2009 NISSAN LATIO ignition

35, " Sound Is Not Heard from S
ubwoofer (Premium System) " .
• The majority of the audio malfunctions are the result of outside causes (damaged CD, electromagnetic inter-
ference, etc.). Check the symptom s 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 s ent directly from the broadcast station arriving at the
antenna at a different time from the waves that reflect off of mountains or buildings.
Noise Inspection INFOID:0000000004306967
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-23, " 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-30, " Sound Is Not Heard from Front Door
Speaker (Base System) " or
AV-32, " Sound Is Not Heard from
Front Door Speaker or Tweeter (Mid Level and Premium Sys-
tem) " .
• Front speaker. Refer to AV-30, " Sound Is Not Heard from Front
Door Speaker (Base System) " or
AV-32, " 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-31, " Sound Is Not Heard from Rear Door
Speaker (Base System) " or
AV-33, " Sound Is Not Heard from
Rear Door Speaker (Mid Level and Premium System) " .
• Rear speaker. Refer to AV-31, " Sound Is Not Heard from Rear
Door Speaker (Base System) " or
AV-33, " Sound Is Not Heard
from Rear Door Speaker (Mid Level and Premium System) " .
• Tweeter (mid level and premium system) AV-32, " Sound Is Not
Heard from Front Door Speaker or Tweeter (Mid Level and Pre-
mium System) " or
AV-33, " Sound Is Not Heard from Rear Door
Speaker (Mid Level and Premium System) " .
• Subwoofer (premium system). Refer to AV-35, " Sound Is Not
Heard from Subwoofer (Premium System) " .
• Audio unit. Refer to AV-23, " Power Supply Circuit Inspection " .
No sound can be heard from radio or noise is heard. • Antenna feeder. Refer to
AV-42 .
• Antenna. Refer to AV-42 .
• Audio unit. Refer to AV-23, " Power Supply Circuit Inspection " .

AV
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Power Supply Circuit Inspection
INFOID:0000000004306968OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-3 .
OK >> With premium system, GO TO 3.
NG >> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector. Unit Terminals Signal name Fuse No.
Audio unit 19 Battery power 27
7 Ignition switch ACC or ON 20
Subwoofer (with premium audio) 1 Ignition switch ACC or ON 27 Unit
Terminal No.
OFF ACC ON
(+)
(-)
Connector Terminal
Audio unit M43 19 Ground
Battery
voltage Battery
voltage Battery
voltage
7 Ground 0V Battery
voltage Battery
voltage

AUDIO
AV-33
< SERVICE INFORMATION >
C
D E
F
G H
I
J
L
M A
B AV
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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, front door speaker connector and tweeter connector.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between audio unit connector terminals with CONSULT-III or oscilloscope.
OK or NG OK >> Replace front speaker. Refer to
AV-37, " Removal and
Installation " .
NG >> Replace audio unit. Refer to AV-37, " Removal and
Installation " .
Sound Is Not Heard from Rear Door Sp eaker (Mid Level and Premium System)
INFOID:00000000043069771.
HARNESS CHECK
1. Disconnect audio unit connector and rear door speaker connector. Terminals
Continuity
Audio unit
—
Connector Terminal
M43 2
Ground No
3
11
12 Terminals
Condi-tion Reference
signal
(+) (-)
Con-
nector Termi-
nal Con-
nector Termi-
nal
M51 2
M51 3
Receive
audio
signal
11 12 WKIA5352ESKIA0177E

AV-34< SERVICE INFORMATION >
AUDIO
2. Check continuity between audio unit harness connector terminal and speaker harness connector terminal.
3. Check continuity between audio unit harness connector terminal and ground.
OK or NG OK >> GO TO 2.
NG >> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector. 2.
REAR SPEAKER SIGNAL CHECK
1. Connect audio unit connector and rear door 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.
OK or NG OK >> Replace speaker. Refer to
AV-37, " Removal and Instal-
lation " .
NG >> Replace audio unit. Refer to AV-37, " Removal and
Installation " .
Terminals
Continuity
Audio unit Speaker
Connector Terminal Connector Terminal
M43 4
D207 +
Yes
5 -
13 D307 +
14 -
Terminals Continuity
Audio unit
—
Connector Terminal
M43 4
Ground No
5
13
14 WKIA5353E
Terminals
Condi-tion Reference
signal
(+) (-)
Con- nec- tor Termi-
nal Con-
nec- tor Termi-
nal
M43 5
M43 4
Re-
ceive
audio
signal
14 13 WKIA5354ESKIA0177E

