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 MANUALSMAZDA20066 S, 4D SEDAN, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE CONTROL SYSTEM (AJ)ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTIONRESISTANCE INSPECTION
2006 Mazda 6 s, 4D Sedan, Standard
Resistance Inspection
2006 Mazda 6 s, 4D Sedan, StandardSECTION Resistance Inspection
- Remove the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION ).
- Place the ECT sensor in water with a thermometer, and heat the water gradually.
- Measure the resistance between ECT sensor terminals A and B using an ohmmeter.
- If the ECT sensor is okay, but the PID value is out of specification, perform the "Circuit Open/Short Inspection".
- If not as specified, replace the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION ).
Measure the ECT sensor resistance.
ECT SENSOR - RESISTANCE SPECIFICATION
| ECT (°C {°F}) | Resistance (kilohm) |
|---|---|
| 20 {68} | 35-40 |
| 80(176} | 3.6-4.1 |
ECT sensor characteristics graph (reference)
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.