Nissan Pathfinder. Manual - part 59

AV

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-63

< SYSTEM DESCRIPTION >

[MID AUDIO WITHOUT BOSE]

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DIAGNOSIS SYSTEM (AV CONTROL UNIT)

Description

INFOID:0000000009174420

The AV control unit on board diagnosis includes the following functions:

• A/C and AV switch assembly self diagnosis that checks the ON/OFF operation (continuity) of each switch in

the A/C and AV switch assembly.

NOTE:

The hazard switch and disk eject switch are not included in this operation check.

• AV control unit on board diagnosis performs the following functions listed in the table below:

Perform CONSULT diagnosis if the AV control unit on board diagnosis does not start, the screen does not dis-

play anything, or the A/C and AV switch assembly self diagnosis does not function.

On Board Diagnosis Function

INFOID:0000000009174421

METHOD OF STARTING

A/C and AV Switch Assembly Self Diagnosis

• Press the BACK and UP switches within 10 seconds after turning

the ignition switch from OFF to ACC and hold them for 3 seconds

or more.

• The buzzer sounds, all indicators of the switches illuminate, and

the self-diagnosis mode begins.

• The ON position continuity of each switch can be checked by

pressing the switch. The buzzer sounds if continuity is present.

• The self diagnosis mode is canceled when the ignition switch is

turned OFF.

AV Control Unit Self Diagnosis

1. Turn the ignition ON.

2. Turn the audio system OFF.

Mode

Description

Self Diagnosis

• AV control unit diagnosis.
• Diagnoses the connections across system components (between AV 

control unit and each unit).

Confirmation/

Adjustment

Display Diagnosis

• Color tone check using color spectrum bar display and white display.
• Light and shade check by gradation bar display.

Vehicle Signals

Diagnosis of signals can be performed for vehicle speed, parking brake, 
lights, ignition and reverse.

Speaker Test

Speaker connection can be confirmed by test tone.

Error History

• The system malfunction and frequency of past occurrences is displayed. 
• When malfunctioning item is selected, time and place that the malfunc-

tion last occurred are displayed.

Camera Cont.

• Guiding line position that overlaps rear view camera image can be ad-

justed.

• Configuration stored in the AV control unit can be checked.

Vehicle CAN Diagnosis

Transmit/receive function of CAN communication can be monitored.

AV COMM Diagnosis

Communication condition of each unit of Multi AV system can be moni-
tored.

Delete Unit Connection Log

Erase connection history of unit and error history.

Initialize Settings

Initializes the AV control unit memory.

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AV-64

< SYSTEM DESCRIPTION >

[MID AUDIO WITHOUT BOSE]

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

3. While pressing the SETTING button, turn the volume control dial

clockwise or counterclockwise for 40 clicks or more. When self-

diagnosis mode begins, a short beep will be heard. 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

AV Control 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 self diagnosis is com-

pleted. Unit names and connection lines are color coded accord-

ing to diagnostic results.Control Unit (AV control unit) is

displayed in red. 

1: Control Unit (AV control unit) is displayed in red.

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SKIB3961E

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Diagnosis results

Unit

Connection line

Normal

Green

Green

Connection malfunction

Gray

Yellow

Unit malfunction 

1

Red

Green

AV

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-65

< SYSTEM DESCRIPTION >

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• Replace AV control unit if Self Diagnosis did not run because control unit malfunction is indicated. The symptom is AV control

unit internal error. Refer to 

AV-187, "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.

AV Control Unit Self Diagnosis Results

AV Control Unit Confirmation/Adjustment

1. Select Confirmation/Adjustment.

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Only Unit Part Is Displayed In Red

Screen switch

Description

Possible cause

Control unit

Malfunction is detected in AV control unit 
power supply or ground circuit.

• AV control unit power supply or ground 

circuits. Refer to 

AV-144, "AV CONTROL 

UNIT : Diagnosis Procedure"

.

• If no malfunction is detected in AV control 

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

AV-187, 

"Removal and Installation"

.

A Connecting Cable Between Units Is Displayed In Yellow

Area with yellow connection lines

Description

Possible cause

Control unit 

⇔ Front Display

Malfunction is detected in serial communi-
cation circuits between AV control unit and 
display unit.

Serial communication circuits between AV 
control unit and display unit. Refer to 

AV-

136, "Diagnosis Procedure"

.

Control unit 

⇔ SAT

When any of the following is detected:
• satellite radio tuner power supply or 

ground circuit malfunction.

• communication circuit malfunction be-

tween AV control unit and satellite radio 
tuner.

• request signal circuit malfunction be-

tween AV control unit and satellite radio 
tuner.

• Satellite radio tuner power supply or 

ground circuits. Refer to 

AV-146, "SAT-

ELLITE RADIO TUNER : Diagnosis Pro-
cedure"

.

• Communication circuit between AV con-

trol unit and satellite radio tuner. Refer to 

AV-138, "Diagnosis Procedure"

.

• Request signal circuit between AV con-

trol unit and satellite radio tuner. Refer to 

AV-138, "Diagnosis Procedure"

.

Control unit 

⇔ BTHF

When any of the following is detected:
• Bluetooth

®

 control unit power supply or 

ground circuit malfunction.

• AV communication circuit malfunction 

between AV control unit and Bluetooth

®

 

control unit.

• Bluetooth

®

 control unit power supply or 

ground circuits. Refer to 

AV-147, "BLUE-

TOOTH® CONTROL UNIT : Diagnosis 
Procedure"

.

• AV communication circuits between AV 

control unit and Bluetooth

®

 control unit.

AV-66

< SYSTEM DESCRIPTION >

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DIAGNOSIS SYSTEM (AV CONTROL UNIT)

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 comparison check can be made of each actual vehicle signal and

the signals recognized by the system.

Speaker Test

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