Infiniti G35 (V35). Manual — part 128
AUDIO
AV-27
C
D
E
F
G
H
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M
A
B
AV
Trouble Diagnosis
NKS002J9
●
The majority of the audio malfunctions are the result of outside causes (bad CD/cassette, electromagnetic
interference, etc.). Check the symptoms below to diagnose the malfunction.
●
The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunction-
ing. Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and
operation of each piece of electrical equipment, and then determine the cause.
NOTE:
Noise resulting from variations in field strength, such as fading noise and multi-path noise, or external noise
from trains and other sources. It is not a malfunction.
●
Fading noise: This noise occurs because of variations in the field strength in a narrow range due to moun-
tains or buildings blocking the signal.
●
Multi-path noise: This noise results from a time difference between the broadcast waves directly from the
station arriving at the antenna and the waves reflected by mountains or buildings.
Symptom
Possible malfunction location
Audio system does not work properly.
●
Audio unit power supply circuit
●
Audio unit
No sound can be heard from all speakers.
Base system
●
Audio unit
●
TEL ON signal circuit
BOSE system
●
BOSE speaker amp. power supply and ground circuit
●
BOSE speaker amp. ON signal circuit
●
Audio unit
●
BOSE speaker amp.
●
TEL ON signal circuit
No sound can be heard from one or several speakers.
Base system
●
Audio signal circuit between audio unit and speaker
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Speaker
●
Tweeter
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Audio unit
BOSE system
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Audio signal circuit between audio unit and BOSE speaker amp.
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Audio signal circuit between BOSE speaker amp. and speaker
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Speaker
●
Tweeter
●
Audio unit
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BOSE speaker amp.
No sound can be heard from woofer.
●
Audio signal circuit between BOSE speaker amp. and woofer
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Woofer
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BOSE speaker amp.
No sound can be heard from radio or noise is caught.
●
Antenna amp. ON signal circuit
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Antenna feeder
●
Antenna
●
Antenna amp.
●
Audio unit
AV-28
AUDIO
Power Supply Circuit Inspection
NKS002FA
1.
CHECK FUSE
Check the following fuses of the BOSE speaker amp. and audio unit.
OK or NG
OK
>> GO TO 2.
NG
>> If fuse is blown, be sure to eliminate the cause of malfunction before installing new fuse. Refer to
PG-3, "POWER SUPPLY ROUTING CIRCUIT"
2.
CHECK POWER SUPPLY CIRCUIT
1.
Check voltage between the audio unit harness connector and
ground.
2.
Check voltage between BOSE speaker amp. harness connector
and ground.
OK or NG
OK
>>
●
INSPECTION END (Base system)
●
GO TO 3. (BOSE system)
NG
>> Repair harness or connector.
Unit
Connector
Terminal
Signal name
Fuse No.
Audio unit
M40
6
Battery power
37
10
Ignition switch
ACC or ON
6
BOSE speaker
amp.
B123
1
Battery power
37
Unit
Terminal No.
OFF
ACC
(+)
(–)
Connec-
tor
Terminal
Audio unit
M40
6
Ground
Battery
voltage
Battery
voltage
10
Ground
0 V
Battery
voltage
PKIA3814E
Unit
Terminal No.
OFF
ACC
(+)
(–)
Connec-
tor
Terminal
BOSE
speaker amp.
B123
1
Ground
Battery
voltage
Battery
voltage
SKIA8541E
AUDIO
AV-29
C
D
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F
G
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A
B
AV
3.
CHECK GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect BOSE speaker amp. connector.
3.
Check continuity between BOSE speaker amp. harness connec-
tor B123 terminal 17 and ground.
OK or NG
OK
>> INSPECTION END
NG
>> Repair harness or connector.
Steering Wheel Audio Control Switch Does Not Operate
NKS002FB
WITHOUT TELEPHONE SYSTEM
1.
CHECK STEERING WHEEL AUDIO CONTROL SWITCH RESISTANCE
1.
Turn ignition switch OFF.
2.
Disconnect of steering wheel audio control switch connector.
3.
Check resistance of steering wheel audio control switch. Refer to
AV-26, "Steering Wheel Audio Control
.
YES or NO
YES
>> GO TO 2.
NO
>> Replace steering wheel audio control switch.
2.
CHECK STEERING WHEEL AUDIO CONTROL SWITCH CIRCUIT
1.
Disconnect audio unit connector.
2.
Check continuity between audio unit harness connector M39
and combination switch (spiral cable) harness connector M23.
OK or NG
OK
>> GO TO 3.
NG
>> Repair harness or connector.
17 - Ground
: Continuity should exist.
SKIA4041E
Resistance value is OK?
Terminals
Continuity
Connector
Terminal
Connector
Terminal
M39
22
M23
24
Yes
23
32
25
31
SKIA4042E
AV-30
AUDIO
3.
CHECK AUDIO UNIT
1.
Connect audio unit connector.
2.
Turn ignition switch ON.
3.
Check voltage between audio unit harness connector M39 ter-
minal 22, 23 and ground.
OK or NG
OK
>> Replace combination switch (spiral cable).
NG
>> Replace audio unit.
WITH TELEPHONE SYSTEM
Refer to
AV-105, "Steering Wheel Audio Control Switch Does Not Operate"
Speed Sensitive Volume System Does Not Work
NKS002FC
1.
CHECK VEHICLE SPEED OPERATION
Does speedometer operate normally?
YES or NO
YES
>> GO TO 2.
NO
>> Perform combination meter trouble diagnosis. Refer to
DI-15, "Vehicle Speed Signal Inspection"
in “COMBINATION METERS”.
2.
CHECK HARNESS
1.
Turn ignition switch OFF.
2.
Disconnect audio unit connector and combination meter connector.
3.
Check continuity between audio unit harness connector M39 ter-
minal 18 and combination meter harness connector M19 termi-
nal 14.
4.
Check continuity between audio unit harness connector M39 ter-
minal 18 and ground.
OK or NG
OK
>> GO TO 3.
NG
>>
●
Check connector housings for disconnected or loose
terminals.
●
Repair harness or connector.
22 - Ground
: Approx. 5 V
23 - Ground
: Approx. 5 V
SKIB0206E
18 – 14
: Continuity should exist.
18 – Ground
: Continuity should exist.
PKIB3843E
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