Nissan Sentra. Manual - part 21

AV-76

< SYSTEM DESCRIPTION >

[DISPLAY AUDIO WITHOUT BOSE]

SYSTEM

will then become active. Bluetooth

®

 telephone functions can be turned off using the Nissan Voice Recognition

system.

Steering Switches

When buttons on the steering switches are pushed, the resistance in steering wheel audio control switch cir-
cuit changes, depending on which button is pushed. The Bluetooth

®

 control unit uses this signal to perform

various functions while navigating through the voice recognition system.

The following functions can be performed using the steering switches:
• Initiate self-diagnosis of the Bluetooth

®

 telephone system

• Start a voice recognition session

• Answer and end telephone calls

• Adjust the volume of calls

Microphone

The microphone is located in the roof console assembly. The microphone sends a signal to the Bluetooth

®

control unit. The microphone can be actively tested during self-diagnosis.

Audio Unit

The audio unit receives signals from the Bluetooth

®

 control unit and sends audio signals to the speakers.

SPEED SENSITIVE VOLUME SYSTEM

Volume level of this system goes up and down automatically in proportion to the vehicle speed. The control

level can be selected by the customer. Refer to Owner's Manual for operating instructions.

AV

DIAGNOSIS SYSTEM (AUDIO UNIT)

AV-77

< SYSTEM DESCRIPTION >

[DISPLAY AUDIO WITHOUT BOSE]

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DIAGNOSIS SYSTEM (AUDIO UNIT)

Description

INFOID:0000000009758843

The audio unit on board diagnosis performs the functions listed in the table below:

On Board Diagnosis Function

INFOID:0000000009758844

METHOD OF STARTING

1. Turn the ignition ON.

2. Turn the audio system OFF.

3. While pressing the preset 1 button, turn the volume control dial

clockwise or counterclockwise for 40 clicks or more. Shifting

from current screen to previous screen is performed by pressing

BACK button.

4. The trouble diagnosis initial screen is displayed, and Self Diag-

nosis or Confirmation/Adjustment can be selected.

SELF DIAGNOSIS MODE

Audio Unit Self Diagnosis

1. Select Self Diagnosis.

Mode

Description

Self Diagnosis

• Audio unit diagnosis.
• Diagnoses the connections across system components.

Confirmation/

Adjustment

Display Diagnosis

The following check functions are available: color tone check by color bar 
display and white display, light and shade check by gray scale display.

Vehicle Signals

Diagnosis of signals can be performed for vehicle speed, lights, reverse, 
EQ pin, destination and camera type.

Speaker Test

The connection of a speaker can be confirmed by test tone.

Error History

The system malfunction and the frequency when occurring in the past are 
displayed. When the malfunctioning item is selected, the time and place 
that the selected malfunction last occurred are displayed.

Camera System

Displayed but not used.

AV COMM Diagnosis

The communication condition of each unit of display audio system can be 
monitored.

Delete Unit Connection Log

Erase the connection history of unit and error history.

Initialize Setting

Initializes the audio unit memory.

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AV-78

< SYSTEM DESCRIPTION >

[DISPLAY AUDIO WITHOUT BOSE]

DIAGNOSIS SYSTEM (AUDIO UNIT)

2. Self diagnosis screen is displayed. The bar graph visible in center of screen indicates progress of self

diagnosis.

3. Diagnosis results are displayed after the self diagnosis is com-

pleted. The unit names and the connection lines are color coded

according to the diagnostic results.

1: Control unit (audio unit) is displayed in red.
• Replace audio unit if Self Diagnosis did not run because control unit malfunction is indicated. The symptom is audio unit internal

error. Refer to 

AV-122, "Removal and Installation"

.

• If multiple errors occur at the same time for a single unit, the screen switch colors are determined according to the following order

of priority: red > gray.

4. Comments of self diagnosis results can be viewed in the diagno-

sis result screen.

Audio Unit Self Diagnosis Results

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Diagnosis results

Unit

Connection line

Normal

Green

Green

Connection malfunction

Gray

Yellow

Unit malfunction 

1

Red

Green

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Only Unit Part Is Displayed In Red

Screen switch

Description

Possible cause

Control unit

Malfunction is detected in audio unit power 
supply and ground circuits.

• Audio unit power supply or ground cir-

cuits.
Refer to 

AV-101, "AUDIO UNIT : Diagno-

sis Procedure"

.

• If no malfunction is detected in audio unit 

power supply and ground circuits, re-
place audio unit. Refer to 

AV-122, "Re-

moval and Installation"

.

AV

DIAGNOSIS SYSTEM (AUDIO UNIT)

AV-79

< SYSTEM DESCRIPTION >

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Audio Unit Confirmation/Adjustment

1. Select Confirmation/Adjustment.

2. Select each switch on the Confirmation/Adjustment screen to

display the relevant trouble diagnosis screen. Press the BACK

switch to return to the initial Confirmation/Adjustment screen.

Display Diagnosis

Vehicle Signals

A Connecting Cable Between Units Is Displayed In Yellow

Area with yellow connection lines

Description

Possible cause

Control unit 

⇔ BT HF Unit

When one of the following is detected:
• malfunction is detected in Bluetooth

®

 

control unit power supply and ground cir-
cuits.

• malfunction is detected in AV communi-

cation circuits between audio unit and 
Bluetooth

®

 control unit.

• Bluetooth

®

 control unit power supply or 

ground circuits.
Refer to 

AV-101, "BLUETOOTH® CON-

TROL UNIT : Diagnosis Procedure"

.

• AV communication circuits between au-

dio unit and Bluetooth

®

 control unit.

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