CAN COMMUNICATION SYSTEM


  1. OUTLINE


    1. The Controller Area Network (CAN) uses 2 different types of CAN buses:


      • The CAN V bus, bus 1, bus 2, bus 3 are HS-CAN buses that operate at 500 kbps.

      • The CAN sub bus 1 is an MS-CAN bus that operates at 250 kbps.

    2. Each CAN bus has 2 terminating resistors which are necessary for accurate judgment of communication.

    3. The terminating resistors for each bus are located as shown in the following table.

      Speed Communication Bus Terminating Resistor Location
      High-speed (HS-CAN) CAN V Bus Central Gateway ECU
      CAN Bus 1

      • Central Gateway ECU

      • CAN No. 2 Junction Connector
      CAN Bus 2

      • ECM

      • Combination Meter Assembly
      CAN Bus 3 Central Gateway ECU
      CAN Sub Bus 13

      • Driving Support ECU Assembly

      • Lane Recognition Camera Sensor Assembly

      • Millimeter Wave Radar Sensor Assembly
      Middle-speed (MS-CAN) CAN Sub Bus 1

      • Main Body ECU (Multiplex Network Body ECU)

      • CAN No. 1 Junction Connector

    4. The central gateway ECU has a gateway function and is used to transmit data between the CAN V bus, CAN bus 1, CAN bus 2 and CAN bus 3.

    5. The main body ECU (multiplex network body ECU) has a gateway function and is used to transmit data between the CAN bus 2 and CAN sub bus 1.

    6. The driving support ECU assembly has a gateway function and is used to transmit data between the CAN bus 1and CAN sub bus 13.