CAN Communication Check

2006 Infiniti FX35 AWDSECTION CAN Communication Check
  1. CHECK MONITOR DESCRIPTION 
    1. Start self-diagnosis of DCU. Refer to "SELF-DIAGNOSIS MODE (DCU) ".
    2. Select "CAN DIAG SUPPORT MONITOR". Refer to "CAN DIAG SUPPORT MONITOR ".
      ITEM ERROR COUNTER CHART

      Item content Error counter (Reference value)
      Normal condition Error (Example)
      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 UNKWN UNKWN 0 - 50
      Fig 1: CAN DIAG SUPPORT MONITOR Screen Display
      G04079208Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Record each item display description (OK/NG/UNKWN) displayed on the following CAN DIAG SUPPORT MONITOR Check Sheet.

      CAN DIAG SUPPORT MONITOR Check Sheet 

      CAN DIAG SUPPORT MONITOR CHECK SHEET

      Diagnosis item Screen display Diagnosis item Screen display
      CAN_COMM OK NG CAN_CIRC_5 OK UNKWN
      CAN_CIRC_1 OK UNKWN CAN_CIRC_6 OK UNKWN
      CAN_CIRC_2 OK UNKWN CAN_CIRC_7 OK UNKWN
      CAN_CIRC_3 OK UNKWN CAN_CIRC_8 OK UNKWN
      CAN_CIRC_4 OK UNKWN CAN_CIRC_9 OK UNKWN
RENDER: 1.0x

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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.