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 MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 444 (ENGINE CONTROL SYSTEM)ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTIONRESISTANCE INSPECTIONNOTES
2010 Mazda 5 Sport, 2.3 L, Standard
Resistance Inspection: Notes
2010 Mazda 5 Sport, 2.3 L, StandardSECTION Notes
WARNING: This page is about a different car, the 2005 Mazda RX-8 and 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the ECT sensor connector.
- Remove the ECT sensor.
- Place the detection part of the ECT sensor in water and verify that the resistance between ECT sensor terminals A and B is as indicated in the table while gradually increasing water temperature.
- If the monitor item condition/specification (reference) is not within the specification, even though the resistance is within the specification, perform the "CIRCUIT OPEN/SHORT INSPECTION ".
- If not within the specification, replace the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION .)
ECT SENSOR RESISTANCE SPECIFICATIONWater temperature (°C {°F}) Resistance (ohm) 20 {68} 2,205-2,695 80 {176} 287-349 91 {196} 227-240
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.