Nissan Sentra. Manual - part 15

AV-52

< DTC/CIRCUIT DIAGNOSIS >

[BASE AUDIO]

STEERING SWITCH

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace steering switches. Refer to 

AV-62, "Removal and Installation"

.

2.

CHECK COMBINATION SWITCH (SPIRAL CABLE)

Check continuity between combination switch (spiral cable) connectors M79 and M80.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace combination switch (spiral cable). Refer to 

SR-16, "Removal and Installation"

.

3.

CHECK HARNESS BETWEEN COMBINATION SWITCH (SPIRAL CABLE) AND AUDIO UNIT 

1. Disconnect audio unit connector M43.

2. Check continuity between combination switch (spiral cable) connector M80 and audio unit connector M43.

3. Check continuity between combination switch (spiral cable) connector M80 and ground.

Is the inspection result normal?

YES

>> Replace audio unit. Refer to 

AV-58, "Removal and Installation"

.

NO

>> Repair or replace harness or connectors.

Combination switch (spiral cable) connector M79

Condition

Resistance 

Ω

(Approx.)

Terminal

Terminal

14

17

Depress SOURCE switch.

1

Depress  

switch.

121

Depress  

switch.

321

15

Depress  

switch.

1

Depress  

switch.

121

Combination switch (spiral cable) 

Continuity

Connector

Terminal

Connector

Terminal

M79

14

M80

24

Yes

15

31

17

33

Combination switch (spiral cable)

Audio unit 

Continuity

Connector

Terminal

Connector

Terminal

M80

24

M43

6

Yes

31

16

33

15

Combination switch (spiral cable)

Ground

Continuity

Connector

Terminal

M80

24

—

No

31

33

AV

AUDIO SYSTEM

AV-53

< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

AUDIO SYSTEM

Symptom Table

INFOID:0000000009758819

RELATED TO AUDIO

Symptoms

Check items

Probable malfunction location

The disk cannot be removed.

Audio unit

Malfunction in audio unit.
Refer to 

AV-58, "Removal and Installation"

.

No sound comes out or the level of the 
sound is low.

No sound from all speakers.

• Speaker circuit shorted to ground.

Refer to 

AV-25, "Wiring Diagram"

.

• Audio unit power supply and ground cir-

cuits malfunction.
Refer to 

AV-37, "AUDIO UNIT : Diagno-

sis Procedure"

.

Only a certain speaker (front door speaker 
LH, front door speaker RH, front tweeter 
LH, front tweeter RH, rear speaker LH, rear 
speaker RH) does not output sound.

• Poor connector connection of speaker.
• Sound signal circuit malfunction between 

audio unit and speaker.
Refer to:

-

AV-39, "Diagnosis Procedure"

 (front door 

speaker).

-

AV-41, "Diagnosis Procedure"

 (front 

tweeter).

-

AV-43, "Diagnosis Procedure"

 (rear 

speaker).

• Malfunction in speaker.

Refer to:

-

AV-60, "Removal and Installation"

 (front 

door speaker).

-

AV-59, "Removal and Installation"

 (front 

tweeter).

-

AV-61, "Removal and Installation"

 (rear 

speaker).

• Malfunction in audio unit.

Refer to 

AV-16, "On Board Diagnosis 

Function"

.

AV-54

< SYMPTOM DIAGNOSIS >

[BASE AUDIO]

AUDIO SYSTEM

RELATED TO HANDS-FREE PHONE

• Before performing diagnosis, confirm that the cellular phone being used by the customer is compatible with

the vehicle.

• It is possible that a malfunction is occurring due to a version change of the phone even though the phone is

a compatible type. This can be confirmed by changing the cellular phone to another compatible type, and

check that it operates normally. It is important to determine whether the cause of the malfunction is the vehi-

cle or the cellular phone.

Check Compatibility

1. Make sure the customer’s Bluetooth

®

 related concern is understood.

2. Verify the customer’s concern.

NOTE:

The customer’s phone may be required, depending upon their concern.

3. Write down the customer’s phone brand, model and service provider.

NOTE:

It is necessary to know the service provider. On occasion, a given phone may be on the approved list with

one provider, but may not be on the approved list with other providers.

