2016 NISSAN NOTE current sensor

AV-136
< SYSTEM DESCRIPTION >[NAVIGATION]
SYSTEM
• AV control unit calculates the vehicle location based
on the signals from GYRO (angle speed sensor), vehi-
cle sensor, and GPS satellite, as well as the map data from map SD-card. The vehicle location is displayed
on the AV control unit.
POSITION DETECTION PRINCIPLE
The navigation system periodically calculates the vehicle's current position according to the following three
signals:
• Travel distance of the vehicle as determined by the vehicle speed sensor
• Turning angle of the vehicle as determined by the gyroscope (angular velocity sensor)
• Direction of vehicle travel as determined by the GPS antenna (GPS information)
The current position of the vehicle is then identified by comparing the calculated vehicle position with map data
read from the map SD-card (map-matching), and indica ted on the screen as a vehicle mark. More accurate
data is judged and used by comparing vehicle position detection results found by the GPS with the result by
map-matching.
The current vehicle position will be calculated by detecting the dis-
tance the vehicle moved from the previous calculation point and its
direction.
• Travel distance Travel distance calculations are based on the vehicle speed sen-
sor input signal. Therefore, the calculation may become incorrect
as the tires wear down. To prevent this, an automatic distance cor-
rection function has been adopted.
• Travel direction
Change in the travel direction of the vehicle is calculated by a gyro-
scope (angular velocity sensor) and a GPS antenna (GPS informa-
tion). They have both advantages and disadvantages.
More accurate traveling direction is detected becaus e priorities are set for the signals from these two
devices according to the situation.
MAP-MATCHING
Map-matching compares a current location detected by the method
in the “Location Detection Princi ple” with a road map data from map
SD-card.
NOTE:
The road map data is based on data stored in the map SD-card.
The vehicle position may not be corrected under the foll owing circumstances and after driving for a certain
time when GPS information is difficult to receive. In this case, the vehicle mark on the display must be cor-
rected manually.
SEL684V
Type Advantage Disadvantage
Gyroscope
(angular velocity sensor) Can detect the vehicle's turning angle quite
accurately. Direction errors
may accumulate when vehicle is
driven for long distances without stopping.
GPS antenna
(GPS information) Can detect the vehicle's travel direction
(North/South/East/West). Correct direction cannot be detected when vehicle
speed is low.
SEL685V
Revision: August 2015
2016 Versa Note

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AV
NORMAL OPERATING CONDITIONAV-237
< SYMPTOM DIAGNOSIS > [NAVIGATION]
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Cause (condition) –: While driving ooo: Display Driving conditionRemarks (correction, etc.)
Road config-
uration Y–intersections
At a Y intersection or similar gradual divi-
sion of roads, an error in the direction of
travel deduced by the sensor may result in
the current-location mark appearing on the
wrong road.
If after travelling about 10 km (6
miles) the correct location has
not been restored, perform lo-
cation correction and, if neces-
sary, direction correction.
Spiral roads
When driving on a large, continuous spiral
road (such as loop bridge), turning angle
error is accumulated and the vehicle mark
may deviate from the correct location.
Straight roads When driving on a long, straight road and
slow curve without stopping, map-matching
does not work effectively enough and dis-
tance errors may accumulate. As a result,
the vehicle mark may deviate from the cor-
rect location when the vehicle is turned at a
corner.
Zigzag roads When driving on a zigzag road, the map
may be matched to other roads in the simi-
lar direction nearby at every turn, and the
vehicle mark may deviate from the correct
location.
Roads laid out in a grid pattern When driving where roads are laid out in a
grid pattern, or where many roads are run-
ning in the similar direction nearby, the map
may be matched to them by mistake and
the vehicle mark may deviate from the cor-
rect location.
Parallel roads When two roads are running in parallel
(such as highway and sideway), the map
may be matched to the other road by mis-
take and the vehicle mark may deviate from
the correct location.
ELK0192D
ELK0193D
ELK0194D
ELK0195D
ELK0196D
ELK0197D
Revision: August 2015 2016 Versa Note

