CAN COMMUNICATION SYSTEM GENERAL


  1. OUTLINE


    1. The Controller Area Network (CAN) is a serial data communication network for real time application. It is a multiplex communication network to be 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 and sub bus (except sub bus 1).

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

    4. The network gateway ECU has a gateway function and is used to transmit data between the V bus, sub bus 2*1 or sub bus 18*2 and sub bus 19*2.


      • *1: Models without Lexus dynamic handling system

      • *2: Models with Lexus dynamic handling system

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

    6. The CAN has 2 terminating resistors which are necessary for accurate judgment of communication on the main bus.

    7. 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).