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 the ability to detect malfunctions.

    2. The HS-CAN consists of the diagnosis bus, bus 1, bus 2, bus 3, bus 4 and bus 5.

    3. 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).

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

      Bus Terminating Resistor Location Gateway Function Gateway Destination
      CAN Diagnosis Bus Central Gateway ECU (Network Gateway ECU) Central Gateway ECU (Network Gateway ECU)

      • Bus 1

      • Bus 2

      • Bus 3

      • Bus 4

      • Bus 5
      CAN Bus 1 Central Gateway ECU (Network Gateway ECU) Central Gateway ECU (Network Gateway ECU)

      • Diagnosis Bus

      • Bus 2

      • Bus 3

      • Bus 4

      • Bus 5
      CAN Bus 2

      • Central Gateway ECU (Network Gateway ECU)

      • ECM

      		 Central Gateway ECU (Network Gateway ECU)

      • Diagnosis Bus

      • Bus 1

      • Bus 3

      • Bus 4

      • Bus 5
      CAN Bus 3 Central Gateway ECU (Network Gateway ECU) Central Gateway ECU (Network Gateway ECU)

      • Diagnosis Bus

      • Bus 1

      • Bus 2

      • Bus 4

      • Bus 5
      CAN Bus 4

      • Central Gateway ECU (Network Gateway ECU)

      • Airbag Sensor Assembly

      		 Central Gateway ECU (Network Gateway ECU)

      • Diagnosis Bus

      • Bus 1

      • Bus 2

      • Bus 3

      • Bus 5
      CAN Bus 5

      • Central Gateway ECU (Network Gateway ECU)

      • Combination Meter Assembly

      		 Central Gateway ECU (Network Gateway ECU)

      • Diagnosis Bus

      • Bus 1

      • Bus 2

      • Bus 3

      • Bus 4