2008 NISSAN LATIO audio

AV-18
< SERVICE INFORMATION >
AUDIO
*1: With premium system
*2: With Bluetooth42 (R) 41 (G)Audio left
channel
sound signal
from satel-
lite radio
tunerInput ONReceive audio
signalNo sound from sat-
ellite radio tuner
left channel.
44 (B) 43 (W)Audio right
channel
sound signal
from satel-
lite radio
tunerInput ONReceive audio
signalNo sound from sat-
ellite radio tuner
right channel.
45 –Shield
ground (au-
dio signal)–– – 0V –
46 –Shield
ground (da-
ta)–– – 0V –
48 (B) GroundSatellite ra-
dio tuner re-
quest to
audio unitInput ONTurn audio unit
ON 5VSatellite radio tun-
er does not oper-
ate properly.
49 (L) Ground Audio RX Input ONOperate audio
volume Satellite radio tun-
er audio informa-
tion does not
display properly.
50 (Y) Ground Audio TX Output ONOperate audio
volume Satellite radio tun-
er audio informa-
tion does not
display properly. Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of symp-
tom
+–Ignition
switchOperation
SKIA0177E
SKIA0177E
SKIA4403E
SKIA4402E

AUDIO
AV-19
< SERVICE INFORMATION >
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Subwoofer Harness Connector Terminal Layout (Premium Audio System)INFOID:0000000001704657
Terminal and Reference Value for Subwoofer (Premium Audio System)INFOID:0000000001704658
Satellite Radio Tuner Harness Connector Terminal LayoutINFOID:0000000001704659
WKIA5441E
Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)
+–Ignition
switchOperation
1 (R) Ground Battery power supply Intput OFF – Battery voltage
2 (O/L) 6 (W/L)Audio signal subwoof-
erIntput ON Receive audio signal
3 (B) Ground Ground – ON – 0 V
4 (LG) GroundSubwoofer amp. ON
signalInput ON – Battery voltage
5–Shield –– – –
SKIB3609E
LKIA0735E

AV-20
< SERVICE INFORMATION >
AUDIO
Terminal and Reference Value for Satellite Radio Tuner
INFOID:0000000001704660
Trouble DiagnosisINFOID:0000000001704661
NOTE:
The subwoofer (premium system) may be inoperative if the audio unit harness connectors have not been con-
nected in the proper sequence (when the battery remains connected). The proper sequence is to connect M44
Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Vol tag e
(Approx.)
+–Ignition
switchOperation
22 (R) 21 (G) Audio signal LH Output ON Receive audio signal.
24 (B) 23 (W) Audio signal RH Output ON Receive audio signal.
25 – Shield – – – –
26 – Data ground ON 0V
28 (B) GroundREQ1
(SAT-AUDIO)Output ONSet to the satellite radio
mode
29 (R/L) GroundCommunication signal
(SAT-AUDIO)Output ONSet to the satellite radio
mode
30 (R/W) GroundCommunication signal
(AUDIO-SAT)Input ONSet to the satellite radio
mode
32 (R)
GroundBattery power supply
InputOFF
−Battery voltage
36 (L) ACC power supply ACC
37 – Antenna signal – – –
SKIB3609E
SKIB3609E
SKIB3825E
SKIB3824E
SKIB3826E

