Yamaha XP560D, Service Manual

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9-142
P0638
Ground short circuit check “A”
Lines short circuit check “B”
5. Defective throttle servo motor.
• Check the throttle servo motor.
Refer to “CHECKING THE THROTTLE SERVO MOTOR” on page 8-108.
Between ECU coupler “2” and ground
yellow/red–ground
yellow/white–ground
red/blue–ground
Throttle servo motor coupler “1”
yellow/red–any other coupler terminal
yellow/white–any other coupler terminal
ECU coupler “2”
yellow/red–any other coupler terminal
yellow/white–any other coupler terminal
red/blue–any other coupler terminal
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.
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.
O B/G Y/R
B R/B G/B Y/ W
B Y/R R/L
B B R/L L/Y Y/ W R
O B/G Y/R
B R/B G/B Y/ W
B Y/R R/L
B B R/L L/Y Y/ W R
Y/R Y/ W
2 1 2
A B