Nissan Murano Z50 (2006 year). Manual - part 14

AUDIO

AV-37

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2006 Murano

Terminals and Reference Value for A/C and AV Switch

NKS0021R

Terminal

(Wire color)

Item

Signal 

input/

output

Condition

Reference value

+

–

Ignition 

switch

Operation

1 (Y)

Ground

Battery power supply

Input

OFF

—

Battery voltage

2 (P/B)

Ground

ACC power supply

Input

ACC

—

Battery voltage

3 (R/L)

Ground

Illumination signal

Input

ON

Lighting switch ON

Approx. 12 V

Lighting switch OFF

Approx. 0 V

4 (R/W)

Ground

Illumination  control 
signal

Input

ON

Illumination control switch is 
operated by lighting switch 
in ON position

Changes between approx. 0 and 
approx. 12 V

5 (B)

Ground

Ground

—

ON

—

Approx. 0 V

6 (L/G)

Ground

Communication
signal (+)

Input/

Output

ON

—

7

—

Shield

—

—

—

—

8 (L/R)

Ground

Communication
signal (–)

Input/

Output

ON

—

12 (R)

Ground

Remote control A

Input

ON

Press and hold MODE 
switch

Approx. 0 V

Press and hold SEEK UP 
switch

Approx. 1.7 V

Press and hold VOL UP 
switch

Approx. 3.3 V

Except for above

Approx. 5 V

13 (G)

Ground

Remote control B

Input

ON

Press and hold POWER 
switch

Approx. 0 V

Press and hold SEEK 
DOWN switch

Approx. 1.7 V

Press and hold VOL DOWN 
switch

Approx. 3.3 V

Except for above

Approx. 5 V

14 (B/W)

Ground

Remote control 
ground

—

ON

—

Approx. 0 V

SKIB7378E

SKIB7379E

AV-38

AUDIO

Revision: 2006 August

2006 Murano

Terminals and Reference Value for Satellite Radio Tuner

NKS002Q6

Terminal

(Wire color)

Item

Signal 

input/

output

Condition

Reference value

+

–

Ignition 

switch

Operation

12 (R)

11 (G)

Satellite radio audio 
signal LH

Output

ON

Receive satellite radio audio 
signal

14 (B)

13 (W)

Satellite radio audio 
signal RH

Output

ON

Receive satellite radio audio 
signal

15

—

Shield

—

—

—

—

16

—

Shield

—

—

—

—

18 (L)

Ground

Communication signal
REQ (SAT-AUDIO)

Output

ON

When setting to satellite 
radio mode

19 (P)

Ground

Communication signal
Tx (SAT-AUDIO)

Output

ON

When setting to satellite 
radio mode

20 (L)

Ground

Communication signal
Rx (AUDIO-SAT)

Input

ON

When setting to satellite 
radio mode

22 (Y)

Ground

Battery power supply

Input

OFF

—

Battery voltage

26 (LG)

Ground

ACC power supply

Input

ACC

—

Battery voltage

27

—

Satellite radio antenna

—

—

—

—

SKIB3609E

SKIB3609E

SKIB7338E

SKIB7337E

SKIB7336E

AUDIO

AV-39

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A/C and AV Switch Self-Diagnosis Function

NKS0021S

Performing self-diagnosis makes it possible to check operation of A/C and AV switch indicator (LED) and other
switch.

STARTING THE SELF-DIAGNOSIS MODE

1.

Turn ignition switch from OFF to ACC.

2.

Within 10 seconds press and hold the switches “1” and “6”
simultaneously for 3 seconds.

DIAGNOSIS FUNCTION 

The following are checked:

●

All the indicators (LED) in the A/C and AV switch.

●

Continuity of the switches by sounding the buzzer when the A/C and AV switch and audio steering switch
is pressed.

●

Continuity of harness between A/C and AV switch and audio steering switch.

NOTE:
Impossible to check rear window defogger switch operation (No beep sound even under normal status).

