Nissan Pathfinder (2009 year). Manual — part 25
AV-12
< FUNCTION DIAGNOSIS >
[BASE AUDIO]
AUDIO SYSTEM
FUNCTION DIAGNOSIS
AUDIO SYSTEM
System Diagram
INFOID:0000000003938922
System Description
INFOID:0000000003938923
AUDIO SYSTEM
The audio system consists of the following components
• Audio unit
• Window antenna (audio)
• Front door speakers
• Front tweeters
• Rear door speakers
When the audio system is on, radio signals are received by the window antenna. The audio unit then sends
audio signals to the front door speakers, front tweeters and rear speakers.
Refer to Owner's Manual for audio system operating instructions.
Component Parts Location
INFOID:0000000003938924
AWNIA0625GB
ALNIA0554GB
2009 Pathfinder
A V
AUDIO SYSTEM
AV-13
< FUNCTION DIAGNOSIS >
[BASE AUDIO]
C
D
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F
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B
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Component Description
INFOID:0000000003938925
1.
Front tweeter LH M109
2.
Audio unit M38
3.
Front tweeter RH M111
4.
Front door speaker
LH D12
RH D112
5.
Rear door speaker
LH D209
RH D309
Part name
Description
Audio unit
Controls audio system functions
Front door speakers
• Outputs audio signal from audio unit
• Outputs high, mid and low range sounds
Front tweeters
• Outputs audio signal from audio unit
• Outputs high range sounds
Rear door speakers
• Outputs audio signal from audio unit
• Outputs high, mid and low range sounds
2009 Pathfinder
AV-14
< COMPONENT DIAGNOSIS >
[BASE AUDIO]
POWER SUPPLY AND GROUND CIRCUIT
COMPONENT DIAGNOSIS
POWER SUPPLY AND GROUND CIRCUIT
AUDIO UNIT
AUDIO UNIT : Diagnosis Procedure
INFOID:0000000003938926
1.
CHECK FUSES
Check that the following fuses are not blown.
Are the fuses OK?
YES
>> GO TO 2
NO
>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2.
POWER SUPPLY CIRCUIT CHECK
1.
Disconnect audio unit connector M38.
2.
Check voltage between the audio unit connector M38 and
ground.
Are the voltage results as specified?
YES
>> GO TO 3
NO
>> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
3.
GROUND CIRCUIT CHECK
Inspect audio unit case ground.
Does case ground pass inspection?
YES
>> Inspection End.
NO
>> Repair audio unit case ground.
Unit
Terminals
Signal name
Fuse No.
Audio unit
19
Battery power
29
7
Ignition switch ACC or ON
4
(+)
(-)
OFF
ACC
ON
Connector
Terminal
M38
19
Ground
Battery
voltage
Battery
voltage
Battery
voltage
7
Ground
0V
Battery
voltage
Battery
voltage
WKIA5769E
2009 Pathfinder
AV
FRONT DOOR SPEAKER
AV-15
< COMPONENT DIAGNOSIS >
[BASE AUDIO]
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FRONT DOOR SPEAKER
Description
INFOID:0000000003938927
The audio unit sends audio signals to the front door speakers using the front door speaker circuits.
Diagnosis Procedure
INFOID:0000000003938928
1.
HARNESS CHECK
1.
Disconnect audio unit connector M38 (A) and suspect speaker
connector (B).
2.
Check continuity between audio unit harness connector M38 (A)
terminal and suspect speaker harness connector (B) terminal.
3.
Check continuity between audio unit harness connector M38 (A)
terminal and ground.
Are continuity 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
M38
2
D12
1
Yes
3
2
11
D112
1
12
2
A
—
Continuity
Connector
Terminal
M38
2
Ground
No
3
11
12
AWNIA0031ZZ
2009 Pathfinder
AV-16
< COMPONENT DIAGNOSIS >
[BASE AUDIO]
FRONT DOOR SPEAKER
1.
Connect audio unit connector and front speaker connector.
2.
Turn ignition switch to ACC.
3.
Push “POWER” switch.
4.
Check the signal between audio unit harness connector termi-
nals with CONSULT-III or oscilloscope.
Is the audio signal voltage as specified?
YES
>> Replace speaker. Refer to
.
NO
>> Replace audio unit. Refer to
Connector
Terminal
Condition
Reference
signal
(+)
(-)
M38
2
3
Receive audio
signal
11
12
AWNIA0032ZZ
SKIA0177E
2009 Pathfinder
AV
FRONT TWEETER
AV-17
< COMPONENT DIAGNOSIS >
[BASE AUDIO]
C
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FRONT TWEETER
Description
INFOID:0000000003938929
The audio unit sends audio signals to the front tweeters using the front tweeter circuits.
Diagnosis Procedure
INFOID:0000000003938930
1.
HARNESS CHECK
1.
Disconnect audio unit connector M38 (A) and suspect front
tweeter connector (B).
2.
Check continuity between audio unit harness connector M38 (A)
and suspect front tweeter harness connector (B).
3.
Check continuity between audio unit harness connector M38 (A)
and ground.
Are the continuity results as specified?
YES
>> GO TO 2
NO
>> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
2.
TWEETER SIGNAL CHECK
A
B
Continuity
Connector
Terminal
Connector
Terminal
M38
2
M109
1
Yes
3
2
11
M111
1
12
2
A
—
Continuity
Connector
Terminal
M38
2
Ground
No
3
11
12
AWNIA0031ZZ
2009 Pathfinder
AV-18
< COMPONENT DIAGNOSIS >
[BASE AUDIO]
FRONT TWEETER
1.
Connect audio unit connector and front tweeter connector.
2.
Turn ignition switch to ACC.
3.
Push “POWER” switch.
4.
Check the signal between audio unit harness connector termi-
nals with CONSULT-III or oscilloscope.
Is the audio signal voltage as specified?
YES
>> Replace tweeter. Refer to
.
NO
>> Replace audio unit. Refer to
Connector
Terminals
Condition
Reference signal
(+)
(-)
M38
2
3
Receive audio
signal
11
12
AWNIA0032ZZ
SKIA0177E
2009 Pathfinder
AV
REAR DOOR SPEAKER
AV-19
< COMPONENT DIAGNOSIS >
[BASE AUDIO]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
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REAR DOOR SPEAKER
Description
INFOID:0000000003938931
The audio unit sends audio signals to the rear door speakers using the rear door speaker circuits.
Diagnosis Procedure
INFOID:0000000003938932
1.
HARNESS CHECK
1.
Disconnect audio unit connector M38 (A) and suspect speaker
connector.
2.
Check continuity between audio unit harness connector M38 (A)
and suspect speaker harness connector (B).
3.
Check continuity between audio unit harness connector M38 (A)
and ground.
Are the continuity results as specified?
YES
>> GO TO 2
NO
>> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
2.
REAR SPEAKER SIGNAL CHECK
A B
Continuity
Connector
Terminal
Connector
Terminal
M38
4
D207
1
Yes
5
2
13
D307
1
14
2
A
—
Continuity
Connector
Terminal
M38
4
Ground
No
5
13
14
AWNIA0033ZZ
2009 Pathfinder
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