Yamaha MT-09 2021 - Page 523

9-93
P0030
TIP
For this check, also set the stop/run/start switch to “ON”.
3. Wire harness continuity.
• Disconnect the O
2
sensor coupler “1”, ECU coupler “2”and ignition fuse 1 “3”.
• Open circuit check
Is the coupler condition normal?
YES
→ Go to step 3.
NO
a. Connect the coupler securely or replace the wire harness.
b. Turn the main switch to “ON”, and then check the condition of the DTC using the malfunction
mode of the YDT.
Is it in the “Recovered” condition?
YES
→ Go to step 6, and complete the service.
NO
→ Start the engine, and then check the condition of the DTC.
Is it in the “Recovered” condition?
YES
→ Go to step 6, and complete the service.
NO
→ Go to step 3.
Between O
2
sensor coupler “1” and ECU cou-
pler “2”
pink/black–pink/black
Between O
2
sensor coupler “1” and ignition fuse
holder “3”
red–red
Is resistance 0 Ω?
YES
→ Go to “Short circuit check”.
NO
a. Replace the wire harness.
b. Turn the main switch to “ON”, and then check the condition of the DTC using the malfunction
mode of the YDT.
R P/B
Gy/G
B/L
O
Gy/RO/GP/BY/R
B R/BG/BL/BLg/R
B G/YR/L
B/WB/WR/LL/WY/BY/RR/G
1
2
3