Information Bus: Description and Operation

CAN COMMUNICATION

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). 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.

Input/Output Signal Chart:

For A/T Models

System Diagram (For TCS Model):

Input/Output Signal Chart:

For TCS Models

ABS/TCS COMMUNICATION LINE

This CAN communication line is used to control the smooth engine operation during the ABS or TCS operation. Pulse signals are exchanged between ECM and ABS actuator and electric unit or ABS/TCS control unit. Be sure to erase the malfunction information such as DTC not only in ABS actuator and electric unit or ABS/TCS control unit but also ECM after the ABS or ABS/TCS related repair.