Yamaha YZF-R1 Series Service Manual page 687

NO
a. Replace the electronic throttle valve fuse.
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 4.
4. Wire harness continuity.
• Disconnect the throttle servo motor coupler "1", ECU coupler "2" and electronic throttle valve fuse
"3".
• Open circuit check
Between throttle servo motor coupler and ECU cou-
pler
Between ECU coupler and electronic throttle valve
fuse holder
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
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 "Short circuit check".
• Short circuit check
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 ECU coupler "2" and ground
1
3
Lg/R Y/R
9-190
yellow/red–yellow/red
light green/red–light green/red
red/blue–red/blue
2
Y/R P/W P/B O/G Gy/G
Lg/R L/R L/B O/B R/B
R/L G/Y Br/R Br/Y Br/B W/L
R/G Y/B L/W Y/L Sb
yellow/red–ground
light green/red–ground
red/blue–ground
P0638
O Gy/R
G/B B
Sb/W B
R/L B/W B/W