Comparison Between CAN and Conventional Data Communication

COMPARISON BETWEEN CAN AND CONVENTIONAL DATA COMMUNICATION

- With conventional data communication, each sensor relies on its dedicated wiring for message to be sent between units. As data volume grows, so does the volume of wiring .
- CAN uses only one twisted-pair cable to connect between units for shared communication.




CONVENTIONAL COMMUNICATION

NOTE: Conventional data communication needs as many data transmission lines as sensors used. (parallel signals)




CAN COMMUNICATION

NOTE:
- With CAN, one twisted-pair cable (2 wires) manages transmission of all data. (serial communication)
- The main wire runs between the terminal resistor on the ECM and that on the ABSCM or vehicle dynamics control (VDC) CM & H/U. Other units are connected, in parallel, to the main wire via branch wires.