NISSAN LATIO 2008 Service Repair Manual

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 >
C
D
E
F
G
H
I
J
L
MA
B
AV
N
O
P
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 >
C
D
E
F
G
H
I
J
L
MA
B
AV
N
O
P
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

AV-26
< SERVICE INFORMATION >
AUDIO
Satellite Radio Tuner (Factory Installed) Left Channel Audio Signal Circuit Inspection
INFOID:0000000001704666
1.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect satellite radio tuner (factory installed) connector B30 (A) and audio unit connector M45 (B).
3. Check continuity between satellite radio tuner (factory installed) and audio unit.
4. Check continuity between satellite radio tuner (factory installed)
and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.
2.CHECK LEFT CHANNEL AUDIO SIGNAL
1. Connect satellite radio tuner (factory installed) and audio unit.
2. Turn ignition switch ON.
3. Check signal between satellite radio tuner (factory installed)
connector B30 terminals 21 and 22 with CONSULT-Ill or oscillo-
scope.
OK or NG
OK >> Replace audio unit. Refer to AV-36, "Removal and
Installation" .
NG >> Replace satellite radio tuner. Refer to AV-36, "
Removal
and Installation" .
Satellite Radio Tuner (Factory Installed) Right Channel Audio Signal Circuit Inspection
INFOID:0000000001704667
1.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect satellite radio tuner (factory installed) connector B30 (A) and audio unit connector M45 (B).
3. Check continuity between satellite radio tuner (factory installed) and audio unit.
Te r m i n a l s
Continuity Satellite radio tuner Audio unit
Connector Terminal Connector Terminal
A: B3021
B: M4541
Ye s
22 42
Te r m i n a l s
Continuity Satellite radio tuner
—
Connector Terminal
A: B3021
Ground No
22
WKIA4547E
21 - 22 : Refer to AV-20, "Terminal
and Reference Value for Sat-
ellite Radio Tuner" .
WKIA4548E

AUDIO
AV-27
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
L
MA
B
AV
N
O
P
4. Check continuity between satellite radio tuner (factory installed)
and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.
2.CHECK RIGHT CHANNEL AUDIO SIGNAL
1. Connect satellite radio tuner (factory installed) and audio unit.
2. Turn ignition switch ON.
3. Check signal between satellite radio tuner (factory installed)
connector B30 terminals 23 and 24 with CONSULT-lIl or oscillo-
scope.
OK or NG
OK >> Replace audio unit. Refer to AV-36, "Removal and
Installation" .
NG >> Replace satellite radio tuner. Refer to AV-36, "
Removal
and Installation" .
Steering Switch Check (With Bluetooth)INFOID:0000000001704668
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.
4. Check continuity between Bluetooth control unit and ground.
Te r m i n a l s
Continuity Satellite radio tuner Audio unit
Connector Terminal Connector Terminal
A: B3023
B: M4543
Ye s
24 44
Te r m i n a l s
Continuity Satellite radio tuner
—
Connector Terminal
A: B3023
Ground No
24
WKIA4549E
23 - 24 : Refer to AV-20, "Terminal
and Reference Value for Sat-
ellite Radio Tuner" .
WKIA4550E
Te r m i n a l s
Continuity AB
Connector Terminal Connector Terminal
B12112
M3024
Ye s 13 32
14 31
WKIA5348E

AV-28
< SERVICE INFORMATION >
AUDIO
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 M43 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 M102.
2. Check continuity between spiral cable terminals.
OK or NG
OK >> GO TO 4.
NG >> Replace spiral cable. Refer to SRS-36, "
Removal and
Installation" .
4.CHECK STEERING SWITCH RESISTANCE
Check resistance between spiral cable connector M102 terminals.
OK or NG
Te r m i n a l s
Continuity (+)
(–)
Connector Terminal
B12112
Ground No 13
14
Te r m i n a l s
Continuity (A) (B)
Connector Terminal Connector Terminal
M436
B12117
Ye s 15 19
16 18
WKIA5349E
16 - 32 : Continuity should exist.
17 - 31 : Continuity should exist.
20 - 24 : Continuity should exist.
WKIA4424E
Terminal Signal name ConditionResistance
(Ω)
(Approx.)
16 17Seek (down) Depress Seek down switch. 165
Phone/Send Depress Phone/Send switch. 0
Volume (down) Depress volume down switch. 487
20 17Seek (up) Depress Seek up switch. 165
Phone/End Depress Phone/End switch. 0
Volume (up) Depress volume up switch. 487
LKIA0191E

AUDIO
AV-29
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
L
MA
B
AV
N
O
P
OK >> Inspection End.
NG >> Replace steering switch. Refer to AV-36, "
Removal and Installation" .
Sound Is Not Heard from Front Door Speaker (Base System)INFOID:0000000001704669
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.
Te r m i n a l s
Continuity A B
Connector Terminal Connector Terminal
M432
D12+
Ye s 3-
11
D112+
12 -
Te r m i n a l s
Continuity Audio unit
—
Connector Terminal
M432
Ground No 3
11
12
WKIA5444E

AV-30
< SERVICE INFORMATION >
AUDIO
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-36, "Removal and Instal-
lation" or AV-36, "Removal and Installation" .
NG >> Replace audio unit. Refer to AV-36, "
Removal and
Installation" .
Sound Is Not Heard from Rear Door Speaker (Base System)INFOID:0000000001704670
1.HARNESS CHECK
1. Disconnect audio unit connector and rear door speaker connector.
2. Check continuity between audio unit (A) connector terminal and
rear door speaker (B) 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
Te r m i n a l s
Condi-
tionReference
signal (+) (-)
Con-
nec-
torTe r m i -
nalCon-
nec-
torTe r m i -
nal
M432
M433
Receive
audio
signal 11 1 2
WKIA5352E
SKIA0177E
Te r m i n a l s
Continuity AB
Connector Terminal Connector Terminal
M435
D207-
Ye s 4+
14
D307-
13 +
Te r m i n a l s
Continuity Audio unit
—
Connector Terminal
M435
Ground No 4
14
13
WKIA5353E

AUDIO
AV-31
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
L
MA
B
AV
N
O
P
1. Connect audio unit connector and rear 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-36, "Removal and Instal-
lation" .
NG >> Replace audio unit. Refer to AV-36, "
Removal and
Installation" .
Sound Is Not Heard from Front Door Speaker or Tweeter (Mid Level and Premium Sys-
tem)
INFOID:0000000001704671
1.HARNESS CHECK
1. Disconnect audio unit connector and front door speaker and tweeter connector (LH or RH).
2. Check continuity between audio unit harness connector terminal
and front door speaker and tweeter harness connector terminal.
3. Check continuity between audio unit harness connector terminal
and ground.
Te r m i n a l s
Condi-
tionReference
signal (+) (-)
Con-
nectorTe r m i -
nalCon-
nectorTe r m i -
nal
M434
M435
Receive
audio
signal 13 14
WKIA5354E
SKIA0177E
Te r m i n a l s
Continuity Audio unit. Speaker or tweeter
Connector Terminal Connector Terminal
M432
M46+
Ye s 3-
11
M47+
12 -
2
D12+
3-
11
D112+
12 -
WKIA5351E