AUDIO
AV-21
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and M45 first followed by M43 last. If the subwoofer is inoperative, be sure to check this condition. Refer to AV-
34, "Sound Is Not Heard from Subwoofer (Premium System)" .
• The majority of the audio malfunctions are the result of outside causes (damaged CD, electromagnetic inter-
ference, 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 malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and oper-
ation 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 the waves sent directly from the broadcast station arriving at the
antenna at a different time from the waves that reflect off of mountains or buildings.
Noise InspectionINFOID:0000000001704662
The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and opera-
tion of each piece of electrical equipment, and determine the cause.
NOTE:
The source of the noise can be found easily by listening to the noise while removing the fuses of electrical
components, one by one.
TYPE OF NOISE AND POSSIBLE CAUSE
Symptom Check item
Audio system does not work properly.• Audio unit power supply circuit. Refer to AV- 2 2 , "
Power Supply
Circuit Inspection" .
• Audio unit. Refer to "Trouble Diagnosis" .
No sound can be heard from all speakers. Audio unit. Refer to "Trouble Diagnosis" .
No sound can be heard from one or several speakers.• Open or short in audio signal circuit between audio unit and front
speaker. Refer to AV- 2 9 , "
Sound Is Not Heard from Front Door
Speaker (Base System)" or AV- 3 1 , "Sound Is Not Heard from
Front Door Speaker or Tweeter (Mid Level and Premium Sys-
tem)" .
• Front speaker. Refer to AV- 2 9 , "
Sound Is Not Heard from Front
Door Speaker (Base System)" or AV- 3 1 , "Sound Is Not Heard
from Front Door Speaker or Tweeter (Mid Level and Premium
System)" .
• Open or short in audio signal circuit between audio unit and rear
speaker. Refer to AV- 3 0 , "
Sound Is Not Heard from Rear Door
Speaker (Base System)" or AV- 3 2 , "Sound Is Not Heard from
Rear Door Speaker (Mid Level and Premium System)" .
• Rear speaker. Refer to AV- 3 0 , "
Sound Is Not Heard from Rear
Door Speaker (Base System)" or AV- 3 2 , "Sound Is Not Heard
from Rear Door Speaker (Mid Level and Premium System)" .
• Tweeter (mid level and premium system) AV- 3 1 , "
Sound Is Not
Heard from Front Door Speaker or Tweeter (Mid Level and Pre-
mium System)" or AV- 3 2 , "Sound Is Not Heard from Rear Door
Speaker (Mid Level and Premium System)" .
• Subwoofer (premium system). Refer to AV- 3 4 , "
Sound Is Not
Heard from Subwoofer (Premium System)" .
• Audio unit. Refer to AV- 2 2 , "
Power Supply Circuit Inspection" .
No sound can be heard from radio or noise is heard.• Antenna feeder. Refer to AV- 4 1
.
• Antenna. Refer to AV- 4 1
.
• Audio unit. Refer to AV- 2 2 , "
Power Supply Circuit Inspection" .

AV-22
< SERVICE INFORMATION >
AUDIO
Power Supply Circuit Inspection
INFOID:0000000001704663
1.CHECK FUSE
Check that the following fuses of the subwoofer (premium system) and audio unit are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-
3 .
2.AUDIO UNIT POWER SUPPLY CIRCUIT CHECK
1. Disconnect audio unit connector.
2. Check voltage between the audio unit and ground.
OK or NG
OK >> With premium system, GO TO 3.
NG >> • Check connector housings for disconnected or loose
terminals.
• Repair harness or connector.
3.SUBWOOFER (PREMIUM SYSTEM) POWER SUPPLY CIRCUIT CHECK
1. Disconnect subwoofer connector.
Occurrence condition Possible cause
Occurs only when engine is ON.A continuous growling noise occurs. The speed of
the noise varies with changes in the engine speed.Ignition components
A whistling noise occurs while the engine speed is
high. A booming noise occurs while the engine is
running and the lighting switch is ON.Generator
Noise only occurs when various
electrical components are oper-
ating.A cracking or snapping sound occurs with the op-
eration of various switches.Relay malfunction, radio malfunction
The noise occurs when various motors are operat-
ing.• Motor case ground
• Motor
The noise occurs constantly, not just under certain conditions.• Rear defogger coil malfunction
• Open circuit in printed heater
A cracking or snapping sound occurs while the vehicle is being driven, especially when
it is vibrating excessively.• Ground wire of body parts.
• Ground due to improper part installation
• Wiring connections or a short circuit
Unit Terminals Signal name Fuse No.
Audio unit19 Battery power 27
7 Ignition switch ACC or ON 20
Subwoofer (with premium audio) 1 Ignition switch ACC or ON 27
UnitTe r m i n a l N o .
OFF ACC ON (+)
(-)
Connector Terminal
Audio unit M4319 GroundBattery
voltageBattery
voltageBattery
voltage
7Ground0VBattery
voltageBattery
voltage
WKIA5345E

