P0115; Troubleshooting - Yamaha XSR 900 2022 Service Manual

EAS20424

P0115

EAS32843

TROUBLESHOOTING

Item
Coolant temperature sensor: signal stuck. Normal signal is not received from the coolant temperature
sensor circuit.
Fail-safe system
• Able to start engine
• Able to drive vehicle
Procedure
TIP
• Perform this procedure when the engine is cold.
• If more than one DTC is detected at the same time, perform troubleshooting of DTC listed below first.
• P0116, P0117, P0118, P0335, P0500, P2122, P2123, P2127, P2128, P2138
1. Defective coolant temperature sensor.
• Measure and note the coolant temperature sensor resistance at ambient temperature.
• Start the engine and warm-up the vehicle.
• Measure the coolant temperature sensor resistance at engine warmed-up, then compare the noted
resistance at ambient temperature.
Is the resistance change?
YES
→ Go to step 2.
NO
a. Allow the engine to cool to ambient temperature, then replace the coolant temperature sensor.
Refer to "CYLINDER HEAD" on page 5-27.
b. Turn the main switch to "ON", then start the engine and warm-up the vehicle.
c. Check the DTC using the malfunction mode of the YDT.
Is it in the "Recovered" condition?
YES
→ Go to step 3, and complete the service.
NO
→ Go to step 2.
2. Malfunction in ECU.
• Replace the ECU, and complete the service.
Refer to "REPLACING THE ECU (Engine Control Unit)" on page 8-41.
3. Delete the DTC and check that the MIL goes off.
• Confirm that the DTC has a condition of "Recovered" using the YDT, and then delete the DTC.
9-119
P0115