Yamaha TMAX 2020 Service Manual page 621

Is it in the "Recovered" condition?
YES
 Go to step 7, and complete the service.
NO
 Go to step 5.
5. Defective fuel injection system relay.
• Execute the diagnostic mode. (Code D09)
Is the fuel system voltage less than 3V?
YES
a. Replace the fuel injection system relay.
b. Start the engine and let it idle for approximately 5 seconds.
c. 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.
NO
 Go to step 7.
6. Malfunction in ECU.
• 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.
9-147
P0657