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

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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.
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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
―  Front body control module (FBCM)
―  TCM
―  Adaptive LED headlights control module/auto leveling control module
―  DC-DC converter (i-ELOOP)
―  Rear power seat control module (LH)
―  Electric parking brake control module
―  Position memory control module
―  Power liftgate (PLG) control module
―  Rear power seat control module (RH)
―  Rear one-touch walk-in control module
―  4WD control module
―  EPS control module
―  SAS control module
―  Start stop unit
―  Active driving display
―  Gateway unit (GWU)
―  Forward sensing camera (FSC)
―  Instrument cluster
•  CAN BUS No.2 is used for communication between the following modules:
―  Instrument cluster
―  Parking assist unit
―  Front climate control unit
―  Wireless charger (Qi)
―  Gateway unit (GWU)
―  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)


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 active air shutter
―  Between PCM and engine oil level sensor
―  Between front body control module (FBCM) and auto light sensor/humidity sensor/rain sensor
―  Between front body control module (FBCM) and current sensor
―  Between front body control module (FBCM) and DC-DC converter
―  Between front climate control unit and rear climate control unit
―  Between adaptive LED headlights control module and front combination light (LH)
―  Between adaptive LED headlights control module and front combination light (RH)


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 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)


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
―  Active air shutter
―  Engine oil level sensor
―  Front body control module (FBCM)
―  Auto light sensor/humidity sensor/rain sensor
―  Current sensor
―  DC-DC converter
―  Front climate control unit
―  Rear climate control unit
―  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.
―  Rear body control module (RBCM)
―  Start stop unit
―  Power window main switch