Yamaha YZF-R1 Series Service Manual page 639

EAS20579
P0340
EAS32839
TROUBLESHOOTING
Item
• Cylinder identification sensor: no normal signals are received from the cylinder identification sensor.
Fail-safe system
• Unable to start engine
• Able to drive vehicle
Procedure
TIP
If more than one DTC is detected at the same time, perform troubleshooting of DTC listed below first.
• P0335
1. Connection of cylinder identification sensor 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. Crank the engine, 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 7, 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. Crank the engine, 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 7, and complete the service.
NO
→ Go to step 3.
3. Wire harness continuity.
• Disconnect the cylinder identification sensor coupler "1" and ECU coupler "2".
• Open circuit check
9-142
P0340