Diagnosis Description

MULTIFUNCTION SWITCH AND PRESET SWITCH SELF-DIAGNOSIS FUNCTION 

The ON/OFF operation (continuity) of each switch in the multifunction switch and preset switch can be checked.

Self-Diagnosis Mode 

• Press the "BACK (A)" switch and the "↑ (B)" switch of the 8-direction switches within 10 seconds after turning the ignition switch from OFF to ACC and hold them for 3 seconds or more. Then the buzzer sounds, all indicators of the preset switch illuminate, and the self-diagnosis mode starts.
• The continuity of each switch at the ON position can be checked by pressing the switch. The buzzer sounds if the switch is normal.
  NOTE: The hazard switch and CD eject switch cannot be checked.
  Fig 1: Identifying BACK Switch

  Courtesy of NISSAN MOTOR CO., U.S.A.

Finishing Self-Diagnosis Mode 

Self-diagnosis mode is canceled when turning the ignition switch OFF.

MULTI AV SYSTEM ON BOARD DIAGNOSIS FUNCTION 

• The AV control unit diagnosis function starts up with multifunction switch operation and the AV control unit performs a diagnosis for each unit in the system during the on board diagnosis.
• Perform a CONSULT-III diagnosis if the on board diagnosis does not start, e.g., the screen does not display anything, the multifunction switch does not function, etc.

ON BOARD DIAGNOSIS 

Description 

• The trouble diagnosis function has a self-diagnosis mode for conducting trouble diagnosis automatically and a confirmation/adjustment mode for operating manually.
• Self-diagnosis mode performs the AV control unit diagnosis and the connection diagnosis between each of the units that make up the system, and it indicates the results to the display.
• The confirmation/adjustment mode allows the technician to check, modify or adjust the vehicle signals and set values, as well as to monitor the system error records and system communication status. The checking, modifying or adjusting actions generally require human intervention and judgment (the system cannot make judgment automatically).

On Board Diagnosis Item 

Mode		Description
Self-Diagnosis		AV control unit diagnosis. Perform the connection diagnosis between each of the units.
Confirmation/Adjustment	Display Diagnosis	The confirmations of the tint with the color spectrum bar display and shading of color with the gradation bar display can be performed.
	Vehicle Signals	Diagnosis of signals can be performed for vehicle speed, parking brake, lights, ignition switch, and reverse.
	Speaker Test	The connection of a speaker can be confirmed by test tone.
	Climate Control	Start auto air conditioner system self-diagnosis.
	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.
	Vehicle CAN Diagnosis	The transmitting/receiving of CAN communication can be monitored.
	AV COMM Diagnosis	The communication condition of each unit of Multi AV system can be monitored.
	Delete Unit Connection Log	Erase the connection history of unit and error history.
	Initialize Settings	Initializes the AV control unit memory.

STARTING PROCEDURE 

1. Start the engine.
2. Turn the audio system OFF.
3. While pressing the "SETTING" button, turn the volume control dial clockwise or counterclockwise for 40 clicks or more. (When the self-diagnosis mode is started, a short beep will be heard.)
   • Shifting from current screen to previous screen is performed by pressing "BACK" button.
     Fig 2: Turning Volume Control Dial Clockwise Or Counterclockwise

     Courtesy of NISSAN MOTOR CO., U.S.A.
4. The trouble diagnosis initial screen is displayed, and then the items of "Self Diagnosis" and "Confirmation/Adjustment" can be selected.
   Fig 3: Identifying Screen Display - Self Diagnosis & Confirmation/Adjustment

   Courtesy of NISSAN MOTOR CO., U.S.A.

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.
     Fig 4: Identifying Screen Display - Progress Of Trouble Diagnosis

     Courtesy of NISSAN MOTOR CO., U.S.A.
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.
   DIAGNOSTIC RESULTS REFERENCE TABLE
   
   

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

   NOTE:

   • Only the control unit (AV control unit) is displayed in red.
   • Replace AV control unit if "Self-Diagnosis did not run because of a control unit malfunction" is indicated. The symptom is AV control unit internal error.
   Fig 5: Identifying Screen Display - Diagnostic Results

   Courtesy of NISSAN MOTOR CO., U.S.A.

