Electronic Steering Column Lock (ESCL)
The ESCL is needed to lock the steering column in order to prevent unauthorized usage of the vehicle.
In order to achieve the required safety integrity level, the ESCL is controlled and monitored by the IBU.
Such redundant architecture guarantees that the ESCL motor is supplied only during locking/unlocking operation and that it is disconnected from the battery and ground lines otherwise to avoid unexpected operation while the vehicle is in motion.
Data are exchanged between the ESCL and IBU through an encrypted serial communication interface.