brake system NISSAN LEAF 2016 1.G Service Manual

ANTI-LOCK BRAKING SYSTEM
(ABS)
WARNING
• The Anti-lock Braking System (ABS) is a sophisticated device, but it cannot
prevent accidents resulting from care-
less or dangerous driving techniques.
It can help maintain vehicle control
during braking on slippery surfaces.
Remember that stopping distances on
slippery surfaces will be longer than
on normal surfaces even with ABS.
Stopping distances may also be longer
on rough, gravel or snow covered
roads, or if you are using tire chains.
Always maintain a safe distance from
the vehicle in front of you. Ultimately,
the driver is responsible for safety.
• Tire type and condition may also affect braking effectiveness.
– When replacing tires, install thespecified size of tires on all four
wheels.
– For additional information, refer to “Wheels and tires” in the “Mainte-
nance and do-it-yourself” section of
this manual.
The Anti-lock Braking System (ABS) controls the
brakes so the wheels do not lock during hard brak-
ing or when braking on slippery surfaces. The sys-
tem detects the rotation speed at each wheel and
varies the brake fluid pressure to prevent each
wheel from locking and sliding. By preventing each
wheel from locking, the system helps the driver
maintain steering control and helps to minimize
swerving and spinning on slippery surfaces.
Using the system
Depress the brake pedal and hold it down. De-
press the brake pedal with firm steady pressure,
but do not pump the brakes. The ABS will oper-
ate to prevent the wheels from locking up. Steer
the vehicle to avoid obstacles.
WARNING
Do not pump the brake pedal. Doing so
may result in increased stopping dis-
tances.
Self-test feature
The ABS includes 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 position 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
malfunction. If the computer senses a malfunc-
tion, it switches the ABS off and illuminates 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 vehicle
checked by a NISSAN certified LEAF dealer.
Normal operation
The ABS operates 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 pressure. This action is similar to
pumping the brakes very quickly. You may feel a
pulsation 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 operating properly. However, the
pulsation may indicate that road conditions are
hazardous and extra care is required while driving.
5-22Starting and driving

The VDC system uses various sensors to monitor
driver inputs and vehicle motion. Under certain
driving conditions, the VDC system helps to per-
form the following functions.
• Controls brake pressure to reduce wheel slip onone slipping drive wheel so power is transferred
to a drive wheel on the same axle that is not
slipping.
• Controls brake pressure and traction motor out- put 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 in-
put) .
– oversteer (vehicle tends to spin due to cer- tain road or driving conditions) .
The VDC system can help the driver maintain
control of the vehicle, but it cannot prevent loss of
vehicle control in all driving situations.
When the VDC system operates, the
warning in the instrument panel flashes. When
the warning 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 sys-
tem is working properly.
• Adjust your speed and driving according to the road conditions.
For additional information, refer to “Vehicle Dy-
namic Control (VDC) warning light” and “Vehicle
Dynamic Control (VDC) off indicator light” in the
“Instruments and controls” section of this manual.
If a malfunction occurs in the system, the
warning illuminates in the lower display. The VDC
system automatically turns off when this warning
light is lit.
The VDC OFF switch is used to turn off the VDC
system. The VDC off indicator
illuminates
to indicate that the VDC system is off. When the
VDC switch 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
flashes if this
occurs. All other VDC functions are off and the
warning will not flash. The VDC System is
automatically reset to ON when the power switch is placed in the OFF position then back to the ON
position.
The computer has a built-in diagnostic feature
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.
WARNING
• The VDC system is designed to help the driver maintain stability but does
not prevent accidents due to abrupt
steering operation at high speeds or
by careless or dangerous driving tech-
niques. Reduce vehicle speed and be
especially careful when driving and
cornering on slippery surfaces and al-
ways drive carefully.
VEHICLE DYNAMIC CONTROL (VDC)
SYSTEM
Starting and driving5-23

