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INTEGRATED DISPLAY SYSTEM AV-91
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Revision: 2006 December 2006 FX35/FX45
Values for All Items in The TRIP Screen Do Not ChangeNKS003JQ
Symptom: Values for items, “Elapsed Time”, “Driving Distance” and “Average Speed” in the TRIP screen do
not change. FUEL ECONOMY screen is not displayed when pressing “TRIP” button.
1. CHECK DISPLAY CONTROL UNIT IGNITION SIGNAL
Select “Vehicle Signals” in Confirmation/Adjustment mode, and check the ignition signal inputting to display
control unit. Refer to AV- 8 0 , "
VEHICLE SIGNALS" .
OK or NG
OK >> Replace display control unit.
NG >> Check display control unit ignition signal circuit, and repair malfunctioning part.
Values for Items, “Driving Distance” and “Average Speed” Do Not ChangeNKS003JR
Symptom: Values for Items, "Driving Distance" and "Average Speed" do not change. (The Value for "Elapsed
Time" Changes.)
1. CHECK DISPLAY CONTROL UNIT VEHICLE SPEED SIGNAL
Select “Vehicle Signals” in Confirmation/Adjustment mode, and check the vehicle speed signal inputting to dis-
play control unit. Refer to AV- 8 0 , "
VEHICLE SIGNALS" .
OK or NG
OK >> Replace display control unit.
NG >> Check display control unit vehicle speed signal circuit, and repair malfunctioning part.
Values for All Items in The FUEL ECONOMY Screen Do Not ChangeNKS003JS
Symptom: Values for items, “Average Fuel Economy” and “Distance to Empty” in the FUEL ECONOMY screen
do not change.
1. CHECK CONDITION
Check if values for all items in the TRIP screen change properly.
OK or NG
OK >> GO TO 2.
NG >> Repair malfunctioning part. Refer to AV- 9 1 , "
Values for All Items in The TRIP Screen Do Not
Change" or AV- 9 1 , "Values for Items, “Driving Distance” and “Average Speed” Do Not Change" .
2. CHECK CAN COMMUNICATION
Check CAN communication. Refer to AV- 8 3 , "
CAN Communication Check" .
OK or NG
OK >> Replace display control unit.
NG >> After filling out CAN DIAG SUPPORT MONITOR check sheet, GO TO LAN-3, "
Precautions When
Using CONSULT-II" .
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AV-92
INTEGRATED DISPLAY SYSTEM
Revision: 2006 December 2006 FX35/FX45
Example of Symptoms Possible No MalfunctionNKS003JT
For system operation information, refer to Owner's Manual.
DISPLAY
Removal and Installation of DisplayNKS003LI
Refer to AV- 4 3 , "Disassembly and Assembly for Audio Unit" .
Removal and Installation of Display Control UnitNKS003LZ
REMOVAL
1. Remove instrument passenger lower panel. Refer to IP-10,
"INSTRUMENT PANEL ASSEMBLY" .
2. Remove screws (A) with power tool and remove display control unit (1).
3. Remove screws (4) with power tool and remove brackets.
INSTALLATION
Installation is the reverse order of removal.
Removal and Installation of A/C and AV SwitchNKS003LJ
Refer to AV- 4 4 , "Removal and Installation for A/C and AV Switch" .
Symptom Possible cause Possible solution
No image is displayed. The brightness is at the lowest setting. Adjust the brightness of the display.
The display is turned off. Press and hold the button to turn on the
display.
The screen is too dim.
The movement is slow. The temperature in the interior of the vehicle is
low. Wait until the interior of the vehicle has
warmed up.
Some pixels in the display are
darker or brighter than others. This condition is an inherent characteristic of
liquid crystal displays. This is not a malfunction.
Some menu items cannot be
selected. Some menu items become unavailable while
the vehicle is driven. Park the vehicle in a safe location, then oper-
ate the navigation system.
The screen does not switch to the
night screen even after turning on
the headlights. The daytime screen was set the last time the
headlights were turned on. Set the screen to the night screen mode using
button when turning on the headlights.
SKIB8667E
SKIA5826E
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NAVIGATION SYSTEM AV-93
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Revision: 2006 December 2006 FX35/FX45
NAVIGATION SYSTEMPFP:25915
System DescriptionNKS003K0
For Navigation System operation information, refer to Navigation System Owner's Manual.
Each control unit that comprises the system is connected with a communication circuit. It transmits/
receives data signals including request signals and response signals, and controls the system.
The display control unit transmits/receives data signals to/from each control unit with CAN communica-
tion. It performs an arithmetical operation on fuel information values by using data obtained from the con-
trol units, and then displays the calculated values on the screen.
The display control unit receives door switch signals from the BCM with CAN communication, and dis-
plays a warning on the screen when driving over the set speed with a door half-shut.
The display control unit receives vehicle speed signals that are transmitted from the unified meter and A/
C amp., performs an arithmetical operation on drive information values, and then displays the calculated
values on the screen.
The images displayed on the monitor screen contain NAVI control unit-generated RGB images.
The display control unit controls image switching and image quality adjustments by communications with
the display.
SKIB8652E
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AV-94
NAVIGATION SYSTEM
Revision: 2006 December 2006 FX35/FX45
NAVIGATION SYSTEM
Location 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 DVD-ROM,
which is stored in the DVD-ROM drive (map-matching), and indi-
cated on the screen as a current-location 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
sensor input signal. Therefore, the calculation may become
incorrect as the tires wear down. To prevent this, an automatic
distance correction function has been adopted.
Travel direction
Change in the travel direction of the vehicle is calculated by a
gyroscope (angular velocity sensor) and a GPS antenna (GPS
information). They have both advantages and disadvantages.
More accurate traveling direction is selected because priorities are set for the signals from these two
devices according to the situation.
