2009 INFINITI QX56 ignition

AV
MICROPHONE SIGNAL CIRCUITAV-107
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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MICROPHONE SIGNAL CIRCUIT
DescriptionINFOID:0000000003776889
Voice signals are transmitted from the microphone to the AV control unit using the microphone signal circuits.
Diagnosis ProcedureINFOID:0000000003776890
1.CHECK HARNESS BETWEEN AV CONTROL UNIT AND MICROPHONE
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector and microphone connec- tor.
3. Check continuity between AV control unit harness connector M45 (A) and microphone harness connector R109 (B).
4. Check continuity between AV control unit harness connector M45 (A) and ground.
Are the continuity test results as specified?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK MICROPHONE POWER SUPPLY
1. Connect AV control unit connector and microphone connector.
2. Turn ignition switch ON.
3. Check voltage between microphone harness connector R109 terminal 4 and ground.
Is voltage reading approx. 5 volts?
YES >> GO TO 3.
NO >> Replace AV control unit. Refer to AV-168, "
Removal and
Installation".
3.CHECK MICROPHONE SIGNAL
AB
Continuity
Connector Terminal Connector Terminal
M45 72
R109 1
Ye s
71 2
70 4
A —Continuity
Connector Terminal
M45 70
GroundNo
71
72
AWLIA1603ZZ
4 - Ground : Approx. 5V
WKIA5796E
Revision: December 20092009 QX56

AV
AV CONTROL UNITAV-109
< ECU DIAGNOSIS > [AUDIO SYSTEM]
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ECU DIAGNOSIS
AV CONTROL UNIT
Reference ValueINFOID:0000000003776891
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: December 20092009 QX56

AV-110
< 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
(BR) 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: December 20092009 QX56

AV
AV CONTROL UNITAV-111
< 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 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: December 20092009 QX56

AV-112
< 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: December 20092009 QX56

AV
AV CONTROL UNITAV-113
< 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
(W) Ground MIC power
OutputIgnition
switch ON —5
V
72
(B) 71 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: December 20092009 QX56

AV-114
< 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
(G) 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
(L/W) —AV communication signal 2
(H) Input/
Output ——
—
93
(B/P) —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 ——
T

erminal
(Wire color) Description
ConditionReference value
(Approx.)
+ – Signal nameInput/
Output
SKIA6649J
Revision: December 20092009 QX56

AV
DISPLAY UNITAV-145
< ECU DIAGNOSIS > [AUDIO SYSTEM]
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DISPLAY UNIT
Reference ValueINFOID:0000000003776894
TERMINAL LAYOUT
PHYSICAL VALUES
ALNIA0666GB
Te r m i n a l
(Wire color) Description
ConditionReference value
(Approx.)
+ – Signal nameInput/
Output
1
(B) Ground Ground
—Ignition
switch ON —0
V
2
(Y) Ground Battery power supply Input Ignition
switch
OFF —1
2V
3
(V) Ground ACC power supply
InputIgnition
switch ACC —1
2V
4—Shield —— — —
5
(L) Ground DVD player image ground — Ignition
switch ON —0
V
6
(B) Ground RGB signal (G: green) Input Ignition
switch ON Start confirmation/adjust-
ment mode, and then dis-
play color bar by
selecting“Color Spectrum
Bar” on DISPLAY DIAGNO-
SIS screen.
7—Shield —— — —
8
(W/L) Ground
Horizontal synchronizing
(HP) signal OutputIgnition
switch
ON —
SKIB2236J
SKIB3601E
Revision: December 20092009 QX56