Infiniti QX56 (JA60). Manual — part 70
AV-88
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
FRONT TWEETER
FRONT TWEETER
Description
INFOID:0000000005146327
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 tweeters using the audio signal circuits.
Diagnosis Procedure
INFOID:0000000005146328
Regarding Wiring Diagram information, refer to
.
1.
HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M112 and suspect
tweeter connector.
2. Check continuity between BOSE speaker amp. harness connec-
tor M112 (A) and suspect tweeter 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 TWEETER 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
FRONT TWEETER
AV-89
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
1. Connect BOSE speaker amp. connector M112 and suspect
tweeter 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 tweeter. 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-90
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
FRONT TWEETER
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
AV
CENTER SPEAKER
AV-91
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
CENTER SPEAKER
Description
INFOID:0000000005146329
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 center speaker using the audio signal circuits.
Diagnosis Procedure
INFOID:0000000005146330
Regarding Wiring Diagram information, refer to
.
1.
HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M113 and center
speaker connector M110.
2. Check continuity between BOSE speaker amp. harness connec-
tor M113 (A) and center speaker harness connector M110 (B).
3. Check continuity between BOSE speaker amp. harness connec-
tor M113 (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.
CENTER SPEAKER SIGNAL CHECK
1. Connect BOSE speaker amp. connector M113 and center
speaker connector M110.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between BOSE speaker amp. harness connec-
tor M113 terminals with CONSULT-III or oscilloscope.
Is the audio signal voltage reading as specified?
A B
Continuity
Connector
Terminal
Connector
Terminal
M113
15
M110
1
Yes
28
2
A
—
Continuity
Connector
Terminal
M113
15
Ground
No
28
ALNIA0349GB
Connector
Terminals
Condition
Reference
signal
(+)
(-)
M113
15
28
Receive
audio sig-
nal
ALNIA0842GB
SKIA0177E
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