2006-2009 Suzuki LT-R450 Service Manual, Page 180Get this manual
FI SYSTEM DIAGNOSIS
Step (When indicating P1651-L:) 1) Turn the ignition switch OFF 2) Remove the front fender(tJ"7 -6) 3) Check the TO sensor coupler for loose or poor contactsIf OK, then check the TO sensor lead wire continuity
4) Disconnect the TO sensor coupler5) Check the continuity between BrW wire 6) Also, check the continuity between BrIW wire
and ground and BBr
wire If the sound is not heard from the tester, the circuit condition is OK
7) Remove the headlight assembly (tJ"4-33) 8) Disconnect the ECM coupler9) Check the continuity between Red wire and terminal 10)Also, then check the continuity between BrIW wire and terminal CZl