Operation Procedure

WARNING: This page is about a different car, the 2006 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Start the engine.
Turn the audio system off.
While pressing the "PAUSE/MUTE" button, turn the volume control dial clockwise or counterclockwise for 30 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 "SCAN" button.
  
  Fig 1: Turning Audio System Off
  Courtesy of NISSAN MOTOR CO., U.S.A.
The initial self-diagnosis screen will be shown, and items "Self- Diagnosis (DCU)", "Self-Diagnosis (NAVI)", "Confirmation/Adjustment" and "CAN DIAG SUPPORT MONITOR" will become selective.
Select "CAN DIAG SUPPORT MONITOR".

Fig 2: Scan Tool Display - Self- Diagnosis (DCU)
Courtesy of NISSAN MOTOR CO., U.S.A.

Display status of CAN communication.

CAN COMMUNICATION ITEM CHART

Item	Content	Error counter
CAN_COMM	OK/NG	0-50
CAN_CIRC_1	OK/UNKWN	0-50
CAN_CIRC_2	OK/UNKWN	0-50
CAN_CIRC_3	OK/UNKWN	0-50
CAN_CIRC_4	OK/UNKWN	0-50
CAN_CIRC_5	OK/UNKWN	0-50
CAN_CIRC_6	OK/UNKWN	0-50
CAN_CIRC_7	OK/UNKWN	0-50
CAN_CIRC_8	OK/UNKWN	0-50
CAN_CIRC_9	OK/UNKWN	0-50

Fig 3: Scan Tool Display - CAN DIAG Support Monitor

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

If the ignition is turned on and UNKWN is shown on the screen, the value of the counter will be up. (MAX50)
The value of the counter does not change if the ignition changes to OFF. (MAX50)
If the counter shows the value of 50 and UNKWN is shown, the value of 50 will not be changed.