INFINITI QX56 2007 Factory Service Manual

NAVIGATION SYSTEM
AV-91
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Terminal and Reference Value for Display Control unitINFOID:0000000003533714
Te r m i n a l N o .
(Wire color)
ItemSignal
input/
outputCondition
Vo l ta g e
(Approx.)Example of
symptom
+–Igni-
tion
switchOperation
1 (Y) GroundBattery Pow-
erInput OFF – Battery voltageSystem does not
work properly.
2 (L/W) GroundPower Supply
(Inverter) Output ON – 9 VScreen is not
shown.
3 (B) Ground Ground – ON – 0 V –
4 (L/R) GroundPower Supply
(Signal) Output ON – 9 VScreen is not
shown.
5 (P) Ground(Inverter)
Ground –ON – 0 V –
6 (GR) GroundReverse
signalInput ONSelector lever in R
positionBattery voltage
Impossible to
gain direction of
vehicle. Selector lever not in
R position0 V
7 (P/L) Ground(Signal)
Ground –ON – 0 V –
10 (O) Ground ACC signal Input ACC – Battery voltageSystem does not
work properly.
12 (G/R) Ground Ignition signal Input ON – Battery voltageVehicle informa-
tion setting is not
possible.
13 (B) Ground Ground – ON – 0 V –
14 (R/L) GroundIllumination
signalInput OFFLighting switch posi-
tion 1st or 2ndBattery voltageDisplay unit
does not change
when lighting
switch is turned
to 1st position. Lighting switch posi-
tion OFF0 V
16 (W/R) GroundVehicle
speed signal
(8–pulse)Input ONWhen vehicle speed
is approx. 40 km/h
(25 MPH)Value of vehicle
speed informa-
tion is not accu-
rately displayed.
25 (L) – CAN-H – – – – –
26 (P) – CAN-L – – – – –
28 (V) GroundCommunica-
tion signal (+)Input/
OutputON –System does not
work properly.
29 – Shield ground – – – – –
SKIA0168E
SKIA0175E

AV-92
< SERVICE INFORMATION >
NAVIGATION SYSTEM
30 (LG) GroundCommunica-
tion signal (–)Input/
outputON –System does not
work properly.
32 (L) GroundCommunica-
tion signal (+)Input/
outputON –System does not
work properly.
33 – Shield ground – – – – –
34 (P) GroundCommunica-
tion signal (–)Input/
outputON –System does not
work properly.
36 (B/W) 37Display Com-
munication
signal
(DCU-DSP)Output ONPress the “TRIP”
button.Though a screen
is displayed, it is
impossible to ad-
just brightness.
37 – Shield ground – – – – –
38 (L) 37Display Com-
munication
signal
(DSP-DCU)Input ONPress the “TRIP”
button.Though a screen
is displayed, it is
impossible to ad-
just brightness.
39 – Shield ground – – – – –
40 (O/L) GroundAudio TX
Communica-
tion signalOutput ONOperate audio
volume.Audio does not
operate properly.
41 – Shield ground – – – – –Te r m i n a l N o .
(Wire color)
ItemSignal
input/
outputCondition
Voltag e
(Approx.)Example of
symptom
+–Igni-
tion
switchOperation
SKIA0176E
SKIA0175E
SKIA0176E
SKIA4364E
SKIA4363E
SKIA4402E

NAVIGATION SYSTEM
AV-93
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42 (W/L) GroundAudio RX
communica-
tion signalInput ONOperate audio
volume.Audio does not
operate properly.
43 (W) 41RGB syn-
chronizing
signalInput ONPress the “MAP”
button.NAVI screen is
rolling.
44 (R/L) 45RGB signal
(R: red)Input ONSelect “Display Di-
agnosis (NAVI)” of
CONFIRMATION/
ADJUSTMENT
function.NAVI screen
looks bluish.
45 – Shield ground – – – – –
46 (R/W) 45RGB signal
(G: green)Input ONSelect “Display Di-
agnosis (NAVI)” of
CONFIRMATION/
ADJUSTMENT
function.NAVI screen
looks reddish.
47 – Shield ground – – – – –
48 (B) 45RGB signal
(B: blue)Input ONSelect “Display Di-
agnosis (NAVI)” of
CONFIRMATION/
ADJUSTMENT
function.NAVI screen
looks yellowish.
49 – Shield ground – – – – –
50 (R/L) 47RGB signal
(R: red)Output ONSelect “Display Di-
agnosis (DCU)” of
CONFIRMATION/
ADJUSTMENT
function.NAVI screen
looks bluish. Te r m i n a l N o .
(Wire color)
ItemSignal
input/
outputCondition
Vo l ta g e
(Approx.)Example of
symptom
+–Igni-
tion
switchOperation
SKIA4403E
SKIA0164E
SKIA4977E
SKIA4978E
SKIA4979E
SKIA4980E

