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.
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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEMSSFI SYSTEMENGINE COOLANT TEMPERATURE (ECT) SENSORINSPECTION
2004 Toyota Celica GT, Standard
Engine Coolant Temperature (ECT) Sensor: Inspection
2004 Toyota Celica GT, StandardSECTION Inspection
- DRAIN ENGINE COOLANTÂ
- REMOVE NO. 2 CYLINDER HEAD COVERÂ
- REMOVE ECT SENSORÂ
- INSPECT ECT SENSOR RESISTANCEÂ
Using an ohmmeter, measure the resistance between terminals 1 (E2) and 2 (THW).
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Resistance: Refer to the graphÂ
If the resistance is not as specified, replace the ECT sensor.
- REINSTALL ECT SENSORÂ
Install a new gasket to the ECT sensor.
- REINSTALL NO. 2 CYLINDER HEAD COVERÂ
- FILL RADIATOR WITH ENGINE COOLANTÂ
RENDER: 1.0x
NO RELATED
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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.