Yamaha YZF-R1 Series Service Manual page 738

ECU coupler "2"
Relay unit coupler "3"
A
1
Br/B R/L
Is resistance ∞ Ω?
YES
→ Go to step 5.
NO
a. Replace the wire harness.
b. Execute the diagnostic mode. (Code D43)
Is it hear operating sound?
YES
→ Go to step 6.
NO
→ Go to step 5.
5. Malfunction in ECU.
• Replace the ECU, and complete the service.
Refer to "REPLACING THE ECU (Engine Control Unit)" on page 8-41.
6. Delete the DTC and check that the MIL goes off.
• Start the engine and let it idle for approximately 5 seconds.
• Confirm that the DTC has a condition of "Recovered" using the malfunction mode of the YDT, and
then delete the DTC.
brown/black–any other coupler terminal
red/blue–any other coupler terminal
B
1
Br/B R/L
3
Br/W L/W R/W
L/R L/W R/W L/B L/Y Sb
9-241
P21D2
2
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
L R/L
B/Y Sb/W