2008 INFINITI QX56 ECU

AV
AV-3
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Description ..........................................................
....
76
Diagnosis Procedure ...............................................76
RGB AREA (YS) SIGNAL CIRCUIT ..................77
Description .......................................................... ....77
Diagnosis Procedure ...............................................77
HORIZONTAL SYNCHRONIZING (HP) SIG-
NAL CIRCUIT ................................................. ....
78
Description .......................................................... ....78
Diagnosis Procedure ...............................................78
VERTICAL SYNCHRONIZING (VP) SIGNAL
CIRCUIT ......................................................... ....
79
Description .......................................................... ....79
Diagnosis Procedure ...............................................79
FRONT DOOR SPEAKER .................................80
Description .......................................................... ....80
Diagnosis Procedure ...............................................80
FRONT TWEETER .............................................83
Description .......................................................... ....83
Diagnosis Procedure ...............................................83
CENTER SPEAKER ...........................................86
Description .......................................................... ....86
Diagnosis Procedure ...............................................86
REAR DOOR SPEAKER ....................................88
Description .......................................................... ....88
Diagnosis Procedure ...............................................88
REAR DOOR TWEETER ...................................91
Description .......................................................... ....91
Diagnosis Procedure ...............................................91
BACK DOOR SPEAKER ...................................94
Description .......................................................... ....94
Diagnosis Procedure ...............................................94
SUBWOOFER ....................................................97
Description .......................................................... ....97
Diagnosis Procedure ...............................................97
AMP ON SIGNAL CIRCUIT .............................100
Description .......................................................... ..100
Diagnosis Procedure .............................................100
STEERING SWITCH ........................................101
Description .......................................................... ..101
Diagnosis Procedure .............................................101
MICROPHONE SIGNAL CIRCUIT ...................103
Description .......................................................... ..103
Diagnosis Procedure .............................................103
ECU DIAGNOSIS .......................................105
AV CONTROL UNIT ....................................... ..105
Reference Value ................................................. ..105
Wiring Diagram .....................................................111
DTC Index ........................................................... ..139
DISPLAY UNIT ................................................141
Reference Value ....................................................141
BOSE SPEAKER AMP ...................................144
Reference Value ....................................................144
REAR VIEW CAMERA CONTROL UNIT .......147
Reference Value ....................................................147
DVD PLAYER ..................................................149
Reference Value ....................................................149
SYMPTOM DIAGNOSIS ............................151
MULTI AV SYSTEM ........................................151
Symptom Table ................................................... ..151
NORMAL OPERATING CONDITION .............153
Description .............................................................153
PRECAUTION ............................................161
PRECAUTIONS ...............................................161
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
161
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
161
PREPARATION .........................................163
PREPARATION ...............................................163
Commercial Service Tools ................................... ..163
ON-VEHICLE REPAIR ...............................164
AV CONTROL UNIT ........................................164
Removal and Installation ..................................... ..164
DISPLAY UNIT ................................................166
Removal and Installation .......................................166
FRONT TWEETER ..........................................167
Removal and Installation .......................................167
CENTER SPEAKER ........................................168
Removal and Installation .......................................168
FRONT DOOR SPEAKER ..............................169
Removal and Installation .......................................169
REAR DOOR SPEAKER ................................170
Removal and Installation .......................................170
BACK DOOR SPEAKER ................................171
Removal and Installation .......................................171
SUBWOOFER .................................................172
Removal and Installation .......................................172
DVD PLAYER ..................................................173
Removal and Installation .......................................173
Revision: March 2010 2008 QX56

AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)AV-33
< FUNCTION DIAGNOSIS > [AUDIO SYSTEM]
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Deletes any unit connection records and error records from the AV
control unit memory. (Clear the records of the unit that has been
removed)
Inititialize Settings
Initializes the AV control unit memory.
AV CONTROL UNIT : CONSULT-III FunctionINFOID:0000000001696039
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
Self-diagnosis results
• In CONSULT-III self-diagnosis, self-diagnosis results and error history are displayed collectively.
• The current malfunction indicates “CRNT”. The past malfunction indicates “PAST”.
• The timing is displayed as “0” if any of the error codes [U1000], [U1010], [U1300] and [U1310] is detected.
The counter increases by 1 if the condition is normal at the next ignition switch ON cycle.
Self-diagnosis results display item
ALNIA0239GB
ALNIA0240GB
MULTI AV diagnosis mode Description
SELF-DIAG RESULTS Displays AV control unit self-diagnosis results.
DATA MONITOR Displays AV control unit input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
AV COMM MONITOR Allows the technician to monitor the status of the Multi AV system communication signals.
ECU PART NUMBER The part number of AV control unit can be checked.
Error item DescriptionPossible malfunction factor/Action to take
CAN COMM CIRCUIT[U1000] CAN communication malfunction is detect-
edPerform diagnosis with CONSULT-III, and
then repair the malfunctioning parts accord-
ing to the diagnosis results.
Refer to AV- 3 3 , "
AV CONTROL UNIT :
CONSULT-III Function".
Revision: March 2010
2008 QX56

