Yaris L4-1.5L (1NZ-FE) (2007)
Information Bus: Description and Operation
System Diagram
SYSTEM DIAGRAM
HINT: The power steering ECU and center airbag sensor assembly use the CAN communication system to perform DTC communication instead of the
conventional communication line (SIL).
SYSTEM DESCRIPTION
1. BRIEF DESCRIPTION
a. The CAN (Control Area Network) is a serial data communication system for real time application. It is a vehicle multiplex communication
system which has a high communication speed (500 kbps) and the ability to detect malfunctions.
b. By pairing the CANH and CANL bus lines, the CAN performs communication based on differential voltages.
c. Many ECUs (sensors) installed on the vehicle operate by sharing information and communicating with each other.
d. The CAN has two 120 ohms resistors which are necessary to communicate with the main wire.
2. DEFINITION OF TERMS