Yamaha TMAX 2020 Service Manual page 585

6. Malfunction in ECU.
• Execute the diagnostic mode. (Code D30)
• Confirm that spark plug does not sparking.
• Replace the ECU, and complete the service.
Refer to "REPLACING THE ECU (Engine Control Unit)" on page 8-93.
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.
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