Mechanism & Function -- LAN System: General: LAN

The LAN system* enables data sharing among computers, that otherwise are left to function as independent systems, by connecting them via communications lines.
Introduction of the LAN^*1 system has improved equipment and functions while reducing the weight of the vehicle by eliminating a considerable amount of harnesses.
Data transmission/reception is via CAN^*2 , which offers high-speed communication and also ensures a high level of reliability.
Depending on control requirements, two transmission rates are used: high-speed CAN running at 500 Kbps, which is an ISO 11898 and manages power-related units; and low-speed CAN running at 125 Kbps, which is an ISO 11519-2 and manages body-related functions.
Networks running at different transmission rates usually cannot share data between them, however, the body integrated unit with a gateway (hookup) function enables data sharing between different-rate networks.

NOTE: 1*: LAN (Local Area Network). A system where multiple computers (units) are linked via serial communication for data sharing.
*2: CAN (Controller Area Network). A serial communications protocol in compliance with ISO 11898 and ISO 11519-2.