Infiniti Q45. Manual - part 153

AUDIO

AV-41

Each diagnosis is shown by selecting each screen switch on
CONFIRMATION/ADJUSTMENT screen.

When selecting "Speaker Test", speaker diagnosis screen is dis-
played. When pressing "Start/Next", test tone emits from the
speaker. At that time, when pressing "Start/Next", test tone emits
from next speaker. Then, when pressing the "Stop", test tone
stops.

NOTE:
The frequency of test tone emitted from each speaker is as fol-
lows.

SKIA0361E

Instrument speaker

: 1 kHz

Door speaker

: 1 kHz

Woofer

: 100 Hz

SKIA3669E

AV-42

AUDIO

Trouble Diagnosis

NKS001I1

●

The majority of the audio malfunctions are the result of outside causes (bad CD/cassette, electromagnetic
interference, 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 malfunction-
ing. Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and
operation of each piece of electrical equipment, and then determine the cause.

●

Make sure that other operation except audio system can be performed with multifunction switch. If these
operations are inoperative with multifunction switch, refer to

DI-148, "Multifunction Switch Does Not Oper-

ate"

(Without navigation system), or

DI-169, "Multifunction Switch Does Not Operate"

(With navigation

system) to repair malfunctioning parts.

●

Refer to "SERVICE BULLETIN ITB04-055" for the diagnosis of satellite radio.

Symptom

Possible malfunction location

Audio system does not work properly.

●

Audio unit power supply circuit
Refer to

AV-44, "Power Supply Circuit Inspection"

●

BOSE speaker amp. power supply and ground circuit
Refer to

AV-44, "Power Supply Circuit Inspection"

●

Communication signal circuit between audio unit and BOSE speaker
amp. Refer to

AV-40, "Self Diagnosis Mode"

●

Audio unit

●

BOSE speaker amp.

CD auto changer does not work properly.

●

CD auto changer power supply and ground circuit
Refer to

AV-44, "Power Supply Circuit Inspection"

●

Communication signal circuit between audio unit and CD auto changer
Refer to

AV-40, "Self Diagnosis Mode"

●

CD auto changer

●

Audio unit

No sound can be heard from all speakers.

With voice activated control system and hands-free
phone system

●

TEL ON signal circuit between TEL adapter unit and voice activated con-
trol module

●

TEL ON signal circuit between voice activated control module and audio
unit

●

Audio unit

●

BOSE speaker amp.

●

Voice activated control module

●

TEL adapter unit

With voice activated control system

●

Mute signal circuit between voice activated control module and audio
unit

●

Audio unit

●

BOSE speaker amp.

●

Voice activated control module

With hands-free phone system

●

TEL ON signal circuit between TEL adapter unit and audio unit

●

Audio unit

●

BOSE speaker amp.

●

TEL adapter unit

Without voice activated control system and hands-free
phone system

●

Audio unit

●

BOSE speaker amp.

AUDIO

AV-43

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 a time difference between the broadcast waves directly from the
station arriving at the antenna and the waves reflected by mountains or buildings.

No sound can be heard from one or several speakers.

●

Audio signal circuit between audio unit and BOSE speaker amp.

●

Audio signal circuit between BOSE speaker amp. and speaker

●

Speaker

●

Woofer

●

Audio unit

●

BOSE speaker amp.

Only the sound from CD auto changer cannot play from
one or several speakers.

●

Audio signal circuit between CD auto changer and audio unit

●

CD auto changer

●

Audio unit

No sound can be heard from radio or noise is caught.

●

Antenna amp. ON signal circuit

●

Antenna feeder

●

Antenna

●

Antenna amp.

●

Audio unit

Symptom

Possible malfunction location

AV-44

AUDIO

Power Supply Circuit Inspection

NKS001I3

CHECK FUSE

Make sure that the following fuses and fusible link of the audio unit, BOSE speaker amp. and CD auto changer
are not blown.

OK or NG

>> GO TO 2.

>> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse

or fusible link. Refer to

PG-2, "POWER SUPPLY ROUTING"

CHECK POWER SUPPLY CIRCUIT

Check voltage between the following harness connector terminals
and ground.

OK or NG

>> GO TO 3.

>> Repair harness or connector.

Unit

Signal name

Fuse and fusible link No.

Audio unit

Battery power supply

ACC power supply

BOSE speaker amp.

Battery power supply

ACC power supply

CD auto changer

Battery power supply

ACC power supply

Unit

Terminals

OFF

ACC

(+)

(–)

Connector

Terminal

Audio
unit

M86

Ground

Battery
voltage

0 V

Battery
voltage

BOSE
speaker
amp.

B233

Battery
voltage

B234

0 V

Battery
voltage

CD auto
changer

M109

Battery
voltage

0 V

Battery
voltage

SKIB0478E

Content .. 151 152 153 154 ..