Yamaha YZF-R1 2020 Service Manual page 603

3. Connection of ECU coupler.
• Check the locking condition of the coupler.
• Disconnect the coupler and check the pins (bent or broken terminals and locking condition of the
pins).
Is the coupler condition normal?
YES
→ Go to step 4.
NO
a. Connect the coupler securely or replace the wire harness.
b. Start the engine and let it idle for approximately 1 minute.
c. 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 O
2
• Open circuit check
Between O sensor 1 coupler and ECU coupler
2
Between O sensor 1 coupler and ignition fuse hold-
2
er
3
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 1 minute.
c. 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
sensor 1 coupler "1", ECU coupler "2" and ignition fuse "3".
1
gray/green–gray/green
pink/black–pink/black
black/blue–black/blue
red/white–red/white
2
Y / R P / W P / B Gy / G O / G Gy / R O
Lg / R L / R O / B L / B G / B R / B B
R / L G / Y Br / R Br / B Br / Y Sb / W W / L B
R / G Y / B L / W Y / L Sb R / L B / W B / W
9-108
P00D1, P2195
2
L/B Y/L P/W P V
L/W B/Y Gy/G Br/W
L/Y L/W Gy/Y G/W G
L L/R Gy
B/L W W/B
Gy/B W/L