Infiniti QX56 (JA60). Manual — part 75
AV-108
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
MICROPHONE SIGNAL CIRCUIT
MICROPHONE SIGNAL CIRCUIT
Description
INFOID:0000000005146343
Voice signals are transmitted from the microphone to the AV control unit using the microphone signal circuits.
Diagnosis Procedure
INFOID:0000000005146344
Regarding Wiring Diagram information, refer to
.
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
3.
CHECK MICROPHONE SIGNAL
A
B
Continuity
Connector
Terminal
Connector
Terminal
M45
72
R109
1
Yes
71
2
70
4
A
—
Continuity
Connector
Terminal
M45
70
Ground
No
71
72
AWLIA1603ZZ
4 - Ground
: Approx. 5V
WKIA5796E
AV
MICROPHONE SIGNAL CIRCUIT
AV-109
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
Check signal between AV control unit harness connector M45 termi-
nals 71 and 72.
Are voltage readings as specified?
YES
>> Replace AV control unit. Refer to
AV-169, "Removal and Installation"
.
NO
>> Replace microphone. Refer to
AV-187, "Removal and Installation"
.
Connector
(+)
(-)
Reference signal
Terminal
Terminal
M45
71
72
While speaking into MIC
ALNIA0423GB
PKIB5037J
AV-110
< ECU DIAGNOSIS >
[AUDIO SYSTEM]
AV CONTROL UNIT
ECU DIAGNOSIS
AV CONTROL UNIT
Reference Value
INFOID:0000000005146345
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
Terminal
(Wire color)
Description
Condition
Reference value
(Approx.)
+
–
Signal name
Input/
Output
1
(GR/L)
Ground Amp. ON signal
Output
Ignition
switch
ON
—
Battery voltage
2
(LG)
3
(V)
Pre-amp. audio signal front
LH
Output
Ignition
switch
ON
Audio output
SKIB3609E
AV
AV CONTROL UNIT
AV-111
< ECU DIAGNOSIS >
[AUDIO SYSTEM]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
4
(L)
5
(B/W)
Pre-amp. audio signal rear
LH
Output
Ignition
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
Input
Ignition
switch
ACC
−
Battery voltage
9
(R/L)
Ground Illumination signal
Input
OFF
Lighting switch is OFF
0V
Lighting switch is ON
Battery voltage
10
—
Shield
—
—
—
—
11
(BR)
12
(B/R)
Pre-amp. audio signal front
RH
Output
Ignition
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
—
0V
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
—
0V
Terminal
(Wire color)
Description
Condition
Reference value
(Approx.)
+
–
Signal name
Input/
Output
SKIB3609E
SKIB3609E
SKIB3609E
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