Infiniti QX56 (JA60). Manual — part 69
AV-84
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
VERTICAL SYNCHRONIZING (VP) SIGNAL CIRCUIT
VERTICAL SYNCHRONIZING (VP) SIGNAL CIRCUIT
Description
INFOID:0000000005146323
In composite image (AUX image, camera image), transmit the vertical synchronizing (VP) signal and horizon-
tal synchronizing (HP) signal from display unit to AV control unit so as to synchronize the RGB images dis-
played with AV control unit such as the image quality adjusting menu, etc.
Diagnosis Procedure
INFOID:0000000005146324
Regarding Wiring Diagram information, refer to
.
1.
CHECK CONTINUITY VERTICAL SINCHRONIZING (VP) SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display unit connector M93 and AV control unit con-
nector M43.
3. Check continuity between display unit harness connector M93
(A) terminal 20 and AV control unit harness connector M43 (B)
terminal 29.
4. Check continuity between display unit harness connector M93
(A) terminal 20 and ground.
Are continuity results as specified?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK VERTICAL SINCHRONIZING (VP) SIGNAL
1. Connect display unit connector M93 and AV control unit connec-
tor M43.
2. Turn ignition switch ON.
3. Check signal between display unit harness connector M93 ter-
minal 20 and ground.
Are voltage readings as specified?
YES
>> Replace AV control unit. Refer to
AV-169, "Removal and Installation"
.
NO
>> Replace display unit. Refer to
AV-171, "Removal and Installation"
A
B
Continuity
Connector
Terminal
Connector
Terminal
M93
20
M43
29
Yes
A
—
Continuity
Connector
Terminal
M93
20
Ground
No
ALNIA0415GB
(+)
(-)
Condition
Reference signal
Connector
Terminal
M93
20
Ground
Receive
audio sig-
nal
ALNIA0393GB
SKIB3598E
AV
FRONT DOOR SPEAKER
AV-85
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
FRONT DOOR SPEAKER
Description
INFOID:0000000005146325
The AV control unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the
audio signals before sending them to the front door speakers using the audio signal circuits.
Diagnosis Procedure
INFOID:0000000005146326
Regarding Wiring Diagram information, refer to
.
1.
HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M112 and suspect
speaker connector.
2. Check continuity between BOSE speaker amp. harness connec-
tor M112 (A) and suspect speaker harness connector (B).
3. Check continuity between BOSE speaker amp. harness connec-
tor M112 (A) and ground.
Are continuity test results as specified?
YES
>> GO TO 2.
NO
>> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
2.
FRONT SPEAKER SIGNAL CHECK
A B
Continuity
Connector
Terminal
Connector
Terminal
M112
4
D12
1
Yes
5
2
8
D112
1
13
2
A
—
Continuity
Connector
Terminal
M112
4
Ground
No
5
8
13
ALNIA0342GB
AV-86
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
FRONT DOOR SPEAKER
1. Connect BOSE speaker amp. connector M112 and suspect
speaker connector.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between BOSE speaker amp. harness connec-
tor M112 terminals with CONSULT-III or oscilloscope.
Is audio signal voltage as specified?
YES
>> Replace suspect speaker. Refer to
.
NO
>> GO TO 3.
3.
HARNESS CHECK
1. Disconnect AV control unit connector M42 and BOSE speaker
amp. connector M113.
2. Check continuity between AV control unit harness connector
M42 (A) and BOSE speaker amp. harness connector M113 (B).
3. Check continuity between AV control unit harness connector
M42 (A) and ground.
Are continuity test results as specified?
YES
>> GO TO 4.
NO
>> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
4.
FRONT SPEAKER SIGNAL CHECK
Connec-
tor
Terminal
Condition
Reference
signal
(+)
(-)
M112
4
5
Receive
audio sig-
nal
8
13
ALNIA0343GB
SKIA0177E
A
B
Continuity
Connector
Terminal
Connector
Terminal
M42
2
M113
18
Yes
3
32
11
19
12
20
A
—
Continuity
Connector
Terminal
M42
2
Ground
No
3
11
12
ALNIA0416GB
AV
FRONT DOOR SPEAKER
AV-87
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
1. Connect AV control unit connector and BOSE speaker amp.
connector.
2. Turn ignition switch ACC.
3. Push “POWER” switch.
4. Check the signal between AV control unit harness connector
M42 terminals with CONSULT-III or oscilloscope.
Are the audio signal voltage readings as specified?
YES
>> Replace BOSE speaker amp. Refer to
.
NO
>> Replace AV control unit. Refer to
Connector
Terminals
Condition
Reference
signal
(+)
(-)
M42
2
3
Receive
audio sig-
nal
11
12
ALNIA0417GB
SKIA0177E
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