2001-2003 Honda TRX500FA Factory Service Manual, Page 383Get this manual
HONDAMATIC Problem Not Det ected by ECM (Gear position indicator does not blink.to notify problem and the problem code is not recorded):
Faulty gear po sition indicato nddrive mode indicato (No ind icationStuck ind icatio n Inco rrect ind ica tio n)
See sec ti 22 for he meter funct ion prob lems (except fo he gear posi ti nd icator and rive mod indicator)
Check the fo llowi ng co nnecto rs for loose co ntactECM 34P (1) Me ter 14P (12jf4 (1') Gear positio switch 4P (4) od selec switch (13)
Correc the fa ulty co nnectio n
Check for contin uity be:ee each gear position sw itch wire term inal of th ECM 34 co nn ecto (1) and groun (pag 23-25)Abnormal-Check th gea position switch between each te rminal of the positi on sw itch 4P connector (4) and ro und Normal