What is LIN bus and how does it complement CAN?

Local Interconnect Network (LIN) is a low-cost, low-speed (up to 20 kbps) serial network for connecting simple sensors and actuators. It uses a single wire plus ground, with master-slave architecture where one master controls timing. LIN is used for non-critical functions like seat adjustment, mirrors, rain sensors, and door modules. It complements CAN by handling simpler functions at lower cost, with LIN sub-networks connecting to the main CAN network through gateway ECUs.