Yamaha YZF-R1 Series Service Manual page 688

Lines short circuit check "B"
Throttle servo motor coupler "1"
ECU coupler
A
2
Y/R P/W P/B O/G Gy/G O
Lg/R L/R L/B O/B R/B G/B
R/L G/Y Br/R Br/Y Br/B W/L Sb/W B
R/G Y/B L/W Y/L Sb R/L B/W
Is resistance ∞ Ω?
YES
→ Go to step 5.
NO
a. Replace the wire harness.
b. Turn the main switch to "ON", 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 8-49.
Is check result OK?
YES
→ Go to step 6.
NO
a. Replace the throttle bodies.
Refer to "REPLACING THE THROTTLE BODIES" on page 7-17.
b. Turn the main switch to "ON", 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 6.
6. Defective throttle bodies.
• Check the throttle bodies.
Refer to "CHECKING THE THROTTLE SERVO MOTOR" on page 8-49.
Gy/R
B
B/W
9-191
yellow/red–any other coupler terminal
light green/red–any other coupler terminal
yellow/red–any other coupler terminal
light green/red–any other coupler terminal
red/blue–any other coupler terminal
B
1
Lg/R Y/R
2
Y/R P/W P/B O/G Gy/G O Gy/R
Lg/R L/R L/B O/B R/B G/B B
R/L G/Y Br/R Br/Y Br/B W/L Sb/W B
R/G Y/B L/W Y/L Sb R/L B/W B/W
P0638