Yamaha MT-09 2021 Service Manual page 682

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 16)
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 16)
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 "1" and
ABS ECU coupler "2"
Between ABS ECU coupler "2" and ECU cou-
pler "3"
brown–brown
yellow–yellow
white/green–white/green
9-252
P2158