Yamaha YZF-R1 Series Service Manual page 662

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 "3".
• Open circuit check
Between radiator fan motor relay and ignition fuse
holder
red/white–red/white
9-165
P0480