Hello welcome to just answer I am master tech and will be able to assist you today.
I have to ask if you plugged in both connectors at the rack ?
also their is a torque sensor neutral position procedure Has to be done. this will require the use of the Acura MVCI scanner.
it does not specify in the manual. only that it has to be done anytime the rack is removed. it has a control unit and im thinking it will not see the input until its matted to the control unit.
this is the only info they are showing for replacing the rack.