Yamaha TMAX 2020 Service Manual page 625

5. Defective sidestand switch.
• Execute the diagnostic mode. (Code D20)
Sidestand retracted
Sidestand extended
Is check result OK?
YES
 Go to step 6.
NO
a. Replace the sidestand switch.
b. Push the ON/start switch, and then extend and retract the sidestand.
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.
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.
9-151
P1601
ON
OFF