NISSAN TEANA 2008 Service Manual

AV
AUDIO UNIT
AV-27
< ECU DIAGNOSIS >[AUDIO SYSTEM]
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MB A
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P13
(L)14
(B/W)Sound signal rear RH OutputIgnition
switch
ONSound output.
15
(L/B)GroundSteering switch signal
ground—Ignition
switch
ON—0 V
16
(GR/L)15
(L/B)Steering switch signal B InputIgnition
switch
ONKeep pressing VOL DOWN
switch.0 V
Keep pressing VOL UP
switch.1.0 V
Except for above. 5.0 V
19
(Y)Ground Battery power supply InputIgnition
switch
OFF— Battery voltage
21
(R)GroundAV communication signal
(L)Input/
Output—— —
22
(L)GroundAV communication signal
(H)Input/
Output—— —
33 — FM sub Input — — —
34 — AM-FM main Input — — —
35 Ground Antenna amp. ON signal OutputIgnition
switch
ACC—12.0 V Te r m i n a l
(Wire color)Description
ConditionReference value
(Approx.)
+ – Signal nameInput/
Output
SKIB3609E

AV-28
< ECU DIAGNOSIS >[AUDIO SYSTEM]
AUDIO UNIT
Wiring Diagram — BASE AUDIO —
INFOID:0000000003765604
JCNWM0876GB

AV
AUDIO UNIT
AV-29
< ECU DIAGNOSIS >[AUDIO SYSTEM]
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JCNWM0877GB

AV-30
< ECU DIAGNOSIS >[AUDIO SYSTEM]
AUDIO UNIT
JCNWM0878GB

AV
AUDIO UNIT
AV-31
< ECU DIAGNOSIS >[AUDIO SYSTEM]
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JCNWM0879GB

AV-32
< ECU DIAGNOSIS >[AUDIO SYSTEM]
AUDIO UNIT
JCNWM0880GB

AV
AUDIO UNIT
AV-33
< ECU DIAGNOSIS >[AUDIO SYSTEM]
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MB A
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JCNWM0881GB

AV-34
< SYMPTOM DIAGNOSIS >[AUDIO SYSTEM]
AUDIO SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
AUDIO SYSTEM SYMPTOMS
Symptom TableINFOID:0000000003765605
RELATED TO AUDIO
RELATED TO STEERING SWITCH
Symptoms Check items Possible malfunction location / Action to take
Audio sound is not heard.No sound from all speakers.Audio unit malfunction.
Refer to AV- 3 7 , "
Exploded View".
There is no sound from one of speakers.Sound signal malfunction between audio unit and speaker
on the side where there is no sound.
AM/FM radio is not received. Other audio sounds are normal. Antenna amp. ON signal circuit
 Antenna feeder
 Glass antenna
Audio display does not work. — Audio display power supply and ground circuits.
 AV communication circuits between audio unit and au-
dio display.
Symptoms Inspection location / Probable malfunction location
None of the steering switch operations work.Steering switch signal GND circuit
Refer to AV- 2 4 , "
Diagnosis Procedure".
Only specified switch (1) cannot be operated.Steering switch
Refer to AV- 4 2 , "
Exploded View".
“SOURCE”, “SEEK UP”, “SEEK DOWN” switches of steering
switch are not operational.Steering switch signal A circuit
Refer to AV- 2 0 , "
Diagnosis Procedure".
”VOL UP“, “VOL DOWN” switches of steering switch are not
operational.Steering switch signal B circuit
Refer to AV- 2 2 , "
Diagnosis Procedure".

AV
NORMAL OPERATING CONDITION
AV-35
< SYMPTOM DIAGNOSIS >[AUDIO SYSTEM]
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NORMAL OPERATING CONDITION
DescriptionINFOID:0000000003765606
NOTE:
 Audio operation information, refer to Owner's Manual.
 The majority of the audio concerns are the result of outside causes (bad CD, electromagnetic interference,
etc.).
NOISE
The following noise results 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 mountains or buildings.
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 then determine the cause.
NOTE:
The source of the noise can be easily found by listening to the noise while removing the fuses of electrical
components, one by one.
Types of Noise and Possible Causes
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
The occurrence of the noise is linked with the operation of the fuel pump.  Fuel pump condenser
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, audio unit 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
 Poor ground of antenna feeder line
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

AV-36
< PRECAUTION >[AUDIO SYSTEM]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003960541
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the “SRS AIRBAG” and
“SEAT BELT” of this Service Manual.
WARNING:
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIRBAG”.
 Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.
Precaution for Trouble DiagnosisINFOID:0000000003765608
AV COMMUNICATION SYSTEM
 Do not apply voltage of 7.0 V or higher to the measurement terminals.
 Use the tester with its open terminal voltage at 7.0 V or less.
 Turn ignition switch OFF and disconnect the battery cable from the negative terminal before checking the cir-
cuit.
Precaution for Harness RepairINFOID:0000000003765609
AV COMMUNICATION SYSTEM
 Solder the repaired parts, and wrap with tape. [Frays of twisted line
must be within 110 mm (4.33 in).]
 Do not perform bypass wire connections for the repair parts. (The
spliced wire will become separated and the characteristics of
twisted line will be lost.)
PKIA0306E
PKIA0307E