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 MANUALSEAGLE1990PREMIER ESREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSCOOLANT TEMPERATURE SENSOR TEST
1990 Eagle Premier ES
Coolant Temperature Sensor Test
1990 Eagle Premier ESSECTION Coolant Temperature Sensor Test
- Disconnect electrical connector from coolant temperaute sensor. Coolant temperature sensor is installed in thermostat housing. Using a DVOM, check resistance between ECU connector terminal "C10" to sensor connector and ECU connector terminal "D3" to sensor connector. See Fig 1 .
- If resistance is greater than one ohm, repair wiring harness. Measure resistance of sensor between sensor terminals. Refer to COOLANT TEMPERATURE SENSOR RESISTANCE
table. Replace coolant temperature sensor if not within specification.COOLANT TEMPERATURE SENSOR RESISTANCE (1)
°F (°C) Ohms 212 (100) 185 160 (70) 450 100 (38) 1600 70 (20) 3400 40 (4) 7500 20 (-7) 13,500 0 (-18) 25,500 -40 (-40) 100,700 (1) Values given are approximate.
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.