02 sensor INFINITI QX4 2001 Factory Service Manual

SEL683V
System Description=NBEL0228OUTLINENBEL0228S01The Navigation System (Multi-AV System) relies upon three sens-
ing devices in order to determine vehicle location at regular time
intervals.
1. Vehicle speed sensor: Determines the distance the vehicle has
traveled.
2. Gyro (Angular velocity sensor): Determines vehicle steering
angle and directional change.
3. GPS antenna (GPS data): Determines vehicle forward move-
ment and direction.
The data provided by the three sensing functions together with a
comparison of the mapping information read from the CD-ROM
drive permit accurate determination of the vehicle's current location
and subsequent course (map matching). The information appears
on a liquid crystal display.
This comparison of GPS data (vehicle position sensing) and map
matching permits precise determination of vehicle location.
SEL684V
Position Sensor Operating PrinciplesNBEL0228S0101The sensor determines current vehicle location by calculating the
previously sensed position, the distance traveled from this position,
and the directional changes occurring during this travel.
1. Distance traveled
The distance traveled is calculated using signals received from
the vehicle speed sensor. The sensor automatically compen-
sates for the slightly reduced wheel and tire diameter resulting
from tire wear.
2. Forward movement (Direction)
Changes in the direction of forward movement are calculated
by the gyro (angular velocity sensor) and the GPS antenna
(GPS data). Each of these functions has its advantage and
disadvantages. Depending upon conditions, one function takes
precedence over the other to accurately determine the direc-
tion of forward movement.
Function type Advantage Disadvantage
Gyro (Angular
velocity sen-
sor)IAble to accurately detect
minute changes in steering
angle and direction.ICalculation errors may
accumulate over a long
period of continuous
vehicle travel.
GPS antenna
(GPS data)IAble to sense vehicle travel
in four general directions
(North, South, East, and
West)IUnable to detect direction
of vehicle travel at low
vehicle speeds.
NAVIGATION SYSTEM
System Description
EL-386

for example, when the vehicle is in a tunnel, in a parking lot
inside building, under an elevated superhighway or near strong
power lines, the location may not be detected. Turbulent/
electric weather conditions may also affect positioning perfor-
mance. If something is placed on the antenna, the radio wave
from GPS satellites may not be received.
SEL688V
COMPONENT DESCRIPTIONNBEL0228S02Display & NAVI Control UnitNBEL0228S0201IThe gyro (angular speed sensor) and the CD-ROM drive are
built-in units that control the navigation functions.
ISignals 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 CD-ROM map.
Locational information is shown on liquid crystal display panel.
IFinger-operated touch switches are positioned on the liquid
crystal display panel for easy operation.
IThe touch switches used to control the equipment are beneath
a glass sheet and two resistance membranes at the top of the
liquid crystal display panel. The switches are sensitive to resis-
tance value where touched with your finger to detect operat-
ing status.
SEL689V
CD-ROM DriverNBEL0228S0202Maps, traffic control regulations, and other pertinent information
can be easily red from the CD-ROM disc.
NOTE:
IWhen removing the CD-ROM, allow it to remain open until the
liquid crystal display locks.
IThe liquid crystal display must be closed when the vehicle is
running.
IDo not place cups, cans or other containers containing liquids
on top of the liquid crystal display.
Map CD-ROMNBEL0228S0203IThe map CD-ROM has maps, traffic control regulations, and
other pertinent information.
ITo improve CD-ROM map matching and route determination
functions, the CD-ROM uses an exclusive Nissan format.
Therefore, the use of a CD-ROM provided by other manufac-
turers cannot be used.
NAVIGATION SYSTEM
System Description (Cont'd)
EL-388

SEL690V
Gyro (Angular Speed Sensor)NBEL0228S0204IThe oscillator gyro sensor is used to detect changes in vehicle
steering angle.
IThe oscillator gyro periodically senses oscillatory variation at
the oscillation terminals. This variation is caused by changes
in the vehicle angular velocity. Voltage variations are sensed
by ceramic voltage sensors at the left and right sides of the
terminals. Vehicle angular velocity corresponds directly with
these changes in voltage.
IThe gyro is built into the display & navigation (NAVI) control
unit.
MAP DISPLAY
BIRDVIEW
R
SEL636X
BIRDVIEWTNBEL0228S0205The BIRDVIEWTprovides a detailed and easily seen display of
road conditions covering the vehicle's immediate to distant area.
SEL691V
DescriptionNBEL0228S0206IDisplay area: Trapezoidal representation showing approximate
distances (Wn, D, and Wd).
ITen horizontal grid lines indicate display width while six verti-
cal grid lines indicate display depth and direction.
IDrawing line area shows open space, depth, and immediate
front area. Each area is to a scale of approximately 5:6:25.
IWhen the ªZMþº button is pushed, the view point height is
increased. Pushing the ªZM+º button decreases the height.
Pushing the ªZMþº button or the ªZM+º button during operation
indicates the scale change and the view point height at the
left-hand side of the screen.
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NAVIGATION SYSTEM
System Description (Cont'd)
EL-389

