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 MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 42 (ENGINE CONTROLS - SYSTEM & COMPONENT TESTING)ENGINE SENSORS & SWITCHESENGINE COOLANT TEMPERATURE (ECT) SENSOR
2004 Toyota Matrix XR, FWD, Standard
Engine Coolant Temperature (ECT) Sensor
2004 Toyota Matrix XR, FWD, StandardSECTION Engine Coolant Temperature (ECT) Sensor
WARNING: This page is about a different car, the 2002 Lexus RX 300 and 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure ignition is off. Note location of ECT sensor. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION table. Remove ECT sensor.
- Place probe end of ECT sensor and thermometer in container of water. Attach ohmmeter between ECT sensor terminals. Heat water and note that resistance is within specification in relation to temperature. See Fig 1. Replace ECT sensor if resistance is not within specification.
- Using NEW gasket, install ECT sensor. Tighten ECT sensor to 15 ft. lbs. (20 N.m). Fill cooling system.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION
| Model | Location |
|---|---|
| ES300 | On Coolant Housing In Front Of Intake Manifold, At Timing Belt End Of Engine & Contains Dark Gray 2-Pin Connector With Green/Black & Brown Wires |
| RX300 | On Coolant Housing In Front Of Intake Manifold, At Timing Belt End Of Engine & Contains Dark Gray 2-Pin Connector With Green/White & Brown Wires |
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.