• 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 with a component in the diagnosis result screen.
  Fig 6: Identifying Screen Display - Self-Diagnosis Results

  Courtesy of NISSAN MOTOR CO., U.S.A.

SELF-DIAGNOSIS RESULTS 

Check the applicable display at the following table, and then repair the malfunctioning parts.

Diagnosis results	Detection logic	Possible malfunction location/Action to take
Control Unit unit: red NOTE: When a control unit malfunction is detected (red in unit display), connection malfunctions with other connection unit may be displayed.	Malfunction is detected in AV control unit power supply and ground circuits.	Check AV control unit power supply and ground circuits. When detectiong no malfunction in those components, replace AV control unit.
"Self-Diagnosis did not run because of a control unit malfunction"
Front Display unit: gray connection line: yellow	When either one of the following items is detected: serial communication circuits between AV control unit and front display unit are malfunctioning. serial communication signal between AV control unit and front display unit is malfunctioning.	Serial communication circuits between AV control unit and front display unit.
SAT unit: gray connection line: yellow	When either one of the following items is detected: satellite radio tuner power supply and ground circuits are malfunctioning. serial communication circuits between AV control unit and satellite radio tuner are malfunctioning. serial communication or request signal between AV control unit and satellite radio tuner is malfunctioning. request signal circuit between AV control unit and satellite radio tuner is malfunctioning.	Satellite radio tuner power supply and ground circuits. Serial communication circuits between AV control unit and satellite radio tuner. Request signal circuit between AV control unit and satellite radio tuner.
BTHF unit: gray connection line: yellow	When either one of the following items is detected: TEL adapter unit power supply and ground circuits are malfunctioning. AV communication circuits between multifunction switch and TEL adapter unit are malfunctioning. AV communication signal between AV control unit and TEL adapter unit is malfunctioning.	TEL adapter unit power supply and ground circuits. AV communication circuits between multifunction switch and TEL adapter unit.

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 "Inspection & Adjustment Mode" screen to display the relevant trouble diagnosis screen. Press the "RETURN" switch to return to the initial Inspection & Adjustment Mode screen.
   Fig 7: Identifying Screen Display - Confirmation/Adjustment Mode

   Courtesy of NISSAN MOTOR CO., U.S.A.

Display Diagnosis 

The tint of the color bar indication is as per the following list if RGB signal error is detected.

R (red) signal error: Light blue (Cyan) tint 

G (green) signal error: Purple (Magenta) tint 

B (blue) signal error: Yellow tint 

Vehicle Signals 

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

Diagnosis item	Display	Vehicle status	Remarks
Vehicle speed	ON	Vehicle speed > 0 km/h (0 MPH)	Changes in indication may be delayed. This is normal.
	OFF	Vehicle speed = 0 km/h (0 MPH)
Parking brake	ON	Parking brake is applied.
	OFF	Parking brake is released.
Lights	ON	Light switch ON.	-
	OFF	Light switch OFF.
Ignition	ON	Ignition switch ON.	-
	OFF	Ignition switch in ACC position.
Reverse	ON	Shift the selector lever to "R" position.	Changes in indication may be delayed. This is normal.
	OFF	Shift the selector lever other than "R" position.

Speaker Test 

Select "SPEAKER DIAGNOSIS" to display the Speaker Diagnosis screen. Press "START and NEXT" to generate a test tone in a speaker. Press "Start" to generate a test tone in the next speaker. Press "End" to stop the test tones.

Front Tweeter: 3 kHz 

Front speaker: 300 Hz 

Rear speaker: 1 kHz 

Climate Control 

Refer to "HEATER & COOLING UNIT ASSEMBLY " for details.

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 SW 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.

Count up method A

• The counter resets to 0 if an error occurs when IGN switch is turned ON. The counter increases by 1 if the condition is normal at a next IGN ON cycle.
• The counter upper limit is 39. Any counts exceeding 39 are ignored. The counter can be reset (no error record display) with the "Delete log" switch or CONSULT-III.

