CAN Communication System Description

CAN Communication System Description

ECM (2), ABS / ESP(R) control module (1), TCM (CVT model) (3), BCM (4), 4WD control module (4WD model) (6), combination meter (7), keyless start control module (keyless start model) (5) and SDM (Advanced air bag model) (11), steering angle sensor (ESP(R) model) (8), yaw rate / G sensor (ESP(R) model) (9), ID controller (Canada model) (10) communicate control data between each control module.

Communication of each control module / sensor is established by CAN (Controller Area Network) communication system.










CAN communication system uses the serial communication in which data is transmitted at a high speed. It uses a twisted pair of two communication lines for the high-speed data transmission. As one of its characteristics, multiple control modules can communicate simultaneously. In addition, it has a function to detect a communication error automatically. Each module reads necessary data from the received data and transmits data.

CAN Communication System Transmitting and Receiving Data Table













*1: Sedan model only

NOTE:

- T (Transmitting): When two or more control modules start transmission at the same time, control module transmitting the highest priority information gets transmission right and all other control modules enter reception mode.
- R (Receiving): All control modules connected with CAN communication lines receive all information CAN communication line. Each control module selects only what is necessary and use it for its control function.
- : ECM, using wheel speed signal transmitted from ABS / ESP(R) control module, calculates and determines vehicle speed and transmit that information to each control module.