Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine Coolant Temperature (ECT) Sensor: Inspection
- DRAIN ENGINE COOLANT
- REMOVE ECT SENSOR
- Disconnect the sensor connector.
- Using a 19 mm deep socket wrench, remove the sensor and gasket.
- INSPECT ECT SENSOR
Using an ohmmeter, measure the resistance between the terminals.
Resistance: Refer to Fig 2
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the resistance is not as specified, replace the sensor.
- REINSTALL ECT SENSOR
- Install a new gasket to the sensor.
- Using a 19 mm deep socket wrench, install the sensor.
Torque: 20 N.m (200 kgf.cm, 15 ft.lbf)
- Connect the sensor connector.
- REFILL WITH ENGINE COOLANT
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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