AV-94
< SERVICE INFORMATION >
NAVIGATION SYSTEM
51 (B) 49RGB area
(YS) signalOutput ONPress the“TRIP”
button.RGB screen is
not shown.
52 (R/W) 47RGB signal
(G: green)Output ONSelect “Display Di-
agnosis (DCU)” of
CONFIRMATION/
ADJUSTMENT
function.Screen looks
reddish.
53 (W) 49Vertical syn-
chronizing
(VP) signalInput ON –Operating
screen for audio
and A/C is not
displayed when
showing NAVI
screen.
54 (B) 47RGB signal
(B: blue)Output ONSelect “Display Di-
agnosis (DCU)” of
CONFIRMATION/
ADJUSTMENT
function.Screen looks
yellowish.
55 (R) 49Horizontal
synchroniz-
ing (HP) sig-
nalInput ON –Operating
screen for audio
and A/C is not
displayed when
showing NAVI
screen.
56 (G) 49RGB syn-
chronizing
signalOutput ONPress the “TRIP”
button.NAVI screen is
rolling. Te r m i n a l N o .
(Wire color)
ItemSignal
input/
outputCondition
Voltag e
(Approx.)Example of
symptom
+–Igni-
tion
switchOperation
SKIA0162E
SKIA4981E
SKIA4983E
SKIA4982E
SKIA4983E
SKIA0164E

NAVIGATION SYSTEM
AV-95
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Terminal and Reference Value for Display unitINFOID:0000000003533715
Terminal No. (Wire
color)
ItemSignal
input/
outputCondition
Vo l ta g e
(Approx.)Example of
symptom
+–Igni-
tion
switchOperation
1 (B) Ground Ground – ON – 0 V –
2 (L/W) GroundPower sup-
ply (Inverter) Input ON – 9 VScreen is not
shown.
3 (L/R) GroundPower sup-
ply (Signal) Input ON – 9 VScreen is not
shown.
6 (R/W) 7RGB signal
(G: green)Input ONSelect “Display Di-
agnosis (DCU)” of
CONFIRMATION/
ADJUSTMENT
function.Screen looks
reddish.
7 – Shield ground – – – – –
8 (R) 21Horizontal
synchroniz-
ing (HP) sig-
nalOutput ON –Operating
screen for audio
and A/C is not
displayed when
showing NAVI
screen.
9 (B) 21RGB area
(YS) signalInput ONPress the “TRIP”
button.RGB screen is
not shown.
11 (B/W) 23Display com-
munication
signal
(DCU-DSP)Input ON –Though a screen
is displayed, it is
impossible to ad-
just brightness.
13 (P) Ground(Inverter)
Ground –ON – 0 V –
14 (P/L) Ground(Signal)
Ground –ON – 0 V –
17 (R/L) 7RGB signal
(R: red)Input ONSelect “Display Di-
agnosis (DCU)” of
CONFIRMATION/
ADJUSTMENT
function.Screen looks
bluish.
SKIA4981E
SKIA4983E
SKIA0162E
SKIA4364E
SKIA4980E

AV-96
< SERVICE INFORMATION >
NAVIGATION SYSTEM
Terminal and Reference Value for AV Switch
INFOID:0000000003533716
18 (B) 7RGB signal
(B: blue)Input ONSelect “Display Di-
agnosis (DCU)” of
CONFIRMATION/
ADJUSTMENT
function.Screen looks
yellowish.
19 (G) 21RGB syn-
chronizing
signalInput ONPress the “TRIP”
button.NAVI screen is
rolling.
20 (W) 21Vertical syn-
chronizing
(VP) signalOutput ON –Operating
screen for audio
and A/C is not
displayed when
showing NAVI
screen.
21 – Shield ground – – – – –
22 (L) 23Display com-
munication
signal
(DSP-DCU)Output ON –Though a screen
is displayed, it is
impossible to ad-
just brightness.
23 – Shield ground – – – – – Terminal No. (Wire
color)
ItemSignal
input/
outputCondition
Voltag e
(Approx.)Example of
symptom
+–Igni-
tion
switchOperation
SKIA4982E
SKIA0164E
SKIA4983E
SKIA4363E
Te r m i n a l N o .
(Wire color)
ItemSignal
input/
outputCondition
Vo l ta g e
(Approx.)Example of
symptom
+–Ignition
switchOperation
1 (Y) Ground Battery power Input OFF - Battery voltageSystem does not
work properly.
2 (V) Ground ACC signal Input ACC - Battery voltageSystem does not
work properly.
3 (R/L) GroundIllumination
signalInput OFFLighting switch is
ON (position 1).Battery voltageAV switch illumi-
nation does not
come on when
lighting switch is
ON (position 1). Turn lighting switch
OFF.3.0V or less

