Nissan Ariya: System Description

• Component Parts. Rear Automatic Braking System
• System
• Operation

Component Parts. Rear Automatic Braking System

Component Parts Location

	ADAS control unit 2 Refer to Component Parts Location for detailed installation location.		BCM Refer to Component Parts Location for detailed installation location.		VCM Refer to Component Parts Location or detailed installation location.
	ABS actuator and electric unit (control unit) Refer to Component Parts Location for detailed installation location.		Chassis control module Refer to Component Parts Location for detailed installation location.		Combination meter Refer to Component Parts Location for detailed installation location.
	Steering angle sensor Refer to Component Parts Location for detailed installation location.		Around view monitor control unit Refer to Component Parts Location for detailed installation location.		Sonar control unit Refer to Component Parts Location for detailed installation location.

System

System Description

SYSTEM DIAGRAM

ADAS CONTROL UNIT 2 INPUT/OUTPUT SIGNAL ITEM

Input Signal Item

Output Signal Item

FUNCTION DESCRIPTION

• The Rear Automatic Braking system can assist the driver when the vehicle is backing up and approaching objects directly behind the Nissan Ariya vehicle.

  

• When the shift lever is in the R (Reverse) position and the Nissan Ariya vehicle speed is less than approximately 3 and 15 km/h (2 and 9 MPH), the RAB system operates.

• The RAB system detects obstacles behind the Nissan Ariya vehicle using the sonar sensors.

• If a risk of a collision with an obstacle is detected when own Nissan Ariya vehicle is backing up, the RAB system warning indicator blinks in the vehicle information display, a red frame appears in the center display (with Intelligent Around View 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.

  • The driver can temporarily cancel the sonar function in the Nissan Ariya vehicle, this will also temporarily cancel the RAB system.

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 buzzer output signal to the combination meter and sounds the buzzer.

  • Transmits the meter display signal to the combination meter and displays the RAB 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 lamp request signal to BCM and turn ON the stop lamp.

NOTE:

• ON/OFF of RAB system is performed with the combination meter.

• The RAB system is automatically turned ON when the EV system is restarted.

OPERATION CONDITION

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

• RAB system: ON

• Vehicle speed: Between approximately 3 and 15 km/h (2 and 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.

Fail-safe (ADAS Control Unit 2)

Refer to Fail-safe (ADAS Control Unit 2).

Warning Lamp/Indicator Lamp

Warning Lamp/Indicator Lamp

Name	Design	Function
RAB warning lamp		The RAB warning lamp warns the driver that RAB system is OFF. The RAB warning lamp warns the driver of a malfunction in the RAB system. For layout, Refer to Design.

Operation

Operation

SWITCH NAME AND FUNCTION

No.	Switch name	Description
	RIGHT SW	Using the steering switch, select the [Settings] menu in the information display Select the [Driver Assistance] menu Select the [Emergency Brake] menu Select the [Rear] item to turn the system ON/OFF
	LEFT/BACK SW
	OK SW/Jog dial

SYSTEM DISPLAY

No.	Switch name	Description
	RAB warning lamp	RAB warning lamp indicates that an malfunction condition is present in RAB system When the RAB system turns OFF, the RAB warning lamp will illuminate.
	RAB indicator	Blinks when there is a possibility of a collision with the object backward

DISPLAY AND WARNING

System Display

Symptom DiagnosisBasic Inspection