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Nissan Xterra. Manual - part 17

AV-60

< SYSTEM DESCRIPTION >

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SYSTEM

Bluetooth

Control Unit

When the ignition switch is turned to ACC or ON, the Bluetooth

control unit will power up. During power up,

the Bluetooth

control unit is initialized and performs various self-checks. Initialization may take up to 20 sec-

onds. If a phone is present in the vehicle and paired with the Bluetooth

control unit, Nissan Voice Recognition

will then become active. Bluetooth

telephone functions can be turned off using the Nissan Voice Recognition

system.

Steering Wheel Audio Control Switches

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

control unit uses this sig-

nal to perform various functions while navigating through the voice recognition system.

The following functions can be performed using the steering wheel audio control switch:
• 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.

USB CONNECTION FUNCTION

• iPod

or music files in USB memory can be played.

• Sound signals are transmitted from USB connector and AUX jack to the audio unit and output to each

speaker and tweeter.

• iPod

is recharged when connected to USB connector and AUX jack.

NOTE:
Use the enclosed USB harness when connecting iPod

to USB connector and AUX jack.

iPod

is a trademark of Apple inc., registered in the U.S. and other countries.

DIAGNOSIS SYSTEM (AUDIO UNIT)

AV-61

< SYSTEM DESCRIPTION >

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DIAGNOSIS SYSTEM (AUDIO UNIT)

Description

INFOID:0000000009485177

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

On Board Diagnosis Function

INFOID:0000000009485178

SELF DIAGNOSIS MODE

Audio Unit Self Diagnosis

1. Select Self Diagnosis.

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-108, "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.

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.

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.

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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Diagnosis results

Unit

Connection line

Normal

Green

Connection malfunction

Gray

Yellow

Unit malfunction

Red

Green

AV-62

< SYSTEM DESCRIPTION >

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DIAGNOSIS SYSTEM (AUDIO UNIT)

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

sis result screen.

Audio Unit Self Diagnosis Results

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.

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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-86, "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-108, "Re-

moval and Installation"

A Connecting Cable Between Units Is Displayed In Yellow

Area with yellow connection lines

Description

Possible cause

Control unit

⇔ BTHF

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-86, "BLUETOOTH® CON-

TROL UNIT : Diagnosis Procedure"

• AV communication circuits between au-

dio unit and Bluetooth

control unit.

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DIAGNOSIS SYSTEM (AUDIO UNIT)

AV-63

< SYSTEM DESCRIPTION >

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Display Diagnosis

Vehicle Signals

A comparison check can be made of each actual vehicle signal and

the signals recognized by the system.

Speaker Test

Select Speaker Test to display the Speaker Diagnosis screen. Press

Start to generate a test tone in a speaker. Press Start again to gener-

ate a test tone in the next speaker. Press End to stop the test tones.

Error History

The self diagnosis results are judged depending on whether any error occurs from when Self Diagnosis is

selected until the self diagnosis results are displayed.

However, the diagnosis results are judged normal if an error has occurred before the ignition switch is turned

ON and then no error has occurred until the self diagnosis start. Check the Error Record to detect any error

that may have occurred before the self diagnosis start because of this situation.

The frequency of occurrence is displayed in a count up manner. The actual count up method differs depending

on the error item.

Count up method A

• The counter is set to 40 if an error occurs. 1 is subtracted from the counter if the condition is normal at a next

ignition ON cycle.

• The counter lower limit is 1. The counter can be reset (no error record display) with the Delete log switch.

Count up method B

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