NAVIGATION SYSTEM
AV-97
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Terminal and Reference Value for BCMINFOID:0000000003533717
Refer to BCS-11, "Terminal and Reference Value for BCM".
On Board Self-Diagnosis FunctionINFOID:0000000003533718
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 indi-
vidual 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 judg-
ment 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.
4 (BR) GroundIllumination
control signalInput ONIllumination control
switch is operated
by lighting switch in
1st position.Changes between 0 and 12V.AV switch illumi-
nation cannot be
controlled.
5 (B) Ground Ground - ON - 0V -
6 (V) GroundCommunica-
tion signal (+)Input/
outputON -System does not
work properly.
7 - Shield ground - - - - -
8 (LG) GroundCommunica-
tion signal (-)Input/
outputON -System does not
work properly.
12 (R) GroundRemote con-
trol AInput ONPress MODE switch 0V
Steering wheel
audio controls
do not function. Press SEEK UP
switch0.75V
Press VOL UP
switch2V
Except for above 5V
13 (G) GroundRemote con-
trol BInput ONPress POWER
switch 0V
Steering wheel
audio controls
do not function. Press SEEK
DOWN switch0.75V
Press VOL DOWN
switch2V
Except for above 5V
14 (L) -Remote con-
trol ground-- - -Steering wheel
audio controls
do not function. Te r m i n a l N o .
(Wire color)
ItemSignal
input/
outputCondition
Vol tag e
(Approx.)Example of
symptom
+–Ignition
switchOperation
SKIA0175E
SKIA0176E

AV-98
< SERVICE INFORMATION >
NAVIGATION SYSTEM
DIAGNOSIS ITEM
NOTE:
Make the status that is set by D/N function be shown.
Self-Diagnosis Mode (DCU)INFOID:0000000003533719
OPERATION PROCEDURE
1. Start the engine.
2. Turn the audio system off.
Mode Description
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 anten-
na and operation of each unit.
CONFIRMATION/
ADJUSTMENTDisplay diagnosisIn 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 signalsIn display control unit mode, analyzes the following vehicle signals: Vehicle
speed signal, light signal
NOTE, ignition switch signal, and reverse signal.
Auto Climate Control A/C self-diagnosis of A/C system.
NavigationDisplay diagnosisIn 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 signalsIn NAVI C/U mode, analyzes the following vehicle signals: Vehicle speed
signal, light signal, ignition switch signal, and reverse signal.
History of ErrorsDiagnosis 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-
tionDisplay Lon-
gitude & Lat-
itudeDisplay the map. Use the joystick to adjust position. Longitude and latitude
will be displayed.
Speed Cali-
brationUnder ordinary conditions, the navigation system distance measuring func-
tion 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.
Angle ad-
justmentCorrects difference between actual turning angle of a vehicle and turning
angle of the car mark on the display.
Initialize Lo-
cationThis 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.

NAVIGATION SYSTEM
AV-99
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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. Perform self-diagnosis by selecting the “Self-Diagnosis”.
• Self-diagnosis subdivision screen will be shown and the oper-
ation enters the self-diagnosis mode.
• A bar graph shown below the self-diagnosis subdivision
screen indicates progress of the diagnosis.
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.
WKIA4439E
SKIA4207E
SKIA4208E
SKIA4209E

AV-100
< SERVICE INFORMATION >
NAVIGATION SYSTEM
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-86,
"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-134, "
Unable to Operate All of AV
Switches (Unable to Start Self-Diagnosis)".
• When display unit has a malfunction, you cannot start. Refer to AV-132, "
Screen Is Not Shown".
Self-Diagnosis Codes
Green : Not malfunctioning.
Yellow : Cannot be judged by self-diagnosis results.
Red : Unit is malfunctioning.
Gray : Diagnosis has not been done.
WKIA1189E
SKIA4211E
Screen switch
Diagnosis No.
Switch color DCU* DISPLAY Audio unit NavigationGPS an-
tenna
Red×1
Gray×x2
xx 3
×××4
Diagnosis
No.Possible causeReference
page
1 Display control unit malfunction Refer to AV- 1 4 5
.
2 Display communication line between display control unit and display unit Refer to AV- 1 2 1
.
3Audio unit power supply and ground circuit
Audio communication line between display control unit and audio unitRefer to AV- 11 9
.
4NAVI control unit power supply and ground circuit
AV communication line between display control unit and NAVI control unitRefer to AV- 11 8
.