ªERROR HISTORYº TABLE=NBEL0232S02
Detected items Description Diagnosis/service procedureRefer-
ence
page
Gyro sensor disconnectedCommunications malfunction between
display & NAVI control unit and internal
gyroPerform self-diagnosis to confirm
whether the display & NAVI control unit
is malfunctioning or not. If no failure is
detected, a momentary and/or tempo-
rary malfunction may have been caused
by strong electromagnetic wave interfer-
ence.EL-397
Connection problem of speed
sensorInput malfunction of display & NAVI con-
trol unit and speed sensorCheck vehicle speed sensor signal in
ªDiagnosis for signals from the carº
mode. If the input signal is not detected
correctly, check harness for open or
short between combination meter and
display & NAVI control unit.EL-404
GPS disconnected
Communications malfunction between
display & NAVI control unit and GPS
boardPerform self-diagnosis to confirm
whether the display & NAVI control unit
is malfunctioning or not. If no failure is
detected, a momentary and/or tempo-
rary malfunction may have been caused
by strong electromagnetic wave interfer-
ence.EL-397 GPS transmission cable malfunc-
tion
GPS input line connection error
GPS TCXO overThe transmission circuit of the GPS
board frequency synchronization oscilla-
tor (inside the display & NAVI control
unit) is sending an oscillation frequency
that is greater or less than the set value.A location error occurs. Strong electro-
magnetic wave interference may have
occurred. The GPS antenna may be in a
very hot or very cold environment. This
is usually a temporary malfunction.Ð
GPS TCXO under
GPS ROM malfunction
Internal malfunction of GPS board RAM
or ROM inside the display & NAVI con-
trol unit.Perform self-diagnosis to confirm
whether the display & NAVI control unit
is malfunctioning or not. If no failure is
detected, a momentary and/or tempo-
rary malfunction may have been caused
by strong electromagnetic wave interfer-
ence.EL-397 GPS RAM malfunction
GPS RTC malfunctionMalfunction of GPS board clock IC
inside the display & NAVI control unit.
GPS antenna disconnected ÐPerform self-diagnosis to confirm GPS
antenna connection. If no failure is
detected, a momentary and/or tempo-
rary malfunction may have been caused
by a strong impact.EL-405
Low voltage of GPSPower supply voltage for GPS board
inside the display & NAVI control unit is
low.1. Check power supply circuits for dis-
play & NAVI control unit.EL-417
2. Perform self-diagnosis to confirm
GPS antenna connection.EL-397
3. If above diagnosis results are OK, a
momentary and/or temporary malfunc-
tion may have been caused by a strong
impact.Ð
CD-ROM communication errorCD-ROM driver malfunction (inside the
display & NAVI control unit)Perform self-diagnosis to confirm
whether the display & NAVI control unit
is malfunctioning or not. If no failure is
detected, a momentary and/or tempo-
rary malfunction may have been caused
by strong electromagnetic wave interfer-
ence.EL-397
NAVIGATION SYSTEM
Confirmation/Adjustment Mode (Cont'd)
EL-402

ªADJUST THE ANGLEº MODE=NBEL0232S07DescriptionNBEL0232S0701If the display indicates a larger or smaller turning angle than the
actual turning angle, the gyro (angular speed sensor) sensing val-
ues must be checked.
In case that the vehicle on the display makes larger angle turn than
reality, touch ªþº. In case that the vehicle on the display makes
smaller angle turn than reality, touch ª+º.
SEL584X
How to PerformNBEL0232S07021. Start the engine.
2. Push both ªMAPº and ªD/Nº switches at the same time for more
than 5 seconds.
3. Touch ªConfirmation/ adjustmentº.
SEL588X
4. Touch ªNavigationº.
SEL589X
5. Touch ªAdjust the angleº.
SEL596X
6. Touch ªLeft Turnº to adjust the angle to the left. Touch ªRight
Turnº to adjust the angle to the right.
7. Touch ª+º to increase the angle change coefficient or ªþº to
reduce the angle change coefficient.
8. Touch ªSetº to save the changed values in memory.
9. Then the vehicle turning angle on the display has adjusted.
NAVIGATION SYSTEM
Confirmation/Adjustment Mode (Cont'd)
EL-408

