DTC P0115-15: Engine Coolant Temperature Sensor 1 Circuit Short to Battery or Open [10/2022 - ]: Procedure
WARNING: This page is about a different car, the 2025 Toyota Highlander, 2024 Toyota Highlander, and 2023 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE USING GTS (CHECK FOR OPEN IN WIRE HARNESS)
*1 Engine Coolant Temperature Sensor (for Outlet Side) *2 ECM *a Front view of wire harness connector
(to Engine Coolant Temperature Sensor (for Outlet Side))- - - Disconnect the engine coolant temperature sensor (for outlet side) connector.
- Connect terminals 1 and 2 of the engine coolant temperature sensor (for outlet side) connector on the wire harness side.
- According to the display on the GTS, read the Data List.
Powertrain > Engine > Data List
Tester Display Coolant Temperature OK
GTS Display Specified Condition Coolant Temperature Higher than 135°C (275°F) HINT:
Perform "Inspection After Repair" after replacing the engine coolant temperature sensor (for outlet side).
Refer to INITIALIZATION [10/2022 - ]
Result
Proceed to OK NG
Result:
OK
REPLACE ENGINE COOLANT TEMPERATURE SENSOR (FOR OUTLET SIDE). Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]
Result:
NG
See step 2
- CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR (FOR OUTLET SIDE) - ECM)
- Disconnect the engine coolant temperature sensor (for outlet side) connector.
- Disconnect the ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition C40-2 - C88-80 (THW) Always Below 1 Ω C40-1 - C88-81 (ETHW) Always Below 1 Ω C40-2 or C88-80 (THW) - Other terminals Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE ECM. Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR