle sensor
		Steering angle sensor signal	Receives the number of revolutions, turning direction of the steering wheel
		Steering angle speed signal	Receives the turning angle speed of the steering wheel
Combination meter	CAN communication	System selection signal	Receives a selection state of each item selected with the information display
Distance sensor	CAN communication	Distance sensor signal	Receives detection results, such as the presence or absence of a leading vehicle and distance from the vehicle
Front camera unit	CAN communication	Pedestrian ahead signal	Receives detection results of pedestrian ahead of vehicle
Front camera unit	CAN communication	Vehicle ahead signal	Receives detection results of vehicle ahead

Output Signal Item

Reception unit	Signal name		Description
Combination meter	CAN communication	Meter display signal	Transmits a signal to display a state of the system on the information display
		Buzzer output signal	Transmits a signal to activate buzzer
		AEB warning light signal	Transmits a signal to turn ON the light
Distance sensor	CAN communication	Vehicle speed signal	Transmits a vehicle speed calculated by the ADAS control unit 2
Distance sensor	CAN communication	Steering angle sensor signal	Transmits a steering angle sensor signal received from the steering angle sensor
ABS actuator and electric unit (control unit) (via chassis control module)	CAN communication	Brake fluid pressure control signal	Transmits a brake fluid pressure control signal to activates the brake
BCM	CAN communication	Stop light request signal	Transmits a signal to activates the stop light
ECM	CAN communication	Wheel torque request signal	Transmits a signal to control the engine torque
Head Up Display unit	CAN communication	Display signal	Transmits a signal to display a state of the system on the Head Up Display

FUNCTION DESCRIPTION

The AEB system measures the distance from a vehicle ahead using the distance sensor installed in the front grill and front camera unit installed in the windshield glass.
The AEB system detects a pedestrian using the front camera unit installed in the windshield glass.
When the system judges that a vehicle or pedestrian is being approached, warning indicators are displayed on the information display and at the same time a warning chime sounds, and the brake is operated.
When it is further judged that the vehicle or pedestrian may collide with the vehicle ahead, the system operates the brake strongly to avoid collision while warning indicators are displayed on the information display and at the same time a warning chime sounds.

	Start of warning and partial brake		Start of harder brake
	Applies partial braking		Harder brake

Situation		Brake	Warning
No obstacle approached		No operation	—
	Start of warning and partial brake	Partial brake	Sounds the buzzer Indicates warning indicators on the information display
	Start of harder brake	Harder brake	Sounds the buzzer (Higher pitched buzzer) Indicates warning indicators on the information display

caution

It is the driver′s responsibility to stay alert, drive safely and be in control of the vehicle at all times. As there is a performance limit, it may not provide a warning or brake in certain conditions.

OPERATION DESCRIPTION

The distance sensor measures the distance from the vehicle ahead and transmits the distance sensor signal to the ADAS control unit 2.
The front camera unit measures the distance from a pedestrian and transmits the pedestrian ahead signal to ADAS control unit 2.
The ADAS control unit 2 judges the possibility of a collision from the distance sensor signal, the pedestrian ahead signal and the vehicle speed.
The ADAS control unit 2 performs the following operations according to the degree of possibility of a collision.
- Transmits the buzzer output signal to the combination meter and sounds the buzzer.
- Transmits the meter display signal to the combination meter and displays a state of the system on the information display.
- 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 the BCM and turns ON the stop light.

note

ON/OFF of AEB system is performed with the information display.
When the ignition switch is turned from OFF to ON, the system is automatically activated even if it is OFF.
The AEB system operates under the following conditions.
- The AEB system will function when the vehicle is driven at speeds of approximately 5 km/h (3 MPH) and above, and when the vehicle′s speed is approximately 5 km/h (3 MPH) faster than that of the vehicle ahead. (For vehicle)

OPERATION CONDITION

ADAS control unit 2 performs the control when the following conditions are satisfied.

AEB system: ON
Vehicle speed (For vehicle): Approximately 5 km/h (3 MPH) or more
Vehicle speed (For pedestrian): Approximately 10 – 60 km/h (5 – 37 MPH)
When there is a possibility of a collision with the vehicle or pedestrian ahead.

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 distance sensor area of the front grill is dirty and the measurement of the distance between the vehicles becomes difficult. (For vehicle)
When the view of ahead is hard is recognized due to dirt around front camera unit of windshield. (For pedestrian)