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AV
NORMAL OPERATING CONDITIONAV-239
< SYMPTOM DIAGNOSIS > [NAVIGATION]
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Location Correction by Map-Matching is Slow
• The map-matching function needs to refer to the data of
the surrounding area. It is necessary to drive some
distance for the function to work.
• Because map-matching operates on this principle, when there are many roads running in similar directions
in the surrounding area, no matching determination ma y be made. The location may not be corrected until
some special feature is found.
Name of Road is Not Displayed
The current road name may not be displayed if there are no road names displayed on the map screen.
Contents of Display Differ for Birdview™ and the (Flat) Map Screen
Difference of the BIRDVIEW™ screen from the flat map screen are as follows.
• The current place name displays names which are primarily in the direction of vehicle travel.
• The amount of time before the vehicle travel or turn angle is updated on the screen is longer than for the
(flat) map display.
• The conditions for display of place names, roads, and other data are different for nearby areas and for more
distant areas.
• Some thinning of the character data is done to prevent the display becoming too complex. In some cases
and in some locations, the display contents may differ.
• The same place name, street name, et c. may be displayed multiple times.
Vehicle Mark Shows a Position Which is Completely Wrong
In the following cases, the vehicle mark may appear on completely different position in the map depending on
the GPS satellite signal receiving conditions. In this case, perform location correction and direction correction.
• When location correction has not been done
- If the receiving conditions of the GPS satellite signal is poor, if the vehicle mark becomes out of place, it may
move to a completely different location and not come back if location correction is not done. The position will
be corrected if the GPS signal can be received.
• When the vehicle has traveled by ferry, or when the vehicle has been being towed
Precautions
for driving Just after the engine is started
If the vehicle is driven just after the engine
is started when the gyroscope (angular
speed sensor) correction is not completed,
the vehicle can lose its direction and may
have deviated from the correct location. Wait for a short while before
driving after starting the engine.
Continuous driving without stopping When driving long distances without stop- ping, direction errors may accumulate, and
the current-location mark may deviate from
the correct road. Stop and adjust the orientation.
Abusive driving Spinning the wheels or engaging in other
kinds of abusive driving may result in the
system being unable perform correct detec-
tion, and may cause the vehicle mark to de-
viate from the correct road. If after travelling about 10 km (6
miles) the correct location has
not been restored, perform lo-
cation correction and, if neces-
sary, direction correction.
How to cor-
rect location Position correction accuracy
If the accuracy of location settings is poor,
accuracy may be reduced when the correct
road cannot be found, particularly in places
where there are many roads. Enter in the road displayed on
the screen with an accuracy of
approx. 1mm.
Caution: Whenever possible,
use detailed map for the correc-
tion.
Direction when location is corrected
If the accuracy of location settings during
correction is poor, accuracy may be re-
duced afterwards. Perform direction correction.
Cause (condition) –: While driving ooo: Display
Driving conditionRemarks (correction, etc.)
SEL701V
SEL702V
Revision: August 2015 2016 Versa Note

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AV-240
< SYMPTOM DIAGNOSIS >[NAVIGATION]
NORMAL OPERATING CONDITION
- Because calculation of the current location cannot be
done when traveling with the ignition off, for example
when traveling by ferry or when being towed, the location before travel is displayed. If the precise location
can be detected with GPS, the location will be corrected.
Vehicle Mark Jumps
In the following cases, the vehicle mark may appear to ju mp as a result of automatic correction of the current
location.
• When map matching has been done
- If the current location and the vehicle mark are diff erent when map matching is done, the vehicle mark may
seem to jump. At this time, the location may be “corre cted” to the wrong road or to a location which is not on
a road.
• When GPS location correction has been done
- If the current location and the vehicle mark are different when the location is corrected using GPS measure-
ments, the vehicle mark may seem to jump. At this time, the location may be “corrected” to a location which
is not on a road.
Vehicle Mark is in a River or Sea
The navigation system moves the vehicle mark with no distinction between land and rivers or sea. If the vehi-
cle mark is somehow out of place, it may appear that the vehicle is driving in a river or the sea.
Vehicle Mark Automatically Rotates
The system wrongly memorizes the rotating status as st opping when the ignition switch is turned ON with the
turntable rotating. That causes the vehicle mark to rotate when the vehicle is stopped.
When Driving on Same Road, Sometimes Vehicle Mark is in Right Place and Sometimes it is in Wrong Place
The conditions of the GPS antenna (GPS data) and gyroscope (angular speed sensor) change gradually.
Depending on the road traveled and the operation of the steering wheel, \
the location detection results will be
different. Therefore, even on a road on which the lo cation has never been wrong, conditions may cause the
vehicle mark to deviate.
Revision: August 2015 2016 Versa Note

