Yamaha YZF-R1 Series Service Manual page 621

EAS20572
P0152
EAS33052
TROUBLESHOOTING
Item
O sensor 2: short circuit detected (power short circuit).
2
Fail-safe system
• Able to start engine
• Able to drive vehicle
Procedure
1. Installed condition of O
• Check for looseness or pinching.
Refer to "ENGINE REMOVAL" on page 5-11.
Is check result OK?
YES
→ Go to step 2.
NO
a. Reinstall or replace the sensor.
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 7, and complete the service.
NO
→ Go to step 2.
2. Connection of O sensor 2 coupler.
2
• 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 7, and complete the service.
NO
→ Go to step 3.
3. 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?
sensor 2.
2
9-124
P0152