Yamaha YZF-R1 2020 Service Manual page 758

EAS20647
U0125 (FI)
EAS33127
TROUBLESHOOTING
Item
Signals cannot be transmitted between the ECU and the IMU.
Fail-safe system
• Unable to start engine
• Able/Unable to drive vehicle
Procedure
TIP
If more than one DTC is detected at the same time, perform troubleshooting of DTC listed below first.
• P1600
1. Connection of IMU 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 "OFF" and back 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 "OFF" and back 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 ECU coupler "1", joint coupler "2", IMU coupler "3" and ignition fuse "4".
9-263
U0125 (FI)