Yamaha YZF-R1 Series Service Manual page 647

Between cylinder-#2 ignition coil coupler and ECU
coupler
Between cylinder-#2 ignition coil coupler and han-
dlebar switch (right) coupler
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
a. Replace the wire harness.
b. Start the engine and let it idle for approximately 5 seconds.
c. Check the condition of the DTC using the malfunction mode of the YDT.
Is it in the "Recovered" condition?
YES
→ Go to step 7, 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 cylinder-#2 ignition coil coupler "1" and
ground
Lines short circuit check "B"
Cylinder-#2 ignition coil coupler
ECU coupler "2"
Handlebar switch (right) coupler "3"
A
1
Gy/R
gray/red–gray/red
red/white–red/white
2
1
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
gray/red–ground
red/white–ground
gray/red–any other coupler terminal
red/white–any other coupler terminal
gray/red–any other coupler terminal
red/white–any other coupler terminal
B
9-150
3
Gy/R
1
2
Gy/R
Y/R P/W P/B
Lg/R L/R L/B
R/L G/Y Br/R Br/Y
R/G Y/B L/W Y/L
P0352
3
O/G Gy/G O Gy/R
O/B R/B G/B B
Br/B W/L Sb/W B
Sb R/L B/W B/W