Nissan Murano Z51. Manual - part 64

AV

AUDIO SYSTEM SYMPTOMS

AV-35

< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

AUDIO SYSTEM SYMPTOMS

Symptom Table

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RELATED TO AUDIO

Trouble diagnosis chart by symptom

RELATED TO STEERING SWITCH

Trouble diagnosis chart by symptom

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-41, "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.
• Rod antenna.
• Antenna base.

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-24, "Diagnosis Procedure"

.

Only specified switch cannot be operated.

Steering switch.
Refer to 

AV-46, "Exploded View"

.

“SOURCE”, “MENU UP”, “MENU DOWN” switches of steer-
ing switch are not operational.

Steering switch signal A circuit.
Refer to 

AV-20, "Diagnosis Procedure"

.

”VOL UP“, “VOL DOWN” switches of steering switch are not 
operational.

Steering switch signal B circuit.
Refer to 

AV-22, "Diagnosis Procedure"

.

AV-36

< SYMPTOM DIAGNOSIS >

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NORMAL OPERATING CONDITION

NORMAL OPERATING CONDITION

Description

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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

PRECAUTIONS

AV-37

< PRECAUTION >

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PRECAUTION

PRECAUTIONS

FOR USA AND CANADA

FOR USA AND CANADA : Precaution for Supplemental Restraint System (SRS) "AIR 
BAG" and "SEAT BELT PRE-TENSIONER"

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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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” 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 AIR BAG”.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.

• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

FOR USA AND CANADA : Precaution for Trouble Diagnosis

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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.

FOR USA AND CANADA : Precaution for Harness Repair

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AV COMMUNICATION SYSTEM

• Solder the repaired parts, and wrap with tape. [Frays of twisted line

must be within 110 mm (4.33 in).]

PKIA0306E

AV-38

< PRECAUTION >

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PRECAUTIONS

• 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.)

FOR MEXICO

FOR MEXICO : Precaution for Supplemental Restraint System (SRS) "AIR BAG" and 
"SEAT BELT PRE-TENSIONER"

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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 AIR BAG” 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 AIR BAG”.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.

• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

FOR MEXICO : Precaution for Trouble Diagnosis

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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.

FOR MEXICO : Precaution for Harness Repair

INFOID:0000000005589987

AV COMMUNICATION SYSTEM

PKIA0307E