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).

      2. The HS-CAN consists of the V bus and sub bus 15.

      3. The hybrid vehicle control ECU has a gateway function and is used to transmit data between the V bus and sub bus 15.

      4. The CAN has two terminating resistors which are necessary for accurate judgment of communication on the main bus.

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

      6. The terminating resistors for sub bus 15 are located in the ECM and the hybrid vehicle control ECU.

    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, bus 5, sub bus 13 and sub bus 15.

      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 Sub-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
        CAN Sub Bus 13

        • Driving Support ECU Assembly

        • Millimeter Wave Radar Sensor Assembly

        		 Driving Support ECU Assembly to each bus
        CAN Sub Bus 15

        • Hybrid Vehicle Control ECU

        • ECM

        		 - -

  2. MAJOR DIFFERENCE


    1. The new models have been modified from the previous models as shown below:


      1. The central gateway ECU have been added.

      2. Power management control ECU has been replaced by hybrid vehicle control ECU.