2001-2003 Honda TRX500FA Factory Service Manual, Page 370Get this manual
HONDAMATIC Problem Code 2: Speed sensor syst em
Put the ge arshift lever in range and test-drive the vehicl e
Does not driveCheck he echanical system (sectio 131
Check the indication of the speedometer when driving at low speed
Perfo rm the tr oubleshoot ng of ete rspeed sensor [section 221
Check th ECM 34P connector1) and he spe ed }- Abn ormal sensor 3P connector (5) for loose contact!I
Cor rec he aulty pa rt
Check install ation condition of the speed sensor and sensor insulato (page 22-8 )Norm al