A method of identifying locations of one or more modules of an apparatus (600, 680, 690, 2200) included in a vehicle for monitoring operation of at least a front set of wheels (10al, 10ar) and a rear set of wheels (10cl, 10cr) of the vehicle, said sets of wheels including a left and a right wheel, said one or more sensor modules operatively mounted to revolve with said sets of wheels, said one or more modules being operatively coupled in communication with a processing arrangement (710, ECU 950) of said vehicle, said one or more modules being operable to sense at least one physical parameter of said wheel and to generate at least one corresponding sensor signal for said processing arrangement, said processing arrangement (710, ECU 950) being operable to process said at least one sensor signal to compute information indicative of operation of said sets of wheels, characterized in that said method includes steps of: (a) arranging for at least one elongate feature to be extending at a non-orthogonal inclined angle relative to a direction of travel of said vehicle; (b) driving said vehicle over said elongate feature to cause said sets of wheels; together with its associated one or more modules, to contact momentarily onto the elongate feature and communicating signals including signal components stimulated by contact of said sets of wheels onto said elongate feature to said processing arrangement, said signals identifying a time at which their wheels contacted onto the elongate feature and one or more identification codes of said one or more modules mounted onto.said sets of wheels; and (c) from a temporal sequence of said signals received at the processing arrangement, identifying locations of said sets of wheels of said vehicle whereat the one or more modules are located, characterized in an additional step of identifying those one or more modules mounted to a wall or onto an inside rim of a tyre of said at least one wheel by identifying periodic pulses in acceleration signal components (Ay, Az) derived from said one or more modules corresponding to rotation of said at least one wheel. (a) arranging for at least one elongate feature to be extending at a non-orthogonal inclined angle relative to a direction of travel of said vehicle; (b) driving said vehicle over said elongate feature to cause said sets of wheels; together with its associated one or more modules, to contact momentarily onto the elongate feature and communicating signals including signal components stimulated by contact of said sets of wheels onto said elongate feature to said processing arrangement, said signals identifying a time at which their wheels contacted onto the elongate feature and one or more identification codes of said one or more modules mounted onto.said sets of wheels; and (c) from a temporal sequence of said signals received at the processing arrangement, identifying locations of said sets of wheels of said vehicle whereat the one or more modules are located, characterized in an additional step of identifying those one or more modules mounted to a wall or onto an inside rim of a tyre of said at least one wheel by identifying periodic pulses in acceleration signal components (Ay, Az) derived from said one or more modules corresponding to rotation of said at least one wheel.