P0117, P0118; Troubleshooting - Yamaha MT-09 2021 Service Manual

EAS20569

P0117, P0118

EAS33049

TROUBLESHOOTING

Item
• [P0117] Coolant temperature sensor: ground short circuit detected.
• [P0118] Coolant temperature sensor: open or power short circuit detected.
Fail-safe system
• Able to start engine
• Able to drive vehicle
Procedure
TIP
Perform this procedure when the engine is cold.
1. Connection of coolant temperature 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. 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 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 7, and complete the service.
NO
→ Go to step 3.
9-121
P0117, P0118