Nissan Murano: System Description / Diagnosis System (audio Unit)

Description

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

Perform CONSULT diagnosis if the audio unit on board diagnosis does not start, or the screen does not display anything.

METHOD OF STARTING

Audio Unit Self Diagnosis

1. Ignition switch ON.

2. Turn the audio system OFF.

3. While pressing the MENU button, turn the TUNE-SCROLL dial counterclockwise for 3 or more clicks, clockwise for 3 or more clicks, counterclockwise for 3 or more clicks. Shifting from current screen to previous screen is performed by pressing BACK button.

   

4. The trouble diagnosis initial screen is displayed, and “Self Diagnosis” and “Confirmation/Adjustment” can be selected.

   

SELF-DIAGNOSIS MODE

1. Start the self-diagnosis function and select “Self Diagnosis”.

   • Self-diagnosis subdivision screen is displayed, and the self-diagnosis mode starts.

   • The bar graph visible on the center of the self-diagnosis subdivision screen indicates progress of the trouble diagnosis.

2. Diagnosis results are displayed after the self-diagnosis is completed. The unit names and the connection lines are color-coded according to the diagnostic results.

   

   Diagnosis results	Unit	Connection line
   Normal	Green	Green
   Connection malfunction	Gray	Yellow
   Unit malfunction Note	Red	Green

   NOTE:

   Control Unit (audio unit) is displayed in red.

   • Replace audio unit if “Self-Diagnosis did not run because of a control unit malfunction” is indicated. The symptom is audio unit internal error. Refer to 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.

   • The comments of the self-diagnosis results can be viewed in the diagnosis result screen.

Detection Range of Self-diagnosis Mode

• The self-diagnosis mode allows the technician to diagnose the connection in the communication line between audio unit and each unit and the internal operation of the audio unit.

• Because the start condition of diagnosis function is a switch operation, the on board diagnosis function cannot be started up if any malfunction is detected in the audio unit switches.

SELF-DIAGNOSIS RESULTS

Only Unit Part Is Displayed In Red.

A Connecting Cable Between Units Is Displayed In Yellow.

CONFIRMATION/ADJUSTMENT MODE

1. Start the diagnosis function and select “Confirmation/Adjustment”. The confirmation/adjustment mode indicates where each item can be checked or adjusted.

2. Select each switch on the “Confirmation/Adjustment Mode” screen to display the relevant trouble diagnosis screen. Touch the “Back” to return to the initial Confirmation/Adjustment Mode screen.

   

Display Diagnosis

Confirmation of the audio unit screen operation.

Vehicle Signals

A comparison check can be made of each actual vehicle signal and the signals recognized by the system.

Navigation

Displayed, but not used.

Error Location Display

Results of the error occurrence are represented by the time the error occurred.

AV COMM Diagnosis

AV COMM Monitor

• Displays the communication status between audio unit (master unit) and each unit.

• The error counter displays “OK” if any malfunction was not detected in the past and displays “0” if a malfunction is detected. It increases by 1 if the condition is normal at the next ignition switch ON cycle. The upper limit of the counter is 39.

• The error counter is erased if “Reset” is pressed.

Camera

Delete Unit Connection Log

Deletes error records from the audio unit memory.

Initialize Settings

Initializes the audio unit memory.

GPS Time Set

Displayed, but not used.

Version Information

Version information of the components of the Multi AV system are displayed.

Software Update

Version of the audio unit software can be update.

### Speaker Test

Two test tones, 100Hz and 4KHz, can be generated to each speaker.

Radio Tuner

Displays FM and AM monitor information.

SXM

Displays SXM monitor information.

CONSULT FUNCTIONS

CONSULT performs the following functions via communication with the audio unit:

ECU IDENTIFICATION

The part number of audio unit is displayed.

SELF DIAGNOSTIC RESULT

Refer to DTC Index.

DATA MONITOR

NOTE:

The following table includes information (items) inapplicable to this Nissan Murano vehicle. For information (items) applicable to this vehicle, refer to CONSULT display items.

CONFIGURATION

Refer to Description.

CAN DIAG SUPPORT MNTR

Refer to CAN Diagnostic Support Monitor.