CAN COMMUNICATION SYSTEM


  1. OUTLINE


    1. Models without Central Gateway ECU


      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 V bus.

      3. CAN has two terminating resistors which are necessary for accurate judgment of communication on the main wire.

      4. The terminating resistors for the V bus are located in the ECM and the combination meter assembly.

    2. Models with Central Gateway ECU


      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 V bus, bus 2, bus 3 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 V Bus Central Gateway ECU (Network Gateway ECU) Central Gateway ECU (Network Gateway ECU) to each bus
        CAN Bus 2

        • Combination Meter Assembly

        • ECM

        		 Central Gateway ECU (Network Gateway ECU) to each bus
        CAN Bus 3 Central Gateway ECU (Network Gateway ECU) Central Gateway ECU (Network Gateway ECU) to each bus
        CAN Bus 5 Central Gateway ECU (Network Gateway ECU) Central Gateway ECU (Network Gateway ECU) to each bus