AV
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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 must 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.
During this time the Bluetooth ON indicator will flash until initialization is complete. If a phone is present in the
vehicle and paired with the Bluetooth control unit, NIS SAN Voice Recognition will then become active and the
Bluetooth ON indicator will remain on. Bluetooth te lephone functions can be turned off using the NISSAN
Voice Recognition system. For Bluetooth control unit location, refer to AV-44, " Component Parts and Harness
Connector Location " .
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 usi ng 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 c onsole assembly. The Bluetooth microphone sends a signal
to the Bluetooth control unit. The Bluetooth microphone can be actively tested during self-diagnosis. For Blue-
tooth microphone location, refer to AV-44, " Component Parts and Harness Connector Location " .
Bluetooth ON Indicator The Bluetooth ON indicator is located in the overhead console. The indicator will flash during power up while
the Bluetooth control unit is initializing. This process may take up to 10 seconds. If a phone is present in the
vehicle and paired with the Bluetooth control unit, the indi cator will remain on to indicate that the system is
ready for voice commands. The indicator flashes duri ng self-diagnosis. For Bluetooth ON indicator location,
refer to AV-44, " 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.

AV
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Bluetooth Control Unit
Self-Diagnosis Function INFOID:0000000004306987
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.
BLUETOOTH CONTROL UNIT INITIALIZATION CHECKS
• Internal control unit failure
• Bluetooth antenna connection open or shorted
• Steering wheel audio control swit ches (SEND/END) stuck closed
• Vehicle speed pulse count
• Bluetooth Microphone connection test (with playback to operator)
• Bluetooth inquiry check
SELF-DIAGNOSIS MODE 15 (G) Ground
Bluetooth
ON indicator
LED Output – Bluetooth control
unit initialized
and paired with
phone Battery voltage
Bluetooth ON indica-
tor inoperative.
17 (GR) Ground Audio unit
switch 1 OutputACC/
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 2 OutputACC/
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 – – 5V
Bluetooth Micro-
phone inoperative.
33 – Bluetooth
antenna sig-
nal Input – – – –
Terminal
(Wire color) ItemSignal
input/
output Condition
Reference value
(Approx.) Example of symptom
+ – Ignition
switch Operation

AV
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OK or NG OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate caus e of malfunction before installing new fuse. Refer to PG-3 .
OK >> GO TO 3.
NG >> Check harness for open between Bluetooth control unit and fuse. OK >> Inspection End.
NG >> Repair or replace harness.
Basic Inspection of Hands-Free Phone INFOID:0000000004306990OK >> GO TO 2
NG >> GO TO 3 Terminals Ignition switch position
(+) (–) OFF ACC ON
Connector Terminal
B121 1
Ground Battery
voltage Battery
voltage Battery
voltage
2 0V Battery
voltage Battery
voltage
3 0V 0V Battery
voltage

BCS
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Normal status
• When BCM is not in sleep status, OUTPUT te rminals (1-5) each turn ON-OFF every 10ms.
Sleep status
• When BCM is in sleep mode, transistors of OUTP UT 1 and 5 stop the output, and BCM enters low-cur-
rent-consumption mode. OUTPUTS (2, 3, and 4) turn ON-OFF at 60ms intervals, and receives lighting
switch input only.
CAN COMMUNICATION CONTROL CAN communication allows a high rate of information through the two communication lines (CAN-L, CAN-H)
connecting the various control units in the system. Each control unit transmits/receives data, but selectively
reads required data only.
BCM STATUS CONTROL BCM changes its status depending on the operation stat us in order to save power consumption.
1. CAN communication status • With ignition switch ON, CAN communicates with other control units normally.
• Control by BCM is being operated properly.
• When ignition switch is OFF, switching to sleep mode is possible.
• Even when ignition switch is OFF, if CAN co mmunication with IPDM E/R and combination meter is
active, CAN communication status is active.
2. Sleep transient status • This status shuts down CAN communication when ignition switch is turned OFF.
• It transmits sleep request signal to IPDM E/R and combination meter.
• Two seconds after CAN communication of all control units stops, CAN communication switches to inac-
tive status.
3. CAN communication inactive status • With ignition switch OFF, CAN communication is not active.
• With ignition switch OFF, control performed only by BCM is active.
• Three seconds after CAN communication of all cont rol units stops, CAN communication switches to
inactive status.
4. Sleep status • BCM is activated with low current consumption mode.
• CAN communication is not active.