CAN COMMUNICATION SYSTEM GENERAL


  1. OUTLINE


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


      • The CAN V bus, sub bus 2 and sub bus 13 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

      • ECM

      • Combination Meter Assembly
      CAN Sub Bus 2

      • Network Gateway ECU

      • CAN No. 4 Junction Connector
      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 network gateway ECU has a gateway function and is used to transmit data between the CAN V bus and CAN sub bus 2.

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

    6. The driving support ECU assembly has a gateway function and is used to transmit data between the CAN Sub bus 2 and CAN sub bus 13.