ignition INFINITI QX56 2006 Factory Service Manual

AV-110
NAVIGATION SYSTEM
Revision: November 20092006 QX56
35 O/B Combination switch output 2
ONLighting, turn, wiper OFF
Wiper dial position 4
36 R/W Combination switch output 1
38 W/L Ignition switch (ON) ON— Battery voltage
39 L CAN-H —— —
40 P CAN-L —— —
57 Y/R Battery power supply OFF— Battery voltage
67 B Ground ON— 0V
70 W/B Battery power supply (fusible link) OFF —Battery voltage
Terminal
No. Wire
color Signal name Measuring condition
Reference value
(Approx.)
Ignition
switch Operation or condition
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On Board Self-Diagnosis FunctionEKS00BJP
DESCRIPTION

Diagnosis function consists of the self-diagnosis mode performed automatically and the CONFIRMATION/
ADJUSTMENT mode operated manually.

Self-diagnosis mode checks for connections between the units constituting this system, analyzes each
individual unit at the same time, and displays the results on the LCD screen.

CONFIRMATION/ADJUSTMENT mode is used to perform trouble diagnosis that require operation and
judgment by an operator (trouble that cannot be automatically judged by the system), to check/change the
set value, and to display the History of Errors of the navigation system.
DIAGNOSIS ITEM
NOTE:
Make the status that is set by D/N function be shown.
ModeDescription
Self-diagnosis (DCU) Display control unit diagnosis.
Self-diagnosis (NAVI)

NAVI Control unit diagnosis (DVD-ROM drive) will not be diagnosed
when no map DVD-ROM is in it.

Analyzes connection between the NAVI control unit and the GPS
antenna and operation of each unit.
CONFIRMATION/
ADJUSTMENT Display diagnosis
In display control unit mode, color tone and shading of the screen can be
checked by the display of a color bar and a gray scale.
Vehicle signals In display control unit mode, analyzes the following vehicle signals: Vehi-
cle speed signal, light signal
NOTE , ignition switch signal, and reverse sig-
nal.
Auto Climate Control A/C self-diagnosis of A/C system.
Navigation Display diagnosis
In NAVI C/U mode, color tone and shading of the screen can be checked
by the display of a color bar and a gray scale.
Vehicle signals In NAVI C/U mode, analyzes the following vehicle signals: Vehicle speed
signal, light signal, ignition switch signal, and reverse signal.
History of Errors 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.
Naviga-
tion Display Lon-
gitude & Lat-
itude
Display the map. Use the joystick to adjust position. Longitude and latitude
will be displayed.
Speed Cali-
bration Under ordinary conditions, the navigation system distance measuring
function will automatically compensate for minute decreases in wheel and
tire diameter caused by tire wear or low-pressure. Speed calibration imme-
diately restores system accuracy in cases such as when distance calibra-
tion is needed because of the use of tire chains in inclement weather.
Angle
adjustment Corrects difference between actual turning angle of a vehicle and turning
angle of the car mark on the display.
Initialize
Location This mode is for initializing the current location. Use when the vehicle is
transported a long distance on a trailer, etc.
CAN DIAG SUPPORT MONITOR Display status of CAN communication.

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6. When the self-diagnosis completes, optional part confirmation
screen will be shown.

When connection of an optional part is judged error, a screen
to check if the optional part is actually fitted on the vehicle or
not will be shown. When fitted, select the switch of the part on
the screen and press “End”. Then the “SELF DIAGNOSIS”
screen will be shown.

When the optional part is connected normally, the switch for
the part will not appear on the screen.
7. On the “SELF DIAGNOSIS ” screen, each unit name will be col-
ored according to the diagnosis result, as follows.

If several malfunctions are present in a unit, color of its switch
on the screen will be either red, yellow, or gray, determined by
the malfunction of the highest priority.
8. Select a switch on the “SELF DIAGNOSIS ” screen and com-
ments for the diagnosis results will be shown.

When the switch is green, the following comment will be
shown. “Self-diagnosis was successful. Further diagnosis and
adjustments are recommended. Follow the “confirmation/
adjustment ” menu or refer to the service manual. ”

When the switch is yellow, the following comment will be
shown. “Connection to the following unit is abnormal. See the
service manual for further details ”.

When the switch is red, the following comment will be shown.
“DCU is abnormal”.
SELF–DIAGNOSIS RESULT
Quick reference table
1. Select a malfunctioning diagnosis No. in the diagnosis result quick reference table.
2. Find estimated malfunctioning system in the diagnosis No. table and perform check by referring to AV- 9 7 ,
"Wiring Diagram — COMM —" .
3. Turn the ignition switch OFF and perform self-diagnosis again.
*: DCU = Display control unit
CAUTION:

When AV switch has a malfunction, you cannot start. Refer to AV- 1 5 5 , "Unable to Operate All of AV
Switches (Unable to Start Self-Diagnosis)" .