DRIVING TEST=NBEL0234S03During the driving test, diagnose the system by checking the dif-
ference of symptoms with each sensor ON or OFF.
Test pattern 1
Test method in which current position adjustment is not made
according to GPS data.
IRemove the GPS antenna connector from the display & NAVI
control unit. Drive the vehicle.
Before driving the vehicle, perform ªADJUST CURRENT
LOCATIONº (EL-411).
Test pattern 2
Test procedure in which map matching is not used.
IBefore driving the vehicle, perform ªADJUST CURRENT
LOCATIONº (EL-411). With the ignition switch OFF and the
map CD-ROM removed from the display & NAVI control unit,
drive the vehicle. After driving the vehicle, reinstall the map
CD-ROM. Compare the saved driving tracks for the vehicle's
current location with roads on the map.
Example
when driving in the same area. Determine if this is the result of the
map matching function or the GPS function.>
,Perform test pattern 1.
display>
,Perform test patterns 1 and 2.
ICompare the map and the saved driving tracks. The precision
of the saved driving tracks is within several hundred meters.

,Perform test patterns 1 and 2.
IMake adjustments by driving the vehicle over a known course
(highway or other road where distances are clearly marked).
Calibrate the distance against the known distance. Use the
formula below.
Calibration value = Screen display distance/Actual distance
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NAVIGATION SYSTEM
Trouble diagnoses (Cont'd)
EL-419

Possible cause Drive condition Service procedure
Opera-
tionDriving immediately after starting engine.The gyro (angular velocity sensor)
needs about 15 seconds after the
engine is started to precisely sense
the angular velocity. Directional
sensing errors will occur if the
vehicle is moved immediately after
starting the engine. The position
marker may indicate inaccurate
position.Wait a few moments between
starting the engine and actually
driving the vehicle.
Continuous driving for long distances (non-stop)When the vehicle is driven continu-
ously without stopping over a long
distance, errors in directional sens-
ing may occur. The position marker
may indicate inaccurate position.Stop the vehicle. Perform
ªSPEED CALIBRATIONº (EL-
409).
Rough or violent drivingWheel spinning (peeling out) or simi-
lar rough driving techniques can
adversely affect sensing accuracy.
The position marker may indicate
inaccurate position.If the position marker does not
move to the correct position
even after the vehicle has been
driven approximately 10 km (6
miles), perform ªADJUST CUR-
RENT LOCATIONº (EL-411).
Posi-
tional
calibra-
tion pro-
ceduresPositional calibration precision
SEL701V
If current vehicle location is roughly
set, the system may be unable to
locate the road that the vehicle is
traveling on. (This is especially true
in an area where there are many
roads.)Perform ªADJUST CURRENT
LOCATIONº (EL-411) within a
precision standard of 1 mm
(0.04 in) on the display.
Note: During calibration, use
the most detailed map pos-
sible.
Position calibration direction
SEL702V
When calibrating the position, check
the vehicle direction. If the vehicle
direction is not correct, subsequent
precision of current location will be
affected.Perform ªADJUST CURRENT
LOCATIONº, refer to EL-411.
NAVIGATION SYSTEM
This Condition is Not Abnormal (Cont'd)
EL-426