• Do not modify the vehicle’s suspen-sion. If suspension parts such as shock
absorbers, struts, springs, stabilizer
bars, bushings and wheels are not
NISSAN recommended for your ve-
hicle or are extremely deteriorated the
VDC system may not operate properly.
This could adversely affect vehicle
handling performance, and the
warning may flash ormay
illuminate.
• If brake related parts such as brake
pads, rotors and calipers are not
NISSAN recommended or are ex-
tremely deteriorated, the VDC system
may not operate properly and
may
illuminate.
• If traction motor control related parts
are not NISSAN recommended or are
extremely deteriorated, the
may
illuminate.
• When driving on extremely inclined
surfaces such as higher banked cor-
ners, the VDC system may not operate
properly and the
warning may illu-
minate. Do not drive on these types of
roads. • When driving on an unstable surface
such as a turntable, ferry, elevator or
ramp, the
warning may illuminate.
This is not a malfunction. Restart the
EV (Electric Vehicle) system after driv-
ing onto a stable surface.
• If wheels or tires other than the
NISSAN recommended ones are used,
the VDC system may not operate prop-
erly and the
warning may illumi-
nate.
• The VDC system is not a substitute for
winter tires or tire chains on a snow
covered road.
WARNING
• Never rely solely on the hill start assist system to prevent the vehicle from
moving backward on a hill. Always
drive carefully and attentively. Depress
the brake pedal when the vehicle is
stopped on a steep hill. Be especially
careful when stopped on a hill on fro-
zen or muddy roads. Failure to prevent
the vehicle from rolling backwards
may result in a loss of control of the
vehicle and possible serious injury or
death.
• The hill start assist system is not de- signed to hold the vehicle at a stand-
still on a hill. Depress the brake pedal
when the vehicle is stopped on a steep
hill. Failure to do so may cause the
vehicle to roll backwards and may re-
sult in a collision or serious personal
injury.
• The hill start assist may not prevent the vehicle from rolling backwards on a
hill under all load or road conditions.
Always be prepared to depress the
brake pedal to prevent the vehicle
from rolling backwards. Failure to do
so may result in a collision or serious
personal injury.
HILL START ASSIST SYSTEM
5-24Starting and driving

The hill start assist system automatically keeps
the brakes applied to help prevent the vehicle
from rolling backwards in the time it takes the
driver to release the brake pedal and apply the
accelerator when the vehicle is stopped on a hill.
Hill start assist will operate automatically under
the following conditions:
• The shift lever is shifted into D (Drive) , B, or R(Reverse) position.
• The vehicle is stopped completely on a hill by applying the brake.
The maximum holding time is 2 seconds. After 2
seconds the vehicle will begin to roll back and hill
start assist will stop operating completely.
Hill start assist will not operate when the shift
lever is shifted into D (Drive) , B, or R (Reverse)
position or on a flat and level road.CAUTION
To prevent damage to the Li-ion battery:
Do not store a vehicle in temperatures
below -13°F (-25°C) for over seven days. If
the outside temperature is -13°F (-25°C)
or less, the Li-ion battery may freeze and
it cannot be charged or provide power to
run the vehicle. Move the vehicle to a
warm location.
NOTE:
• Connect the charger to the vehicle and
place the power switch in the OFF posi-
tion when parking the vehicle if tempera-
tures may go below -4°F (-20°C) . This pro-
vides external power to the Li-ion battery
warmer (if so equipped) when it operates
and does not discharge the Li-ion battery.
Vehicle driving range is reduced if the
Li-ion battery warmer (if so equipped) op-
erates (Li-ion battery temperature ap-
proximately -4°F (-20°C) or colder) while
driving the vehicle. You may need to
charge the Li-ion battery sooner than in
warmer temperatures. •
The Li-ion battery requires more time to
charge when the Li-ion battery warmer (if
so equipped) operates.
• The predicted charging time displayed on
the meter and navigation system in-
creases when the Li-ion battery warmer (if
so equipped) operates.
• Vehicle range may be substantially re-
duced in extremely cold conditions (for
example under -4°F (-20°C)) .
• Using the climate control system to heat
the cabin when outside temperature is
below 32°F (0°C) uses more electricity and
affects vehicle range more than when us-
ing the heater when the temperature is
above 32°F (0°C) .
• Climate control performance is reduced
when using the Climate Ctrl. Timer or Re-
mote Climate Control while the Li-ion bat-
tery warmer (if so equipped) operates. Set
only the charging timer [End Time] when
charging in cold weather. The vehicle au-
tomatically determines when to start
charging to fully charge the Li-ion battery,
even if the Li-ion battery warmer operates.
Charging ends before the set end time if
the Li-ion battery is fully charged.
COLD WEATHER DRIVING
Starting and driving5-25

