Operation CHARM: Car repair manuals for everyone.

CAN Communication System Description

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). 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.

CAN Communication Unit For AWD Models:




CAN communication unit for AWD models

TYPE 17/TYPE 18/TYPE 19/TYPE 20/TYPE 21/TYPE 22/TYPE 23/TYPE 24













System diagram

Input/Output Signal Chart Part 1:




Input/Output Signal Chart Part 2:




Input/Output signal chart

TYPE 25/TYPE 26/TYPE 27/TYPE 28/TYPE 29/TYPE 30/TYPE 31/TYPE 32










System diagram

Input/Output Signal Chart Part 1:




Input/Output Signal Chart Part 2:




Input/Output signal chart