Yamaha YZF-R1 Series Service Manual page 595

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 sensor 1 coupler "1", ECU coupler "2" and ignition fuse "3".
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
2
Y/R
1
R/G
gray/green–gray/green
pink/black–pink/black
black/blue–black/blue
red/white–red/white
2
P/W P/B O/G Gy/G O Gy/R
L/B
Lg/R L/R L/B O/B R/B G/B B
L/W
R/L G/Y Br/R Br/Y Br/B W/L Sb/W B
Y/B L/W Y/L Sb R/L B/W B/W
9-98
P00D1, P2195
P/W P V L L/R Gy
B/Y Gy/G Br/W B/L W W/B
L/Y L/W Gy/Y G/W G Gy/B W/L