•Do not use the emergency tire punc-
ture repair kit under the following con-
ditions. Contact a NISSAN certified
LEAF dealer or professional road
assistance.
–when the sealant has passed its ex-
piration date (shown on the label
attached to the bottle)
– when the cut or the puncture is ap-
proximately 0.25 in (6 mm) or longer
– when the tire sidewall is damaged
– when the vehicle has been driven
with extremely low tire pressure
– when the tire has come off the in-
side or the outside of the wheel
– when the tire wheel is damaged
– when two or more tires are flat
If you have a flat tire, follow the instructions be-
low.
Stopping the vehicle
1. Safely move the vehicle off the road and away from traffic.
2. Turn on the hazard warning flashers.
3. Park on a level surface and apply the parking brake. 4. Push the P (Park) position switch on the shift
lever to the P (Park) position.
5. Turn off the EV (Electric Vehicle) system.
6. Raise the hood to warn other traffic and to signal professional road assistance personnel
that you need assistance.
7. Have all passengers get out of the vehicle and stand in a safe place, away from traffic and
clear of the vehicle.
WARNING
• Make sure the parking brake is se-
curely applied and the vehicle is placed
into the P (Park) position.
• Never repair tires when the vehicle is
on a slope, ice or slippery areas. This is
hazardous.
• Never repair tires if oncoming traffic is
close to your vehicle. Wait for profes-
sional road assistance.
Getting emergency tire puncture repair
kit
Take out the emergency tire puncture repair kit
located under the cargo area. The repair kit con-
sists of the following items:
1Tire sealant bottle
2Air compressor*
3Speed restriction sticker
* The compressor shape may differ depending on
the models.
In case of emergency6-5

WARNING
• Always follow the instructions below. Failure to do so could result in damage
to the DC/DC converter and cause per-
sonal injury.
• Do not attempt to perform a jump start on the 12-volt battery at the same time
that the Li-ion battery is being
charged. Doing so may damage the
vehicle or charging equipment and
could cause an injury.
CAUTION
LEAF cannot be used as a booster vehicle
because it cannot supply enough power
to start a gasoline engine. However, a
gasoline engine vehicle can be used to
jump start LEAF’s 12-volt battery.
1. If the booster battery is in another vehicle
B,
position the two vehicles (
AandB) to bring
their 12-volt batteries into close proximity to
each other.
Do not allow the two vehicles to touch. 2. Apply the parking brake.
If the 12-volt battery is discharged, the
power switch cannot be moved from the
OFF position. Connect the jumper cables
to the booster vehicle
Bbefore pushing
the power switch.
3. Push the P (Park) position switch to place the vehicle in the P (Park) position.
4. Switch off all unnecessary electrical systems (headlights, heater, air conditioner, etc.) .
5. Place the power switch in the OFF position.
6. Ensure vent caps are level and tight.
7. Connect jumper cables in the sequence as illustrated (
1→2→3→4).
CAUTION
• Always connect positive (+) to positive
(+) and negative (−) to body ground (for
example, as illustrated) , not to the 12-
volt battery.
• Make sure the jumper cables do not touch moving parts in the motor com-
partment and that the cable clamps do
not contact any other metal.
8. Start the engine of the booster vehicle
B.
In case of emergency6-11

8 Maintenance and do-it yourself
Maintenance requirement................. .8-2
Scheduled maintenance ................ .8-2
General maintenance .................. .8-2
Where to go for service ................ .8-2
General maintenance .................... .8-2
Explanation of maintenance items ...........8-2
Maintenance precautions ................. .8-5
Motor compartment check locations ............8-7
Cooling system ....................... .8-8
Checking coolant level ................. .8-9
Changing coolant .................... .8-9
Reduction gear fluid .................... .8-10
Brake fluid ......................... .8-10
Windshield-washer fluid ................. .8-11
12-volt battery ....................... .8-12
Jump starting ...................... .8-13
Windshield wiper blades ................. .8-13
Cleaning ........................ .8-13
Replacing ........................ .8-14Rear window wiper blade
...............8-16
Brakes ........................... .8-16
Brake pad wear warning ................8-16
Fuses ............................ .8-17
Motor compartment .................. .8-17
Passenger compartment ................8-19
Nissan Intelligent Key® battery replacement ......8-20
Lights ............................ .8-22
Headlights ....................... .8-23
Exterior and interior lights ...............8-24
Wheels and tires ..................... .8-27
Tire pressure ...................... .8-27
Tire labeling ...................... .8-30
Types of tires ...................... .8-33
Tire chains .......................
.8-34
Changing