When display unit has a malfunction, you cannot start. Refer to AV- 1 5 3 , "Screen is Not Shown" .
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Green : Not malfunctioning.
Yellow : Cannot be judged by self-diagnosis results.
Red : Unit is malfunctioning.
Gray : Diagnosis has not been done.
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Screen switch
Diagnosis No.
Switch color DCU* DISPLAY Audio unit Navigation GPS
antenna
Red × 1
Gray ×
x2
xx 3
×× ×4

NAVIGATION SYSTEMAV-115
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5. Perform self-diagnosis by selecting the “Self-diagnosis (NAVI)”.

Self-diagnosis subdivision screen will be shown and the oper-
ation enters the self-diagnosis mode.

A bar graph will be shown on the screen to indicate progress
of the diagnosis.
6. On the “SELF DIAGNOSIS ” screen, each unit name will be col-
ored according to the diagnosis result, as follows.

If several malfunctions are present in a unit, color of its switch
on the screen will be either red, yellow, or gray, determined by
the malfunction of the highest priority.
7. Select a switch on the “SELF DIAGNOSIS ” screen and com-
ments for the diagnosis results will be shown.

When the switch is green, the following comment will be
shown. “Connection is normal. Please refer to the Confirma-
tion / Adjustment function or service manual for more detailed
diagnosis information."

When the switch is yellow, the following comment will be
shown. “Connection to the following unit is abnormal. See the
service manual for further details ”.

When the switch is red, the following comment will be shown.
“Center Control Unit is abnormal”.

When the switch is gray, the following comment will be shown. “Self-diagnosis for DVD-ROM DRIVER
of NAVI was not conducted because no DVD-ROM was available. ”
SELF–DIAGNOSIS RESULT
Quick reference table
1. Select an malfunctioning diagnosis No. in the diagnosis result quick reference table.
2. Find estimated malfunctioning system in the diagnosis No. table and perform check by referring to AV- 9 7 ,
"Wiring Diagram — COMM —" .
3. Turn the ignition switch OFF and perform self-diagnosis again.
*: Center Control unit = NAVI control unit
CAUTION:

When AV switch has a malfunction, you cannot start. Refer to AV- 1 5 5 , "Unable to Operate All of AV
Switches (Unable to Start Self-Diagnosis)" .
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Green : Not malfunctioning.
Yellow : Cannot be judged by self-diagnosis results.
Red : Unit is malfunctioning.
Gray : Diagnosis has not been done.
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Screen switch Diagnosis No.
Switch color Center control unit* GPS antenna
Red × 1
Gray × 2
Yellow ×
3
× 4
×× 5

AV-118
NAVIGATION SYSTEM
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DISPLAY DIAGNOSIS

When RGB signal error occurred in the RGB system, tone of the color bar will change as follows.

When the color of the screen looks unusual, refer to AV- 1 4 6 , "Color of RGB Image is Not Proper (All
Screens Look Bluish)" , AV- 1 4 7 , "Color of RGB Image is Not Proper (All Screens Look Reddish)" and
AV- 1 4 8 , "
Color of RGB Image is Not Proper (All Screens Look Yellowish)" .
VEHICLE SIGNALS

A comparison check can be made of each actual vehicle signal
and the signals recognized by the system.
CAUTION:
In case of confirming light signal, set D/N mode to ON/OFF
of lighting switch (normal setting).

OFF: D (Day mode)

ON: N (Night mode)
Unless above setting, light signal (ON/OFF) may not be
accurately displayed.
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R (red) signal error : Screen looks bluish
G (green) signal error : Screen looks reddish
B (blue) signal error : Screen looks yellowish
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Diagnosis item Display Condition Remarks
Vehicle speed ON Vehicle speed > 0 km/h (0 MPH)
Changes in indication may be delayed by
approx. 1.5 seconds. This is normal.
OFF Vehicle speed = 0 km/h (0 MPH)
– Ignition switch in ACC position
Light ON Lighting switch ON
–
OFF Lighting switch OFF
IGN ON Ignition switch ON
–
OFF Ignition switch ACC
Reverse ON Selector lever in R position
Changes in indication may be delayed by
approx. 1.5 seconds. This is normal.
OFF Selector lever in other than R position
– Ignition switch in ACC position

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If vehicle speed is NG, refer to AV- 1 3 2 , "Vehicle Speed Signal Check for Display Control Unit" .

