If you're talking about the throttle position sensor then no I can't see why you would have to reset it but it's a good idea to check it whilst having the tank lifted.
I beleive the TPS tells the ecu where the butterflies are in relation to throttle openings, this dictates the amount of fuel being sent to the injectors.
I'd suggest that you should check the tps using the diag wires once you have fitted the aribox and the chip just to make sure that it is set to 0 as a precautionary measure to eliminate it as being a cause of any problems that you may experience after fitting :thumbup