EXITING THE SELF-DIAGNOSIS MODE

●

Turn ignition switch OFF.

SKIB7704E

AV-40

AUDIO

Revision: 2006 August

2006 Murano

Trouble Diagnosis

NKS002LS

●

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 A/C and AV switch. If these
operations are inoperative with A/C and AV switch, refer to 

AV-107, "Unable to Operate System with A/C

and AV Switch"

  (Without navigation system), or 

AV-179, "Unable to Operate System with A/C and AV

Switch"

  (With navigation system).

●

Refer to "SERVICE BULLETIN NTB04-119" for the diagnosis of satellite radio.

Symptom

Possible malfunction location

Audio system does not work properly.

●

Audio unit power supply circuit

●

Communication signal circuit between audio unit and display control unit

●

A/C and AV switch

●

Audio unit

No sound can be heard from all speakers.

Base system

●

Audio unit

BOSE system

●

BOSE speaker amp. power supply and ground circuit

●

BOSE speaker amp. ON signal circuit

●

Audio unit

●

BOSE speaker amp.

No sound can be heard from one or several speakers.

Base system

●

Audio signal circuit between audio unit and speaker

●

Speaker

●

Tweeter

●

Audio unit

BOSE system

●

Audio signal circuit between audio unit and BOSE speaker amp.

●

Audio signal circuit between BOSE speaker amp. and speaker

●

Speaker

●

Tweeter

●

Audio unit

●

BOSE speaker amp.

No sound can be heard from woofer.

●

Audio signal circuit between BOSE speaker amp. and woofer

●

Woofer

●

BOSE speaker amp.

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

●

Antenna amp. ON signal circuit

●

Antenna feeder

●

Roof antenna

●

Antenna amp.

●

Audio unit

Audio steering switch does not operate properly.

●

Remote control signal circuit between audio steering switch and A/C and 
AV switch

●

Audio steering switch

●

Spiral cable

●

A/C and AV switch

AUDIO

AV-41

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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.

AV-42

AUDIO

Revision: 2006 August

2006 Murano

Inspection of Power Supply Circuit

NKS0021V

1. 

CHECK FUSE

Make sure that the following fuses of the audio unit and BOSE speaker amp. are not blown.

OK or NG

OK

>> GO TO 2.

NG

>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to 

PG-

3, "POWER SUPPLY ROUTING CIRCUIT"

 .

2. 

CHECK POWER SUPPLY CIRCUIT

1.

Check voltage between audio unit harness connector terminals
and ground.

2.

Check voltage between BOSE speaker amp. harness connector
terminal and ground.

OK or NG

OK

>>

●

INSPECTION END (Base system)

●

GO TO 3 (BOSE system).

NG

>> Repair harness or connector.

3. 

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BOSE speaker amp. connector.

3.

Check continuity between BOSE speaker amp. harness connec-
tor B114 terminal 17 and ground.

OK or NG

OK

>> INSPECTION END

NG

>> Repair harness or connector.

Unit

Signal

Fuse No.

Audio unit

Battery power supply

38

Ignition switch ACC or ON

6

BOSE speaker amp.

Battery power supply

38

Terminals

OFF

ACC

ON

(+)

(–)

Connector

Terminal

M44

6

Ground

Battery 
voltage

Battery 
voltage

Battery 
voltage

10

Ground

0 V

Battery 
voltage

Battery 
voltage

Terminals

OFF

ACC

ON

(+)

(–)

Connector

Terminal

B114

1

Ground

Battery 
voltage

Battery 
voltage

Battery 
voltage

SKIA8743E

SKIA9395E

17 – Ground

: Continuity should exist.

SKIA4312E

AUDIO

AV-43

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Inspection of Audio Steering Switch

NKS0021X

1. 

CHECK A/C AND AV SWITCH SELF-DIAGNOSIS FUNCTION

1.

