P0480; Troubleshooting - Yamaha MT-09 2021 Service Manual

EAS20585

P0480

EAS33065

TROUBLESHOOTING

Item
Radiator fan motor relay: open or short circuit detected.
Fail-safe system
• Able to start engine
• Able to drive vehicle
Procedure
1. Connection of radiator fan motor relay 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 2.
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
→ Go to step 2.
2. 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 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
→ Go to step 3.
3. Wire harness continuity.
• Disconnect the radiator fan motor relay "1", ECU coupler "2" and ignition fuse 1 "3".
• Open circuit check
9-171
P0480