
45-1
45.1 LIN Background
Modern cars contain a large number of electronic control units (ECU). For example, the BMW AG
7-series (model 2008) has over 70 ECUs and about 100 dierent electric motors. e car’s comfort
domain has been much improved in recent years. Comfort functions such as electric window liers,
electric outside mirrors, central locking, air conditioning, electric seat adjustment, and an electrical
sliding roof are common features in today’s cars. In the past, when the number of features was low,
the various electrical devices were conventionally wired. However, as the number of features grew,
the wiring harness became unmana ...