Yamaha YZ250FM 2021 Owner's Service Manual

FUEL INJECTION SYSTEM8-32Fault code No. 44TIPBefore troubleshooting, disconnect the starter motor lead from the starter relay.Fault code No. 44Item EEPROM fault code number: an error is detected while reading orwriting on EEPROM.Fail-safe system Able/Unable to start engineAble/Unable to drive vehicleDiagnostic code No. 60Diagnostic tool displayDisplays the location of the abnormal portion of the EEPROM data.• 00: No fault• 01: CO adjustment valve• 07: Power Tuner injection correction setting 0–8, or Power Tuner igni-tion timing correction setting 0–8Procedure —Item Probable cause of malfunc-tion and check Maintenance job Confirmation of service com-pletion1 Identification of malfunctioningpoint.Execute the diagnostic mode.(Code No. 60)00: Go to item 4.01: Go to item 2.07: Go to item 3.2 “01” is indicated in diagnosticmode. (Code No. 60)EEPROM data error for adjust-ment of CO concentration.Change the CO concentration,and rewrite in EEPROM.After this adjustment, push theengine stop switch, and thenpush the start switch.Start switch to ON (main relayON), and then check the condi-tion of the fault code using themalfunction mode of theYamaha diagnostic tool.Condition is “Recovered”  Goto item 5 and finish the service.Condition is “Detected” Repeat item 1.If the same number is indicated,go to item 4.3 “07” is indicated in diagnosticmode. (Code No. 60)EEPROM data error for settingtool adjustment values for fuelinjection amount or ignition tim-ing.Erase the setting map in thediagnostic mode. (Code No. 65)Start switch to ON (main relayON), and then check the condi-tion of the fault code using themalfunction mode of theYamaha diagnostic tool.Condition is “Recovered”  Goto item 5 and finish the service.Condition is “Detected” Repeat item 1.If the same number is indicated,go to item 4.4 Faulty ECU. Replace the ECU. Service is finished.5 Delete the fault code. Confirm that the fault code hasa condition of “Recovered”using the Yamaha diagnostictool, and then delete the faultcode.