2007-2008 Yamaha YFM700 Grizzly Factory Service Manual, Page 296Get this manual
FUEL INJECTION SYSTEM Fault code No43
Symptom Power supply to the injector and fuel pump is not normalFuel system voltage Check or maintenance job Check the coupler for any pins that may be pulled out Check the locking condition of the coupler If there is malfunction, repair it and connect the coupler securely Repair or replace if there is an open or short circuit Between fuel injection system relay coupler and ECU coupler(blueredbluered) (redblueredblue) Between fuel injection system relay coupler and starter relay coupler(brownblackbrownblack) Between fuel injection system relay coupler and left handlebar switch coupler(redblackredblack) Execute the diagnostic mode(Code No.D09) Replace if defective If there is no malfunction with the relay unit, replace the ECUReinstatement method Starting the engine and operating it at idle