Given that for autonomous vehicles the human will be a passenger and not participate in vehicle control, it makes sense that it is the manufacturer of the autonomous vehicle who is liable for faults caused by its own operation. Take an example where you signal your car to come pick you up at a location. If the car were to get into an accident on its way to you, and a software bug in the vehicle implementation is the cause of the accident, it would make sense that the manufacturer is liable for this accident.

Volvo is one manufacturer who have stated clearly that they will assume liability for the operation of their autonomous cars:

https://www.media.volvocars.com/global/en-gb/media/pressrele...