wheels and tires .............. .8-34
Emergency tire puncture repair kit ..........8-37

keeps the motor hood from opening when the
primary latch is released.
When driving in areas using road salt or other
corrosive materials, check lubrication frequently.
Lights*:Clean the headlights on a regular basis.
Make sure that the headlights, stop lights, tail
lights, turn signal lights and other lights are all
operating properly and installed securely. Also
check the aim of the headlights.
Road wheel nuts (lug nuts)*: When checking
the tires, make sure that no wheel nuts are miss-
ing, and check for any loose wheel nuts. Tighten
if necessary.
Tire rotation*: Tires should be rotated every
5,000 miles (8,000 km) .
Tires*: Check the pressure with a gauge often
and always prior to long distance trips. If neces-
sary, adjust the pressure in all tires to the pres-
sure specified. Check carefully for damage, cuts
or excessive wear.
Tire Pressure Monitoring System (TPMS)
transmitter components: Replace the TPMS
transmitter grommet seal, valve core and cap
when the tires are replaced due to wear or age. Wheel alignment and balance:
If the vehicle
pulls to either side while driving on a straight and
level road, or if you detect uneven or abnormal tire
wear, there may be a need for wheel alignment.
If the steering wheel or seat vibrates at normal
highway speeds, wheel balancing may be
needed.
For additional information regarding tires, refer to
“Important Tire Safety Information” (US) or “Tire
Safety Information” (Canada) in the Warranty In-
formation Booklet.
Windshield: Clean the windshield on a regular
basis. Check the windshield at least every six
months for cracks or other damage. Have a dam-
aged windshield repaired by a qualified repair
facility.
Wiper blades*: Check for cracks or wear if they
do not wipe properly.
Inside vehicle
The maintenance items listed here should be
checked on a regular basis, such as when per-
forming scheduled maintenance, cleaning the ve-
hicle, etc.
Accelerator pedal: Check the pedal for smooth
operation and make sure that the pedal does not catch or require uneven effort. Keep the floor mat
away from the pedal.
Brake pedal:
Check the pedal for smooth op-
eration. If the brake pedal suddenly goes down
further than normal, the pedal feels spongy or the
vehicle seems to take longer to stop, see a
NISSAN certified LEAF dealer immediately. Keep
the floor mat away from the pedal.
Brakes: Check that the brakes do not pull the
vehicle to one side when applied.
Electric shift P (Park) position mechanism:
On a steep hill, check that the vehicle is held
securely while the vehicle is in the P (Park) posi-
tion without applying the brakes.
Parking brake: Check the parking brake opera-
tion regularly. The vehicle should be securely held
on a steep hill with only the parking brake applied.
If the parking brake cannot keep a vehicle posi-
tion contact a NISSAN certified LEAF dealer.
Seat: Check seat position controls such as the
seat adjusters, seatback recliners, etc. to ensure
that they operate smoothly and that all latches
lock securely in every position. Check that the
head restraints/headrests move up and down
smoothly and that the locks (if so equipped) hold
securely in all latched positions.
Maintenance and do-it yourself8-3