Possible cause:
Ð: Vehicle running ---: IndicationDrive condition Service procedure
Loca-
tionParking lot or similar area
SEL709V
When the vehicle is driven in a park-
ing lot or similar area, such as in an
area not normally marked as a road
on map, during map matching, the
system may select nearby roads.
This error may continue after the
vehicle exits the parking area and
begins to run on ordinary roads.
Vehicle operation in a parking area
may involve frequent turns and up
and/or down operation. Directional
sensing errors may occur leading to
subsequent route and position mis-
takes.
Turntable
SEL710V
When the ignition switch is OFF (the
usual situation when the vehicle is
on a turntable), the navigation sys-
tem receives no data from the gyro
(angular velocity sensor). When the
turntable rotates, no directional
change is sensed. During subse-
quent vehicle operation, directional
and route errors may occur.
Position marker displays a completely different location
In circumstances such as those described below, GPS signal reception conditions may result in an erroneous
position of the position marker. Perform ªADJUST CURRENT LOCATIONº (EL-411).
NOTE:
IWhen GPS satellite signal reception conditions are poor, the position of position marker may be errone-
ous. If correction is not made immediately, the position marker error will be compounded and a completely
different location will be indicated. In an area where GPS satellite signal reception conditions are good,
the system can be returned to normal operation.
IThe vehicle is driven aboard a car ferry or is towed for some distance with the ignition switch OFF. Vehicle
movement is not sensed. Current location calculations do not occur and current location data does not
appear on the display screen. Use GPS to accurately determine actual vehicle position. The system can
be returned to normal operation when the GPS satellite signal reception conditions are good.
Position marker jumps
In circumstances such as those described below, the position marker may jump as a result of automatic cur-
rent location corrections made by the system.
During map matching
IDuring map matching, the position marker may jump from one spot to another. In this case, it may be cor-
rected to a wrong road or to an area where no road exist.
GPS location correcting
IVehicle current location is sensed using the GPS data. Positional calibration is performed. The position
marker continues to be in the wrong position. It may jump about from one area of the screen to another.
In this case, it may be corrected to a wrong road or to an area where no road exist.
Position marker indicates that the vehicle is in the middle of an ocean or large river
The navigation system does not distinguish between land and water surfaces. In some cases, a position
marker error may cause the display to show the vehicle above a water surface.
Position of position marker varies when the vehicle is repeatedly operated on the same road
Driving lane and steering wheel movement results in a variety of different positions of the position mark when
traveling on the same road based on sensing results by the GPS antenna and gyro (angular velocity sensor).
Slow locational correction using map matching
IThe map matching function requires verification of local data. To make the map matching function, some
distance needs to be driven.
IThe map matching function may not provide accurate performance in an area where there are numerous
parallel roads. Until the system judges the road characteristics, an incorrect position may be shown.
NAVIGATION SYSTEM
This Condition is Not Abnormal (Cont'd)
EL-428

NBEL0145
Use the chart below to find out what each wiring
diagram code stands for.
Refer to the wiring diagram code in the alphabetical
index to find the location (page number) of each
wiring diagram.
Code Section Wiring Diagram Name
1STSIG AT A/T 1ST Signal
2NDSIG AT A/T 2ND Signal
3RDSIG AT A/T 3RD Signal
4THSIG AT A/T 4TH Signal
A/C, A HA Auto Air Conditioner
AAC/V EC IACV-AAC Valve
ABS BR Anti-lock Brake System
AP/SEN EC Absolute Pressure Sensor
ASCD EL Automatic Speed Control Device
AT/C EC A/T Control
ATDIAG EC A/T Diagnosis Communication
Line
AT/IND EL A/T Indicator Lamp
AUDIO EL Audio
AUT/DP EL Automatic Drive Positioner
BA/FTS AT A/T Fluid Temperature Sensor
and TCM Power Supply
BACK/L EL Back-up Lamp
BYPS/V EC Vacuum Cut Valve Bypass Valve
CHARGE SC Charging System
CHIME EL Warning Chime
CIGAR EL Cigarette Lighter
CLOCK EL Clock
COMPAS EL Compass and Thermometer
D/LOCK EL Power Door Lock
DEF EL Rear Window Defogger
DTRL EL Headlamp Ð With Daytime Light
System Ð
ECTS EC Engine Coolant Temperature Sen-
sor
ENGSS AT Engine Speed Signal
F/FOG EL Front Fog Lamp
F/LID EL Fuel Lid Opener
F/PUMP EC Fuel Pump Control
FICD EC IACV-FICD Solenoid Valve
FLS1 EC Fuel Gauge
Code Section Wiring Diagram Name
FLS2 EC Fuel Gauge
FLS3 EC Fuel Gauge
FTS AT A/T Fluid Temperature Sensor
FUELLH EC Fuel Injection System Function
(Left Bank)
FUELRH EC Fuel Injection System Function
(Right Bank)
H/AIM EL Headlamp Aiming Control System
H/LAMP EL Headlamp
HORN EL Horn
HSEAT EL Heated Seat
IATS EC Intake Air Temperature Sensor
IGN/SG EC Ignition Signal
ILL EL Illumination
INJECT EC Injector
INT/L EL Interior, Spot, Vanity Mirror, and
Luggage Room Lamps
IVC-L EC Intake Valve Timing Control Sole-
noid Valve LH
IVC-R EC Intake Valve Timing Control Sole-
noid Valve RH
IVCS EL INFINITI Communicator
IVCS-L EC Intake Valve Timing Control Posi-
tion Sensor LH
IVCS-R EC Intake Valve Timing Control Posi-
tion Sensor RH
KS EC Knock Sensor
LAN AT A/T Communication Line
LOAD EC Electrical Load Signal
LPSV AT Line Pressure Solenoid Valve
MAFS EC Mass Air Flow Sensor
MAIN AT Main Power Supply and Ground
Circuit
MAIN EC Main Power Supply and Ground
Circuit
METER EL Speedometer, Tachometer, Temp.,
Oil, and Fuel Gauges
MIL/DL EC MIL and Data Link Connectors
MIRROR EL Door Mirror
MULTI EL Multi-remote Control System
NATS EL IVIS (Infiniti Vehicle Immobiliser
System)
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WIRING DIAGRAM CODES (CELL CODES)
EL-457

