My experience in the 441, No it doesn't autotrim, it uses the servo to fight the trim tab to zero the yaw. It is annoying, as you change speeds or power the rudder gets out of trim. There is no way to know how out of trim you are without disconnecting the yaw damper. Which always happens with a jolt. Most pilots develop a ded-reckoning way of knowing how many swipes to take as they transition from climb to cruise etc.
It is a super effective yaw damper though.