Seat belts:Check that all parts of the seat belt
system (for example, buckles, anchors, adjusters
and retractors) operate properly and smoothly,
and are installed securely. Check the belt web-
bing for cuts, fraying, wear or damage.
Steering wheel: Check for changes in the
steering conditions, such as excessive free play,
hard steering or strange noises.
Warning lights and chimes: Make sure that all
warning lights and chimes are operating properly.
Windshield defroster: Check that the air emits
from the defroster outlets properly and in suffi-
cient quantity when operating the heater or air
conditioner.
Windshield wiper and washer*: Check that
the wipers and washers operate properly and
that the wipers do not streak.
Under hood and vehicle
The maintenance items listed here should be
checked periodically.
12-volt battery (for serviceable battery)*:
Check the fluid level in each cell. It should be
between the MAX and MIN lines. Vehicles oper-
ated in high temperatures or under severe condi- tions require frequent checks of the 12–volt bat-
tery fluid level.
NOTE:
Care should be taken to avoid situations
that can lead to potential battery discharge
and potential no-start conditions such as:
1. Installation or extended use of electronic ac-
cessories that consume battery power when
the engine is not running (Phone chargers,
GPS, DVD players, etc.)
2. Vehicle is not driven regularly and/or only driven short distances.
In these cases, the battery may need to be
charged to maintain battery health.
Brake fluid level*: Make sure that the brake
fluid level is between the “MAX” and “MIN” lines
on the reservoir.
Coolant level*: Check the coolant level when
the motor compartment is cold.
Fluid leaks: Check under the vehicle for water
or other fluid leaks after the vehicle has been
parked for a while. Water dripping from the air
conditioner after use is normal. If you should
notice any leaks, check for cause and have it
corrected immediately. Radiator and hoses:
Check the front of the
radiator and clean off any dirt, insects, leaves,
etc., that may have accumulated. Make sure that
the hoses have no cracks, deformation, rot or
loose connections.
Underbody: The underbody is frequently ex-
posed to corrosive substances such as those
used on icy roads or to control dust. It is very
important to remove these substances, other-
wise rust will form on the floor pan and frame. At
the end of winter, the underbody should be thor-
oughly flushed with plain water, being careful to
clean those areas where mud and dirt may accu-
mulate. For additional information, refer to
“Cleaning exterior” in the “Appearance and care”
section of this manual.
Windshield-washer fluid*: Check that there is
an adequate amount of fluid in the reservoir.
8-4Maintenance and do-it yourself

When performing any inspection or maintenance
work on your vehicle, always take care to prevent
serious accidental injury to yourself or damage to
the vehicle. The following are general precau-
tions that should be closely observed.
WARNING
• The EV system uses high voltage up to approximately DC 400 volt. The system
can be hot during and after starting
and when the vehicle is shut off. Be
careful of both the high voltage and
the high temperature. Obey the labels
that are attached to the vehicle.
• Never disassemble, remove or replace high-voltage parts and cables as well
as their connectors. High-voltage
cables are colored orange.
• Disassembling, removing or replacing those parts or cables can cause severe
burns or electric shock that may result
in serious injury or death. The vehicle
high-voltage system has no user ser-
viceable parts. Take your vehicle to the
NISSAN certified LEAF dealer for any
necessary maintenance. • Park the vehicle on a level surface,
apply the parking brake securely and
chock the wheels to prevent the ve-
hicle from moving. Push the P (Park)
position switch on the shift lever or
place the vehicle into the N (Neutral)
position.
• If you must work with the EV (Electric vehicle) system is turned on, keep
hands, clothing, hair and tools away
from moving fans and any other mov-
ing parts.
• Make sure that the power switch is in the OFF or LOCK position when per-
forming any part replacement or re-
pairs.
• It is advisable to secure or remove any loose clothing and remove any jewelry,
such as rings, watches, etc. before
working on your vehicle.
• Always wear eye protection whenever you work on your vehicle.
• Never get under the vehicle while it is supported only by a jack. If it is neces-
sary to work under the vehicle, support
it with safety stands.
• Keep smoking materials, flames and sparks away from the 12-volt battery.
CAUTION
• Do not work under the hood while the motor compartment is hot. Push the
power switch in the OFF position and
wait until it cools down.
• Avoid direct contact with used coolant. Improperly disposed coolant and/or
other vehicle fluids can damage the
environment. Always conform to local
regulations for the disposal of vehicle
fluids.
• Never connect or disconnect the bat- tery or any transistorized component
while the power switch is in the ON
position.
• Your vehicle is equipped with an auto- matic cooling fan. It may come on at
any time without warning, even if the
power switch is not in the ACC, ON or
READY to drive position. To avoid in-
jury, always disconnect the negative
12-volt battery cable before working
near the fan.
• Before performing any electrical main- tenance work on the vehicle such as
the battery, fuses or bulb replacement,
confirm the following:
– The charge connector is removedfrom the vehicle.
MAINTENANCE PRECAUTIONS
Maintenance and do-it yourself8-5