Nissan X-Trail 32. Instruction — part 191
BRC-230
< SYSTEM DESCRIPTION >
[FORWARD EMERGENCY BRAKING]
COMPONENT PARTS
Back side of front bumper
JSOIA1637ZZ
No.
Component parts
Function
Steering angle sensor
Steering angle sensor signal is transmitted to distance sensor via CAN
communication.
Combination meter
• Performs the following operations using the signals received from the
distance sensor via the CAN communication
- Description: Displays the FEB operation status
- System display and warning:
BRC-238, "Menu Displayed by Pressing
MWI-7, "METER SYSTEM : Component Parts Location"
for
detailed installation location.
Stop lamp switch
Stop lamp switch is installed at the upper part of the brake pedal and
detects a brake operation performed by the driver.
TCM
• CVT control related signal is transmitted to distance sensor via CAN
communication.
• Refer to
TM-235, "CVT CONTROL SYSTEM : Component Parts Lo-
for detailed installation location. (Gasoline engine models)
• Refer to
TM-466, "CVT CONTROL SYSTEM : Component Parts Lo-
for detailed installation location. (Diesel engine models)
ECM
• When Forward Emergency Braking operates, an engine torque down
request signal is received from the distance sensor.
• Refer to
EC-28, "ENGINE CONTROL SYSTEM : Component Parts
for detailed installation location. (MR20DD engine models)
• Refer to
EC-440, "Component Parts Location"
for detailed installa-
tion location. (QR25DE engine models)
• Refer to
EC-812, "Component Parts Location"
for detailed installation
location. (R9M engine models)
ABS actuator and electric unit (control unit)
• Vehicle speed signal and the operation statuses of the VDC, TCS and
ABS systems, etc. are transmitted to the distance sensor via CAN
communication.
• Refer to
BRC-14, "Component Parts Location"
location.
COMPONENT PARTS
BRC-231
< SYSTEM DESCRIPTION >
[FORWARD EMERGENCY BRAKING]
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BRC
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Distance Sensor
INFOID:0000000010727967
• Distance sensor is installed on the back of the front bumper and
detects a vehicle ahead by using millimeter waves.
• Distance sensor detects radar reflected from a vehicle ahead by
irradiating radar forward and calculates a distance from the vehicle
ahead and relative speed, based on the detected signal.
• When judging the danger of crash according to the distance from
the vehicle ahead and the relative speed, the distance sensor
transmits a signal to ABS actuator and electric unit (control unit).
Stop Lamp Switch
INFOID:0000000010727968
• Stop lamp switch is installed at the upper part of the brake pedal
and detects a brake operation performed by the driver.
• Stop lamp switch is turned ON, when depressing the brake pedal.
• Stop lamp switch signal is input to BCM. Stop lamp switch signals
are transmitted from BCM to distance sensor via CAN communica-
tion.
BCM
• Stop lamp switch signal is transmitted to the distance sensor via CAN
communication.
• Refer to
BCS-6, "BODY CONTROL SYSTEM : Component Parts Lo-
for detailed installation location.
Chassis control unit
• Brake fluid pressure control signal is received from distance sensor
via chassis communication.
• Brake fluid pressure control signal is transmitted to ABS actuator
electric unit (control unit) via CAN communication.
• Refer to
DAS-166, "Component Parts Location"
for detailed installa-
tion location.
Sonar control unit
• While Forward Emergency Braking is operating, when the system
wants to recommend an operation to the driver, and when the system
is canceled, a buzzer sounds due to a sonar output request from the
distance sensor.
• Refer to
SN-8, "Component Parts Location"
for detailed installation
location. (With Park Assist)
• Refer to
SN-119, "Component Parts Location"
for detailed installation
location. (Without Park Assist)
Distance sensor
Distance sensor detects radar reflected from a vehicle ahead by irradi-
ating radar forward and calculates a distance from the vehicle ahead
and relative speed, based on the detected signal.
No.
Component parts
Function
JSOIA1619ZZ
JSOIA0439ZZ
BRC-232
< SYSTEM DESCRIPTION >
[FORWARD EMERGENCY BRAKING]
SYSTEM
SYSTEM
System Description
INFOID:0000000010721664
SYSTEM DIAGRAM
DISTANCE SENSOR INPUT/OUTPUT SIGNAL ITEM
Input Signal Item
JSOIA1621GB
Transmit unit
Signal name
Description
ECM
CAN com-
munica-
tion
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
TCM
CAN com-
munica-
tion
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
BCM
CAN com-
munica-
tion
Stop lamp switch signal
Receives an operational state of the brake pedal
SYSTEM
BRC-233
< SYSTEM DESCRIPTION >
[FORWARD EMERGENCY BRAKING]
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Output Signal Item
DESCRIPTION
• Forward emergency braking (FEB) system can assist the driver when there is a risk of a forward collision
with the vehicle ahead in the traveling lane.
• FEB system operate at speeds above approximately 5km/h (3 MPH).
FUNCTION DESCRIPTION
• The FEB system uses a distance sensor to measure the distance to the vehicle ahead in the traveling lane.
• If there is a risk of a collision, FEB issues a visual and audible warning signal to the combination meter via
CAN communication.
• If the driver does not take action, FEB issues the second visual and audible warning.
• And if the risk of a collision becomes imminent, FEB system applies braking command to ABS actuator and
electric unit (control unit) via CAN communication.
FEB Operating Condition
• FEB setting is ON (FEB warning lamp OFF)
• Vehicle speed: Approximately 5km/h and above
ABS actuator
and electric unit
(control unit)
CAN com-
munica-
tion
ABS malfunction signal
Receives a malfunction state of ABS
ABS operation signal
Receives an operational state of ABS
ABS warning lamp signal
Receives an ON/OFF state of ABS warning lamp
TCS malfunction signal
Receives a malfunction state of TCS
TCS operation signal
Receives an operational state of TCS
VDC OFF switch signal
Receives an ON/OFF state of VDC
VDC malfunction signal
Receives a malfunction state of VDC
VDC operation signal
Receives an operational state of VDC
Vehicle speed signal (ABS)
Receives wheel speeds of four wheels
Yaw rate signal
Receives yaw rate acting on the vehicle
Steering angle
sensor
CAN com-
munica-
tion
Steering angle sensor signal
Receives the number of revolutions, turning direction,
turning angle speed of the steering wheel
Combination
meter
CAN com-
munica-
tion
System selection signal
Receives a selection state of Forward Emergency
Brake
Stop lamp
switch
Stop lamp switch signal
Transmits a operational state of the brake pedal to the
BCM
Transmit unit
Signal name
Description
Reception unit
Signal name
Description
ECM
CAN commu-
nication
Engine torque down request signal
Transmits a signal to control the engine torque.
ABS actuator
and electric
unit (control
unit)
CAN commu-
nication
Brake fluid pressure control signal
Transmits a brake fluid pressure control signal to acti-
vates the brake via chassis control module
Combination
meter
CAN commu-
nication
Meter display
signal
Vehicle ahead detection
indicator signal
Transmits a signal to display a state of the system on the
information display via front camera unit
FEB system display sig-
nal
FEB warning signal
FEB warning lamp signal
Transmits a signal to illuminate the FEB warning lamp
BCM
CAN commu-
nication
Stop lamp drive signal
Transmits a signal to active the stop lamp.
Sonar control
unit
CAN commu-
nication
Buzzer drive signal
Transmits a buzzer signal to active the buzzer
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