CAN COMMUNICATION SYSTEM


  1. OUTLINE


    1. The Controller Area Network (CAN) is a serial data communication network for real time application. It is a multiplex communication network equipped in a vehicle, and has communication speeds of 500 kbps (HS-CAN) and 250 kbps (MS-CAN), and the ability to detect malfunctions.

    2. The HS-CAN consists of the V bus, bus 2, bus 3, bus 5 and sub bus 12.

    3. The MS-CAN consist of the sub bus 1.

    4. The communication wire used is a twisted-pair wire. The bus line has a high line (2.5 V to 3.5 V of voltage is applied) and a low line (1.5 V to 2.5 V of voltage is applied).

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

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

      • CAN Bus 2

      • CAN Bus 3

      • CAN Bus 5
      CAN Bus 2

      • ECM

      • Combination Meter Assembly

      		 Central Gateway ECU (Network Gateway ECU)

      • CAN V Bus

      • CAN Bus 3

      • CAN Bus 5
      Main Body ECU (Multiplex Network Body ECU) CAN Sub Bus 1
      Power Management Control ECU CAN Sub Bus 12
      CAN Bus 3 Central Gateway ECU (Network Gateway ECU) Central Gateway ECU (Network Gateway ECU)

      • CAN V Bus

      • CAN Bus 2

      • CAN Bus 5
      CAN Bus 5

      • Power Management Control ECU

      • Central Gateway ECU (Network Gateway ECU)

      		 Central Gateway ECU (Network Gateway ECU)

      • CAN V Bus

      • CAN Bus 2

      • CAN Bus 3
      CAN Sub Bus 12

      • Power Management Control ECU

      • ECM

      		 Power Management Control ECU CAN Bus 2
      Middle-speed (MS-CAN) CAN Sub Bus 1

      • Main Body ECU (Multiplex Network Body ECU)

      • CAN No. 6 Junction Connector

      		 Main Body ECU (Multiplex Network Body ECU) CAN Bus 2