CAN COMMUNICATION: System Description

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-board multiplex communication line with high data communication speed and excellent error detection ability. A modern vehicle is equipped with many electric control units, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, 2 control units are connected with 2 communication lines (CAN H-line, CAN L-line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

This vehicle contains 2 types of CAN communication systems: CAN communications and HEV system CAN communications. HPCM includes a CAN gateway function which transmits signals between CAN communications and HEV system CAN communications.

For details about CAN communications, refer to "CAN COMMUNICATION SYSTEM: SYSTEM DESCRIPTION ".