If light is NG, refer to AV- 1 3 3 , "Illumination Signal Check for Display Control Unit" .

If IGN is NG, refer to AV- 1 3 4 , "Ignition Signal Check for Display Control Unit" .

If reverse is NG, refer to AV- 1 3 4 , "Reverse Signal Check for Display Control Unit" .
NAVIGATION
1. The initial confirmation/adjustment screen will be shown, and
items “Display Diagnosis”, “Vehicle Signals”, “Navigation ”,
"Error History “ and "Delete Unit Connection Log ” will become
selective.
2. Select each switch on “CONFIRMATION/ADJUSTMENT ”
screen to display the relevant diagnosis screen.
DISPLAY DIAGNOSIS

When RGB signal error occurred in the RGB system, tone of the color bar will change as follows.

When the color of the screen looks unusual, refer to AV- 1 4 3 , "Color of RGB Image is Not Proper (Only
NAVI Screen Looks Bluish)" , AV- 1 4 4 , "Color of RGB Image is Not Proper (Only NAVI Screen Looks Red-
dish)" and AV- 1 4 5 , "Color of RGB Image is Not Proper (Only NAVI Screen Looks Yellowish)" .
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R (red) signal error : Screen looks bluish
G (green) signal error : Screen looks reddish
B (blue) signal error : Screen looks yellowish

AV-120
NAVIGATION SYSTEM
Revision: November 20092006 QX56
VEHICLE SIGNALS

A comparison check can be made of each actual vehicle signal
and the signals recognized by the system.
CAUTION:
In case of confirming light signal, set D/N mode to ON/OFF
of light switch (normal setting).

OFF: D (Day mode)

ON: N (Night mode)
Unless mode is in above setting, light signal (ON/OFF) may
not be accurately displayed.

If vehicle speed is NG, refer to AV- 1 3 1 , "Vehicle Speed Signal Check for NAVI Control Unit" .

If light is NG, refer to AV- 1 3 3 , "Illumination Signal Check for NAVI Control Unit" .

If IGN is NG, refer to AV- 1 3 3 , "Ignition Signal Check for NAVI Control Unit" .

If reverse is NG, refer to AV- 1 3 4 , "Reverse Signal Check for NAVI Control Unit" .
ERROR HISTORY
DIAGNOSIS BY ERROR HISTORY
The “Self-diagnosis ” results indicate whether an error occurred during the period from when the ignition switch
is turned to ON until “Self-diagnosis” is completed.
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Diagnosis item Display Condition Remarks
Vehicle speed ON Vehicle speed > 0 km/h (0 MPH)
Changes in indication may be delayed by
approx. 1.5 seconds. This is normal.
OFF Vehicle speed = 0 km/h (0 MPH)
– Ignition switch in ACC position
Lights ON Lighting switch ON
–
OFF Lighting switch OFF
Ignition ON Ignition switch ON
–
OFF Ignition switch ACC
Reverse ON Selector lever in R position
Changes in indication may be delayed by
approx. 1.5 seconds. This is normal.
OFF Selector lever in other than R position
– Ignition switch in ACC position
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If an error occurred before the ignition switch was turned to ON and does not occur again until the “Self-diag-
nosis ” is completed, the diagnosis result will be judged normal. Therefore, those errors in the past which can-
not be found by the “Self-diagnosis” must be found by diagnosing the “Error History”.
The Error History displays the time and place of the most recent occurrence of that error. However, take note
of the following points.

Correct time of the error occurrence may not be displayed when the GPS antenna substrate within the
NAVI control unit has malfunctioned.

Place of the error occurrence is represented by the position of the current-location mark at the time when
the error occurred. If the current-location mark has deviated from the correct position, then the place of
the error occurrence may be located correctly.

The maximum number of occurrences which can be stored is 50. For the 51st and later occurrences, the
displayed number remains 50.
When a reproducible malfunction occurred but its cause cannot be identified because several errors are
present, record the item, number and place (longitude/latitude) of error occurrence (or delete the Error His-
tory), then turn the ignition switch from OFF to ON to reproduce the malfunction. Check the Error History to
find the items which show an increased number of occurrences, and diagnose the item.
Error item Possible causes
Example of symptom
Action/symptom
Gyro sensor
disconnected Communications malfunction between NAVI control unit and inter-
nal gyro.

Navigation location detection performance
has deteriorated.
(Angular velocity cannot be detected.)
Perform self-diagnosis.

When the NAVI control unit is judged normal by self-diagnosis,
the symptom may be intermittent, caused by strong radio inter-
ference.
GPS discon-
nected Communication error between NAVI control unit and internal GPS
substrate.

