2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Can Diag Support Monitor: Notes

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

OPERATION PROCEDURE 

  1. Start the engine.
  2. Turn the audio system off.
  3. 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 "PREV" button.
      Fig 1: Identifying Pause Switch
      G03501220Courtesy of NISSAN MOTOR CO., U.S.A.
  4. The initial trouble diagnosis screen will be shown, and items "Self-Diagnosis (DCU)", "Self-Diagnosis (NAVI)", "Confirmation/ Adjustment" and "CAN DIAG SUPPORT MONITOR" will become selective.
  5. Select "CAN DIAG SUPPORT MONITOR".
    Fig 2: Navigation System Display (Self Diagnosis)
    G03501221Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Display status of CAN communication.
ERROR COUNTER SPECIFICATION

Item Content Error counter
CANCOMM OK/NG 0-50
CAN_CIR_C1 OK/UNKWN 0-50
CAN_CIR_C2 OK/UNKWN 0-50
CAN_CIR_C3 OK/UNKWN 0-50
CAN_CIR_C4 OK/UNKWN 0-50
CAN_CIR_C5 OK/UNKWN 0-50
CAN_CIR_C6 OK/UNKWN 0-50
CAN_CIR_C7 OK/UNKWN 0-50
CAN_CIR_C8 OK/UNKWN 0-50
CAN_CIR_C9 OK/UNKWN 0-50
Fig 3: Navigation System Display (CAN Diag Support Monitor )
G03501222Courtesy 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.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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