4. Go to “www.nissanusa.com/bluetooth/”.
a. Using the website’s search engine, find out if the customer’s phone is on the approved list.
b. If the customer’s phone is NOT on the approved list:

Noise is mixed with audio.

Noise comes out from all speakers.

Malfunction in audio unit.
Refer to 

AV-16, "On Board Diagnosis Func-

tion"

.

Noise comes out only from a certain speak-
er (front door speaker LH, front door speak-
er RH, front tweeter LH, front tweeter RH, 
rear speaker LH, rear speaker RH).

• Poor connector connection of speaker.
• Sound signal circuit malfunction between 

audio unit and speaker.
Refer to:

-

AV-39, "Diagnosis Procedure"

 (front door 

speaker).

-

AV-41, "Diagnosis Procedure"

 (front 

tweeter).

-

AV-43, "Diagnosis Procedure"

 (rear 

speaker).

• Malfunction in speaker.
• Poor Installation of speaker (e.g. back-

lash and looseness).
Refer to:

-

AV-60, "Removal and Installation"

 (front 

door speaker).

-

AV-59, "Removal and Installation"

 (front 

tweeter).

-

AV-61, "Removal and Installation"

 (rear 

speaker).

• Malfunction in audio unit.

Refer to 

AV-16, "On Board Diagnosis 

Function"

.

Noise is mixed with radio only (when the ve-
hicle hits a bump or while driving over bad 
roads)

Poor connector connection of antenna or 
antenna feeder.
Refer to 

AV-63, "Location of Antenna"

.

No radio reception or poor reception.

• Other audio sounds are normal.
• Any radio station cannot be received or 

poor reception is caused even after mov-
ing to a service area with good reception 
(e.g. a place with clear view and no ob-
stacles generating external noises).

• Antenna amp. ON signal circuit malfunc-

tion.
Refer to 

AV-20, "Reference Value"

.

• Poor connector connection of antenna or 

antenna feeder.
Refer to 

AV-63, "Location of Antenna"

.

Buzz/rattle sound from speaker

The majority of buzz/rattle sounds are not 
indicative of an issue with the speaker, usu-
ally something nearby the speaker is caus-
ing the buzz/rattle.

Refer to "SQUEAK AND RATTLE TROU-
BLE DIAGNOSIS" in the appropriate interi-
or trim section.

Symptoms

Check items

Probable malfunction location

AV

AUDIO SYSTEM

AV-55

< SYMPTOM DIAGNOSIS >

[BASE AUDIO]

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Stop diagnosis here. The customer needs to obtain a Bluetooth

®

 phone that is on the approved list before

any further action.

c. If the feature related to the customer’s concern shows as “N” (not compatible):

Stop diagnosis here. If the customer still wants the feature to function, they will need to get an approved

phone showing the feature as “Y” (compatible) in the “Basic Features”.

d. If the feature related to the customer’s concern shows as “Y” (compatible):

Perform diagnosis as per the following table.

Symptoms

Check items

Probable malfunction location

Does not recognize cellular phone connec-
tion (no connection is displayed on the dis-
play at the guide).

Repeat the registration of cellular phone.

Malfunction in audio unit.
Replace audio unit. Refer to 

AV-58, "Re-

moval and Installation"

.

Hands-free phone cannot be established.

• Hands-free phone operation can be 

made, but the communication cannot be 
established.

• Hands-free phone operation can be per-

formed, however, voice between each 
other cannot be heard during the conver-
sation.

The other party’s voice cannot be heard by 
hands-free phone.

Check the “microphone speaker” in Inspec-
tion & Adjustment Mode if sound is heard.

Originating sound is not heard by the other 
party with hands-free phone communica-
tion.

Sound operation function is normal.

Sound operation function does not work.

Microphone signal circuit malfunction.
Refer to 

AV-48, "Diagnosis Procedure"

.

The system cannot be operated.

• The voice recognition can be controlled.

• Steering 

switch’s , , 

and 

 

switch works, but 

 does not work.

Steering switch malfunction.
Replace steering switch. Refer to 

AV-62, 

"Removal and Installation"

.

Steering switch’s

 

, 

, 

, and 

 switches do not work.

Steering switch signal circuit malfunction.
Refer to 

AV-50, "Diagnosis Procedure"

.

All steering switches do not work.

Steering switch ground circuit malfunction.
Refer to 

AV-50, "Diagnosis Procedure"

.