Start A/C and AV switch self-diagnosis function. Refer to 

AV-39, "A/C and AV Switch Self-Diagnosis Func-

tion"

 .

2.

Operate audio steering switch.

Does audio steering switch operate normally?

YES

>> INSPECTION END

NO

>> GO TO 2.

2. 

CHECK AUDIO STEERING SWITCH RESISTANCE

1.

Turn ignition switch OFF.

2.

Disconnect combination switch (spiral cable) connector.

3.

Check resistance audio steering switch harness connector ter-
minals.

OK or NG

OK

>> GO TO 3.

NG

>> Replace audio steering switch.

3. 

CHECK SPIRAL CABLE

1.

Disconnect spiral cable connector.

2.

Check continuity between combination switch (spiral cable) ter-
minals.

OK or NG

OK

>> GO TO 4.

NG

>> Replace spiral cable.

Terminal

Signal name

Condition

Resistance 

(

Ω

)

16

17

Seek down

Press and hold SEEK DOWN switch

Approx. 165

Power

Press and hold POWER switch

Approx. 0

Volume (down)

Press and hold VOL DOWN switch

Approx. 652

20

Seek up

Press and hold SEEK UP switch

Approx. 165

Mode

Press and hold MODE switch

Approx. 0

Volume (up)

Press and hold VOL UP switch

Approx. 652

SKIA9400E

24 – 20

: Continuity should exist.

31 – 17

: Continuity should exist.

32 – 16

: Continuity should exist.

SKIB0521E

AV-44

AUDIO

Revision: 2006 August

2006 Murano

4. 

CHECK HARNESS

1.

Disconnect A/C and AV switch connector.

2.

Check continuity between A/C and AV switch harness connector
M48 terminals 12, 13, 14 and combination switch (spiral cable)
harness connector M31 terminals 24, 32, 31.

3.

Check continuity between A/C and AV switch harness connector
M48 terminals 12, 13, 14 and ground.

OK or NG

OK

>> INSPECTION END

NG

>> Repair harness or connector.

12 – 24

: Continuity should exist.

13 – 32

: Continuity should exist.

14 – 31

: Continuity should exist.

12 – Ground

: Continuity should not exist.

13 – Ground

: Continuity should not exist.

14 – Ground

: Continuity should not exist.

SKIB0522E

AUDIO

AV-45

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Inspection of Front Door Speaker (Base System)

NKS0021Z

1. 

CHECK HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect audio unit and front door speaker connectors.

3.

Check continuity between audio unit harness connector termi-
nals and front door speaker harness connector terminals.

4.

Check continuity between audio unit harness connector termi-
nals and ground.

OK or NG

OK

>> GO TO  2.

NG

>> Repair harness or connector.

Terminals

Continuity

Audio unit 

Front door speaker 

Connector

Terminal

Connector

Terminal

M44

2

D5

1

Yes

1

2

4

D34

1

3

2

Terminals

Continuity

Audio unit

Ground

Connector

Terminal

M44

2

No

1

4

3

SKIA4273E

AV-46

AUDIO

Revision: 2006 August

2006 Murano

2. 

CHECK FRONT DOOR SPEAKER SIGNAL

1.

Connect audio unit and front door speaker connectors.

2.

Turn ignition switch ON.

3.

Press  “POWER” switch.

4.

Check voltage waveform between audio unit harness connector
terminals and ground with CONSULT-II or oscilloscope.

OK or NG

OK

>> INSPECTION END

NG

>> Replace audio unit.

Terminals

Condi-

tion

Reference value

(+)

(–)

Con-

nec-

tor

Termi-

nal

Con-

nec-

tor

Termi-

nal

M44

2

M44

1

Receive 
audio 
signal

4

3

SKIA9401E

SKIB3609E

AUDIO

AV-47

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Inspection of Rear Door Speaker (Base System)

NKS00220

1. 

CHECK HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect audio unit and rear door speaker connectors.

3.

Check continuity between audio unit harness connector termi-
nals and rear door speaker harness connector terminals.