Navigation location detection performance
has deteriorated.
(Location correction using GPS is not per-
formed.)

GPS receiving status remains gray.

Perform self-diagnosis.

When the NAVI control unit is judged normal by self-diagnosis,
the symptom may be intermittent, caused by strong radio inter-
ference.
GPS trans-
mission cable
malfunction Malfunctioning transmission wires to NAVI control unit and internal
GPS substrate.

During self-diagnosis, GPS diagnosis is not
performed.
Perform self-diagnosis.

When the NAVI control unit is judged normal by self-diagnosis,
the symptom may be intermittent, caused by strong radio inter-
ference.
GPS input
line connec-
tion error Malfunctioning receiving wires to NAVI control unit and internal
GPS substrate.

Navigation location detection performance
has deteriorated.
(Location correction using GPS is not per-
formed.)

GPS receiving status remains gray.

Perform self-diagnosis.

When the NAVI control unit is judged normal by self-diagnosis,
the symptom may be intermittent, caused by strong radio inter-
ference.
GPS TCX0
over
GPS TCX0
under Oscillating frequency of the GPS substrate frequency synchroniz-
ing oscillation circuit exceeded (or below) the specification

Navigation location detection performance
has deteriorated.
(Location correction using GPS is not per-
formed.)

GPS receiving status remains gray.

Perform self-diagnosis.

When the NAVI control unit is judged normal by self-diagnosis,
the symptom may be intermittent, caused by strong radio inter-
ference, or the control unit may have been subjected to exces-
sively high or low temperatures.
GPS ROM
malfunction
GPS RAM
malfunction Contents of ROM (or RAM) in GPS substrate are malfunctioning.

Location detection accuracy of the navigation
system will deteriorate, depending on the error
area in the memory, because GPS cannot
make correct positioning.
(Location correction using GPS is not per-
formed.)

Perform self-diagnosis.

When the NAVI control unit is judged normal by self-diagnosis,
the symptom may be intermittent, caused by strong radio inter-
ference.

AV-124
NAVIGATION SYSTEM
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CAN DIAG SUPPORT MONITOREKS00GE2
OPERATION PROCEDURE
1. Start the engine.
2. Turn the audio system off.
3. While pressing the “MEMORY 4” button, turn the volume control
dial clockwise or counterclockwise for 30 clicks or more. (When
the self-diagnosis mode is started, a short beep will be heard.)

Shifting from current screen to previous screen is performed
by pressing “BACK” button.
4. The initial self-diagnosis screen will be shown, and items “Self- Diagnosis (DCU) ”, “Self-Diagnosis (NAVI) ”, “Confirmation/
Adjustment” and “CAN DIAG SUPPORT MONITOR ” will
become selective.
5. Select “CAN DIAG SUPPORT MONITOR ”.
6. Display status of CAN communication.

If the ignition is turned on and UNKWN is shown on the screen, the value of the counter will be up.
(MAX50)

The value of the counter does not change if the ignition changes to OFF. (MAX50)

If the counter shows the value of 50 and UNKWN is shown, the value of 50 will not be changed.
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Item ContentError counter
CAN_COMM OK/NG0-50
CAN_CIRC_1 OK/UNKWN 0-50
CAN_CIRC_2 OK/UNKWN 0-50
CAN_CIRC_3 OK/UNKWN 0-50
CAN_CIRC_4 OK/UNKWN 0-50
CAN_CIRC_5 OK/UNKWN 0-50
CAN_CIRC_6 OK/UNKWN 0-50
CAN_CIRC_7 OK/UNKWN 0-50
CAN_CIRC_8 OK/UNKWN 0-50
CAN_CIRC_9 OK/UNKWN 0-50
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AV-126
NAVIGATION SYSTEM
Revision: November 20092006 QX56
Power Supply and Ground Circuit Check for NAVI Control UnitEKS00GE4
1. CHECK FUSE
Make sure the following fuses of the NAVI control unit are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect NAVI control unit connector B151.
2. Check voltage between connector terminals and ground as fol- lows.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between NAVI control unit and fuse.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between the following NAVI control unit con- nector terminals and ground.
OK or NG
OK >> Inspection End.
NG >> Repair or replace harness.
Terminals Power source Fuse No.
Connector Terminal
B151 2
Battery power 31
5 ACC/ON power 4
TerminalsIgnition switch position
(+) (– )OFFACCON
Connector Terminal
B151 2
Ground Battery
voltage Battery
voltage Battery
voltage
50 VBattery
voltage Battery
voltage
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Terminals Ignition switch Continuity
Connector Terminal—
B151 1Ground OFF Yes
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