Yield
as it  is used in this verse, means,

Give up; give in, give way; surrender.
Let not sin therefore reign in your mortal body,
that ye should obey it in the lusts thereof. 
Neither yield ye your members
as instruments of unrighteousness unto sin:
but yield yourselves unto God,
as those that are alive from the dead,
and your members as
instruments of righteousness
unto God.

Romans 
6:12-13