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COMPONENT PARTSBRC-9
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
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Switches the fluid pressure line to increase or hold according to signals from control unit.
ABS OUT Valve
Switches the fluid pressure line to increase, hold or decrease according to signals from control unit.
Cut Valve 1, Cut Valve 2
Shuts off the ordinary brake line from master cylinder, when VDC function and TCS function are activated.
Suction Valve 1, Suction Valve 2
Supplies the brake fluid from master cylinder to the pump, when VDC function and TCS function are activated.
Return Check Valve
Returns the brake fluid from brake caliper and wheel cyli nder to master cylinder by bypassing orifice of each
valve when brake is released.
Reservoir
Temporarily reserves the brake fluid drained from brake caliper, so that pressure efficiently decreases when
decreasing pressure of brake caliper and wheel cylinder.
Yaw rate/side/decel G sensor
Calculates the following information that affects the v ehicle, and transmits a signal to ABS actuator and elec-
tric unit (control unit) via communication lines:
• Vehicle rotation angular velocity (yaw rate signal)
• Vehicle lateral acceleration (side G signal) and longitudinal acceleration (decel G signal)
Pressure Sensor
Detects the brake fluid pressure and transmits signal to ABS actuator and electric unit (control unit).
Wheel Sensor and Sensor RotorINFOID:0000000012430829
NOTE:
• Wheel sensor of front wheel is installed on steering knuckle.
• Sensor rotor of front wheel is integrated in wheel hub assembly.
• Wheel sensor of rear wheel is installed on back plate of rear brake.
• Sensor rotor of rear wheel is installed on rear brake drum.
• Never measure resistance and voltage value using a tester because sensor is active sensor.
• Downsize and weight reduction is aimed. IC for detection portion
and magnet for sensor rotor are adopted.
• Power supply is supplied to detection portion so that magnetic field
line is read. Magnetic field that is detected is converted to current
signal.
• When sensor rotor rotates, magnetic field changes. Magnetic field
change is converted to current signals (rectangular wave) and is
transmitted to ABS actuator and electric unit (control unit). Change
of magnetic field is pr oportional to wheel speed.
Stop Lamp SwitchINFOID:0000000012430830
Detects the operation status of brake pedal and transmits converted electric signal to ABS actuator and elec-
tric unit (control unit).
Steering Angle SensorINFOID:0000000012430831
Detects the following information and transmits steering angle signal to ABS actuator and electric unit (control
unit) via CAN communication:
• Steering wheel rotation amount
• Steering wheel rotation angular velocity
• Steering wheel rotation direction
JPFIC0131GB
Revision: August 2015 2016 Versa Note

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BRC-12
< SYSTEM DESCRIPTION >[VDC/TCS/ABS]
SYSTEM
VALVE OPERATION (VDC AND TCS FUNCTIONS)
The control unit built in the ABS actuator and electric unit (control unit) controls fluid pressure of the brake cal-
ipers by operating each valve.
VDC and TCS Functions are Operating (Pressure Increases)
Component
Signal description
Steering angle sensor Transmits the steering angle sensor signal to ABS actuator and electric unit (control unit) via
CAN communication.
ECM Transmits the following signals to ABS actuator and electric unit (control unit) via CAN commu-
nication:
• Accelerator pedal position signal
• Engine speed signal
• Target throttle position signal
TCM Transmits the current gear position signal to ABS actuator and electric unit (control unit) via
CAN communication.
Combination meter Transmits the following signals to ABS actuator and electric unit (control unit) via CAN commu-
nication:
• Brake fluid level switch signal
• Parking brake switch signal
Receives the following signals fr
om ABS actuator and electric un it (control unit) via CAN com-
munication:
• ABS warning lamp signal
• Brake warning lamp signal
• VDC OFF indicator lamp signal
• SLIP indicator lamp signal
JSFIA0670GB
Name Not activated Pressure increases
Cut valve 1 Power supply is not supplied (open) Power supply is supplied (close)
Cut valve 2 Power supply is not supplied (open) Power supply is supplied (close)
Suction valve 1 Power supply is not supplied (close) Power supply is supplied (open)
Suction valve 2 Power supply is not supplied (close) Power supply is supplied (open)
ABS IN valve Power supply is not supplied (open) Power supply is not supplied (open)
Revision: August 2015 2016 Versa Note

