Yamaha YZF-R1 2020 Service Manual page 648

Between cylinder identification sensor coupler and
ECU coupler
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
a. Replace the wire harness.
b. Crank the engine, 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 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 identification sensor coupler "1"
and ground
Lines short circuit check "B"
Cylinder identification sensor coupler
ECU coupler "2"
A
1
L W/B
B/L
2
1
L/B Y/L
L W/B
L/W B/Y
B/L
L/Y L/W
9-153
white/black–white/black
blue–blue
black/blue–black/blue
P/W P V L L/R Gy
Gy/G Br/W B/L W W/B
Gy/Y G/W G Gy/B W/L
white/black–ground
blue–ground
white/black–any other coupler terminal
blue–any other coupler terminal
black/blue–any other coupler terminal
white/black–any other coupler terminal
blue–any other coupler terminal
black/blue–any other coupler terminal
B
1 2
L W/B
L/B
B/L
L/W
P0340
Y/L P/W P V L L/R
B/Y Gy/G Br/W B/L W
L/Y L/W Gy/Y G/W G Gy/B W/L
Gy
W/B