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Power Supply Circuit Inspection
INFOID:0000000005395319
1.CHECK FUSE
Check that the following fuses of the audio unit are not blown.
OK or NISSAN LATIO 2010 Service Repair Manual AV-22
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Power Supply Circuit Inspection
INFOID:0000000005395319
1.CHECK FUSE
Check that the following fuses of the audio unit are not blown.
OK or](/manual-img/5/57358/w960_57358-418.png)
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AUDIO
Power Supply Circuit Inspection
INFOID:0000000005395319
1.CHECK FUSE
Check that the following fuses of the 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-
4 .
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.GROUND CIRCUIT CHECK
Check continuity between audio uni t (premium system) harness con-
nectors M43 (A), M44 (B) terminals 20, 61 and ground.
OK or NG
OK >> Inspection End.
NG >> • Check connector housings for disconnected or loose
terminals.
• Repair harness or connector.
Steering Switch Check (With Bluetooth)INFOID:0000000005395324
1.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect Bluetooth control unit connector and spiral cable connector M30.
3. Check continuity between Bluetooth control unit (A) connector B121 terminals 12, 14, and 13 and spiral
cable (B) connector M30 terminals 24, 31, and 32.
Unit Terminals Signal name Fuse No.
Audio unit 19
Battery power 27
7 Ignition switch ACC or ON 20
UnitTe r m i n a l N o .
OFF ACC ON
(+)
(-)
Connector Terminal
Audio unit M43 19 Ground
Battery
voltage Battery
voltage Battery
voltage
7Ground0V Battery
voltage Battery
voltage
WKIA5345E
Continuity should exist.
AWNIA2078ZZ
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4. Check continuity between Bluetooth control unit and ground.
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4. Check continuity between Bluetooth control unit and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
2.CHECK HARNESS
1. Disconnect audio unit connector.
2. Check continuity between audio unit (A) connector M 43 terminals 6, 15, and 16 and Bluetooth control unit
(B) connector B121 terminals 17, 19, and 18.
OK or NG
OK >> GO TO 4.
NG >> Repair harness.
3.SPIRAL CABLE CHECK
1. Disconnect spiral cable connector M31.
2. Check continuity between spiral cable terminals.
OK or NG
OK >> GO TO 4.
NG >> Replace spiral cable. Refer to SRS-37, "
Removal and
Installation" .
4.CHECK STEERING SWITCH RESISTANCE
Check resistance between spiral cable connector M31 terminals.
Te r m i n a l s
Continuity
AB
Connector Terminal Connector Terminal
B121 12
M30 24
Ye s
13 32
14 31
Te r m i n a l s Continuity
(+)
(–)
Connector Terminal
B121 12
Ground No
13
14
WKIA5348E
Te r m i n a l s
Continuity
(A) (B)
Connector Terminal Connector Terminal
M43 6
B121 17
Ye s
15 19
16 18
WKIA5349E
16 - 32 : Continuity should exist.
17 - 31 : Continuity should exist.
20 - 24 : Continuity should exist.
WKIA4424E
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AUDIO
OK or NG
OK >> Inspection End.
NG >> Replace steering switch. Refer to AV-29, "
Removal and Installation" .
Sound Is Not Heard fr
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OK or NG
OK >> Inspection End.
NG >> Replace steering switch. Refer to AV-29, "
Removal and Installation" .
Sound Is Not Heard fr
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AUDIO
OK or NG
OK >> Inspection End.
NG >> Replace steering switch. Refer to AV-29, "
Removal and Installation" .
Sound Is Not Heard fr
om Front Door Speaker (Base System)INFOID:0000000005395325
1.HARNESS CHECK
1. Disconnect audio unit connector and front door speaker connector (LH or RH).
2. Check continuity between audio unit connector M43 (A) terminal and suspect speaker connector (B) terminal.
3. Check continuity between audio unit connector M43 terminal and ground.
OK or NG
OK >> GO TO 2.
NG >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector.
2.FRONT SPEAKER SIGNAL CHECK
1. Connect audio unit connector and suspect speaker connector.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
Terminal Signal name ConditionResistance
(Ω)
(Approx.)
