2001-2003 Honda TRX500FA Factory Service Manual, Page 399Get this manual
TECHNICAL FEATURES HONDAMATIC ELECTRICAL SYSTEM CONSTRUCTION OUTLINE The output speed (red uct io rat iois co nt ro lled by the ang le of the hyd raulic motor side swa sh plateThe position th is swash pl ate is determ ined by th ECM which uses ari ous pieces of info rm ation send co ands he co nt ro motor th at oves th swa sh plate arm .The sign als used to det er mine opti al aut omatic transmissio out pu are:Throttle op eni ng (t hrott le se nsor- Vehicl speed (speed senso r)Eng ine speed (rpm(igniti pul se generator)ut mat ic transmission contro motor swa sh plate angle (ang le senso r)Sub -tr ansmission gear position (g ear posit io switch-R, N, D,- Control mode and map (drive mode select sw itch-D1, D2, ESP)Manual shift rang (ESP sh ift swit ch-23, 4, 5)