Count up method B

• The counter increases by 1 if an error occurs when IGN switch is ON. The counter will not decrease even if the condition is normal at the next IGN ON cycle.
• The counter upper limit is 50. Any counts exceeding 50 are ignored. The counter can be reset (no error record display) with the "Delete log" switch or CONSULT-III.

Display type of occurrence frequency	Error history display item
Count up method A	CAN communication line, control unit (CAN), AV communication line, control unit (AV communication)
Count up method B	Other than the above

Error item

Some error items may be displayed simultaneously according to the cause. If some error items are displayed simultaneously, the detection of the cause can be performed by the combination of display items

Error item	Detection logic	Possible malfunction factor/Action to take
CAN COMM CIRCUIT	CAN communication malfunction is detected.	Perform diagnosis with CONSULT-III, and then repair the malfunctioning parts according to the diagnosis results. Refer to DIAGNOSIS PROCEDURE  .
CONTROL UNIT (CAN)	CAN initial diagnosis malfunction is detected.	Replace the AV control unit.
CONTROL UNIT (AV)	AV communication circuit initial diagnosis malfunction is detected.
FLASH-ROM Error Of Control Unit	AV control unit malfunction is detected.
CAN Controller Memory Error
Front Display Connection Error	When either one of the following items is detected: front display unit power supply and ground circuits are malfunctioning. serial communication circuits between AV control unit and front display unit are malfunctioning. serial communication signal between AV control unit and front display unit is malfunctioning.	Front display unit power supply and ground circuits. Serial communication circuits between AV control unit and front display unit.
SAT Connection Error	When either one of the following items is detected: satellite radio tuner power supply and ground circuits are malfunctioning. serial communication circuits between AV control unit and satellite radio tuner are malfunctioning. serial communication or request signal between AV control unit and satellite radio tuner is malfunctioning. request signal circuit between AV control unit and satellite radio tuner is malfunctioning.	Satellite radio tuner power supply and ground circuits. Serial communication circuits between AV control unit and satellite radio tuner. Request signal circuit between AV control unit and satellite radio tuner.
AV COMM CIRCUIT Switches Connection Error	When either one of the following items is detected: multifunction switch power supply and ground circuits are malfunctioning. AV communication signal between AV control unit and multifunction switch is malfunctioning.	Multifunction switch power supply and ground circuits.
AV COMM CIRCUIT H/F Unit Connection Error	When either one of the following items is detected: TEL adapter unit power supply and ground circuits are malfunctioning. AV communication circuits between multifunction switch and TEL adapter unit are malfunctioning. AV communication signal between AV control unit and TEL adapter unit is malfunctioning.	TEL adapter unit power supply and ground circuits. AV communication circuit between multifunction switch and TEL adapter unit.
AV COMM CIRCUIT Switches Connection Error H/F Unit Connection Error	Malfunction is detected in AV communication circuits between AV control unit and multifunction switch.	AV communication circuits between AV control unit and multifunction switch. Check and repair the short circuit in AV communication circuits.

Vehicle CAN Diagnosis 

• CAN communication status and error counter is displayed.
• 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.

Items	Display (Current)	Malfunction counter (Past)
Tx (HVAC)	OK / UNKWN	OK / 0 - 39
Rx (ECM)	OK / UNKWN	OK / 0 - 39
Rx (Cluster)	OK / UNKWN	OK / 0 - 39
Rx (BCM)	OK / UNKWN	OK / 0 - 39
Rx (HVAC)	OK / UNKWN	OK / 0 - 39
Rx (USM)	OK / UNKWN	OK / 0 - 39
Rx (TPMS)	OK / UNKWN	OK / 0 - 39

AV COMM Diagnosis 

• Displays the communication status between AV control 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.
• If it resets, the error counter is erased.

Items	Status (Current)	Counter (Past)
C Tx (ITM-SW)	OK / UNKWN	OK / 0 - 39
C Rx (Primary SW-ITM)	OK / UNKWN	OK / 0 - 39
C Rx (BTHF-ITM)	OK / UNKWN	OK / 0 - 39

Delete Unit Connection Log 

Deletes any unit connection records and error records from the AV control unit memory. (Clear the records of the unit that has been removed)

Initialize Settings 

Initializes the AV control unit memory.