Yamaha MBK MW125 2014 Service Manual

FUEL INJECTION SYSTEM8-37Fault code No. 213 Wire harness continuity. Open or short circuit → Replacethe wire harness.Between relay unit coupler andECU coupler.blue/yellow–blue/yellowBetween relay unit coupler andsidestand coupler.blue/yellow–blue/yellowBetween sidestand coupler andground.black–groundTurn the main switch to “ON”,and then extend and retract thesidestand.Fault code number is not dis-played → Service is finished.Fault code number is displayed→ Go to item 4.4 Defective sidestand switch. Execute the diagnostic mode.(Code No. 20)Shift the transmission into gear.Sidestand retracted: “ON”Sidestand extended: “OFF”Replace if defective.Turn the main switch to “ON”,and then extend and retract thesidestand.Fault code number is not dis-played → Service is finished.Fault code number is displayed→ Go to item 5.5 Malfunction in ECU. Replace the ECU.Refer to “REPLACING THEECU (engine control unit)” onpage 8-59.Fault code No. 19Item Sidestand switch: a break or disconnection of the blue/yellow lead ofthe ECU is detected.Fault code No. 21Item Coolant temperature sensor: open or short circuit detected.Fail-safe system Able to start engineAble to drive vehicleDiagnostic code No. 06Tool display Displays the coolant temperature.Procedure Compare the actually measured coolant temperature with the meter dis-play value.Item Probable cause of malfunc-tion and check Maintenance job Confirmation of service com-pletion1 Connection of coolant tempera-ture sensor coupler.Check the locking condition ofthe coupler.Disconnect the coupler andcheck the pins (bent or brokenterminals and locking conditionof the pins).Improperly connected → Con-nect the coupler securely or re-place the wire harness.Turn the main switch to “ON”.Fault code number is not dis-played → Service is finished.Fault code number is displayed→ Go to item 2.2 Connection of wire harnessECU coupler.Check the locking condition ofthe coupler.Disconnect the coupler andcheck the pins (bent or brokenterminals and locking conditionof the pins).Improperly connected → Con-nect the coupler securely or re-place the wire harness.Turn the main switch to “ON”.Fault code number is not dis-played → Service is finished.Fault code number is displayed→ Go to item 3.