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) Sending Unit
2004 Acura 3.5RLSECTION Engine Coolant Temperature (ECT) Sending Unit
- Ensure coolant level is correct and cooling system is operating properly. Remove engine cover. Disconnect Yellow/Green wire from Engine Coolant Temperature (ECT) sending unit. Sending unit is located in middle of engine.
- Using a DVOM, measure resistance between ECT sending unit terminal and ground. With engine coolant at about 122°F (50°C), resistance should be about 226 ohms. With engine coolant at 239°F (115°C), resistance should be about 26.4 ohms. If resistance is considerably different than specified, replace ECT sending unit.
- When installing engine cover, tighten bolts in front of engine first and bolts and nuts on top of engine last. See TORQUE SPECIFICATIONS .
RENDER: 1.0x
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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.