Yamaha MT-09 2021 Service Manual page 554

Is check result OK?
YES
→ Go to step 5.
NO
a. Reinstall the sensor.
b. Turn the main switch to "ON", and then check the condition of the DTC using the malfunction
mode of the YDT.
Is it in the "Recovered" condition?
YES
→ Go to step 7, and complete the service.
NO
→ Go to step 5.
5. Defective coolant temperature sensor.
• Execute the diagnostic mode. (Code 06)
• When engine is cold: Displayed temperature is close to the ambient temperature.
• The displayed temperature is not close to the ambient temperature → Check the coolant tempera-
ture sensor.
Refer to "CHECKING THE COOLANT TEMPERATURE SENSOR" on page 8-63.
Is check result OK?
YES
→ Go to step 6.
NO
a. Replace the coolant temperature sensor.
Refer to "CYLINDER HEAD" on page 5-26.
b. Turn the main switch to "ON", and then check the condition of the DTC using the malfunction
mode of the YDT.
Is it in the "Recovered" condition?
YES
→ Go to step 7, and complete the service.
NO
→ Go to step 6.
6. Malfunction in ECU.
• Replace the ECU, and complete the service.
Refer to "REPLACING THE ECU (Engine Control Unit)" on page 8-56.
7. Delete the DTC and check that the MIL goes off.
• Confirm that the DTC has a condition of "Recovered" using the YDT, and then delete the DTC.
9-124
P0117, P0118