Code Section Wiring Diagram Name
NAVI EL Navigation System
NONDTC AT Non-detectable Items
O2H1B1 EC Heated Oxygen Sensor 1 Heater
(Front) (Bank 1)
O2H1B2 EC Heated Oxygen Sensor 1 Heater
(Front) (Bank 2)
O2H2B1 EC Heated Oxygen Sensor 2 Heater
(Rear) (Bank 1)
O2H2B2 EC Heated Oxygen Sensor 2 Heater
(Rear) (Bank 2)
O2S1B1 EC Heated Oxygen Sensor 1 (Front)
(Bank 1)
O2S1B2 EC Heated Oxygen Sensor 1 (Front)
(Bank 2)
O2S2B1 EC Heated Oxygen Sensor 2 (Rear)
(Bank 1)
O2S2B2 EC Heated Oxygen Sensor 2 (Rear)
(Bank 2)
OVRCSV AT Overrun Clutch Solenoid Valve
P/ANT EL Power Antenna
PGC/V EC EVAP Canister Purge Volume
Control Solenoid Valve
PHASE EC Camshaft Position Sensor
(PHASE)
PNP/SW EC Park/Neutral Position Switch
PNP/SW AT Park/Neutral Position Switch
POS EC Crankshaft Position Sensor
(CKPS) (POS)
POWER EL Power Supply Routing
PRE/SE EC EVAP Control System Pressure
Sensor
PST/SW EC Power Steering Oil Pressure
Switch
REF EC Crankshaft Position Sensor
(CKPS) (REF)
REMOTE EL Audio (Remote Control Switch)
RP/SEN EC Refrigerant Pressure
S/SIG EC Start Signal
S/VCSW EC Swirl Control Valve Control
Vacuum Check Switch
SEAT EL Power Seat
SHIFT AT A/T Shift Lock System
SROOF EL Sunroof
SRS RS Supplemental Restraint SystemCode Section Wiring Diagram Name
SSV/A AT Shift Solenoid Valve A
SSV/B AT Shift Solenoid Valve B
START SC Starting System
STOP/L EL Stop lamp
SWL/V EC Swirl Control Valve Control Sole-
noid Valve
TAIL/L EL Parking, License and Tail Lamps
TCCSIG AT A/T TCC Signal (Lock up)
TCV AT Torque Converter Clutch Solenoid
Valve
T/F TF Transfer
TFTS EC Tank Fuel Temperature Sensor
THEFT EL Theft Warning System
TLID EL Glass Hatch Opener
TP/SW EC Throttle Position Switch
TPS AT Throttle Position Sensor
TPS EC Throttle Position Sensor
TRNSMT EL Integrated HOMELINKYTrans-
mitter
TRSA/T AT Turbine Revolution Sensor
TURN EL Turn Signal and Hazard Warning
Lamps
VIAS/V EC Variable Induction Air Control Sys-
tem
VSS EC Vehicle Speed Sensor
VSSA/T AT Vehicle Speed Sensor A/T (Revo-
lution Sensor)
VSSMTR AT Vehicle Speed Sensor MTR
WARN EL Warning Lamps
WINDOW EL Power Window
WIP/R EL Rear Wiper and Washer
WIPER EL Front Wiper and Washer
WIRING DIAGRAM CODES (CELL CODES)
EL-458