ignition INFINITI QX4 2001 Factory Service Manual

Self-diagnosis ModeNBEL0231APPLICATION ITEMSNBEL0231S01
Mode DescriptionReference
page
Self DiagnosisSelf-diagnosis for display & NAVI control unit, CD-ROM
and GPS antenna connection.EL-398
Confirmation/
adjustmentDisplay Diagnosis Color and gray gradation of display can be checked in
this mode.EL-406
Diagnostic Signals from the Car Several input signals to display & NAVI control unit, can
be monitored in this mode.EL-404
NavigationCheck the map CD-
ROM versionThe version (parts number) of inserted CD-ROM can be
checked in this mode.EL-405
Error history Diagnosis results previously stored in the memory
(before turning ignition switch ON) are displayed in this
mode. Time and location when/where the errors
occurred are also displayed.EL-400
Longitude & Latitude Display the map. Use the joystick to adjust position. Lon-
gitude and latitude will be displayed.EL-407
Adjust the angle Turning angle of the vehicle on the display can be
adjusted in this mode.EL-408
Speed CalibrationUnder ordinary conditions, the navigation system dis-
tance measuring function will automatically compensate
for minute decreases in wheel and tire diameter caused
by tire wear or low pressure. Speed calibration immedi-
ately restores system accuracy in cases such as when
distance calibration is needed because of the use of tire
chains in inclement weather.EL-409
Initialize Location This mode is for initializing the current location. Use
when the vehicle is transported a long distance on a
trailer, etc.EL-433
SEL583X
HOW TO PERFORM SELF-DIAGNOSIS MODENBEL0231S021. Start the engine.
2. Push both of ªMAPº and ªD/Nº switches at the same time for
more than 5 seconds.
SEL584X
3. Touch ªSelf Diagnosisº or ªConfirmation/ adjustmentº.
IFor further procedure, refer to the following pages which
describe each application item of the self-diagnosis mode.
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NAVIGATION SYSTEM
Self-diagnosis Mode
EL-397

ªDIAGNOSTIC SIGNALS FROM THE CARº MODE=NBEL0232S03DescriptionNBEL0232S0301In ªDiagnostic Signals From the Carº mode, following input signals
to the display & NAVI control unit can be checked on the display.
Item Indication Vehicle condition
Vehicle
Speed*ON Vehicle speed is greater than 0 km/h (0 MPH).
OFF Vehicle speed is 0 km/h (0 MPH).
LightON Lighting switch is in 1st or 2nd position.
OFF Lighting switch is in ªOFFº position.
IGNON Ignition switch is in ªONº position.
OFF Ignition switch is in ªACCº position.
REVERSE*ON Selector/shift lever is in ªReverseº position.
OFFSelector/shift lever is in other than ªReverseº posi-
tion.
*: When ignition switch is in ªACCº position, indication will be changed to ª-º.
SEL584X
How to PerformNBEL0232S03021. 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 ªDiagnostic Signals from the Carº.
SEL591X
5. Then ªDiagnostic Signals from the Carº mode is performed.
NAVIGATION SYSTEM
Confirmation/Adjustment Mode (Cont'd)
EL-404

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

SEL693VD
POWER SUPPLY AND GROUND CIRCUIT CHECK FOR
DISPLAY & NAVI CONTROL UNIT
=NBEL0234S04Power Supply Circuit CheckNBEL0234S0401
Terminal Ignition switch
(+) (þ) OFF ACC ON
1 Ground Battery voltage Battery voltage Battery voltage
2 Ground Battery voltage Battery voltage Battery voltage
5 Ground 0V 0V Battery voltage
6 Ground 0V Battery voltage Battery voltage
If NG, check the following.
I7.5A fuse [No. 11, located in the fuse block (J/B)]
I10A fuse [No. 10, located in the fuse block (J/B)]
I15A fuse [No. 4, located in the fuse block (J/B)]
IHarness for open or short between fuse and display & NAVI
control unit
SEL694VD
Ground Circuit CheckNBEL0234S0402
Terminals Continuity
3 - Ground Yes
4 - Ground Yes
NAVIGATION SYSTEM
Trouble diagnoses (Cont'd)
EL-420

VOICE GUIDE OPERATION CHECK=NBEL0234S05
1 PRELIMINARY CHECK
1. Turn ignition switch to ACC position.
2. Insert the music CD into the radio and CD player.
3. Try to play the music CD.
Is the sound emitted from all speakers?
YesorNo
Ye s©GO TO 2.
No©Repair or replace audio system.
Refer to ªAUDIOº in EL-160.
2 CHECK NAVI OPERATION ON SIGNAL
1. Disconnect audio unit connector.
2. Push ªVOICEº button.
3. Check voltage between terminal 28 and ground.
SEL645XA
OK or NG
OK©GO TO 3.
NG©Repair or replace harness or NAVI control unit.
3 CHECK VOICE SIGNAL CIRCUIT
1. Push ªVOICEº button.
2. Check voltage between NAVI control unit terminal 30 or 31 and ground.
SEL648X
OK or NG
OK©GO TO 4.
NG©Repair or replace NAVI control unit.
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NAVIGATION SYSTEM
Trouble diagnoses (Cont'd)
EL-421

