ON-BOARD DIAGNOSTIC OUTLINE [CAN (CONTROLLER AREA NETWORK)]

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• The CAN system related module has an on-board diagnostic function.
• The on-board diagnostic function consists of the following functions.

  ― Failure detection function, which detects DTCs malfunctions in CAN system-related parts.
  ― Memory function, which stores detected.
  ― Self-malfunction diagnostic function, which indicates system malfunctions using DTCs and warning lights.

• Using the Mazda Modular Diagnostic System (M-MDS), DTCs can be read out and deleted.
• The CAN system has a fail-safe function. When a malfunction occurs in CAN system, the transmission module sends a warning signal and the receiving module illuminates the warning light.