SKIB1058E
SEL684V
Type Advantage Disadvantage
Gyroscope (angular velocity sen-
sor) 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 vehi-
cle speed is low.
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NAVIGATION SYSTEM AV-95
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Revision: 2006 December 2006 FX35/FX45
Map-Matching
Map-matching compares a current location detected by the method
in the “Location Detection Principle” with a road map data from DVD-
ROM stored in DVD-ROM drive.
NOTE:
The road map data is based on data stored in the DVD-ROM.
The vehicle position may not be corrected under the following circumstances and after driving for a certain
time when GPS information is difficult to receive. In this case, the current-location mark on the display must be
corrected manually.
In map-matching, alternative routes are prepared and prioritized
in addition to the road judged currently driven. Due to the dis-
tance and/or direction error, the incorrect road may be prioritized
and current-location mark may be repositioned to the wrong
road.
When two roads are running in parallel, they are judged to the
same priority. Therefore, the current-location mark may appear
on either of them alternately, depending on maneuvering of the
steering wheel and configuration of the road.
Map-matching does not function correctly when a road on which
the vehicle is driving is new and not recorded in the DVD-ROM,
or when road pattern stored in the map data and the actual road
pattern are different due to repair.
When driving on a road not present in the map, the map-match-
ing function may find another road and position the current-loca-
tion mark on it. Then, when the correct road is detected, the
current-location mark may change to it.
Effective range for comparing the vehicle position and travel
direction calculated by the distance and direction with the road
data read from the DVD-ROM is limited. Therefore, when there
is an excessive gap between current vehicle position and the
position on the map, correction by map-matching is not possible.
SEL685V
SEL686V
SKIA0613E
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AV-96
NAVIGATION SYSTEM
Revision: 2006 December 2006 FX35/FX45
GPS (Global Positioning System)
GPS (Global Positioning System) was developed for and is con-
trolled by the US Department of Defense. The system utilizes GPS
satellites (NAVSTAR), sending out radio waves while flying on an
orbit around the earth at an altitude of approximately 21,000 km
(13,100 miles).
The GPS receiver calculates the vehicle's position in three dimen-
sions (latitude/longitude/altitude) according to the time lag of the
radio waves received from four or more GPS satellites (three-dimen-
sional positioning). If radio waves were received only from three
GPS satellites, the GPS receiver calculates the vehicle's position in
two dimensions (latitude/longitude), and utilize the altitude data cal-
culated previously with radio waves from four or more GPS satellites
(two-dimensional positioning).
Position correction by GPS is not available while the vehicle is stopped.
Accuracy of GPS will deteriorate under the following conditions:
In two-dimensional positioning, GPS accuracy will deteriorate when altitude of the vehicle position
changes.
The accuracy can be even lower depending on the arrangement of the GPS satellites utilized for the posi-
tioning.
Position detection is not possible when vehicle is in an area where radio waves from the GPS satellite do
not reach, such as in a tunnel, parking lot in a building, and under an elevated highway. Radio waves from
the GPS satellites may not be received when some object is located over the GPS antenna.
NOTE:
Even a high-precision three dimensional positioning, the detection result has an error about 10 m (30ft).
Because the signals of GPS satellite is controlled by the Tracking and Control Center in the United States,
the accuracy may be degraded lower intentionally or the radio waves may stop.
SEL526V
Page 703 of 4462

NAVIGATION SYSTEM AV-97
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Revision: 2006 December 2006 FX35/FX45
Component DescriptionNKS003K1
NAVI CONTROL UNIT
The gyro (angular speed sensor) and the DVD-ROM drive are
built-in units that control the navigation functions.
Signals are received from the gyro, the vehicle speed sensor,
and the GPS antenna. Vehicle location is determined by com-
bining this data with the data contained in the DVD-ROM map.
Locational information is shown on liquid crystal display panel.
DVD-ROM Drive
Maps, traffic control regulations, and other pertinent information can
be easily read from the DVD-ROM.
DVD-ROM
The DVD-ROM has maps, traffic control regulations, and other pertinent information.
To improve DVD-ROM map matching and route determination functions, the DVD-ROM uses an exclusive
Nissan format. Therefore, the use of a DVD-ROM provided by other manufacturers cannot be used.
Gyro (Angular Speed Sensor)
The oscillator gyro sensor is used to detect changes in vehicle steering angle.
The gyro is built into the navigation (NAVI) control unit.
GPS ANTENNA
The GPS antenna receives and amplifies the radio waves from the GPS satellites, and then transmits the GPS
signal to NAVI control unit.
DISPLAY CONTROL UNIT
Display control unit draws a status of the audio and air condi-
tioner, a TRIP screen, a FUEL ECONOMY screen, etc., and
transmits the image signals to the display screen.
It receives operation signals of audio and air conditioner from A/
C and AV switch, and transmits the operation signal of audio to
the audio unit via the communication line and transmits the
operation signal of air conditioner to the meter and A/C amp. via
CAN communication.
SKIB3892E
SKIB6982E
SKIB8638E
Page 704 of 4462
AV-98
NAVIGATION SYSTEM
Revision: 2006 December 2006 FX35/FX45
DISPLAY
Images on the display include RGB image such as map screen.
Display control unit controls images on the display.
A/C AND AV SWITCH
A/C and AV switch, an integrated combination of audio and air
conditioner switches, are adopted.
Operation signal of audio is transmitted to the audio unit through
display control unit with the communication line. Operation sig-
nal of air conditioner is transmitted to meter and A/C amp.
through display control unit with CAN communication.
CAN Communication UnitNKS003K2
Refer to LAN-32, "CAN Communication Unit" .
Component Parts LocationNKS003K3
SKIB8639E
SKIB8639E
SKIB8641E