4.

Check continuity between audio unit harness connector termi-
nals and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair harness or connector.

Terminals

Continuity

Audio unit 

Rear door speaker 

Connector

Terminal

Connector

Terminal

M45

13

D54

2

Yes

14

1

15

D74

2

16

1

Terminals

Continuity

Audio unit

Ground

Connector

Terminal

M45

13

No

14

15

16

SKIA4280E

AV-48

AUDIO

Revision: 2006 August

2006 Murano

2. 

CHECK REAR DOOR SPEAKER SIGNAL

1.

Connect audio unit and rear door speaker connectors.

2.

Turn ignition switch ON.

3.

Press  “POWER” switch.

4.

Check voltage waveform audio unit harness connector terminals
with CONSULT-II or oscilloscope.

OK or NG

OK

>> INSPECTION END

NG

>> Replace audio unit.

Terminals

Condi-

tion

Reference value

(+)

(–)

Con-

nector

Termi-

nal

Con-

nector

Termi-

nal

M45

14

M45

13

Receive 
audio 
signal

16

15

SKIA9402E

SKIB3609E

AUDIO

AV-49

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Inspection of Front Door Speaker (BOSE System)

NKS00221

1. 

CHECK HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect BOSE speaker amp. and front door speaker connectors.

3.

Check continuity between BOSE speaker amp. harness connec-
tor terminals and front door speaker harness connector termi-
nals.

4.

Check continuity between BOSE speaker amp. harness connec-
tor terminals and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair harness or connector.

Terminals

Continuity

BOSE speaker amp. 

Front door speaker 

Connector

Terminal

Connector

Terminal

B115

13

D4

1

Yes

14

2

15

D33

1

16

2

Terminals

Continuity

BOSE speaker amp.

Ground

Connector

Terminal

B115

13

No

14

15

16

SKIA4282E

AV-50

AUDIO

Revision: 2006 August

2006 Murano

2. 

CHECK FRONT DOOR SPEAKER SIGNAL

1.

Connect BOSE speaker amp. and front door speaker connectors.

2.

Turn ignition switch ON.

3.

Press  “POWER” switch.

4.

Check voltage waveform BOSE speaker amp. harness connec-
tor terminals with CONSULT-II or oscilloscope.

OK or NG

OK

>> Replace front door speaker.

NG

>> GO TO 3.

Terminals

Condi-

tion

Reference value

(+)

(–)

Con-

nector

Termi-

nal

Con-

nector

Termi-

nal

B115

13 

B115

14

Receive 
audio 
signal

15

16 

SKIA9403E

SKIB3609E

AUDIO

AV-51

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3. 

CHECK HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect audio unit and BOSE speaker amp. connectors.

3.

Check continuity between audio unit harness connector termi-
nals and BOSE speaker amp. harness connector terminals.

4.

Check continuity between audio unit harness connector termi-
nals and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair harness or connector.

Terminals

Continuity

Audio unit

BOSE speaker amp. 

Connector

Terminal

Connector

Terminal

M44

1

B115

29

Yes

2

30

3

27

4

28

Terminals

Continuity

Audio unit

Ground

Connector

Terminal

M44

1

No

2

3

4

SKIA4284E

AV-52

AUDIO

Revision: 2006 August

2006 Murano

4. 

CHECK FRONT DOOR SPEAKER SIGNAL

1.

Connect audio unit and BOSE speaker amp. connectors.

2.

Turn ignition switch ON.

3.

Press  “POWER” switch.

4.

Check voltage waveform audio unit harness connector terminals
with CONSULT-II or oscilloscope.

OK or NG

OK

>> INSPECTION END

NG

>> Replace audio unit.

Terminals

Condi-

tion

Reference value

(+)

(–)

Con-

nector

Termi-

nal

Con-

nector

Termi-

nal

M44

2

M44

1

Receive 
audio 
signal

4

3

SKIA9401E

SKIB3609E