  Here consciousness itself is not typically treated as a substantive entity but merely the abstract reification of whatever property or aspect is attributed by the relevant use of the adjective “conscious”. Access consciousness is just the property of having the required sort of internal access relations, and qualitative consciousness is simply the property that is attributed when “conscious” is applied in the qualitative sense to mental states. How much this commits one to the ontological status of consciousness per se will depend on how much of a Platonist one is about universals in general. (See the entry on  the medieval problem of universals.)  It need not commit one to consciousness as a distinct entity any more than one's use of “square”, “red” or “gentle” commits one to the existence of squareness, redness or gentleness as distinct entities.