DTC P0115-11: Engine Coolant Temperature Sensor 1 Circuit Short to Ground [08/2023 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus RX 450h+, 2025 Lexus RX 350h, 2024 Lexus RX 450h+, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS)
Pre-procedure1
- Disconnect the engine coolant temperature sensor connector.
*1 Engine Coolant Temperature Sensor *2 ECM
- According to the display on the GTS, read the Data List.
Powertrain > Engine > Data List
Tester Display Coolant Temperature Result
Result Proceed to The value of Coolant Temperature is -40 °C A None of the above conditions are met B HINT:
-40°C=-40°F
Post-procedure1
- None.
Result:
A
REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to REMOVAL [08/2023 - ]
Result:
B
See step 2
- Disconnect the engine coolant temperature sensor connector.
- CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)
Pre-procedure1
- Disconnect the engine coolant temperature sensor connector.
- Disconnect the ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Result B22-2 (THW) or B28-125 (THW) - Body ground and other terminals Always 10 kΩ or higher kΩ Result
Proceed to OK NG
Post-procedure1
- None.
Result:
OK
REPLACE ECM. Refer to REMOVAL [08/2023 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR