MULTIPLEX COMMUNICATION SYSTEM [TYPE-B]


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Outline

•  A control area network (CAN) system has been adopted in which the multiple control modules send/receive signals using two common communication lines.
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•  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.

CAN communication (L.H.D.)

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CAN communication (R.H.D.)

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Local CAN

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LIN communication

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ISO communication

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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

•  CAN BUS No.1 is used for communication between the following modules:
―  PCM
―  DSC HU/CM
―  Radar unit
―  TCM
―  Front body control module (FBCM)
―  Adaptive front lighting system (AFS) control module/auto leveling control module
―  Power liftgate (PLG) control module
―  Dosing control unit
―  NOx sensor No.1
―  NOx sensor No.2
―  PM sensor
―  Electric parking brake control module
―  4WD control module
―  DC-DC converter (i-ELOOP)
―  Position memory control module
―  Occupant classification sensor
―  Forward sensing camera (FSC)
―  EPS control module
―  Start stop unit
―  SAS control module
―  Gateway unit (GWU)
―  Active driving display
―  Instrument cluster
•  CAN BUS No.2 is used for communication between the following modules:
―  Instrument cluster
―  Gateway unit (GWU)
―  Wireless charger (Qi)
―  Climate control unit
―  Parking assist unit
―  Rear body control module (RBCM)
―  Blind spot monitoring (BSM) control module (LH)
•  CAN BUS No.3 is used for communication between the following modules:
―  Connectivity master unit (CMU)
―  360° view monitor control module
―  Audio amplifier
―  Gateway unit (GWU)
•  CAN BUS No.4 is used for communication between the following modules:
―  Telematics communication unit
―  Gateway unit (GWU)


Local CAN

•  Local CAN is used for communication between the following modules:
―  Between PCM and TCM
―  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 PCM and fuel injector No.1 (SKYACTIV-D 2.2)
―  Between PCM and fuel injector No.2 (SKYACTIV-D 2.2)
―  Between PCM and fuel injector No.3 (SKYACTIV-D 2.2)
―  Between PCM and fuel injector No.4 (SKYACTIV-D 2.2)
―  Between PCM and engine oil level sensor
―  Between PCM and active air shutter
―  Between PCM and glow control module
―  Between front body control module (FBCM) and humidity sensor/auto light sensor/rain sensor
―  Between front body control module (FBCM) and current sensor
―  Between front body control module (FBCM) and DC-DC converter
―  Between rear body control module (RBCM) and intruder sensor
―  Between rear body control module (RBCM) and theft-deterrent siren
―  Between adaptive front lighting system (AFS) control module and swivel actuator (LH)
―  Between adaptive front lighting system (AFS) control module and swivel actuator (RH)


ISO communication

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


Construction


CAN

•  The CAN BUS No.1 has terminal resistors built into the following units which form the CAN lines.
―  PCM
―  Instrument cluster
•  The CAN BUS No.2 has terminal resistors built into the following units which form the CAN lines.
―  Rear body control module (RBCM)
―  Instrument cluster
•  The CAN BUS No.3 has terminator resistors built into the following units which form the CAN lines.
―  Connectivity master unit (CMU)
―  Gateway unit (GWU)
•  The CAN BUS No.4 has terminal resistors built into the following units which form the CAN lines.
―  Telematics communication unit
―  Gateway unit (GWU)


Local CAN

•  The local CAN has terminator resistors built into the following units which form the CAN lines.
―  PCM
―  TCM
―  Blind spot monitoring (BSM) control module (LH)
―  Blind spot monitoring (BSM) control module (RH)


LIN communication

•  The LIN communication has drivers built into the following units which form the LIN communication lines.
―  PCM
―  Fuel injector No.1 (SKYACTIV-D 2.2)
―  Fuel injector No.2 (SKYACTIV-D 2.2)
―  Fuel injector No.3 (SKYACTIV-D 2.2)
―  Fuel injector No.4 (SKYACTIV-D 2.2)
―  Active air shutter
―  Glow control module
―  Engine oil level sensor
―  Front body control module (FBCM)
―  Humidity sensor/auto light sensor/rain sensor
―  Current sensor
―  DC-DC converter
―  Rear body control module (RBCM)
―  Intruder sensor
―  Theft-deterrent siren
―  Adaptive front lighting system (AFS) control module
―  Swivel actuator (LH)
―  Swivel actuator (RH)
―  Adaptive LED headlights control module
―  Front combination light (LH)
―  Front combination light (RH)


ISO communication

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