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 MANUALSCHEVROLET2006SUBURBAN C1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 275 (ENGINE CONTROL SYSTEM)ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTIONRESISTANCE INSPECTION
2006 Chevrolet Suburban C1500, 5.3 Z
Resistance Inspection
2006 Chevrolet Suburban C1500, 5.3 ZSECTION Resistance Inspection
WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart.
- Disconnect the ECT sensor connector.
- Remove the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION .)
- Place the ECT sensor in the water and while increasing the water temperature, measure the resistance between ECT sensor terminals A and B.
- If the monitor item status/specification (reference) is not within the specification, even though the ECT sensor resistance is within the specification, perform the Circuit Open/Short Inspection .
- If not within the specification, replace the ECT sensor.
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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.