Operation CHARM: Car repair manuals for everyone.

CAN Communication System



CAN COMMUNICATION
System Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability.

Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent).


VDC/TCS/ABS - CAN COMMUNICATION SYSTEM DIAGRAM:




VDC/TCS/ABS - CAN COMMUNICATION - INPUT/OUTPUT SIGNAL CHART:






In CAN communication, 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.