Operation Procedure

WARNING: This page is about a different car, the 2006 Infiniti QX56. 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 "MEMORY 4" 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 "BACK" button.
  
  Fig 1: Turning Volume Control Dial Clockwise Or Counterclockwise For 30 Clicks
  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.

Fig 2: Self-Diagnosis Screen - Self-Diagnosis (DCU)
Courtesy of NISSAN MOTOR CO., U.S.A.
When "Confirmation/Adjustment" is selected on the initial self-diagnosis screen, the operation will enter the CONFIRMATION/ADJUSTMENT mode. In this mode, check and adjustment of each item will become possible.
The initial trouble diagnosis screen will be shown, and items "Display Diagnosis", "Vehicle Signals", "Auto Climate Control" and "Navigation" will become selective.
Select each switch on "CONFIRMATION/ADJUSTMENT" screen to display the relevant diagnosis screen.

Fig 3: Self-Diagnosis Screen - CONFIRMATION/ADJUSTMENT
Courtesy of NISSAN MOTOR CO., U.S.A.