Yamaha TMAX 2020 Service Manual page 616

Ground short circuit check "A"
Between ECU coupler "2" and ground
Lines short circuit check "B"
Throttle servo motor coupler "1"
ECU coupler "2"
A
2
Y/R
Y/W
R/L Y/R
R Y/W L/Y
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 8, and complete the service.
NO
 Go to step 5.
5. Defective throttle servo motor.
• Check the throttle servo motor.
Refer to "CHECKING THE THROTTLE SERVO MOTOR" on page 8-108.
Is check result OK?
YES
 Go to step 6.
NO
a. Replace the throttle bodies.
Refer to "REPLACING THE THROTTLE BODIES" on page 7-11.
b. Push the ON/start switch, and then check the condition of the DTC using the malfunction mode
of the YDT.
B/G O
G/B R/B B
B
R/L B B
yellow/red–ground
yellow/white–ground
red/blue–ground
yellow/red–any other coupler terminal
yellow/white–any other coupler terminal
yellow/red–any other coupler terminal
yellow/white–any other coupler terminal
red/blue–any other coupler terminal
B
2
Y/R
Y/W
R/L Y/R
R Y/W L/Y
9-142
1
B/G O
G/B R/B B
B
R/L B B
P0638
Y/W Y/R