AUDIO
AV-23
< SERVICE INFORMATION >
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2. Check voltage between subwoofer (premium system) and
ground.
OK or NG
OK >> GO TO 4.
NG >> • Check connector housings for disconnected or loose
terminals.
• Repair harness or connector.
4.GROUND CIRCUIT CHECK
Check continuity between subwoofer (premium system) harness
connector B29 terminal 3 and ground.
OK or NG
OK >> Inspection End.
NG >> • Check connector housings for disconnected or loose
terminals.
• Repair harness or connector.
Satellite Radio Tuner (Factory Installed) Power and Ground Supply Circuit Inspection
INFOID:0000000001704664
1.CHECK FUSES
Check that the following fuses are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-
3 .
2.POWER SUPPLY CIRCUIT CHECK
1. Turn ignition switch OFF.
2. Disconnect satellite radio tuner (factory installed) connector B30.
3. Check voltage between the satellite radio tuner (factory installed) and ground.
OK or NG
OK >> GO TO 3.
UnitTe r m i n a l N o .
OFF ACC ON (+)
(-)
Connector Terminal
Subwoof-
erB29 1 Ground 0VBattery
voltageBattery
voltage
WKIA5442E
Continuity should exist.
WKIA5443E
Unit Terminals Signal name Fuse No.
Satellite radio tuner (factory in-
stalled)32 Battery power 27
36 Ignition switch ACC or ON 20
UnitTerminal No.
OFF ACC ON (+)
(-)
Connector Terminal
Satellite
radio tuner
(factory in-
stalled)B3032 GroundBattery
voltageBattery
voltageBattery
voltage
36 Ground 0VBattery
voltageBattery
voltage
WKIA4539E

AV-24
< SERVICE INFORMATION >
AUDIO
NG >> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
3.GROUND CIRCUIT CHECK
1. Turn ignition switch OFF.
2. Inspect satellite radio tuner (factory installed) case ground.
3. Disconnect satellite radio tuner (factory installed) connector B30 (A) and audio unit connector M45 (B).
4. Check continuity between satellite radio tuner (factory installed) and audio unit.
OK or NG
OK >> Inspection End.
NG >> • Check connector housings for disconnected or loose
terminals.
• Repair harness, connector or satellite radio tuner (factory installed) case ground.
Satellite Radio Tuner (Factory Installed) Communication Circuit InspectionINFOID:0000000001704665
1.CHECK HARNESS - 1
1. Turn ignition switch OFF.
2. Disconnect satellite radio tuner (factory installed) connector B30 and audio unit connector M45.
3. Check continuity between satellite radio tuner (factory installed)
harness connector B30 (A) terminal 28 and audio unit harness
connector M45 (B) terminal 48
4. Check continuity between satellite radio tuner (factory installed)
harness connector B30 (A) terminal 28 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.
2.CHECK HARNESS - 2
1. Check continuity between satellite radio tuner (factory installed)
harness connector B30 (A) terminal 29 and audio unit harness
connector M45 (B) terminal 49
2. Check continuity between satellite radio tuner (factory installed)
harness connector B30 (A) terminal 29 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3.CHECK HARNESS - 3
Te r m i n a l s
Continuity Satellite radio tuner Audio unit
Connector Terminal Connector Terminal
A: B3025
B: M4545
Ye s
26 46
WKIA4540E
Continuity should exist.
Continuity should not exist.
WKIA4541E
Continuity should exist.
Continuity should not exist.
WKIA4542E

AUDIO
AV-25
< SERVICE INFORMATION >
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1. Check continuity between satellite radio tuner (factory installed)
harness connector B30 (A) terminal 30 and audio unit harness
connector M45 (B) terminal 50
2. Check continuity between satellite radio tuner (factory installed)
harness connector B30 (A) terminal 30 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4.CHECK REQ1 SIGNAL
1. Connect satellite radio tuner (factory installed) connector and audio unit connector.
2. Turn ignition switch to ACC
3. Check signal between satellite radio tuner (factory installed) har-
ness connector B30 terminal 28 and ground with CONSULT-llI
or oscilloscope.
OK or NG
OK >> GO TO 5.
NG >> Replace audio unit. Refer to AV-36, "
Removal and
Installation" .
5.CHECK TXD SIGNAL
Check signal between satellite radio tuner (factory installed) harness
connector B30 terminal 29 and ground with CONSULT-lIl or oscillo-
scope.
OK or NG
OK >> GO TO 6.
NG >> Replace audio unit. Refer to AV-36, "
Removal and
Installation" .
6.CHECK RXD SIGNAL
Check signal between satellite radio tuner (factory installed) harness
connector B30 terminal 30 and ground with CONSULT-Ill or oscillo-
scope.
OK or NG
OK >> Replace satellite radio tuner. Refer to AV-36, "Removal
and Installation" .
NG >> Replace audio unit. Refer to AV-36, "
Removal and
Installation" . Continuity should exist.
Continuity should not exist.
WKIA4543E
28 - Ground : Refer to AV-20, "Terminal
and Reference Value for Satel-
lite Radio Tuner" .
WKIA4544E
29 - Ground : Refer to AV-20, "Terminal
and Reference Value for Satel-
lite Radio Tuner" .
WKIA4545E
30 - Ground : Refer to AV-20, "Terminal
and Reference Value for Satel-
lite Radio Tuner" .
WKIA4546E