Yamaha YZF-R1 Series Service Manual page 723

Is the coupler condition normal?
YES
→ Go to step 5.
NO
a. Connect the coupler securely or replace the wire harness.
b. Execute the diagnostic mode. (Code D16)
c. Rotate the front wheel by hand and check that the indicated value increases.
Is that value increased?
YES
→ Go to step 10, and complete the service.
NO
→ Go to step 5.
5. 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 6.
NO
a. Connect the coupler securely or replace the wire harness.
b. Execute the diagnostic mode. (Code D16)
c. Rotate the front wheel by hand and check that the indicated value increases.
Is that value increased?
YES
→ Go to step 10, and complete the service.
NO
→ Go to step 6.
6. Wire harness continuity.
• Disconnect the front wheel sensor coupler "1", ABS ECU coupler "2" and ECU coupler "3".
• Open circuit check
Between front wheel sensor coupler and ABS ECU
coupler
Between ABS ECU coupler and ECU coupler
1
B W
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
2
Gy/B L Y G R/B B L/W
L/W B/W
R/W B
G/O W/L L B W W L/B
9-226
black–black
white–white
gray/black–gray/black
3
L/B P/W P
L/W B/Y Gy/G
Gy/Y
L/Y L/W
P2158 (FI)
V L L/R Gy
Br/W B/L W W/B
G/W G Gy/B W/L