I suppose anything is possible, but it is much easier to remove the cluster and then you get a clear view of the valve. On the air bag equipped cars, you need to unhook the red connector under the floor mat in the passenger footwell (behind the black plastic cover), then unhook the battery cable. A torx socket is need to remove the air bag as well. Remember to mark the steering wheel in reference with the steering shaft mark in order to get the steering wheel in the same location, as it probably has no marks from the factory. After the steering wheel is off, it is a piece of cake to take the cluster out.

There is a filter in the inlet to the valve which is most likely plugged. Your valve is likely okay otherwise. It might be possible to get the inlet hose off from under the dash to get the screen out, but again it is a real pain to see much up there with the cluster installed.