1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 384Get this manual
ELECTRIC SHIFT PROGRAM (ESP)
TROUBLESHOOTING
TROUBLESHOOTING REAlURE
When the Electronic Control Unit detec:tsa syst,em abnormalitythe Electronic Control Unit hasa built-in selfdlagnostic fun,etlon that stops the Electronic Shift (ES) activity or resets the sy, tem ent'i rely Gust as wnen th ig nitionswitch is turned from OFF tu ON)The 'Electronic Control Unit does not have the capability to inform the operator of the Cause of the abnormality, except that the ES function stops immediately when the Electronic Contror Unit detects failure conditionAs the 2nd3rdand 4th gear pOSitions are activ8t,ad by signals from the El ectronic Contro Unit, when the engine stops, he dispray will on, show dashes for those pOSitionsThe gear position can only be determ ined by manually shifting sing the shifting tool that comes with tne vehicle) into, 'r everse, lOeutral, first, or fifth gear the transmission (if possible, u1 (which appear on the display)When the Electronic Control Unit is in mode, the shiftfiunctjon is immediately deactivated and will remain so until: the main switch is turned to the OFF positionWhen the main switch is turned back ONthe Electronic Control Unit will be reacti,ved un less it immediately detects another FA ILcond ition lflhe Electronic Control Unit does not immediately detectAIL conditionthe operator can then document the conditi ons tha't le ad to another "failure" modeF