Yamaha 2014 MT-07 Service Manual

FUEL INJECTION SYSTEM8-47Fault code No. 223 Wire harness continuity. Open or short circuit → Replacethe wire harness.Between coolant temperaturesensor coupler and sub-wireharness coupler.green/white–green/whiteblack/blue–black/blueBetween sub-wire harness cou-pler and ECU coupler.green/white–green/whiteBetween sub-wire harness cou-pler and joint coupler.black/blue–black/blueBetween joint coupler and ECUcoupler.black/blue–black/blueTurn the main switch to “ON”.Fault code number is not dis-played → Service is finished.Fault code number is displayed→ Go to item 4.4 Installed condition of coolanttemperature sensor.Check for looseness or pinch-ing.Improperly installed sensor →Reinstall or replace the sensor.Turn the main switch to “ON”.Fault code number is not dis-played → Service is finished.Fault code number is displayed→ Go to item 5.5 Defective coolant temperaturesensor.Execute the diagnostic mode.(Code No. 06)When engine is cold:Displayed temperature is closeto the ambient temperature.The displayed temperature isnot close to the ambient temper-ature → Check the coolant tem-perature sensor.Replace if defective.Refer to “CHECKING THECOOLANT TEMPERATURESENSOR” on page 8-138.Turn the main switch to “ON”.Fault code number is not dis-played → Service is finished.Fault code number is displayed→ Go to item 6.6 Malfunction in ECU. Replace the ECU.Refer to “REPLACING THEECU (engine control unit)” onpage 8-128.Fault code No. 21Item Coolant temperature sensor: open or short circuit detected.Fault code No. 22Item Intake air temperature sensor: open or short circuit detected.Fail-safe system Able to start engineAble to drive vehicleDiagnostic code No. 05Meter display Displays the air temperature.Procedure Compare the actually measured air temperature with the meter displayvalue.Item Probable cause of malfunc-tion and check Maintenance job Confirmation of service com-pletion