Corolla L4-1.8L (2ZZ-GE) (2005)
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Information Bus: Description and Operation
System Description
System Diagram
SYSTEM DESCRIPTION
1. BRIEF DESCRIPTION
a. CAN (Controller 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. The CAN performs the communication based on the differential voltage by pairing the CANH bus line and CANL bus line.
c. This vehicle uses the CAN communication system for communication between the following ECU and sensors in the ABS with EBD & BA &
TRC & VSC system.
d. The CAN has two resistors of 120 Ohms that are necessary for communication to the main bus line.
2. DEFINITION OF TERMS
a. Main bus line
1. Main bus line is a wire harness between the two terminus circuits on the bus (communication line). This is the main bus in the CAN
communication system.
b. Sub bus line
1. Sub bus line is a wire harness which diverges from the main bus line, which is the main bus of the CAN bus, to an ECU or sensor.
3. ECU OR SENSORS WHICH COMMUNICATE THROUGH THE CAN COMMUNICATION SYSTEM
a. Skid Control ECU
b. Steering Sensor
c. Yaw Rate Sensor
4. DIAGNOSTIC CODES FOR THE CAN COMMUNICATION SYSTEM
a. DTCs for the CAN communication system are as follows:
U0073/94, U0123/62, U0124/95, U0126/63
