MULTIPLEX COMMUNICATION SYSTEM

id100000001400


Outline

•  A control area network (CAN) system has been adopted in which the multiple control modules send/receive signals using two common communication lines.
•  Local CAN, ISO communication, or LIN communication has been adopted for the individual communication between control modules in consideration of the communication speed and the cost.

System Wiring Diagram

Note
•  The following figure shows the CAN/LIN communication/ISO communication/local CAN connection conditions. The availability of the equipment may differ depending on the vehicle specifications.

L.H.D.

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R.H.D.

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Local CAN

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Structural View

Note
•  The following figure shows the installation positions for the equipment which perform CAN communication. The availability of the equipment may differ depending on the vehicle specifications.

L.H.D.

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R.H.D.

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Function


CAN (controller area network) system

•  HS-CAN (high-speed controller area network) is used for communication between the following modules:
―  PCM
―  DSC HU/CM
―  Radar unit (With smart brake support (SBS))
―  TCM (ATX)
―  Front body control module (FBCM)
―  Adaptive front lighting system (AFS) control module/auto leveling control module (With headlight auto leveling system)
―  DC-DC converter (i-ELOOP) (With i-ELOOP)
―  4WD control module (4WD)
―  Position memory control module (With memory power seat)
―  Electric parking brake control module
―  Audio amplifier (With Bose® type audio)
―  Forward sensing camera (FSC) (With forward sensing camera (FSC))
―  EPS control module
―  Mazda ERA-GLONASS control module (With Mazda ERA-GLONASS)
―  Start stop unit
―  Connectivity master unit (CMU) (With center display)
―  SAS control module
―  Instrument cluster
•  MS-CAN (mid-speed controller area network) is used for communication between the following modules:
―  Instrument cluster
―  Parking assist unit (With parking sensor system)
―  Climate control unit
―  Rear body control module (RBCM)
―  Rear mount camera (With rear mount camera (Predicted vehicle path assist lines display type))
―  Blind spot monitoring (BSM) control module (LH) (With blind spot monitoring (BSM) system)


Local CAN

•  Local CAN is used for communication between the following modules:
―  Between PCM and TCM
―  Between connectivity master unit (CMU), CD player/DVD/CD player, and tuner and amp unit (TAU)
―  Between audio unit, Bluetooth® unit, and CD player
―  Between blind spot monitoring (BSM) control module (LH) and blind spot monitoring (BSM) control module (RH)


LIN communication

•  LIN communication is used for communication between the following modules:
―  Between front body control module (FBCM) and auto light sensor/rain sensor/humidity sensor
―  Between front body control module (FBCM) and current sensor
―  Between front body control module (FBCM) and DC-DC converter
―  Between adaptive front lighting system (AFS) control module and swivel actuator (LH)
―  Between adaptive front lighting system (AFS) control module and swivel actuator (RH)
―  Between connectivity master unit (CMU) and commander switch
―  Between rear body control module (RBCM) and intruder sensor
―  Between rear body control module (RBCM) and theft-deterrent siren


ISO communication

•  ISO communication is used for communication between the following modules:
―  Between rear body control module (RBCM) and start stop unit
―  Between rear body control module (RBCM) and power window main switch


Construction


CAN

•  The HS-CAN has terminator resistors built into the following units which form the CAN lines.
―  Between PCM terminals 2AK (CAN_H) and 2AL (CAN_L)
―  Between instrument cluster terminals B (CAN_H) and D (CAN_L)
•  The MS-CAN has terminal resistors built into the following units which form the CAN lines.
―  Between rear body control module (RBCM) terminals 3E (CAN_H) and 3G (CAN_L)
―  Between instrument cluster terminals C (CAN_H) and E (CAN_L)


Local CAN

•  The local CAN has terminator resistors built into the following units which form the CAN lines.
―  Between PCM terminals 1A (CAN_H) and 1B (CAN_L) (SKYACTIV-G 2.0, SKYACTIV-G 2.5)
―  Between PCM terminals 1AD (CAN_H) and 1Y (CAN_L) (SKYACTIV-D 2.2)
―  Between TCM terminals G (CAN_H) and H (CAN_L)
―  Between audio unit terminals 1O (CAN_H) and 1Q (CAN_L)
―  Between CD player terminals G (CAN_H) and H (CAN_L) (Without center display)
―  Between connectivity master unit (CMU) terminals 2I (CAN_H) and 2J (CAN_L)
―  Between tuner and amp unit (TAU) terminals 2O (CAN_H) and 2Q (CAN_L) (L.H.D.)
―  Between tuner and amp unit (TAU) terminals 1AA (CAN_H) and 1AB (CAN_L) (R.H.D.)
―  Between blind spot monitoring (BSM) control module (LH) terminals A (CAN_H) and B (CAN_L) (Australian specs.)
―  Between blind spot monitoring (BSM) control module (RH) terminals A (CAN_H) and B (CAN_L) (Australian specs.)
―  Between blind spot monitoring (BSM) control module (LH) terminals G (CAN_H) and J (CAN_L) (Except Australian specs.)
―  Between blind spot monitoring (BSM) control module (RH) terminals G (CAN_H) and J (CAN_L) (Except Australian specs.)


LIN communication

•  The LIN communication has drivers built into the following units which form the LIN communication lines.
―  Front body control module (FBCM)
―  Auto light sensor/rain sensor/humidity sensor
―  Current sensor
―  DC-DC converter
―  Adaptive front lighting system (AFS) control module
―  Swivel actuator (LH)
―  Swivel actuator (RH)
―  Connectivity master unit (CMU)
―  Commander switch
―  Rear body control module (RBCM)
―  Intruder sensor
―  Theft-deterrent siren


ISO communication

•  The ISO communication has drivers built into the following units which form the ISO communication lines.
―  Rear body control module (RBCM)
―  Start stop unit
―  Power window main switch