AV
AV CONTROL UNITAV-105
< ECU DIAGNOSIS > [AUDIO SYSTEM]
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ECU DIAGNOSIS
AV CONTROL UNIT
Reference ValueINFOID:0000000001696141
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III data monitor item
TERMINAL LAYOUT
PHYSICAL VALUES
Display Item Dis-
play Vehicle status
Remarks
VHCL SPD SIG ON Vehicle speed >0 km/h (0 MPH)
Changes in indication may be delayed. This is
normal.
OFF Vehicle speed =0 km/h (0 MPH)
PKB SIG ON Parking brake is applied.
Changes in indication may be delayed. This is
normal.
OFF Parking brake is released.
ILLUM SIG ON
Block the light beam from the auto
light optical sensor when the light
SW is ON.
—
OFF Expose the auto light optical sensor
to light when the light SW is OFF or
ON.
IGN SIG ON Ignition switch ON
—
OFF Ignition switch in ACC position
REV SIG ON Selector lever in R position
Changes in indication may be delayed. This is
normal.
OFF Selector lever in any position other
than R
ALNIA0670GB
Te r m i n a l
(Wire color) Description
ConditionReference value
(Approx.)
+ – Signal nameInput/
Output
1
(GR/L) Ground Amp. ON signal
OutputIgnition
switch ON —
Battery voltage
2
(LG) 3
(V) Pre-amp. audio signal front
LH
OutputIgnition
switch ON Audio output
SKIB3609E
Revision: March 2010
2008 QX56

AV-106
< ECU DIAGNOSIS >[AUDIO SYSTEM]
AV CONTROL UNIT
4
(L) 5
(B/W) Pre-amp. audio signal rear
LH
OutputIgnition
switch ON Audio output
6
(Y) 15 Steering switch signal A Input Ignition
switch
ON Pressing switch
0V
Pressing switch 0.75
Pressing VOL up switch 2V
Except for above 5V
7
(V) Ground ACC power supply
InputIgnition
switch ACC −
Battery voltage
9
(R/L) Ground Illumination signal
Input OFFLighting switch is OFF
0V
Lighting switch is ON Battery voltage
10 — Shield — —— —
11
(BR) 12
(B/R) Pre-amp. audio signal front
RH
OutputIgnition
switch ON Audio output
13
(W) 14
(B) Audio signal rear RH Output Ignition
switch
ON Audio output
15 Ground Steering switch signal
ground —Ignition
switch
ON —0
V
16
(G) 15 Steering switch signal B Input Ignition
switch ON Pressing switch
0V
Pressing switch 0.75V
Pressing VOL down switch 2V
Except for above 5V
19
(Y) Ground Battery power supply Input Ignition
switch OFF —
Battery voltage
20
(B) Ground Ground
—Ignition
switch
ON —0
V
Terminal
(Wire color) Description
ConditionReference value
(Approx.)
+ – Signal nameInput/
Output
SKIB3609E
SKIB3609E
SKIB3609E
Revision: March 2010 2008 QX56

AV
AV CONTROL UNITAV-107
< ECU DIAGNOSIS > [AUDIO SYSTEM]
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(W) 24 RGB signal (R: red) Output Ignition
switch ON Start confirmation/adjust-
ment mode, and then dis-
play color bar by selecting
“Color Spectrum Bar” on
DISPLAY DIAGNOSIS
screen.
22
(B) 24 RGB signal (G: green) Output Ignition
switch ON Start confirmation/adjust-
ment mode, and then dis-
play color bar by selecting
“Color Spectrum Bar” on
DISPLAY DIAGNOSIS
screen.
23
(R) 24 RGB signal (B: blue) Output Ignition
switch ON Start confirmation/adjust-
ment mode, and then dis-
play color bar by selecting
“Color Spectrum Bar” on
DISPLAY DIAGNOSIS
screen.
24 Ground RGB signal ground —Ignition
switch OFF —0
V
25
(W) 26 RGB synchronizing signal Output Ignition
switch ON —
26
(G) Ground RGB synchronizing signal
ground
—Ignition
switch ON —0
V
27
(O) Ground RGB area (YS) signal Output Ignition
switch ON At RGB image displayed
5V
At rear view camera image
displayed
Te r m i n a l
(Wire color) Description
ConditionReference value
(Approx.)
+ – Signal nameInput/
Output
SKIB2238J
SKIB2236J
SKIB2237J
SKIB3603E
PKIB4948J
Revision: March 2010 2008 QX56