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SYSTEMBRC-23
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
C
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M A
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BRC
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• Brake force control function at braking hard detects driver ′s brake operations with the pressure sensor,
judges a brake booster ′s maximum brake power function by using information from the vacuum sensor, and
enhances more powerful braking force by controlling brakes of four wheels.
• VDC warning lamp blinks while VDC function is in operat ion and indicates to the driver that the function is in
operation.
• CONSULT can be used to diagnose the system.
• Fail-safe function is adopted. When a malfunction occurs in VDC function, the control is suspended for VDC
function and TCS function. However, ABS function and EBD function operate normally. Refer to BRC-39,
"Fail-safe".
INPUT SIGNAL AND OUTPUT SIGNAL
Major signal transmission between each unit via communication lines is shown in the following table.
OPERATION CHARACTERISTICS
VDC Function That Prevents Oversteer Tendency
• During cornering, brake force (brake fluid pressure) is applied on front wheel and rear wheel on the outer
side of turn. Momentum is generated directing the vehicle toward the outer side of the turn. Oversteer is pre-
vented.
• Changing driving lane on a slippery road, when there may be a tendency to oversteer, engine output is con-
trolled as well as brake force (brake fluid pr essure) of 4 wheels. Oversteer tendency decreases.
Component Signal description
ECM Transmits the following signals to ABS actuator an
d electric unit (control unit) via CAN commu-
nication:
• Acceleration pedal position signal
• Engine speed signal
• Target throttle position signal
TCM Transmits the current gear positi
on signal to ABS actuator and electric unit (control unit) via
CAN communication.
Steering angle sensor Transmits the steering an
gle sensor signal to ABS actuator an d electric unit (control unit) via
CAN communication.
Combination meter Transmits the following signals to ABS actuator an
d electric unit (control unit) via CAN commu-
nication:
• Brake fluid level switch signal
• parking brake switch signal
Receives the following signals from ABS actuator and electric unit (control unit) via CAN com-
munication:
• VDC OFF indicator lamp signal
• SLIP indicator lamp signal
ALFIA0339GB
ALFIA0340GB
Revision: August 2015 2016 Versa Note

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SYSTEMBRC-25
< SYSTEM DESCRIPTION > [VDC/TCS/ABS]
C
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M A
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BRC
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• Wheel spin status of drive wheel is detected by wheel sensor of 4 wheels. Engine output and transmission shift status is controlled
so that slip rate of drive wheels is in appropriate level. When wheel
spin occurs on drive wheel, ABS ac tuator and electric unit (control
unit) perform brake force control of LH and RH drive wheels (apply
brake force by increasing brake fluid pressure of drive wheel) and
decrease engine torque by engine torque control. Wheel spin
amount decreases. Engine torque is controlled to appropriate
level.
• TCS function can be switched to non-operational status (OFF) by
operating VDC OFF switch. In this case, VDC OFF indicator lamp
turns ON.
• SLIP indicator lamp blinks while TCS function is in operation and
indicates to the driver that the function is in operation.
• CONSULT can be used to diagnose the system.
• Fail-safe function is adopted. When a malfunction occurs in TCS function, the control is suspended for VDC function and TCS func-
tion. However, ABS function and EBD function operate normally.
Refer to BRC-39, "
Fail-safe".
INPUT SIGNAL AND OUTPUT SIGNAL
Major signal transmission between each unit via communication lines is shown in the following table.
JPFIC0139GB
Component Signal description
ECM Transmits the following signals to ABS actuator an
d electric unit (control unit) via CAN commu-
nication:
• Accelerator pedal position signal
• Engine speed signal
• Target throttle position signal
TCM Transmits the current gear positi
on signal to ABS actuator and electric unit (control unit) via
CAN communication.
Steering angle sensor Transmits the steering an
gle sensor signal to ABS actuator an d electric unit (control unit) via
CAN communication.
Combination meter Transmits the following signals to ABS actuator an
d electric unit (control unit) via CAN commu-
nication:
• Brake fluid level switch signal
• Parking brake switch signal
Receives the following signals from ABS actuator and electric unit (control unit) via CAN com-
munication:
• VDC OFF indicator lamp signal
• SLIP indicator lamp signal
Revision: August 2015 2016 Versa Note

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