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 MANUALSMERCURY2010MOUNTAINEER AWD V6-4.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONPINPOINT TESTSTEST DX: ENGINE COOLANT TEMPERATURE (ECT) SENSOR
2010 Mercury Mountaineer AWD V6-4.0L
Test DX: Engine Coolant Temperature (ECT) Sensor
2010 Mercury Mountaineer AWD V6-4.0LSECTION Test DX: Engine Coolant Temperature (ECT) Sensor
PINPOINT TEST DX: ENGINE COOLANT TEMPERATURE (ECT) SENSOR
Note, Temperature Sensor Voltage And Resistance Specifications:
Temperature Sensor Voltage And Resistance Specifications And Engine Coolant Temperature (ECT) Sensor Connector And Powertrain Control Module (PCM) Connector:
DX1-DX3:
DX4-DX7:
DX8-DX11:
DX12-DX14:
DX15-DX17:
DX18-DX20:
DX21-DX23:
DX24-DX25:
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.