Infiniti M45 (Y34). Manual — part 172

AUDIO

AV-21

C

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A

B

AV

58 (R)

Ground

Communica-
tion signal
(CHG REQ)

Input

ON

Insert/eject
magazine.

CD auto changer
operation is not
possible.

59 (W)

Ground

Communica-
tion signal
(CHG-H/U)

Input

ON

Insert/eject
magazine.

CD auto changer
operation is not
possible.

60 (B)

Ground

Communica-
tion signal
(H/U-CHG)

Output

ON

Press the CD
switch.

CD auto changer
operation is not
possible.

71 (R/L)

Ground

Illumination
signal

Input

OFF

Lighting switch
is ON (1st posi-
tion).

Battery voltage

Audio unit illumi-
nation does not
come on when
lighting switch is
ON (1st position).

Turn lighting
switch OFF.

Approx. 0V

72 (L/B)

Ground

ACC power

Input

ACC

-

Battery voltage

Audio unit opera-
tion is not possi-
ble.

73 (SB)

Ground

Battery power

Input

OFF

-

Battery voltage

Cassette tape
player operation is
not possible.

75 (P/L)

Ground

Radio
antenna amp.
ON signal

Output

ON

-

Approx.10V or more

Receiving status
of radio broadcast
becomes bad.

76 (SB)

Ground

Illumination
control signal

Input

ON

Illumination con-
trol switch is
operated by
lighting switch in
1st position.

Changes between approx. 0 and

approx. 12V.

Audio unit illumi-
nation cannot be
controlled.

78

-

Shield
(Audio sound
signal)

-

-

-

-

-

Terminal No.

Item

Signal

input/

output

Condition

Voltage

Example of symp-

tom

+

-

Ignition

switch

Operation

SKIA0196E

SKIA0197E

SKIA0198E

AV-22

AUDIO

Terminals and Reference Value for CD Auto Changer

AKS002NO

80 (BR)

79 (Y)

Audio sound
signal (LH)

Output

ON

Play cassette
tape.

Audio sound is not
heard from
speaker LH.

82 (B)

81 (W)

Audio sound
signal (RH)

Output

ON

Play cassette
tape.

Audio sound is not
heard from
speaker RH.

Terminal No.

Item

Signal

input/

output

Condition

Voltage

Example of symp-

tom

+

-

Ignition

switch

Operation

SKIA0195E

SKIA0195E

Terminal No.

Signal

name

Signal

input/

output

Condition

Voltage

Example of symptom

+

-

Ignition

switch

Operation

2 (L)

1 (P)

CD sound
signal (LH)

Output

ON

Play CD.

CD sound is not
heard from speaker
LH.

4 (LG)

3 (PU)

CD sound
signal (RH)

Output

ON

Play CD.

CD sound is not
heard from speaker
RH.

6

-

Shield
(CD sound
signal)

-

-

-

-

-

8 (R)

Ground

Communi-
cation sig-
nal (REQ)

Output

ON

Insert/eject maga-
zine.

CD auto changer
operation is not pos-
sible.

9 (W)

Ground

Communi-
cation sig-
nal (TXD)

Output

ON

Insert/eject maga-
zine.

CD auto changer
operation is not pos-
sible.

SKIA0195E

SKIA0195E

SKIA0196E

SKIA0197E

AUDIO

AV-23

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AV

Self-Diagnosis Function

AKS002NQ

DESCRIPTION

●

Diagnosis function consists of the self-diagnosis mode, and the “CONFIRMATION/ADJUSTMENT” mode.

●

Self-diagnosis mode checks for connection among audio unit, and CD auto changer and analyzes each
unit, then displays the results.

DIAGNOSIS ITEM

Self-Diagnosis Mode

AKS002NR

OPERATION PROCEDURE

●

To start the self-diagnosis mode and to check the diagnosis result, refer to

AV-69, "Self-Diagnosis Mode"

for models with navigation system, and

DI-113, "Self-Diagnosis Mode"

for vehicles without navigation

system.

Trouble Diagnosis

AKS002NT

●

The majority of the audio troubles are the result of outside causes (bad CD/cassette, electromagnetic
interference, etc.). Check the inspection items below to diagnose the malfunction.

10 (B)

Ground

Communi-
cation sig-
nal (RXD)

Input

ON

Press the CD
switch.

CD auto changer
operation is not pos-
sible.

12 (SB)

Ground

Battery
power

Input

OFF

-

Battery voltage

CD auto changer
operation is not pos-
sible.

13 (SB)

Ground

Illmination
signal (-)

Input

OFF

Illmination control
switch is oper-
ated by lighting
switch in 1st posi-
tion.

Changes between approx. 0V
and approx. 12V.

CD auto chager illmi-
nation does not come
on when lighting
switch is ON (1st
position).

14

(R/L)

Ground

Illmination
signal (+)

Input

OFF

Lighting switch
ON (1st position).

Approx.12V

CD auto changer illu-
mination cannot be
controlled.

Lighting switch
OFF.

Approx.0V

15 (B)

Ground

Ground

-

ON

-

Approx. 0V

-

16

(L/OR)

Ground

ACC power

Input

ACC

-

Battery voltage

CD auto changer
operation is not pos-
sible.

Terminal No.

Signal

name

Signal

input/

output

Condition

Voltage

Example of symptom

+

-

Ignition

switch

Operation

SKIA0198E

Mode

Description

Self-diagnosis

●

Check connection among AV and NAVI control unit or AV control unit and audio unit and
CD auto changer.

●

Perform the unit diagnosis of audio unit and CD auto changer.

AV-24

AUDIO

MALFUNCTION WITH RADIO, TAPE AND CD

FOR RADIO ONLY

NOTE:
1.

The cause is a reduction in the receiving sensitivity of the window antenna.

2.

This is noise resulting from variations in field strength, such as fading noise and multi-path noise, or exter-
nal 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 which reflect off of mountains or buildings.

Symptom

Check items

Possible cause

Inoperative

●

Make sure the ignition switch is in the ACC position.

●

Audio unit

●

Audio unit power supply circuit.Refer
to

AV-26, "Power Supply Circuit

Inspection"

No sound

●

Make sure the volume is not turned down.

●

Make sure the balance and fader control knobs are
centered.

●

Audio unit

●

Audio unit power supply circuit.Refer
to

AV-26, "Power Supply Circuit

Inspection"

●

Speaker

●

Sound signal circuit between speaker
and audio unit

Poor sound

●

Make sure the bass and treble adjustment knobs are
centered.

●

audio unit

●

CD auto changer

●

Speaker

●

BOSE speaker amp.

Noisy

-

●

Audio unit

●

CD auto changer

●

Each electrical equipment

●

BOSE speaker amp.

Symptom

Check items

Possible cause

No sound

●

Make sure the radio is tuned to a station's frequency.

●

Audio unit

●

Antenna feeder

●

Antenna amplifier

●

Glass antenna

Noisy

●

Make sure the radio is tuned to a station's frequency.

●

Make sure the signal of the received station is not
weak.

●

Make sure no mirror-type window film nor any metal
object (after-market antenna, etc.) is attached on the
rear window glass (Note 1).

●

Check whether or not the malfunction occurs only in
a particular area. (Note 2)

●

Audio unit

●

Antenna feeder

●

Antenna amplifier

●

window antenna

●

Noise prevention parts

●

Each electrical equipment

●

Wire harness of each piece of electri-
cal equipment

Selected radio stations stored in
memory are deleted

-

●

Audio unit

●

Audio unit power supply circuit.Refer
to

AV-26, "Power Supply Circuit

Inspection"