2019 NISSAN LEAF brake sensor

To reset at a slower cruising speed, use one
of the following three methods:
1. Lightly tap the brake pedal. When thevehicle attains the desired speed, push
the SET- switch and release it.
2. Push and hold the SET- switch. Release the switch when the vehicle slows down
to the desired speed.
3. Push, then quickly release the SET- switch. Each time you do this, the set
speed will decrease by about 1 mph
(1.6 km/h).
To resume the preset speed, push and re-
lease the RES+ switch. The vehicle will re-
sume the last set cruising speed when the
vehicle speed is over 25 mph (40 km/h).
WARNING
Failure to follow the warnings and in-
structions for proper use of the AEB
system could result in serious injury or
death.
• The AEB system is a supplemental aid to the driver. It is not a replace-
ment for the driver’s attention to
traffic conditions or responsibility to
drive safely. It cannot prevent acci-
dents due to carelessness or dan-
gerous driving techniques.
• The AEB system does not function in all driving, traffic, weather and road
conditions. The AEB system can assist the driver when
there is a risk of a forward collision with the
vehicle ahead in the traveling lane.
The AEB system uses a radar sensor
A
located on the front of the vehicle to mea-
sure the distance to the vehicle ahead in
the same lane.
AUTOMATIC EMERGENCY BRAKING
(AEB) (IF SO EQUIPPED)
5-112Starting and driving

1. Press thebutton until “Settings” dis-
plays in the vehicle information display.
Use the
button to select “Driver
Assistance.” Then press the OK button.
2. Select “Emergency Brake” and press the OK button.
3. Select “System” and use the OK button to turn the system on or off.
When the AEB system is turned off, the AEB
system warning light illuminates.
NOTE:
The AEB system will be automatically
turned on when the EV system is restarted.
AEB SYSTEM LIMITATIONS
WARNING
Listed below are the system limita-
tions for the AEB system. Failure to op-
erate the vehicle in accordance with
these system limitations could result
in serious injury or death.
• The AEB system cannot detect all vehicles under all conditions.
• The radar sensor does not detect the following objects: – Pedestrians, animals or obstacles
in the roadway.
– Oncoming vehicles.
– Crossing vehicles.
• The radar sensor has some perfor- mance limitations. If a stationary ve-
hicle is in the vehicles’s path, the AEB
system will not function when the
vehicle is driven at speeds over ap-
proximately 50 mph (80 km/h).
•
The radar sensor may not detect a ve-
hicle ahead in the following conditions:
– Dirt, ice, snow or other material covering the radar sensor.
–
Interference by other radar sources.– Snow or road spray from traveling vehicles.
– If the vehicle ahead is narrow (e.g. motorcycle).
– When driving on a steep downhill slope or roads with sharp curves.
• In some road or traffic conditions, the AEB system may unexpectedly
apply partial braking. When accel-
eration is necessary, continue to de-
press the accelerator pedal to over-
ride the system.
• Braking distances increase on slip- pery surfaces. • The system is designed to automati-
cally check the sensor’s functional-
ity, within certain limitations. The
system may not detect some forms
of obstructions of the sensor area
such as ice, snow, stickers, etc. In
these cases, the system may not be
able to worn the driver properly. Be
sure that you check, clean and clear
the sensor area regularly.
• Excessive noise will interfere with the warning chime sound, and the
chime may not be heard.
• The AEB system may react to a per- son on a bicycle, detecting as a pe-
destrian.
• The AEB system may operate under the following conditions, detecting
the possibility of a forward collision:
– A vehicle or a person is on theroadside at the beginning of a
curve.
– A pedestrian approaches the driv- ing lane in front of the vehicle.
Starting and driving5-115

