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Nissan March K13. Manual - part 5

POWER SUPPLY AND GROUND CIRCUIT

AV-13

< DTC/CIRCUIT DIAGNOSIS >

[AUDIO SYSTEM]

DTC/CIRCUIT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

AUDIO UNIT

AUDIO UNIT : Diagnosis Procedure

INFOID:0000000005921602

CHECK FUSE

Check for blown fuses.

Is inspection result normal?

YES

>> GO TO 2.

>> Be sure to eliminate cause of malfunction before installing new fuse.

CHECK POWER SUPPLY CIRCUIT

Check voltage between audio unit harness connectors and ground.

Is inspection result normal?

YES

>> INSPECTION END

>> Check harness between audio unit and fuse.

Power source

Fuse No.

Battery

Ignition switch ACC or ON

Signal name

(+)

(-)

Ignition switch position

Voltage

(Approx.)

Audio unit

Connector

Terminal

Battery power supply

M46

Ground

OFF

Battery voltage

ACC power supply

ACC

AV-14

< SYMPTOM DIAGNOSIS >

[AUDIO SYSTEM]

AUDIO SYSTEM SYMPTOMS

SYMPTOM DIAGNOSIS

AUDIO SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000005911634

AUDIO SYSTEM

Symptoms

Check items

Possible malfunction location / Action to take

Audio sound is not heard.

No sound from all speakers.

• Audio unit power supply and ground circuit.

Refer to

AV-13, "AUDIO UNIT : Diagnosis Procedure"

Sound is not heard only from the
specific places.

Sound signal circuit of malfunctioning system.

AM/FM radio is not received.

Other audio sounds are normal.

Antenna feeder

NORMAL OPERATING CONDITION

AV-15

< SYMPTOM DIAGNOSIS >

[AUDIO SYSTEM]

NORMAL OPERATING CONDITION

Description

INFOID:0000000005911636

RELATED TO AUDIO

• The majority of the audio malfunctions are the result of outside causes (bad CD, electromagnetic interfer-

ence, etc.). Check the symptoms below to diagnose the malfunction.

• The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.

Check that noise is caused and/or changed by engine speed, ignition switch turned to each position, and
operation of each piece of electrical equipment. Then determine the cause.

NOTE:
• CD-R is not guaranteed to play because they can contain compressed audio (MP3, WMA) or could be incor-

rectly mastered by the customer on a computer.

• Check that the CDs carry the Compact Disc Logo. If not, the disc is not mastered to the red book Compact

Disc Standard and may not play.

Noise resulting from variations in field strength, such as fading noise and multi-path noise, or external noise from trains and other
sources, is not a malfunction.

NOTE:

• Fading noise: This noise occurs because of variations in the field strength in a narrow range due to mountains or buildings blocking

the signal.

• Multi-path noise: This noise results from a time difference between the broadcast waves directly from the station arriving at the

antenna and the waves reflected by mountains or buildings.

Symptoms

Cause and Counter measure

Cannot play

Check that the disc was inserted correctly.

Check that the disc is scratched or dirty.

Check if there is condensation inside the player. If there is, wait until the condensation is gone
(about 1 hour) before using the player.

If there is a temperature increase error, the CD player will play correctly after it returns to the nor-
mal temperature.

Files with extensions other than “.MP3”, “.WMA”, “.M4A”, “.mp3”, “.wma”, “.m4a”cannot be played.
In addition, the character codes and number of characters for folder names and file names should
be in compliance with the specifications.

If there is mixture of music CD files (CD-DA data) and MP3/WMA/AAC files on a CD, only the mu-
sic CD files (CD-DA) will be played.

Check if the disc or the file is generated in an irregular format. This may occur depending on the
variation or the setting of MP3/WMA writing applications or other text editing applications.

Check if the finalization process, such as session close and disc close, is done for the disc.

Check if the disc is protected by copyright.

Poor sound quality

Check if the disc is scratched or dirty.

Bit rate may be too low.

It takes a relatively long time before
the music starts playing.

If there are many folder or file levels on the MP3/WMA CD, or if it is a multisession disc, some
time may be required before the music starts playing.

Music cuts off or skips

The writing software and hardware combination might not match, or the writing speed, writing
depth, writing width, etc., might not match the specifications. Try using the slowest writing speed.

Skipping with high bit rate files

Skipping may occur with large quantities of data, such as for high bit rate data.

Move immediately to the next song
when playing.

When a non-MP3/WMA file has been given an extension of “.MP3”, “.WMA”, “.mp3” or “.wma”, or
when play is prohibited by copyright protection, there will be approximately 5 seconds of no sound
and then the player will skip to the next song.

The songs do not play back in the
desired order.

The playback order is the order in which the files were written by the writing software. Therefore,
the files might not play in the desired order.

AV-16

< REMOVAL AND INSTALLATION >

[AUDIO SYSTEM]

AUDIO UNIT

REMOVAL AND INSTALLATION

AUDIO UNIT

Removal and Installation

INFOID:0000000005911642

REMOVAL

Remove the cluster lid C. Refer to

IP-13, "Removal and Installation"

Remove the screws and disconnect the connector to remove the audio unit.

Remove the bracket screws to remove the audio unit.

INSTALLATION

Install in the reverse order of removal.

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