4 CHECK VOICE SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector and AUDIO unit connector.
3. Check continuity between NAVI control unit terminal 30 and AUDIO unit terminal 36.
4. Check continuity between NAVI control unit terminal 31 and AUDIO unit terminal 34.
SEL649X
YesorNo
Ye s©Repair or replace audio system.
Refer to ªAUDIOº in EL-160.
No©Repair or replace harness or connector.
NAVIGATION SYSTEM
Trouble diagnoses (Cont'd)
EL-422

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

GPS signal reception conditions are good. However, the position mark does not return to its proper
position.
Ihe system senses the vehicle location with an error of approximately 100 m (328 ft). Due to the limitation
of precision, the position marker may be inaccurate even if the GPS signal reception condition is good.
IThe navigation system uses GPS data to determine vehicle location. GPS data is compared with other
locational sensing data during the map matching process. The system decides which data is more pre-
cise and uses that data.
IWhen the vehicle is stationary, GPS data cannot be used to make system corrections.
Area designations on the map display and the BIRDVIEWTdisplay differ.
To prevent the display from becoming congested, alphanumeric information is abridged.
[No problem]
Correct position of your vehicle is not displayed.
Vehicle position changed after ignition key was turned to the OFF position (Vehicle is transported on car ferry,
car train, or by some other means).
[Operate vehicle for short time under GPS receiving conditions.]
The display does not change to night-time mode even though the light switch has been turned ON.
Lights have been turned on. In ªDISPLAY CHANGEº mode, night-time mode on display has been switched to
day-time mode and still is.
[Turn lights on again. Set the display to night-time mode. Refer to EL-412.]
Map does not scroll even though the position of your vehicle is changed.
Present area does not appear on the display.
[Press the ªMAPº switch.]
Vehicle position marker does not appear.
Present area does not appear on the display.
[Press the ªMAPº switch.]
The map surface precision display (GPS satellite marker) still remains gray.
Vehicle is parked inside a building or in the shadow of a large building. This intercepts the GPS signal.
[Move the vehicle to a more open position.]
GPS signal is not received because objects are placed on the rear parcel shelf.
[Remove objects from the rear parcel shelf.]
GPS satellite position is bad.
[Wait until GPS satellite position improves.]
Vehicle position precision is bad.
The map surface precision display (GPS satellite marker) still remains gray.
[Refer to ªThe map surface precision display (GPS satellite marker) still remains grayº item (Symptoms)]
Vehicle speed and elapsed distance is calculated from the vehicle speed pulse. This pulse is dependent upon
tire size. If tire chains are used on the vehicle, accuracy will be affected (pulse rate will be too fast or too slow).
The same is true if the system installed to your vehicle is removed and installed on another vehicle.
[Drive the vehicle at a speed higher than 30 km/h (19 MPH) for approximately 30 minutes. Automatic read-
justment should occur. If it does not (remains too fast or too slow), distance calibration is required. Or, drive
the vehicle for a short distance. Perform ªSPEED CALIBRATIONº (EL-409). After removing the tire chains,
sensing accuracy may recover by itself.]
Bad map data or system defect (same error consistently occurs in the same area)
ROUTE SEARCH/ROUTE GUIDENBEL0235S03IIf the present location or the destination location is displayed in the avoid area, it is not possible to search
routes.
IIf the avoid area is set to wide range area, it may not be possible to find appropriate routes or search for
alternate routes.
IThe automatic re-route calculates a return to the original route. Because of this, it may not be possible to
search appropriate new routes. If you deviate from the original route and wish to select an appropriate new
route, touch ªRoute Calculationº.
IThe automatic re-route function may sometimes require considerable time.
IDisplayed route number and directional information at a highway junction may differ from the information
posted on the actual road signs.
IDisplayed street name information at a highway exit may differ from the information posted on the actual
road signs.
IStreet name information displayed on the enlarged intersection map may differ from the information posted
on the actual road signs.
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NAVIGATION SYSTEM
This Condition is Not Abnormal (Cont'd)
EL-429

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

Removal and InstallationNBEM0006
SEM483G
1. Intake manifold collector support
2. Lower intake manifold collector
3. Fuel damper and fuel feed hose
assembly
4. Injector
5. Fuel tube assembly6. Fuel pressure regulator
7. Ignition coil with power transistor
8. Upper intake manifold collector
9. Intake manifold
10. Throttle body11. IACV-AAC valve
12. EVAP canister purge volume con-
trol solenoid valve
13. Swirl control valve
14. Variable induction air control valve
control actuator
OUTER COMPONENT PARTS
Removal and Installation
EM-10