Self-test feature
The Anti-lock Braking System (ABS) in-
cludes electronic sensors, electric pumps,
hydraulic solenoids and a computer. The
computer has a built-in diagnostic feature
that tests the system each time you push
the power switch in the READY to drive po-
sition and move the vehicle at a low speed
in forward or reverse. When the self-test
occurs, you may hear a “clunk” noise
and/or feel a pulsation in the brake pedal.
This is normal and does not indicate a mal-
function. If the computer senses a mal-
function, it switches the ABS off and illumi-
nates the ABS warning light on the
instrument panel. The brake system then
operates normally, but without anti-lock
assistance.
If the ABS warning light illuminates during
the self-test or while driving, have the ve-
hicle checked. It is recommended that you
visit a NISSAN certified LEAF dealer for this
service.
Normal operation
The Anti-lock Braking System (ABS) oper-
ates at speeds above 3 to 6 mph (5 to
10 km/h). The speed varies according to
road conditions.
When the ABS senses that one or more
wheels are close to locking up, the actuator
rapidly applies and releases hydraulic pres-
sure. This action is similar to pumping the
brakes very quickly. You may feel a pulsa-
tion in the brake pedal and hear a noise
from under the hood or feel a vibration
from the actuator when it is operating. This
is normal and indicates that the ABS is op-
erating properly. However, the pulsation
may indicate that road conditions are haz-
ardous and extra care is required while
driving.
BRAKE ASSIST
When the force applied to the brake pedal
exceeds a certain level, the Brake Assist is
activated generating greater braking force
than a conventional brake booster even
with light pedal force.
WARNING
The Brake Assist is only an aid to assist
braking operation and is not a collision
warning or avoidance device. It is the
drivers responsibility to stay alert,
drive safely and be in control of the
vehicle at all times.
Starting and driving5-149

The VDC system uses various sensors to
monitor driver inputs and vehicle motion.
Under certain driving conditions, the VDC
system helps to perform the following
functions.
• Controls brake pressure to reduce wheelslip on one slipping drive wheel so power
is transferred to a drive wheel on the same
axle that is not slipping.
• Controls brake pressure and traction mo- tor output to reduce drive wheel slip
based on vehicle speed (traction control
function).
• Controls brake pressure at individual wheels and traction motor output to help
the driver maintain control of the vehicle
in the following conditions:
• Understeer (vehicle tends to not follow the steered path despite increased steering
input).
• Oversteer (vehicle tends to spin due to certain road or driving conditions).
The VDC system can help the driver main-
tain control of the vehicle, but it cannot
prevent loss of vehicle control in all driving
situations. When the VDC system operates, the
indicator light in the instrument panel
flashes. When the indicator light flashes,
note the following items:
• The road may be slippery or the system
may determine some action is required to
help keep the vehicle on the steered path.
• You may feel a pulsation in the brake pedal and hear a noise or vibration from under
the hood. This is normal and indicates
that the VDC system is working properly.
• Adjust your speed and driving according to the road conditions.
For additional information, refer to “Slip in-
dicator light” and “Vehicle Dynamic Control
(VDC) OFF indicator light” in the “Instru-
ments and controls” section of this manual.
If a malfunction occurs in the system, the
indicator light illuminates in the ve-
hicle information display. The VDC system
automatically turns off when this indicator
light is lit. The vehicle information display is used to
turn off the VDC system. The VDC OFF indi-
cator light
illuminates to indicate that
the VDC system is off. When the vehicle
information display is used to turn off the
system, the VDC system still operates to
prevent one drive wheel from slipping by
transferring power to a non-slipping wheel.
The
indicator light flashes if this oc-
curs. All other VDC functions are off and the
indicator light will not flash. The VDC
system is automatically reset to on when
the power switch is placed in the OFF posi-
tion then back to the ON position. For addi-
tional information, refer to “Vehicle infor-
mation display” in the “Instruments and
controls” section of this manual.
The computer has a built-in diagnostic fea-
ture that tests the system each time you
start the EV and move the vehicle forward
or in reverse at a slow speed. When the
self-test occurs, you may hear a “clunk”
noise and/or feel a pulsation in the brake
pedal. This is normal and is not an indica-
tion of a malfunction.
VEHICLE DYNAMIC CONTROL (VDC)
SYSTEM
5-150Starting and driving