16 17 Seek (down) Depress Seek down switch.
165
Phone/Send Depress Phone/Send switch. 0
Volume (down) Depress volume down switch. 487
20 17 Seek (up) Depress Seek up switch.
165
Phone/End Depress Phone/End switch. 0
Volume (up) Depress volume up switch. 487
LKIA0191E
Te r m i n a l s
Continuity
A B
Connector Terminal Connector Terminal
M43 2
D12 +
Ye s
3-
11 D112 +
12 -
Te r m i n a l s Continuity
Audio unit
—
Connector Terminal
M43 2
Ground No
3
11
12
WKIA5444E
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AUDIO
Removal
1. Remove the front pillar garnish. Refer to
EI-39.
2. Remove the tweeter screw (A), disconnect the connector and remove the tweeter (1).
Installation
Installation is in the reverse order of removal.
STEERING WHEEL AUDIO CONTROL SWITCHES
Removal
1. Remove the steering wheel. Refer to PS-7, "Removal and Installation".
2. Remove the steering wheel finisher cover.
3. Remove the screws and the steering wheel audio control switches.
Installation
Installation is in the reverse order of removal.
SKIB4730E
1. Steering wheel finisher cover 2. Steering wheel 3. Steering wheel audio control switch-
es
A. Screws
LKIA0769E
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Component Parts and Har ness Connector LocationINFOID:0000000005395333
System DescriptionIN NISSAN LATIO 2010 Service Repair Manual TELEPHONEAV-35
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System DescriptionIN](/manual-img/5/57358/w960_57358-431.png)
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System DescriptionINFOID:0000000005395334
BLUETOOTH® HANDS-FREE PHONE SYSTEM
Refer to the Owner's Manual for Bluetooth telephone system operating instructions.
NOTE:
Cellular telephones must have their wireless connection set up (paired) before using the Bluetooth telephone
system.
Bluetooth telephone system allows users who have a Bl uetooth cellular telephone to make a wireless connec-
tion between their cellular telephone and the Bluetooth control unit. Hands-free cellular telephone calls can be
sent and received. Personal memos can be created using the NISSAN Voice Recognition system. Some Blue-
AWNIA2073ZZ
1. Audio unit M43, M44 2. Steering wheel audio control
switches 3. Combination meter M24
4. Bluetooth microphone R15 5. Bluetooth antenna (hatchback) 6. Bluetooth control unit B121, B122 (hatch-
back) [view with luggage side lower finish-
er (RH) removed]
7. Bluetooth antenna (sedan) 8. Bluetooth control unit B121, B122
(sedan) (view with trunk side fin-
isher RH removed)
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tooth cellular telephones may not be recognized by t
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tooth cellular telephones may not be recognized by t
he Bluetooth control unit. When a cellular telephone or
the Bluetooth control unit is replaced, the telephone mu st be paired with the Bluetooth control unit. Different
cellular telephones may have different pairing procedures. Refer to the cellular telephone operating manual.
Bluetooth Telephone System Diagram
Bluetooth Control Unit
When the ignition switch is turned to ACC or ON, the Bluetooth control unit will power up. During power up, the
Bluetooth control unit is initialized and performs various self checks. Initialization may take up to 10 seconds. If
a phone is present in the vehicle and paired with the Bluetooth control unit, NISSAN Voice Recognition will
then become active. Bluetooth telephone functions can be turned off using the NISSAN Voice Recognition
system. For Bluetooth contro l unit location, refer to AV-35, "
Component Parts and Harness Connector Loca-
tion".
Steering Wheel Audio Control Switches
When buttons on the steering wheel audio control switch are pushed, the resistance in steering wheel audio
control switch circuit changes depending on which button is pushed. The Bluetooth control module uses this
signal to perform various functions while navigating through the voice recognition system.
The following functions can be performed using the steering wheel audio control switch:
• Initiate Self Diagnosis of the Bluetooth telephone system
• Start a voice recognition session
• Answer and end telephone calls
• Adjust the volume of calls
• Record memos
Volume Switch
Call volume can be adjusted using the audio unit volume switch.
