Yamaha TMAX 2020 Service Manual page 628

TIP
Disconnect the ECU related connectors before checking.
Refer to "PARTS CONNECTED TO THE ECU" on page 9-3.
Ground short circuit check "A"
Between starter relay coupler "3" and ground
Lines short circuit check "B"
Starter relay coupler "3"
ECU coupler "4"
A
3
R R
G/R Br
Is resistance  ?
YES
 Go to step 5.
NO
a. Replace the wire harness.
b. Push the ON/start switch, 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 6, and complete the service.
NO
 Go to step 5.
5. Malfunction in ECU.
• Replace the ECU, and complete the service.
Refer to "REPLACING THE ECU (Engine Control Unit)" on page 8-93.
6. 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.
red–ground
red–any other coupler terminal
red–any other coupler terminal
B
3
R R
G/R Br
9-154
4
Y/R B/G O
Y/W G/B R/B B
R/L Y/R B
R Y/W L/Y R/L B B
P1602