AV-108
< ECU DIAGNOSIS >[AUDIO SYSTEM]
AV CONTROL UNIT
28
(W/L) Ground Horizontal synchronizing
(HP) signal InputIgnition
switch ON —
29
(O/L) Ground Vertical synchronizing (VP)
signal
InputIgnition
switch On —
30
(V) Ground Communication signal
(CONT
→DISP) OutputIgnition
switch ON When adjusting display-
brightness
31
(LG) Ground
Communication signal
(DISP→CONT) InputIgnition
switch
ON When adjusting display-
brightness
32 — Shield — —— —
39
(W) 55
(B) DVD audio signal LH Input Ignition
switch ON When DVD player is oper-
ating
40
(R) 56
(G) DVD audio signal RH Input Ignition
switch
ON When DVD player is oper-
ating
45
(SB) Ground CD/DVD eject signal Input — Pressing the eject switch
0V
Except for above 3.3V
46 — Shield — —— —
Terminal
(Wire color) Description
ConditionReference value
(Approx.)
+ – Signal nameInput/
Output
SKIB3601E
SKIB3598E
PKIB5039J
PKIB5039J
SKIB3609E
SKIB3609E
Revision: March 2010 2008 QX56

AV
AV CONTROL UNITAV-109
< ECU DIAGNOSIS > [AUDIO SYSTEM]
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(W) 48
(R) AUX jack audio signal LH Input Ignition
switch ON When AUX mode is select-
ed
58
(O/L) 42
(W) Headphone LH audio sig-
nal
OutputIgnition
switch ON When DVD player is oper-
ating
59
(W/L) 43
(O) Headphone RH audio sig-
nal
OutputIgnition
switch ON When DVD player is oper-
ating
60 — Shield — —— —
62
(B) Ground A/C and AV switch assem-
bly ground —Ignition
switch ON —0
V
63
(B) 48
(R) AUX jack audio signal RH Input Ignition
switch ON When AUX mode is select-
ed
66
(Y) Ground Battery power supply Input Ignition
switch OFF —
Battery voltage
68
(Y) Ground Battery power supply Input Ignition
switch OFF —
Battery voltage
69
(V) Ground ACC power supply
InputIgnition
switch
ACC —
Battery voltage
70
(R/W) Ground MIC power
OutputIgnition
switch ON —5
V
72
(B) 71
(R/L) MIC signal
InputIgnition
switch
ON ——
Te r m i n a l
(Wire color) Description
ConditionReference value
(Approx.)
+ – Signal nameInput/
Output
SKIB3609E
SKIB3609E
SKIB3609E
SKIB3609E
Revision: March 2010 2008 QX56

AV-110
< ECU DIAGNOSIS >[AUDIO SYSTEM]
AV CONTROL UNIT
79
(G/R) Ground IGN ON or START power
supply InputIgnition
switch ON or
START —
Battery voltage
80
(GR/R) Ground Parking brake signal Input Ignition
switch ON Parking brake ON
0V
Parking brake OFF Battery voltage
81
(G/W) Ground Reverse signal
InputIgnition
switch ON R position
Battery voltage
Other than R position 0V
82
(W/R) Ground Vehicle speed signal (8-
pulse) InputIgnition
switch ON When vehicle speed is ap-
prox. 40 km/h (25MPH)
84
(BR) —
Rear view camera control
signal Input —
— —
92
(W/L) —AV communication signal 2
(H) Input/
Output ——
—
93
(P/B) —AV communication signal 2
(L) Input/
Output ——
—
94
(W/L) —
AV communication signal 1
(H) Input/
Output ——
—
95
(P/B) —
AV communication signal 1
(L) Input/
Output ——
—
96
(L) —CAN–H Input/
Output ——
—
97
(P) —CAN–L Input/
Output ——
—
121 Ground Antenna amp. ON signal Output Ignition
switch ACC —
Battery voltage
122 — Amplified window antenna
signal
Input —
— —
123 — GPS antenna signal — —— —
124 — Shield — —— —
125 — Satellite antenna signal Input Ignition
switch AC C ——
Te
rmi

nal
(Wire color) Description
ConditionReference value
(Approx.)
+ – Signal nameInput/
Output
SKIA6649J
Revision: March 2010 2008 QX56