Bluetooth Microphone
The Bluetooth microphone is located in the roof console assembly. The Bluetooth microphone sends a signal
to the Bluetooth control unit. The Bluetooth microphone c an be actively tested during self-diagnosis. For Blue-
tooth microphone location, refer to AV-35, "
Component Parts and Harness Connector Location".
Audio Unit
The audio unit receives signals from the Bluetooth control unit and sends audio signals to the speakers.
AWNIA2074GB
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Terminal and Reference Value for Bluetooth Control UnitINFOID:0000000005395337
AWNIA1988GB
Te r m i n a l
(Wire color) ItemSignal
input/
output Condition
Reference value
(Approx.) Example of symptom
+– Ignition
switch Operation
1 (R) Ground Battery pow-
erInput –
–Battery voltage System does not
work properly.
2 (L) Ground ACC power Input ACC/
ON –
Battery voltage System does not
work properly.
3 (LG) Ground IGN power Input ON/
START –
Battery voltage System does not
work properly.
4 (B) – Ground – – –– –
6 – Shield – –– – –
7 (R/W) 8 (R/L) Mic-in signal Input – ––Bluetooth Micro-
phone inoperative.
9 (LG) 10 (V) Audio out Output ACC/
ON Bluetooth control
unit sends audio
signal Audio can not be
heard.
11(O) – Mute Output – –5VMute inoperative.
12 (W) Ground Remote
control
switch 1
Input
ACC/
ON Press MODE
switch
0V
Steering wheel audio
control switches do
not function.
Press SEEK UP
switch
0.75V
Press VOL UP
switch 2V
Except for above 5V
13 (L) Ground Remote
control
switch 2Input
ACC/
ON Press POWER
switch
0V
Steering wheel audio
control switches do
not function.
Press SEEK
DOWN switch
0.75V
Press VOL
DOWN switch 2V
Except for above 5V
14 (B) – Remote
control
ground
Input –
– –Steering wheel audio
control switches do
not function.
SKIB3609E
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Bluetooth Control Unit Self-Diagnosis Function
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Bluetooth Control Unit Self-Diagnosis Function
INFOID:0000000005395338
The Bluetooth control unit has two diagnostic checks. The first diagnostic check is performed automatically
every ignition cycle during control unit initialization. The second diagnostic check is performed by the techni-
cian using the steering wheel audio control switches prior to trouble diagnosis.
17 (GR) Ground Audio unit
switch 1OutputACC/
ON Press Phone/End
switch
0V
Steering wheel audio
controls do not func-
tion.
Press SEEK UP
switch
0.75V
Press VOL UP
switch 2V
Except for above 5V
18 (P) Ground Audio unit
switch 2OutputACC/
ON Press Phone/
Send switch
0V
Steering wheel audio
controls do not func-
tion.
Press SEEK
DOWN switch
0.75V
Press VOL
DOWN switch 2V
Except for above 5V
19 (B) Ground Audio unit
switch
ground
Output –
––Steering wheel audio
controls do not func-
tion.
20 (B) – Cont-1 – – –– –
21 (B) – Cont-2 – – –– –
23 (B) – Cont-4 – – –– –
28 (O) Ground Vehicle
speed signal
(8–pulse)
Input ON When vehicle
speed is approx.
40 km/h (25
MPH) Speed sensitive vol-
ume is inoperative.
29 (B) Ground Bluetooth
Microphone
power
Output –
–5VBluetooth Micro-
phone inoperative.
33 – Bluetooth
antenna sig-
nalInput –
– – –
35 (L) — M CAN + — — —— —
36 (P) — M CAN - — — —— —
37 — M CAN
shield—— —
——
39 (Y/R) — M CAN
jumper 1
—— —
——
40 (Y/R) — M CAN 1 — — —— —
41 (SB) — M CAN
jumper 2—— —
——
42 (SB) — M CAN 2 — — —— —
Te r m i n a l
(Wire color) ItemSignal
input/
output Condition
Reference value
(Approx.) Example of symptom
+– Ignition
switch Operation
PKIC0643E
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