2006-2009 Yamaha YFM700RV Raptor 700RV factory service manual, Page 267Get this manual
FUEL INJECTION SYSTEM Fault code No43
Symptom The ECU is unable to monitor the battery voltage (an open or short circuit in the line to the ECU)Fuel 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 relay unit coupler and ECU coupler(blueredbluered) (redblueredblue) Between relay unit coupler and battery terminal(browngreenred) Between relay unit coupler and 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