2001-2003 Honda TRX500FA Factory Service Manual, Page 379Get this manual
HONDAMATIC Proble Code 1: ESP shift switch syst em
Check th ECM 34P co nnector1) and the and lebar sw itch (includi ng shift switch) lOP connector (10) fo loose contact
Correct th fau lty part
Check fo co nti nuity between the shi ft swi tch ire erm inal of he ECM connecto1) (pag 23-26)!I
I- Abn ormal
Rem ov the han dlebar switch (sect ion 14) and check fo ater, mud and ot her fore ign material inside the switchNorm al
Abn ormal
Clean inside the switd1