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 Sensor
2004 Acura 3.5RLSECTION Engine Coolant Temperature Sensor
- ECT sensor is located in coolant pipe, near throttle body and contains a Red/White wire and Green/Blue wire in harness connector. See Figure .
- Disconnect harness connector from ECT sensor. Measure sensor resistance in accordance with engine coolant temperature. See ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE table. Replace ECT sensor if resistance is not as specified.
ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE
| Temperature °F (°C) | (1) Ohms | ||
|---|---|---|---|
| -4 (-20) | 15,000-18,000 | ||
| 68 (20) | 2500-3500 | ||
| 175 (80) | 400-600 | ||
| 212 (100) | 250-350 | ||
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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.