Infiniti QX56 (JA60). Manual — part 73
AV-100
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
BACK DOOR SPEAKER
1. Connect BOSE speaker amp. connectors and suspect speaker
connector.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between BOSE speaker amp. harness connec-
tors M113 terminals with CONSULT-III or oscilloscope.
Are audio signal voltage readings 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 the continuity test results as specified?
YES
>> GO TO 4.
NO
>> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
4.
REAR DOOR SPEAKER SIGNAL CHECK
Connector
Terminals
Condition
Reference
signal
(+)
(-)
M112
6
7
Receive
audio sig-
nal
M113
37
27
ALNIA0664GB
SKIA0177E
A
B
Continuity
Connector
Terminal
Connector
Terminal
M42
4
M113
21
Yes
5
22
13
23
14
33
A
—
Continuity
Connector
Terminal
M42
4
Ground
No
5
13
14
ALNIA0418GB
AV
BACK DOOR SPEAKER
AV-101
< 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 M42 and BOSE speaker
amp. connector M113.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between AV control unit harness connector
M42 terminals with CONSULT-III or oscilloscope.
Is the audio signal voltage reading as specified?
YES
>> Replace BOSE speaker amp. Refer to
.
NO
>> Replace AV control unit. Refer to
Connector
Terminals
Condition
Reference
signal
(+)
(-)
M42
4
5
Receive
audio sig-
nal
13
14
ALNIA0419GB
SKIA0177E
AV-102
< COMPONENT DIAGNOSIS >
[AUDIO SYSTEM]
SUBWOOFER
SUBWOOFER
Description
INFOID:0000000005146337
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 subwoofer using the audio signal circuits.
Diagnosis Procedure
INFOID:0000000005146338
Regarding Wiring Diagram information, refer to
.
1.
VERIFY SUBWOOFER POWER AND GROUND SUPPLY
Check power and ground supply to the subwoofer. Refer to
AV-71, "WOOFER : Diagnosis Procedure"
Did the power and ground supply check OK?
YES
>> GO TO 2.
NO
>> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
2.
HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M112 and sub-
woofer connector.
2. Check continuity between BOSE speaker amp. harness connec-
tor M112 (A) and M113 (B) and subwoofer harness connector
B72 (C).
3. Check continuity between BOSE speaker amp. harness connec-
tor M112 (A) and M113 (B) and ground.
Are the continuity test results as specified?
YES
>> GO TO 3.
NO
>> • Check connector housings for disconnected or loose
terminals.
• Repair harness or connector.
3.
SUBWOOFER AMP ON SIGNAL CHECK
Connector
Terminal
Connector
Terminal
Continuity
A: M112
9
C: B72
2
Yes
14
1
B: M113
25
4
Connector
Terminal
-
Continuity
A: M112
9
Ground
No
14
B: M113
25
ALNIA0365GB
AV
SUBWOOFER
AV-103
< 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.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check voltage between subwoofer connector B72 terminal 4
and ground.
Are the voltage test results as specified?
YES
>> GO TO 4.
NO
>> Replace BOSE speaker amp. Refer to
AV-182, "Removal and Installation"
.
4.
SUBWOOFER AUDIO SIGNAL CHECK
1. Connect BOSE speaker amp. connector M112 and subwoofer connector B72.
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 the audio signal voltage as specified?
YES
>> Replace subwoofer. Refer to
AV-177, "Removal and Installation"
NO
>> GO TO 5.
5.
HARNESS CHECK
(+)
(-)
ACC
Connector
Terminal
B72
4
Ground
Battery voltage
ALNIA0364GB
Connector
Terminals
Condition
Reference
signal
(+)
(-)
M112
9
14
Receive au-
dio signal
ALNIA0366GB
SKIA0177E
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