Iso 11898-3 Pdf -

Most new vehicles use high-speed CAN (ISO 11898-2) for powertrain and safety, and low-speed CAN for body controls. However, LIN bus has replaced low-speed CAN in many cost-sensitive applications.

ISO 11898-3 is a standard for low-speed, fault-tolerant, medium-dependent interface for controller area network (CAN) communication. Here's some proper text about it: iso 11898-3 pdf